Import of zlib-1.2.2.2.tar.gz

2 files changed, 2525 insertions, 0 deletions

diff --git a/cpukit/zlib/contrib/inflate86/inffas86.c b/cpukit/zlib/contrib/inflate86/inffas86.c
new file mode 100644
index 0000000000..6da76358cc
--- /dev/null
+++ b/cpukit/zlib/contrib/inflate86/inffas86.c
@@ -0,0 +1,1157 @@
+/* inffas86.c is a hand tuned assembler version of
+ *
+ * inffast.c -- fast decoding
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Copyright (C) 2003 Chris Anderson <christop@charm.net>
+ * Please use the copyright conditions above.
+ *
+ * Dec-29-2003 -- I added AMD64 inflate asm support.  This version is also
+ * slightly quicker on x86 systems because, instead of using rep movsb to copy
+ * data, it uses rep movsw, which moves data in 2-byte chunks instead of single
+ * bytes.  I've tested the AMD64 code on a Fedora Core 1 + the x86_64 updates
+ * from http://fedora.linux.duke.edu/fc1_x86_64
+ * which is running on an Athlon 64 3000+ / Gigabyte GA-K8VT800M system with
+ * 1GB ram.  The 64-bit version is about 4% faster than the 32-bit version,
+ * when decompressing mozilla-source-1.3.tar.gz.
+ *
+ * Mar-13-2003 -- Most of this is derived from inffast.S which is derived from
+ * the gcc -S output of zlib-1.2.0/inffast.c.  Zlib-1.2.0 is in beta release at
+ * the moment.  I have successfully compiled and tested this code with gcc2.96,
+ * gcc3.2, icc5.0, msvc6.0.  It is very close to the speed of inffast.S
+ * compiled with gcc -DNO_MMX, but inffast.S is still faster on the P3 with MMX
+ * enabled.  I will attempt to merge the MMX code into this version.  Newer
+ * versions of this and inffast.S can be found at
+ * http://www.eetbeetee.com/zlib/ and http://www.charm.net/~christop/zlib/
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+/* Mark Adler's comments from inffast.c: */
+
+/*
+   Decode literal, length, and distance codes and write out the resulting
+   literal and match bytes until either not enough input or output is
+   available, an end-of-block is encountered, or a data error is encountered.
+   When large enough input and output buffers are supplied to inflate(), for
+   example, a 16K input buffer and a 64K output buffer, more than 95% of the
+   inflate execution time is spent in this routine.
+
+   Entry assumptions:
+
+        state->mode == LEN
+        strm->avail_in >= 6
+        strm->avail_out >= 258
+        start >= strm->avail_out
+        state->bits < 8
+
+   On return, state->mode is one of:
+
+        LEN -- ran out of enough output space or enough available input
+        TYPE -- reached end of block code, inflate() to interpret next block
+        BAD -- error in block data
+
+   Notes:
+
+    - The maximum input bits used by a length/distance pair is 15 bits for the
+      length code, 5 bits for the length extra, 15 bits for the distance code,
+      and 13 bits for the distance extra.  This totals 48 bits, or six bytes.
+      Therefore if strm->avail_in >= 6, then there is enough input to avoid
+      checking for available input while decoding.
+
+    - The maximum bytes that a single length/distance pair can output is 258
+      bytes, which is the maximum length that can be coded.  inflate_fast()
+      requires strm->avail_out >= 258 for each loop to avoid checking for
+      output space.
+ */
+void inflate_fast(strm, start)
+z_streamp strm;
+unsigned start;         /* inflate()'s starting value for strm->avail_out */
+{
+    struct inflate_state FAR *state;
+    struct inffast_ar {
+/* 64   32                               x86  x86_64 */
+/* ar offset                              register */
+/*  0    0 */ void *esp;                /* esp save */
+/*  8    4 */ void *ebp;                /* ebp save */
+/* 16    8 */ unsigned char FAR *in;    /* esi rsi  local strm->next_in */
+/* 24   12 */ unsigned char FAR *last;  /*     r9   while in < last */
+/* 32   16 */ unsigned char FAR *out;   /* edi rdi  local strm->next_out */
+/* 40   20 */ unsigned char FAR *beg;   /*          inflate()'s init next_out */
+/* 48   24 */ unsigned char FAR *end;   /*     r10  while out < end */
+/* 56   28 */ unsigned char FAR *window;/*          size of window, wsize!=0 */
+/* 64   32 */ code const FAR *lcode;    /* ebp rbp  local strm->lencode */
+/* 72   36 */ code const FAR *dcode;    /*     r11  local strm->distcode */
+/* 80   40 */ unsigned long hold;       /* edx rdx  local strm->hold */
+/* 88   44 */ unsigned bits;            /* ebx rbx  local strm->bits */
+/* 92   48 */ unsigned wsize;           /*          window size */
+/* 96   52 */ unsigned write;           /*          window write index */
+/*100   56 */ unsigned lmask;           /*     r12  mask for lcode */
+/*104   60 */ unsigned dmask;           /*     r13  mask for dcode */
+/*108   64 */ unsigned len;             /*     r14  match length */
+/*112   68 */ unsigned dist;            /*     r15  match distance */
+/*116   72 */ unsigned status;          /*          set when state chng*/
+    } ar;
+
+#if defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 )
+#define PAD_AVAIL_IN 6
+#define PAD_AVAIL_OUT 258
+#else
+#define PAD_AVAIL_IN 5
+#define PAD_AVAIL_OUT 257
+#endif
+
+    /* copy state to local variables */
+    state = (struct inflate_state FAR *)strm->state;
+    ar.in = strm->next_in;
+    ar.last = ar.in + (strm->avail_in - PAD_AVAIL_IN);
+    ar.out = strm->next_out;
+    ar.beg = ar.out - (start - strm->avail_out);
+    ar.end = ar.out + (strm->avail_out - PAD_AVAIL_OUT);
+    ar.wsize = state->wsize;
+    ar.write = state->write;
+    ar.window = state->window;
+    ar.hold = state->hold;
+    ar.bits = state->bits;
+    ar.lcode = state->lencode;
+    ar.dcode = state->distcode;
+    ar.lmask = (1U << state->lenbits) - 1;
+    ar.dmask = (1U << state->distbits) - 1;
+
+    /* decode literals and length/distances until end-of-block or not enough
+       input data or output space */
+
+    /* align in on 1/2 hold size boundary */
+    while (((unsigned long)(void *)ar.in & (sizeof(ar.hold) / 2 - 1)) != 0) {
+        ar.hold += (unsigned long)*ar.in++ << ar.bits;
+        ar.bits += 8;
+    }
+
+#if defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 )
+    __asm__ __volatile__ (
+"        leaq    %0, %%rax\n"
+"        movq    %%rbp, 8(%%rax)\n"       /* save regs rbp and rsp */
+"        movq    %%rsp, (%%rax)\n"
+"        movq    %%rax, %%rsp\n"          /* make rsp point to &ar */
+"        movq    16(%%rsp), %%rsi\n"      /* rsi  = in */
+"        movq    32(%%rsp), %%rdi\n"      /* rdi  = out */
+"        movq    24(%%rsp), %%r9\n"       /* r9   = last */
+"        movq    48(%%rsp), %%r10\n"      /* r10  = end */
+"        movq    64(%%rsp), %%rbp\n"      /* rbp  = lcode */
+"        movq    72(%%rsp), %%r11\n"      /* r11  = dcode */
+"        movq    80(%%rsp), %%rdx\n"      /* rdx  = hold */
+"        movl    88(%%rsp), %%ebx\n"      /* ebx  = bits */
+"        movl    100(%%rsp), %%r12d\n"    /* r12d = lmask */
+"        movl    104(%%rsp), %%r13d\n"    /* r13d = dmask */
+                                          /* r14d = len */
+                                          /* r15d = dist */
+"        cld\n"
+"        cmpq    %%rdi, %%r10\n"
+"        je      .L_one_time\n"           /* if only one decode left */
+"        cmpq    %%rsi, %%r9\n"
+"        je      .L_one_time\n"
+"        jmp     .L_do_loop\n"
+
+".L_one_time:\n"
+"        movq    %%r12, %%r8\n"           /* r8 = lmask */
+"        cmpb    $32, %%bl\n"
+"        ja      .L_get_length_code_one_time\n"
+
+"        lodsl\n"                         /* eax = *(uint *)in++ */
+"        movb    %%bl, %%cl\n"            /* cl = bits, needs it for shifting */
+"        addb    $32, %%bl\n"             /* bits += 32 */
+"        shlq    %%cl, %%rax\n"
+"        orq     %%rax, %%rdx\n"          /* hold |= *((uint *)in)++ << bits */
+"        jmp     .L_get_length_code_one_time\n"
+
+".align 32,0x90\n"
+".L_while_test:\n"
+"        cmpq    %%rdi, %%r10\n"
+"        jbe     .L_break_loop\n"
+"        cmpq    %%rsi, %%r9\n"
+"        jbe     .L_break_loop\n"
+
+".L_do_loop:\n"
+"        movq    %%r12, %%r8\n"           /* r8 = lmask */
+"        cmpb    $32, %%bl\n"
+"        ja      .L_get_length_code\n"    /* if (32 < bits) */
+
+"        lodsl\n"                         /* eax = *(uint *)in++ */
+"        movb    %%bl, %%cl\n"            /* cl = bits, needs it for shifting */
+"        addb    $32, %%bl\n"             /* bits += 32 */
+"        shlq    %%cl, %%rax\n"
+"        orq     %%rax, %%rdx\n"          /* hold |= *((uint *)in)++ << bits */
+
+".L_get_length_code:\n"
+"        andq    %%rdx, %%r8\n"            /* r8 &= hold */
+"        movl    (%%rbp,%%r8,4), %%eax\n"  /* eax = lcode[hold & lmask] */
+
+"        movb    %%ah, %%cl\n"            /* cl = this.bits */
+"        subb    %%ah, %%bl\n"            /* bits -= this.bits */
+"        shrq    %%cl, %%rdx\n"           /* hold >>= this.bits */
+
+"        testb   %%al, %%al\n"
+"        jnz     .L_test_for_length_base\n" /* if (op != 0) 45.7% */
+
+"        movq    %%r12, %%r8\n"            /* r8 = lmask */
+"        shrl    $16, %%eax\n"            /* output this.val char */
+"        stosb\n"
+
+".L_get_length_code_one_time:\n"
+"        andq    %%rdx, %%r8\n"            /* r8 &= hold */
+"        movl    (%%rbp,%%r8,4), %%eax\n" /* eax = lcode[hold & lmask] */
+
+".L_dolen:\n"
+"        movb    %%ah, %%cl\n"            /* cl = this.bits */
+"        subb    %%ah, %%bl\n"            /* bits -= this.bits */
+"        shrq    %%cl, %%rdx\n"           /* hold >>= this.bits */
+
+"        testb   %%al, %%al\n"
+"        jnz     .L_test_for_length_base\n" /* if (op != 0) 45.7% */
+
+"        shrl    $16, %%eax\n"            /* output this.val char */
+"        stosb\n"
+"        jmp     .L_while_test\n"
+
+".align 32,0x90\n"
+".L_test_for_length_base:\n"
+"        movl    %%eax, %%r14d\n"         /* len = this */
+"        shrl    $16, %%r14d\n"           /* len = this.val */
+"        movb    %%al, %%cl\n"
+
+"        testb   $16, %%al\n"
+"        jz      .L_test_for_second_level_length\n" /* if ((op & 16) == 0) 8% */
+"        andb    $15, %%cl\n"             /* op &= 15 */
+"        jz      .L_decode_distance\n"    /* if (!op) */
+
+".L_add_bits_to_len:\n"
+"        subb    %%cl, %%bl\n"
+"        xorl    %%eax, %%eax\n"
+"        incl    %%eax\n"
+"        shll    %%cl, %%eax\n"
+"        decl    %%eax\n"
+"        andl    %%edx, %%eax\n"          /* eax &= hold */
+"        shrq    %%cl, %%rdx\n"
+"        addl    %%eax, %%r14d\n"         /* len += hold & mask[op] */
+
+".L_decode_distance:\n"
+"        movq    %%r13, %%r8\n"           /* r8 = dmask */
+"        cmpb    $32, %%bl\n"
+"        ja      .L_get_distance_code\n"  /* if (32 < bits) */
+
+"        lodsl\n"                         /* eax = *(uint *)in++ */
+"        movb    %%bl, %%cl\n"            /* cl = bits, needs it for shifting */
+"        addb    $32, %%bl\n"             /* bits += 32 */
+"        shlq    %%cl, %%rax\n"
+"        orq     %%rax, %%rdx\n"          /* hold |= *((uint *)in)++ << bits */
+
+".L_get_distance_code:\n"
+"        andq    %%rdx, %%r8\n"           /* r8 &= hold */
+"        movl    (%%r11,%%r8,4), %%eax\n" /* eax = dcode[hold & dmask] */
+
+".L_dodist:\n"
+"        movl    %%eax, %%r15d\n"         /* dist = this */
+"        shrl    $16, %%r15d\n"           /* dist = this.val */
+"        movb    %%ah, %%cl\n"
+"        subb    %%ah, %%bl\n"            /* bits -= this.bits */
+"        shrq    %%cl, %%rdx\n"           /* hold >>= this.bits */
+"        movb    %%al, %%cl\n"            /* cl = this.op */
+
+"        testb   $16, %%al\n"             /* if ((op & 16) == 0) */
+"        jz      .L_test_for_second_level_dist\n"
+"        andb    $15, %%cl\n"             /* op &= 15 */
+"        jz      .L_check_dist_one\n"
+
+".L_add_bits_to_dist:\n"
+"        subb    %%cl, %%bl\n"
+"        xorl    %%eax, %%eax\n"
+"        incl    %%eax\n"
+"        shll    %%cl, %%eax\n"
+"        decl    %%eax\n"                 /* (1 << op) - 1 */
+"        andl    %%edx, %%eax\n"          /* eax &= hold */
+"        shrq    %%cl, %%rdx\n"
+"        addl    %%eax, %%r15d\n"         /* dist += hold & ((1 << op) - 1) */
+
+".L_check_window:\n"
+"        movq    %%rsi, %%r8\n"           /* save in so from can use it's reg */
+"        movq    %%rdi, %%rax\n"
+"        subq    40(%%rsp), %%rax\n"      /* nbytes = out - beg */
+
+"        cmpl    %%r15d, %%eax\n"
+"        jb      .L_clip_window\n"        /* if (dist > nbytes) 4.2% */
+
+"        movl    %%r14d, %%ecx\n"         /* ecx = len */
+"        movq    %%rdi, %%rsi\n"
+"        subq    %%r15, %%rsi\n"          /* from = out - dist */
+
+"        sarl    %%ecx\n"
+"        jnc     .L_copy_two\n"           /* if len % 2 == 0 */
+
+"        rep     movsw\n"
+"        movb    (%%rsi), %%al\n"
+"        movb    %%al, (%%rdi)\n"
+"        incq    %%rdi\n"
+
+"        movq    %%r8, %%rsi\n"           /* move in back to %rsi, toss from */
+"        jmp     .L_while_test\n"
+
+".L_copy_two:\n"
+"        rep     movsw\n"
+"        movq    %%r8, %%rsi\n"           /* move in back to %rsi, toss from */
+"        jmp     .L_while_test\n"
+
+".align 32,0x90\n"
+".L_check_dist_one:\n"
+"        cmpl    $1, %%r15d\n"            /* if dist 1, is a memset */
+"        jne     .L_check_window\n"
+"        cmpq    %%rdi, 40(%%rsp)\n"      /* if out == beg, outside window */
+"        je      .L_check_window\n"
+
+"        movl    %%r14d, %%ecx\n"         /* ecx = len */
+"        movb    -1(%%rdi), %%al\n"
+"        movb    %%al, %%ah\n"
+
+"        sarl    %%ecx\n"
+"        jnc     .L_set_two\n"
+"        movb    %%al, (%%rdi)\n"
+"        incq    %%rdi\n"
+
+".L_set_two:\n"
+"        rep     stosw\n"
+"        jmp     .L_while_test\n"
+
+".align 32,0x90\n"
+".L_test_for_second_level_length:\n"
+"        testb   $64, %%al\n"
+"        jnz     .L_test_for_end_of_block\n" /* if ((op & 64) != 0) */
+
+"        xorl    %%eax, %%eax\n"
+"        incl    %%eax\n"
+"        shll    %%cl, %%eax\n"
+"        decl    %%eax\n"
+"        andl    %%edx, %%eax\n"         /* eax &= hold */
+"        addl    %%r14d, %%eax\n"        /* eax += len */
+"        movl    (%%rbp,%%rax,4), %%eax\n" /* eax = lcode[val+(hold&mask[op])]*/
+"        jmp     .L_dolen\n"
+
+".align 32,0x90\n"
+".L_test_for_second_level_dist:\n"
+"        testb   $64, %%al\n"
+"        jnz     .L_invalid_distance_code\n" /* if ((op & 64) != 0) */
+
+"        xorl    %%eax, %%eax\n"
+"        incl    %%eax\n"
+"        shll    %%cl, %%eax\n"
+"        decl    %%eax\n"
+"        andl    %%edx, %%eax\n"         /* eax &= hold */
+"        addl    %%r15d, %%eax\n"        /* eax += dist */
+"        movl    (%%r11,%%rax,4), %%eax\n" /* eax = dcode[val+(hold&mask[op])]*/
+"        jmp     .L_dodist\n"
+
+".align 32,0x90\n"
+".L_clip_window:\n"
+"        movl    %%eax, %%ecx\n"         /* ecx = nbytes */
+"        movl    92(%%rsp), %%eax\n"     /* eax = wsize, prepare for dist cmp */
+"        negl    %%ecx\n"                /* nbytes = -nbytes */
+
+"        cmpl    %%r15d, %%eax\n"
+"        jb      .L_invalid_distance_too_far\n" /* if (dist > wsize) */
+
+"        addl    %%r15d, %%ecx\n"         /* nbytes = dist - nbytes */
+"        cmpl    $0, 96(%%rsp)\n"
+"        jne     .L_wrap_around_window\n" /* if (write != 0) */
+
+"        movq    56(%%rsp), %%rsi\n"     /* from  = window */
+"        subl    %%ecx, %%eax\n"         /* eax  -= nbytes */
+"        addq    %%rax, %%rsi\n"         /* from += wsize - nbytes */
+
+"        movl    %%r14d, %%eax\n"        /* eax = len */
+"        cmpl    %%ecx, %%r14d\n"
+"        jbe     .L_do_copy\n"           /* if (nbytes >= len) */
+
+"        subl    %%ecx, %%eax\n"         /* eax -= nbytes */
+"        rep     movsb\n"
+"        movq    %%rdi, %%rsi\n"
+"        subq    %%r15, %%rsi\n"         /* from = &out[ -dist ] */
+"        jmp     .L_do_copy\n"
+
+".align 32,0x90\n"
+".L_wrap_around_window:\n"
+"        movl    96(%%rsp), %%eax\n"     /* eax = write */
+"        cmpl    %%eax, %%ecx\n"
+"        jbe     .L_contiguous_in_window\n" /* if (write >= nbytes) */
+
+"        movl    92(%%rsp), %%esi\n"     /* from  = wsize */
+"        addq    56(%%rsp), %%rsi\n"     /* from += window */
+"        addq    %%rax, %%rsi\n"         /* from += write */
+"        subq    %%rcx, %%rsi\n"         /* from -= nbytes */
+"        subl    %%eax, %%ecx\n"         /* nbytes -= write */
+
+"        movl    %%r14d, %%eax\n"        /* eax = len */
+"        cmpl    %%ecx, %%eax\n"
+"        jbe     .L_do_copy\n"           /* if (nbytes >= len) */
+
+"        subl    %%ecx, %%eax\n"         /* len -= nbytes */
+"        rep     movsb\n"
+"        movq    56(%%rsp), %%rsi\n"     /* from = window */
+"        movl    96(%%rsp), %%ecx\n"     /* nbytes = write */
+"        cmpl    %%ecx, %%eax\n"
+"        jbe     .L_do_copy\n"           /* if (nbytes >= len) */
+
+"        subl    %%ecx, %%eax\n"         /* len -= nbytes */
+"        rep     movsb\n"
+"        movq    %%rdi, %%rsi\n"
+"        subq    %%r15, %%rsi\n"         /* from = out - dist */
+"        jmp     .L_do_copy\n"
+
+".align 32,0x90\n"
+".L_contiguous_in_window:\n"
+"        movq    56(%%rsp), %%rsi\n"     /* rsi = window */
+"        addq    %%rax, %%rsi\n"
+"        subq    %%rcx, %%rsi\n"         /* from += write - nbytes */
+
+"        movl    %%r14d, %%eax\n"        /* eax = len */
+"        cmpl    %%ecx, %%eax\n"
+"        jbe     .L_do_copy\n"           /* if (nbytes >= len) */
+
+"        subl    %%ecx, %%eax\n"         /* len -= nbytes */
+"        rep     movsb\n"
+"        movq    %%rdi, %%rsi\n"
+"        subq    %%r15, %%rsi\n"         /* from = out - dist */
+"        jmp     .L_do_copy\n"           /* if (nbytes >= len) */
+
+".align 32,0x90\n"
+".L_do_copy:\n"
+"        movl    %%eax, %%ecx\n"         /* ecx = len */
+"        rep     movsb\n"
+
+"        movq    %%r8, %%rsi\n"          /* move in back to %esi, toss from */
+"        jmp     .L_while_test\n"
+
+".L_test_for_end_of_block:\n"
+"        testb   $32, %%al\n"
+"        jz      .L_invalid_literal_length_code\n"
+"        movl    $1, 116(%%rsp)\n"
+"        jmp     .L_break_loop_with_status\n"
+
+".L_invalid_literal_length_code:\n"
+"        movl    $2, 116(%%rsp)\n"
+"        jmp     .L_break_loop_with_status\n"
+
+".L_invalid_distance_code:\n"
+"        movl    $3, 116(%%rsp)\n"
+"        jmp     .L_break_loop_with_status\n"
+
+".L_invalid_distance_too_far:\n"
+"        movl    $4, 116(%%rsp)\n"
+"        jmp     .L_break_loop_with_status\n"
+
+".L_break_loop:\n"
+"        movl    $0, 116(%%rsp)\n"
+
+".L_break_loop_with_status:\n"
+/* put in, out, bits, and hold back into ar and pop esp */
+"        movq    %%rsi, 16(%%rsp)\n"     /* in */
+"        movq    %%rdi, 32(%%rsp)\n"     /* out */
+"        movl    %%ebx, 88(%%rsp)\n"     /* bits */
+"        movq    %%rdx, 80(%%rsp)\n"     /* hold */
+"        movq    (%%rsp), %%rax\n"       /* restore rbp and rsp */
+"        movq    8(%%rsp), %%rbp\n"
+"        movq    %%rax, %%rsp\n"
+          :
+          : "m" (ar)
+          : "memory", "%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi",
+            "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15"
+    );
+#elif ( defined( __GNUC__ ) || defined( __ICC ) ) && defined( __i386 )
+    __asm__ __volatile__ (
+"        leal    %0, %%eax\n"
+"        movl    %%esp, (%%eax)\n"        /* save esp, ebp */
+"        movl    %%ebp, 4(%%eax)\n"
+"        movl    %%eax, %%esp\n"
+"        movl    8(%%esp), %%esi\n"       /* esi = in */
+"        movl    16(%%esp), %%edi\n"      /* edi = out */
+"        movl    40(%%esp), %%edx\n"      /* edx = hold */
+"        movl    44(%%esp), %%ebx\n"      /* ebx = bits */
+"        movl    32(%%esp), %%ebp\n"      /* ebp = lcode */
+
+"        cld\n"
+"        jmp     .L_do_loop\n"
+
+".align 32,0x90\n"
+".L_while_test:\n"
+"        cmpl    %%edi, 24(%%esp)\n"      /* out < end */
+"        jbe     .L_break_loop\n"
+"        cmpl    %%esi, 12(%%esp)\n"      /* in < last */
+"        jbe     .L_break_loop\n"
+
+".L_do_loop:\n"
+"        cmpb    $15, %%bl\n"
+"        ja      .L_get_length_code\n"    /* if (15 < bits) */
+
+"        xorl    %%eax, %%eax\n"
+"        lodsw\n"                         /* al = *(ushort *)in++ */
+"        movb    %%bl, %%cl\n"            /* cl = bits, needs it for shifting */
+"        addb    $16, %%bl\n"             /* bits += 16 */
+"        shll    %%cl, %%eax\n"
+"        orl     %%eax, %%edx\n"        /* hold |= *((ushort *)in)++ << bits */
+
+".L_get_length_code:\n"
+"        movl    56(%%esp), %%eax\n"      /* eax = lmask */
+"        andl    %%edx, %%eax\n"          /* eax &= hold */
+"        movl    (%%ebp,%%eax,4), %%eax\n" /* eax = lcode[hold & lmask] */
+
+".L_dolen:\n"
+"        movb    %%ah, %%cl\n"            /* cl = this.bits */
+"        subb    %%ah, %%bl\n"            /* bits -= this.bits */
+"        shrl    %%cl, %%edx\n"           /* hold >>= this.bits */
+
+"        testb   %%al, %%al\n"
+"        jnz     .L_test_for_length_base\n" /* if (op != 0) 45.7% */
+
+"        shrl    $16, %%eax\n"            /* output this.val char */
+"        stosb\n"
+"        jmp     .L_while_test\n"
+
+".align 32,0x90\n"
+".L_test_for_length_base:\n"
+"        movl    %%eax, %%ecx\n"          /* len = this */
+"        shrl    $16, %%ecx\n"            /* len = this.val */
+"        movl    %%ecx, 64(%%esp)\n"      /* save len */
+"        movb    %%al, %%cl\n"
+
+"        testb   $16, %%al\n"
+"        jz      .L_test_for_second_level_length\n" /* if ((op & 16) == 0) 8% */
+"        andb    $15, %%cl\n"             /* op &= 15 */
+"        jz      .L_decode_distance\n"    /* if (!op) */
+"        cmpb    %%cl, %%bl\n"
+"        jae     .L_add_bits_to_len\n"    /* if (op <= bits) */
+
+"        movb    %%cl, %%ch\n"            /* stash op in ch, freeing cl */
+"        xorl    %%eax, %%eax\n"
+"        lodsw\n"                         /* al = *(ushort *)in++ */
+"        movb    %%bl, %%cl\n"            /* cl = bits, needs it for shifting */
+"        addb    $16, %%bl\n"             /* bits += 16 */
+"        shll    %%cl, %%eax\n"
+"        orl     %%eax, %%edx\n"         /* hold |= *((ushort *)in)++ << bits */
+"        movb    %%ch, %%cl\n"            /* move op back to ecx */
+
+".L_add_bits_to_len:\n"
+"        subb    %%cl, %%bl\n"
+"        xorl    %%eax, %%eax\n"
+"        incl    %%eax\n"
+"        shll    %%cl, %%eax\n"
+"        decl    %%eax\n"
+"        andl    %%edx, %%eax\n"          /* eax &= hold */
+"        shrl    %%cl, %%edx\n"
+"        addl    %%eax, 64(%%esp)\n"      /* len += hold & mask[op] */
+
+".L_decode_distance:\n"
+"        cmpb    $15, %%bl\n"
+"        ja      .L_get_distance_code\n"  /* if (15 < bits) */
+
+"        xorl    %%eax, %%eax\n"
+"        lodsw\n"                         /* al = *(ushort *)in++ */
+"        movb    %%bl, %%cl\n"            /* cl = bits, needs it for shifting */
+"        addb    $16, %%bl\n"             /* bits += 16 */
+"        shll    %%cl, %%eax\n"
+"        orl     %%eax, %%edx\n"         /* hold |= *((ushort *)in)++ << bits */
+
+".L_get_distance_code:\n"
+"        movl    60(%%esp), %%eax\n"      /* eax = dmask */
+"        movl    36(%%esp), %%ecx\n"      /* ecx = dcode */
+"        andl    %%edx, %%eax\n"          /* eax &= hold */
+"        movl    (%%ecx,%%eax,4), %%eax\n"/* eax = dcode[hold & dmask] */
+
+".L_dodist:\n"
+"        movl    %%eax, %%ebp\n"          /* dist = this */
+"        shrl    $16, %%ebp\n"            /* dist = this.val */
+"        movb    %%ah, %%cl\n"
+"        subb    %%ah, %%bl\n"            /* bits -= this.bits */
+"        shrl    %%cl, %%edx\n"           /* hold >>= this.bits */
+"        movb    %%al, %%cl\n"            /* cl = this.op */
+
+"        testb   $16, %%al\n"             /* if ((op & 16) == 0) */
+"        jz      .L_test_for_second_level_dist\n"
+"        andb    $15, %%cl\n"             /* op &= 15 */
+"        jz      .L_check_dist_one\n"
+"        cmpb    %%cl, %%bl\n"
+"        jae     .L_add_bits_to_dist\n"   /* if (op <= bits) 97.6% */
+
+"        movb    %%cl, %%ch\n"            /* stash op in ch, freeing cl */
+"        xorl    %%eax, %%eax\n"
+"        lodsw\n"                         /* al = *(ushort *)in++ */
+"        movb    %%bl, %%cl\n"            /* cl = bits, needs it for shifting */
+"        addb    $16, %%bl\n"             /* bits += 16 */
+"        shll    %%cl, %%eax\n"
+"        orl     %%eax, %%edx\n"        /* hold |= *((ushort *)in)++ << bits */
+"        movb    %%ch, %%cl\n"            /* move op back to ecx */
+
+".L_add_bits_to_dist:\n"
+"        subb    %%cl, %%bl\n"
+"        xorl    %%eax, %%eax\n"
+"        incl    %%eax\n"
+"        shll    %%cl, %%eax\n"
+"        decl    %%eax\n"                 /* (1 << op) - 1 */
+"        andl    %%edx, %%eax\n"          /* eax &= hold */
+"        shrl    %%cl, %%edx\n"
+"        addl    %%eax, %%ebp\n"          /* dist += hold & ((1 << op) - 1) */
+
+".L_check_window:\n"
+"        movl    %%esi, 8(%%esp)\n"       /* save in so from can use it's reg */
+"        movl    %%edi, %%eax\n"
+"        subl    20(%%esp), %%eax\n"      /* nbytes = out - beg */
+
+"        cmpl    %%ebp, %%eax\n"
+"        jb      .L_clip_window\n"        /* if (dist > nbytes) 4.2% */
+
+"        movl    64(%%esp), %%ecx\n"      /* ecx = len */
+"        movl    %%edi, %%esi\n"
+"        subl    %%ebp, %%esi\n"          /* from = out - dist */
+
+"        sarl    %%ecx\n"
+"        jnc     .L_copy_two\n"           /* if len % 2 == 0 */
+
+"        rep     movsw\n"
+"        movb    (%%esi), %%al\n"
+"        movb    %%al, (%%edi)\n"
+"        incl    %%edi\n"
+
+"        movl    8(%%esp), %%esi\n"       /* move in back to %esi, toss from */
+"        movl    32(%%esp), %%ebp\n"      /* ebp = lcode */
+"        jmp     .L_while_test\n"
+
+".L_copy_two:\n"
+"        rep     movsw\n"
+"        movl    8(%%esp), %%esi\n"       /* move in back to %esi, toss from */
+"        movl    32(%%esp), %%ebp\n"      /* ebp = lcode */
+"        jmp     .L_while_test\n"
+
+".align 32,0x90\n"
+".L_check_dist_one:\n"
+"        cmpl    $1, %%ebp\n"            /* if dist 1, is a memset */
+"        jne     .L_check_window\n"
+"        cmpl    %%edi, 20(%%esp)\n"
+"        je      .L_check_window\n"      /* out == beg, if outside window */
+
+"        movl    64(%%esp), %%ecx\n"      /* ecx = len */
+"        movb    -1(%%edi), %%al\n"
+"        movb    %%al, %%ah\n"
+
+"        sarl    %%ecx\n"
+"        jnc     .L_set_two\n"
+"        movb    %%al, (%%edi)\n"
+"        incl    %%edi\n"
+
+".L_set_two:\n"
+"        rep     stosw\n"
+"        movl    32(%%esp), %%ebp\n"      /* ebp = lcode */
+"        jmp     .L_while_test\n"
+
+".align 32,0x90\n"
+".L_test_for_second_level_length:\n"
+"        testb   $64, %%al\n"
+"        jnz     .L_test_for_end_of_block\n" /* if ((op & 64) != 0) */
+
+"        xorl    %%eax, %%eax\n"
+"        incl    %%eax\n"
+"        shll    %%cl, %%eax\n"
+"        decl    %%eax\n"
+"        andl    %%edx, %%eax\n"         /* eax &= hold */
+"        addl    64(%%esp), %%eax\n"     /* eax += len */
+"        movl    (%%ebp,%%eax,4), %%eax\n" /* eax = lcode[val+(hold&mask[op])]*/
+"        jmp     .L_dolen\n"
+
+".align 32,0x90\n"
+".L_test_for_second_level_dist:\n"
+"        testb   $64, %%al\n"
+"        jnz     .L_invalid_distance_code\n" /* if ((op & 64) != 0) */
+
+"        xorl    %%eax, %%eax\n"
+"        incl    %%eax\n"
+"        shll    %%cl, %%eax\n"
+"        decl    %%eax\n"
+"        andl    %%edx, %%eax\n"         /* eax &= hold */
+"        addl    %%ebp, %%eax\n"         /* eax += dist */
+"        movl    36(%%esp), %%ecx\n"     /* ecx = dcode */
+"        movl    (%%ecx,%%eax,4), %%eax\n" /* eax = dcode[val+(hold&mask[op])]*/
+"        jmp     .L_dodist\n"
+
+".align 32,0x90\n"
+".L_clip_window:\n"
+"        movl    %%eax, %%ecx\n"
+"        movl    48(%%esp), %%eax\n"     /* eax = wsize */
+"        negl    %%ecx\n"                /* nbytes = -nbytes */
+"        movl    28(%%esp), %%esi\n"     /* from = window */
+
+"        cmpl    %%ebp, %%eax\n"
+"        jb      .L_invalid_distance_too_far\n" /* if (dist > wsize) */
+
+"        addl    %%ebp, %%ecx\n"         /* nbytes = dist - nbytes */
+"        cmpl    $0, 52(%%esp)\n"
+"        jne     .L_wrap_around_window\n" /* if (write != 0) */
+
+"        subl    %%ecx, %%eax\n"
+"        addl    %%eax, %%esi\n"         /* from += wsize - nbytes */
+
+"        movl    64(%%esp), %%eax\n"     /* eax = len */
+"        cmpl    %%ecx, %%eax\n"
+"        jbe     .L_do_copy\n"           /* if (nbytes >= len) */
+
+"        subl    %%ecx, %%eax\n"         /* len -= nbytes */
+"        rep     movsb\n"
+"        movl    %%edi, %%esi\n"
+"        subl    %%ebp, %%esi\n"         /* from = out - dist */
+"        jmp     .L_do_copy\n"
+
+".align 32,0x90\n"
+".L_wrap_around_window:\n"
+"        movl    52(%%esp), %%eax\n"     /* eax = write */
+"        cmpl    %%eax, %%ecx\n"
+"        jbe     .L_contiguous_in_window\n" /* if (write >= nbytes) */
+
+"        addl    48(%%esp), %%esi\n"     /* from += wsize */
+"        addl    %%eax, %%esi\n"         /* from += write */
+"        subl    %%ecx, %%esi\n"         /* from -= nbytes */
+"        subl    %%eax, %%ecx\n"         /* nbytes -= write */
+
+"        movl    64(%%esp), %%eax\n"     /* eax = len */
+"        cmpl    %%ecx, %%eax\n"
+"        jbe     .L_do_copy\n"           /* if (nbytes >= len) */
+
+"        subl    %%ecx, %%eax\n"         /* len -= nbytes */
+"        rep     movsb\n"
+"        movl    28(%%esp), %%esi\n"     /* from = window */
+"        movl    52(%%esp), %%ecx\n"     /* nbytes = write */
+"        cmpl    %%ecx, %%eax\n"
+"        jbe     .L_do_copy\n"           /* if (nbytes >= len) */
+
+"        subl    %%ecx, %%eax\n"         /* len -= nbytes */
+"        rep     movsb\n"
+"        movl    %%edi, %%esi\n"
+"        subl    %%ebp, %%esi\n"         /* from = out - dist */
+"        jmp     .L_do_copy\n"
+
+".align 32,0x90\n"
+".L_contiguous_in_window:\n"
+"        addl    %%eax, %%esi\n"
+"        subl    %%ecx, %%esi\n"         /* from += write - nbytes */
+
+"        movl    64(%%esp), %%eax\n"     /* eax = len */
+"        cmpl    %%ecx, %%eax\n"
+"        jbe     .L_do_copy\n"           /* if (nbytes >= len) */
+
+"        subl    %%ecx, %%eax\n"         /* len -= nbytes */
+"        rep     movsb\n"
+"        movl    %%edi, %%esi\n"
+"        subl    %%ebp, %%esi\n"         /* from = out - dist */
+"        jmp     .L_do_copy\n"           /* if (nbytes >= len) */
+
+".align 32,0x90\n"
+".L_do_copy:\n"
+"        movl    %%eax, %%ecx\n"
+"        rep     movsb\n"
+
+"        movl    8(%%esp), %%esi\n"      /* move in back to %esi, toss from */
+"        movl    32(%%esp), %%ebp\n"     /* ebp = lcode */
+"        jmp     .L_while_test\n"
+
+".L_test_for_end_of_block:\n"
+"        testb   $32, %%al\n"
+"        jz      .L_invalid_literal_length_code\n"
+"        movl    $1, 72(%%esp)\n"
+"        jmp     .L_break_loop_with_status\n"
+
+".L_invalid_literal_length_code:\n"
+"        movl    $2, 72(%%esp)\n"
+"        jmp     .L_break_loop_with_status\n"
+
+".L_invalid_distance_code:\n"
+"        movl    $3, 72(%%esp)\n"
+"        jmp     .L_break_loop_with_status\n"
+
+".L_invalid_distance_too_far:\n"
+"        movl    8(%%esp), %%esi\n"
+"        movl    $4, 72(%%esp)\n"
+"        jmp     .L_break_loop_with_status\n"
+
+".L_break_loop:\n"
+"        movl    $0, 72(%%esp)\n"
+
+".L_break_loop_with_status:\n"
+/* put in, out, bits, and hold back into ar and pop esp */
+"        movl    %%esi, 8(%%esp)\n"      /* save in */
+"        movl    %%edi, 16(%%esp)\n"     /* save out */
+"        movl    %%ebx, 44(%%esp)\n"     /* save bits */
+"        movl    %%edx, 40(%%esp)\n"     /* save hold */
+"        movl    4(%%esp), %%ebp\n"      /* restore esp, ebp */
+"        movl    (%%esp), %%esp\n"
+          :
+          : "m" (ar)
+          : "memory", "%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi"
+    );
+#elif defined( _MSC_VER ) && ! defined( _M_AMD64 )
+    __asm {
+	lea	eax, ar
+	mov	[eax], esp         /* save esp, ebp */
+	mov	[eax+4], ebp
+	mov	esp, eax
+	mov	esi, [esp+8]       /* esi = in */
+	mov	edi, [esp+16]      /* edi = out */
+	mov	edx, [esp+40]      /* edx = hold */
+	mov	ebx, [esp+44]      /* ebx = bits */
+	mov	ebp, [esp+32]      /* ebp = lcode */
+
+	cld
+	jmp	L_do_loop
+
+ALIGN 4
+L_while_test:
+	cmp	[esp+24], edi
+	jbe	L_break_loop
+	cmp	[esp+12], esi
+	jbe	L_break_loop
+
+L_do_loop:
+	cmp	bl, 15
+	ja	L_get_length_code    /* if (15 < bits) */
+
+	xor	eax, eax
+	lodsw                         /* al = *(ushort *)in++ */
+	mov	cl, bl            /* cl = bits, needs it for shifting */
+	add	bl, 16             /* bits += 16 */
+	shl	eax, cl
+	or	edx, eax        /* hold |= *((ushort *)in)++ << bits */
+
+L_get_length_code:
+	mov	eax, [esp+56]      /* eax = lmask */
+	and	eax, edx          /* eax &= hold */
+	mov	eax, [ebp+eax*4] /* eax = lcode[hold & lmask] */
+
+L_dolen:
+	mov	cl, ah            /* cl = this.bits */
+	sub	bl, ah            /* bits -= this.bits */
+	shr	edx, cl           /* hold >>= this.bits */
+
+	test	al, al
+	jnz	L_test_for_length_base /* if (op != 0) 45.7% */
+
+	shr	eax, 16            /* output this.val char */
+	stosb
+	jmp	L_while_test
+
+ALIGN 4
+L_test_for_length_base:
+	mov	ecx, eax          /* len = this */
+	shr	ecx, 16            /* len = this.val */
+	mov	[esp+64], ecx      /* save len */
+	mov	cl, al
+
+	test	al, 16
+	jz	L_test_for_second_level_length /* if ((op & 16) == 0) 8% */
+	and	cl, 15             /* op &= 15 */
+	jz	L_decode_distance    /* if (!op) */
+	cmp	bl, cl
+	jae	L_add_bits_to_len    /* if (op <= bits) */
+
+	mov	ch, cl            /* stash op in ch, freeing cl */
+	xor	eax, eax
+	lodsw                         /* al = *(ushort *)in++ */
+	mov	cl, bl            /* cl = bits, needs it for shifting */
+	add	bl, 16             /* bits += 16 */
+	shl	eax, cl
+	or	edx, eax         /* hold |= *((ushort *)in)++ << bits */
+	mov	cl, ch            /* move op back to ecx */
+
+L_add_bits_to_len:
+	sub	bl, cl
+	xor	eax, eax
+	inc	eax
+	shl	eax, cl
+	dec	eax
+	and	eax, edx          /* eax &= hold */
+	shr	edx, cl
+	add	[esp+64], eax      /* len += hold & mask[op] */
+
+L_decode_distance:
+	cmp	bl, 15
+	ja	L_get_distance_code  /* if (15 < bits) */
+
+	xor	eax, eax
+	lodsw                         /* al = *(ushort *)in++ */
+	mov	cl, bl            /* cl = bits, needs it for shifting */
+	add	bl, 16             /* bits += 16 */
+	shl	eax, cl
+	or	edx, eax         /* hold |= *((ushort *)in)++ << bits */
+
+L_get_distance_code:
+	mov	eax, [esp+60]      /* eax = dmask */
+	mov	ecx, [esp+36]      /* ecx = dcode */
+	and	eax, edx          /* eax &= hold */
+	mov	eax, [ecx+eax*4]/* eax = dcode[hold & dmask] */
+
+L_dodist:
+	mov	ebp, eax          /* dist = this */
+	shr	ebp, 16            /* dist = this.val */
+	mov	cl, ah
+	sub	bl, ah            /* bits -= this.bits */
+	shr	edx, cl           /* hold >>= this.bits */
+	mov	cl, al            /* cl = this.op */
+
+	test	al, 16             /* if ((op & 16) == 0) */
+	jz	L_test_for_second_level_dist
+	and	cl, 15             /* op &= 15 */
+	jz	L_check_dist_one
+	cmp	bl, cl
+	jae	L_add_bits_to_dist   /* if (op <= bits) 97.6% */
+
+	mov	ch, cl            /* stash op in ch, freeing cl */
+	xor	eax, eax
+	lodsw                         /* al = *(ushort *)in++ */
+	mov	cl, bl            /* cl = bits, needs it for shifting */
+	add	bl, 16             /* bits += 16 */
+	shl	eax, cl
+	or	edx, eax        /* hold |= *((ushort *)in)++ << bits */
+	mov	cl, ch            /* move op back to ecx */
+
+L_add_bits_to_dist:
+	sub	bl, cl
+	xor	eax, eax
+	inc	eax
+	shl	eax, cl
+	dec	eax                 /* (1 << op) - 1 */
+	and	eax, edx          /* eax &= hold */
+	shr	edx, cl
+	add	ebp, eax          /* dist += hold & ((1 << op) - 1) */
+
+L_check_window:
+	mov	[esp+8], esi       /* save in so from can use it's reg */
+	mov	eax, edi
+	sub	eax, [esp+20]      /* nbytes = out - beg */
+
+	cmp	eax, ebp
+	jb	L_clip_window        /* if (dist > nbytes) 4.2% */
+
+	mov	ecx, [esp+64]      /* ecx = len */
+	mov	esi, edi
+	sub	esi, ebp          /* from = out - dist */
+
+	sar	ecx, 1
+	jnc	L_copy_two
+
+	rep     movsw
+	mov	al, [esi]
+	mov	[edi], al
+	inc	edi
+
+	mov	esi, [esp+8]      /* move in back to %esi, toss from */
+	mov	ebp, [esp+32]     /* ebp = lcode */
+	jmp	L_while_test
+
+L_copy_two:
+	rep     movsw
+	mov	esi, [esp+8]      /* move in back to %esi, toss from */
+	mov	ebp, [esp+32]     /* ebp = lcode */
+	jmp	L_while_test
+
+ALIGN 4
+L_check_dist_one:
+	cmp	ebp, 1            /* if dist 1, is a memset */
+	jne	L_check_window
+	cmp	[esp+20], edi
+	je	L_check_window    /* out == beg, if outside window */
+
+	mov	ecx, [esp+64]     /* ecx = len */
+	mov	al, [edi-1]
+	mov	ah, al
+
+	sar	ecx, 1
+	jnc	L_set_two
+	mov	[edi], al         /* memset out with from[-1] */
+	inc	edi
+
+L_set_two:
+	rep     stosw
+	mov	ebp, [esp+32]     /* ebp = lcode */
+	jmp	L_while_test
+
+ALIGN 4
+L_test_for_second_level_length:
+	test	al, 64
+	jnz	L_test_for_end_of_block /* if ((op & 64) != 0) */
+
+	xor	eax, eax
+	inc	eax
+	shl	eax, cl
+	dec	eax
+	and	eax, edx         /* eax &= hold */
+	add	eax, [esp+64]     /* eax += len */
+	mov	eax, [ebp+eax*4] /* eax = lcode[val+(hold&mask[op])]*/
+	jmp	L_dolen
+
+ALIGN 4
+L_test_for_second_level_dist:
+	test	al, 64
+	jnz	L_invalid_distance_code /* if ((op & 64) != 0) */
+
+	xor	eax, eax
+	inc	eax
+	shl	eax, cl
+	dec	eax
+	and	eax, edx         /* eax &= hold */
+	add	eax, ebp         /* eax += dist */
+	mov	ecx, [esp+36]     /* ecx = dcode */
+	mov	eax, [ecx+eax*4] /* eax = dcode[val+(hold&mask[op])]*/
+	jmp	L_dodist
+
+ALIGN 4
+L_clip_window:
+	mov	ecx, eax
+	mov	eax, [esp+48]     /* eax = wsize */
+	neg	ecx                /* nbytes = -nbytes */
+	mov	esi, [esp+28]     /* from = window */
+
+	cmp	eax, ebp
+	jb	L_invalid_distance_too_far /* if (dist > wsize) */
+
+	add	ecx, ebp         /* nbytes = dist - nbytes */
+	cmp	dword ptr [esp+52], 0
+	jne	L_wrap_around_window /* if (write != 0) */
+
+	sub	eax, ecx
+	add	esi, eax         /* from += wsize - nbytes */
+
+	mov	eax, [esp+64]    /* eax = len */
+	cmp	eax, ecx
+	jbe	L_do_copy          /* if (nbytes >= len) */
+
+	sub	eax, ecx         /* len -= nbytes */
+	rep     movsb
+	mov	esi, edi
+	sub	esi, ebp         /* from = out - dist */
+	jmp	L_do_copy
+
+ALIGN 4
+L_wrap_around_window:
+	mov	eax, [esp+52]    /* eax = write */
+	cmp	ecx, eax
+	jbe	L_contiguous_in_window /* if (write >= nbytes) */
+
+	add	esi, [esp+48]    /* from += wsize */
+	add	esi, eax         /* from += write */
+	sub	esi, ecx         /* from -= nbytes */
+	sub	ecx, eax         /* nbytes -= write */
+
+	mov	eax, [esp+64]    /* eax = len */
+	cmp	eax, ecx
+	jbe	L_do_copy          /* if (nbytes >= len) */
+
+	sub	eax, ecx         /* len -= nbytes */
+	rep     movsb
+	mov	esi, [esp+28]     /* from = window */
+	mov	ecx, [esp+52]     /* nbytes = write */
+	cmp	eax, ecx
+	jbe	L_do_copy          /* if (nbytes >= len) */
+
+	sub	eax, ecx         /* len -= nbytes */
+	rep     movsb
+	mov	esi, edi
+	sub	esi, ebp         /* from = out - dist */
+	jmp	L_do_copy
+
+ALIGN 4
+L_contiguous_in_window:
+	add	esi, eax
+	sub	esi, ecx         /* from += write - nbytes */
+
+	mov	eax, [esp+64]    /* eax = len */
+	cmp	eax, ecx
+	jbe	L_do_copy          /* if (nbytes >= len) */
+
+	sub	eax, ecx         /* len -= nbytes */
+	rep     movsb
+	mov	esi, edi
+	sub	esi, ebp         /* from = out - dist */
+	jmp	L_do_copy
+
+ALIGN 4
+L_do_copy:
+	mov	ecx, eax
+	rep     movsb
+
+	mov	esi, [esp+8]      /* move in back to %esi, toss from */
+	mov	ebp, [esp+32]     /* ebp = lcode */
+	jmp	L_while_test
+
+L_test_for_end_of_block:
+	test	al, 32
+	jz	L_invalid_literal_length_code
+	mov	dword ptr [esp+72], 1
+	jmp	L_break_loop_with_status
+
+L_invalid_literal_length_code:
+	mov	dword ptr [esp+72], 2
+	jmp	L_break_loop_with_status
+
+L_invalid_distance_code:
+	mov	dword ptr [esp+72], 3
+	jmp	L_break_loop_with_status
+
+L_invalid_distance_too_far:
+	mov	esi, [esp+4]
+	mov	dword ptr [esp+72], 4
+	jmp	L_break_loop_with_status
+
+L_break_loop:
+	mov	dword ptr [esp+72], 0
+
+L_break_loop_with_status:
+/* put in, out, bits, and hold back into ar and pop esp */
+	mov	[esp+8], esi     /* save in */
+	mov	[esp+16], edi    /* save out */
+	mov	[esp+44], ebx    /* save bits */
+	mov	[esp+40], edx    /* save hold */
+	mov	ebp, [esp+4]     /* restore esp, ebp */
+	mov	esp, [esp]
+    }
+#else
+#error "x86 architecture not defined"
+#endif
+
+    if (ar.status > 1) {
+        if (ar.status == 2)
+            strm->msg = "invalid literal/length code";
+        else if (ar.status == 3)
+            strm->msg = "invalid distance code";
+        else
+            strm->msg = "invalid distance too far back";
+        state->mode = BAD;
+    }
+    else if ( ar.status == 1 ) {
+        state->mode = TYPE;
+    }
+
+    /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
+    ar.len = ar.bits >> 3;
+    ar.in -= ar.len;
+    ar.bits -= ar.len << 3;
+    ar.hold &= (1U << ar.bits) - 1;
+
+    /* update state and return */
+    strm->next_in = ar.in;
+    strm->next_out = ar.out;
+    strm->avail_in = (unsigned)(ar.in < ar.last ?
+                                PAD_AVAIL_IN + (ar.last - ar.in) :
+                                PAD_AVAIL_IN - (ar.in - ar.last));
+    strm->avail_out = (unsigned)(ar.out < ar.end ?
+                                 PAD_AVAIL_OUT + (ar.end - ar.out) :
+                                 PAD_AVAIL_OUT - (ar.out - ar.end));
+    state->hold = ar.hold;
+    state->bits = ar.bits;
+    return;
+}
+
diff --git a/cpukit/zlib/contrib/inflate86/inffast.S b/cpukit/zlib/contrib/inflate86/inffast.S
new file mode 100644
index 0000000000..2245a2905b
--- /dev/null
+++ b/cpukit/zlib/contrib/inflate86/inffast.S
@@ -0,0 +1,1368 @@
+/*
+ * inffast.S is a hand tuned assembler version of:
+ *
+ * inffast.c -- fast decoding
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Copyright (C) 2003 Chris Anderson <christop@charm.net>
+ * Please use the copyright conditions above.
+ *
+ * This version (Jan-23-2003) of inflate_fast was coded and tested under
+ * GNU/Linux on a pentium 3, using the gcc-3.2 compiler distribution.  On that
+ * machine, I found that gzip style archives decompressed about 20% faster than
+ * the gcc-3.2 -O3 -fomit-frame-pointer compiled version.  Your results will
+ * depend on how large of a buffer is used for z_stream.next_in & next_out
+ * (8K-32K worked best for my 256K cpu cache) and how much overhead there is in
+ * stream processing I/O and crc32/addler32.  In my case, this routine used
+ * 70% of the cpu time and crc32 used 20%.
+ *
+ * I am confident that this version will work in the general case, but I have
+ * not tested a wide variety of datasets or a wide variety of platforms.
+ *
+ * Jan-24-2003 -- Added -DUSE_MMX define for slightly faster inflating.
+ * It should be a runtime flag instead of compile time flag...
+ *
+ * Jan-26-2003 -- Added runtime check for MMX support with cpuid instruction.
+ * With -DUSE_MMX, only MMX code is compiled.  With -DNO_MMX, only non-MMX code
+ * is compiled.  Without either option, runtime detection is enabled.  Runtime
+ * detection should work on all modern cpus and the recomended algorithm (flip
+ * ID bit on eflags and then use the cpuid instruction) is used in many
+ * multimedia applications.  Tested under win2k with gcc-2.95 and gas-2.12
+ * distributed with cygwin3.  Compiling with gcc-2.95 -c inffast.S -o
+ * inffast.obj generates a COFF object which can then be linked with MSVC++
+ * compiled code.  Tested under FreeBSD 4.7 with gcc-2.95.
+ *
+ * Jan-28-2003 -- Tested Athlon XP... MMX mode is slower than no MMX (and
+ * slower than compiler generated code).  Adjusted cpuid check to use the MMX
+ * code only for Pentiums < P4 until I have more data on the P4.  Speed
+ * improvment is only about 15% on the Athlon when compared with code generated
+ * with MSVC++.  Not sure yet, but I think the P4 will also be slower using the
+ * MMX mode because many of it's x86 ALU instructions execute in .5 cycles and
+ * have less latency than MMX ops.  Added code to buffer the last 11 bytes of
+ * the input stream since the MMX code grabs bits in chunks of 32, which
+ * differs from the inffast.c algorithm.  I don't think there would have been
+ * read overruns where a page boundary was crossed (a segfault), but there
+ * could have been overruns when next_in ends on unaligned memory (unintialized
+ * memory read).
+ *
+ * Mar-13-2003 -- P4 MMX is slightly slower than P4 NO_MMX.  I created a C
+ * version of the non-MMX code so that it doesn't depend on zstrm and zstate
+ * structure offsets which are hard coded in this file.  This was last tested
+ * with zlib-1.2.0 which is currently in beta testing, newer versions of this
+ * and inffas86.c can be found at http://www.eetbeetee.com/zlib/ and
+ * http://www.charm.net/~christop/zlib/
+ */
+
+
+/*
+ * if you have underscore linking problems (_inflate_fast undefined), try
+ * using -DGAS_COFF
+ */
+#if ! defined( GAS_COFF ) && ! defined( GAS_ELF )
+
+#if defined( WIN32 ) || defined( __CYGWIN__ )
+#define GAS_COFF /* windows object format */
+#else
+#define GAS_ELF
+#endif
+
+#endif /* ! GAS_COFF && ! GAS_ELF */
+
+
+#if defined( GAS_COFF )
+
+/* coff externals have underscores */
+#define inflate_fast _inflate_fast
+#define inflate_fast_use_mmx _inflate_fast_use_mmx
+
+#endif /* GAS_COFF */
+
+
+.file "inffast.S"
+
+.globl inflate_fast
+
+.text
+.align 4,0
+.L_invalid_literal_length_code_msg:
+.string "invalid literal/length code"
+
+.align 4,0
+.L_invalid_distance_code_msg:
+.string "invalid distance code"
+
+.align 4,0
+.L_invalid_distance_too_far_msg:
+.string "invalid distance too far back"
+
+#if ! defined( NO_MMX )
+.align 4,0
+.L_mask: /* mask[N] = ( 1 << N ) - 1 */
+.long 0
+.long 1
+.long 3
+.long 7
+.long 15
+.long 31
+.long 63
+.long 127
+.long 255
+.long 511
+.long 1023
+.long 2047
+.long 4095
+.long 8191
+.long 16383
+.long 32767
+.long 65535
+.long 131071
+.long 262143
+.long 524287
+.long 1048575
+.long 2097151
+.long 4194303
+.long 8388607
+.long 16777215
+.long 33554431
+.long 67108863
+.long 134217727
+.long 268435455
+.long 536870911
+.long 1073741823
+.long 2147483647
+.long 4294967295
+#endif /* NO_MMX */
+
+.text
+
+/*
+ * struct z_stream offsets, in zlib.h
+ */
+#define next_in_strm   0   /* strm->next_in */
+#define avail_in_strm  4   /* strm->avail_in */
+#define next_out_strm  12  /* strm->next_out */
+#define avail_out_strm 16  /* strm->avail_out */
+#define msg_strm       24  /* strm->msg */
+#define state_strm     28  /* strm->state */
+
+/*
+ * struct inflate_state offsets, in inflate.h
+ */
+#define mode_state     0   /* state->mode */
+#define wsize_state    32  /* state->wsize */
+#define write_state    40  /* state->write */
+#define window_state   44  /* state->window */
+#define hold_state     48  /* state->hold */
+#define bits_state     52  /* state->bits */
+#define lencode_state  68  /* state->lencode */
+#define distcode_state 72  /* state->distcode */
+#define lenbits_state  76  /* state->lenbits */
+#define distbits_state 80  /* state->distbits */
+
+/*
+ * inflate_fast's activation record
+ */
+#define local_var_size 64 /* how much local space for vars */
+#define strm_sp        88 /* first arg: z_stream * (local_var_size + 24) */
+#define start_sp       92 /* second arg: unsigned int (local_var_size + 28) */
+
+/*
+ * offsets for local vars on stack
+ */
+#define out            60  /* unsigned char* */
+#define window         56  /* unsigned char* */
+#define wsize          52  /* unsigned int */
+#define write          48  /* unsigned int */
+#define in             44  /* unsigned char* */
+#define beg            40  /* unsigned char* */
+#define buf            28  /* char[ 12 ] */
+#define len            24  /* unsigned int */
+#define last           20  /* unsigned char* */
+#define end            16  /* unsigned char* */
+#define dcode          12  /* code* */
+#define lcode           8  /* code* */
+#define dmask           4  /* unsigned int */
+#define lmask           0  /* unsigned int */
+
+/*
+ * typedef enum inflate_mode consts, in inflate.h
+ */
+#define INFLATE_MODE_TYPE 11  /* state->mode flags enum-ed in inflate.h */
+#define INFLATE_MODE_BAD  26
+
+
+#if ! defined( USE_MMX ) && ! defined( NO_MMX )
+
+#define RUN_TIME_MMX
+
+#define CHECK_MMX    1
+#define DO_USE_MMX   2
+#define DONT_USE_MMX 3
+
+.globl inflate_fast_use_mmx
+
+.data
+
+.align 4,0
+inflate_fast_use_mmx: /* integer flag for run time control 1=check,2=mmx,3=no */
+.long CHECK_MMX
+
+#if defined( GAS_ELF )
+/* elf info */
+.type   inflate_fast_use_mmx,@object
+.size   inflate_fast_use_mmx,4
+#endif
+
+#endif /* RUN_TIME_MMX */
+
+#if defined( GAS_COFF )
+/* coff info: scl 2 = extern, type 32 = function */
+.def inflate_fast; .scl 2; .type 32; .endef
+#endif
+
+.text
+
+.align 32,0x90
+inflate_fast:
+        pushl   %edi
+        pushl   %esi
+        pushl   %ebp
+        pushl   %ebx
+        pushf   /* save eflags (strm_sp, state_sp assumes this is 32 bits) */
+        subl    $local_var_size, %esp
+        cld
+
+#define strm_r  %esi
+#define state_r %edi
+
+        movl    strm_sp(%esp), strm_r
+        movl    state_strm(strm_r), state_r
+
+        /* in = strm->next_in;
+         * out = strm->next_out;
+         * last = in + strm->avail_in - 11;
+         * beg = out - (start - strm->avail_out);
+         * end = out + (strm->avail_out - 257);
+         */
+        movl    avail_in_strm(strm_r), %edx
+        movl    next_in_strm(strm_r), %eax
+
+        addl    %eax, %edx      /* avail_in += next_in */
+        subl    $11, %edx       /* avail_in -= 11 */
+
+        movl    %eax, in(%esp)
+        movl    %edx, last(%esp)
+
+        movl    start_sp(%esp), %ebp
+        movl    avail_out_strm(strm_r), %ecx
+        movl    next_out_strm(strm_r), %ebx
+
+        subl    %ecx, %ebp      /* start -= avail_out */
+        negl    %ebp            /* start = -start */
+        addl    %ebx, %ebp      /* start += next_out */
+
+        subl    $257, %ecx      /* avail_out -= 257 */
+        addl    %ebx, %ecx      /* avail_out += out */
+
+        movl    %ebx, out(%esp)
+        movl    %ebp, beg(%esp)
+        movl    %ecx, end(%esp)
+
+        /* wsize = state->wsize;
+         * write = state->write;
+         * window = state->window;
+         * hold = state->hold;
+         * bits = state->bits;
+         * lcode = state->lencode;
+         * dcode = state->distcode;
+         * lmask = ( 1 << state->lenbits ) - 1;
+         * dmask = ( 1 << state->distbits ) - 1;
+         */
+
+        movl    lencode_state(state_r), %eax
+        movl    distcode_state(state_r), %ecx
+
+        movl    %eax, lcode(%esp)
+        movl    %ecx, dcode(%esp)
+
+        movl    $1, %eax
+        movl    lenbits_state(state_r), %ecx
+        shll    %cl, %eax
+        decl    %eax
+        movl    %eax, lmask(%esp)
+
+        movl    $1, %eax
+        movl    distbits_state(state_r), %ecx
+        shll    %cl, %eax
+        decl    %eax
+        movl    %eax, dmask(%esp)
+
+        movl    wsize_state(state_r), %eax
+        movl    write_state(state_r), %ecx
+        movl    window_state(state_r), %edx
+
+        movl    %eax, wsize(%esp)
+        movl    %ecx, write(%esp)
+        movl    %edx, window(%esp)
+
+        movl    hold_state(state_r), %ebp
+        movl    bits_state(state_r), %ebx
+
+#undef strm_r
+#undef state_r
+
+#define in_r       %esi
+#define from_r     %esi
+#define out_r      %edi
+
+        movl    in(%esp), in_r
+        movl    last(%esp), %ecx
+        cmpl    in_r, %ecx
+        ja      .L_align_long           /* if in < last */
+
+        addl    $11, %ecx               /* ecx = &in[ avail_in ] */
+        subl    in_r, %ecx              /* ecx = avail_in */
+        movl    $12, %eax
+        subl    %ecx, %eax              /* eax = 12 - avail_in */
+        leal    buf(%esp), %edi
+        rep     movsb                   /* memcpy( buf, in, avail_in ) */
+        movl    %eax, %ecx
+        xorl    %eax, %eax
+        rep     stosb         /* memset( &buf[ avail_in ], 0, 12 - avail_in ) */
+        leal    buf(%esp), in_r         /* in = buf */
+        movl    in_r, last(%esp)        /* last = in, do just one iteration */
+        jmp     .L_is_aligned
+
+        /* align in_r on long boundary */
+.L_align_long:
+        testl   $3, in_r
+        jz      .L_is_aligned
+        xorl    %eax, %eax
+        movb    (in_r), %al
+        incl    in_r
+        movl    %ebx, %ecx
+        addl    $8, %ebx
+        shll    %cl, %eax
+        orl     %eax, %ebp
+        jmp     .L_align_long
+
+.L_is_aligned:
+        movl    out(%esp), out_r
+
+#if defined( NO_MMX )
+        jmp     .L_do_loop
+#endif
+
+#if defined( USE_MMX )
+        jmp     .L_init_mmx
+#endif
+
+/*** Runtime MMX check ***/
+
+#if defined( RUN_TIME_MMX )
+.L_check_mmx:
+        cmpl    $DO_USE_MMX, inflate_fast_use_mmx
+        je      .L_init_mmx
+        ja      .L_do_loop /* > 2 */
+
+        pushl   %eax
+        pushl   %ebx
+        pushl   %ecx
+        pushl   %edx
+        pushf
+        movl    (%esp), %eax      /* copy eflags to eax */
+        xorl    $0x200000, (%esp) /* try toggling ID bit of eflags (bit 21)
+                                   * to see if cpu supports cpuid...
+                                   * ID bit method not supported by NexGen but
+                                   * bios may load a cpuid instruction and
+                                   * cpuid may be disabled on Cyrix 5-6x86 */
+        popf
+        pushf
+        popl    %edx              /* copy new eflags to edx */
+        xorl    %eax, %edx        /* test if ID bit is flipped */
+        jz      .L_dont_use_mmx   /* not flipped if zero */
+        xorl    %eax, %eax
+        cpuid
+        cmpl    $0x756e6547, %ebx /* check for GenuineIntel in ebx,ecx,edx */
+        jne     .L_dont_use_mmx
+        cmpl    $0x6c65746e, %ecx
+        jne     .L_dont_use_mmx
+        cmpl    $0x49656e69, %edx
+        jne     .L_dont_use_mmx
+        movl    $1, %eax
+        cpuid                     /* get cpu features */
+        shrl    $8, %eax
+        andl    $15, %eax
+        cmpl    $6, %eax          /* check for Pentium family, is 0xf for P4 */
+        jne     .L_dont_use_mmx
+        testl   $0x800000, %edx   /* test if MMX feature is set (bit 23) */
+        jnz     .L_use_mmx
+        jmp     .L_dont_use_mmx
+.L_use_mmx:
+        movl    $DO_USE_MMX, inflate_fast_use_mmx
+        jmp     .L_check_mmx_pop
+.L_dont_use_mmx:
+        movl    $DONT_USE_MMX, inflate_fast_use_mmx
+.L_check_mmx_pop:
+        popl    %edx
+        popl    %ecx
+        popl    %ebx
+        popl    %eax
+        jmp     .L_check_mmx
+#endif
+
+
+/*** Non-MMX code ***/
+
+#if defined ( NO_MMX ) || defined( RUN_TIME_MMX )
+
+#define hold_r     %ebp
+#define bits_r     %bl
+#define bitslong_r %ebx
+
+.align 32,0x90
+.L_while_test:
+        /* while (in < last && out < end)
+         */
+        cmpl    out_r, end(%esp)
+        jbe     .L_break_loop           /* if (out >= end) */
+
+        cmpl    in_r, last(%esp)
+        jbe     .L_break_loop
+
+.L_do_loop:
+        /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out
+         *
+         * do {
+         *   if (bits < 15) {
+         *     hold |= *((unsigned short *)in)++ << bits;
+         *     bits += 16
+         *   }
+         *   this = lcode[hold & lmask]
+         */
+        cmpb    $15, bits_r
+        ja      .L_get_length_code      /* if (15 < bits) */
+
+        xorl    %eax, %eax
+        lodsw                           /* al = *(ushort *)in++ */
+        movb    bits_r, %cl             /* cl = bits, needs it for shifting */
+        addb    $16, bits_r             /* bits += 16 */
+        shll    %cl, %eax
+        orl     %eax, hold_r            /* hold |= *((ushort *)in)++ << bits */
+
+.L_get_length_code:
+        movl    lmask(%esp), %edx       /* edx = lmask */
+        movl    lcode(%esp), %ecx       /* ecx = lcode */
+        andl    hold_r, %edx            /* edx &= hold */
+        movl    (%ecx,%edx,4), %eax     /* eax = lcode[hold & lmask] */
+
+.L_dolen:
+        /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out
+         *
+         * dolen:
+         *    bits -= this.bits;
+         *    hold >>= this.bits
+         */
+        movb    %ah, %cl                /* cl = this.bits */
+        subb    %ah, bits_r             /* bits -= this.bits */
+        shrl    %cl, hold_r             /* hold >>= this.bits */
+
+        /* check if op is a literal
+         * if (op == 0) {
+         *    PUP(out) = this.val;
+         *  }
+         */
+        testb   %al, %al
+        jnz     .L_test_for_length_base /* if (op != 0) 45.7% */
+
+        shrl    $16, %eax               /* output this.val char */
+        stosb
+        jmp     .L_while_test
+
+.L_test_for_length_base:
+        /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = len
+         *
+         * else if (op & 16) {
+         *   len = this.val
+         *   op &= 15
+         *   if (op) {
+         *     if (op > bits) {
+         *       hold |= *((unsigned short *)in)++ << bits;
+         *       bits += 16
+         *     }
+         *     len += hold & mask[op];
+         *     bits -= op;
+         *     hold >>= op;
+         *   }
+         */
+#define len_r %edx
+        movl    %eax, len_r             /* len = this */
+        shrl    $16, len_r              /* len = this.val */
+        movb    %al, %cl
+
+        testb   $16, %al
+        jz      .L_test_for_second_level_length /* if ((op & 16) == 0) 8% */
+        andb    $15, %cl                /* op &= 15 */
+        jz      .L_save_len             /* if (!op) */
+        cmpb    %cl, bits_r
+        jae     .L_add_bits_to_len      /* if (op <= bits) */
+
+        movb    %cl, %ch                /* stash op in ch, freeing cl */
+        xorl    %eax, %eax
+        lodsw                           /* al = *(ushort *)in++ */
+        movb    bits_r, %cl             /* cl = bits, needs it for shifting */
+        addb    $16, bits_r             /* bits += 16 */
+        shll    %cl, %eax
+        orl     %eax, hold_r            /* hold |= *((ushort *)in)++ << bits */
+        movb    %ch, %cl                /* move op back to ecx */
+
+.L_add_bits_to_len:
+        movl    $1, %eax
+        shll    %cl, %eax
+        decl    %eax
+        subb    %cl, bits_r
+        andl    hold_r, %eax            /* eax &= hold */
+        shrl    %cl, hold_r
+        addl    %eax, len_r             /* len += hold & mask[op] */
+
+.L_save_len:
+        movl    len_r, len(%esp)        /* save len */
+#undef  len_r
+
+.L_decode_distance:
+        /* regs: %esi = in, %ebp = hold, %bl = bits, %edi = out, %edx = dist
+         *
+         *   if (bits < 15) {
+         *     hold |= *((unsigned short *)in)++ << bits;
+         *     bits += 16
+         *   }
+         *   this = dcode[hold & dmask];
+         * dodist:
+         *   bits -= this.bits;
+         *   hold >>= this.bits;
+         *   op = this.op;
+         */
+
+        cmpb    $15, bits_r
+        ja      .L_get_distance_code    /* if (15 < bits) */
+
+        xorl    %eax, %eax
+        lodsw                           /* al = *(ushort *)in++ */
+        movb    bits_r, %cl             /* cl = bits, needs it for shifting */
+        addb    $16, bits_r             /* bits += 16 */
+        shll    %cl, %eax
+        orl     %eax, hold_r            /* hold |= *((ushort *)in)++ << bits */
+
+.L_get_distance_code:
+        movl    dmask(%esp), %edx       /* edx = dmask */
+        movl    dcode(%esp), %ecx       /* ecx = dcode */
+        andl    hold_r, %edx            /* edx &= hold */
+        movl    (%ecx,%edx,4), %eax     /* eax = dcode[hold & dmask] */
+
+#define dist_r %edx
+.L_dodist:
+        movl    %eax, dist_r            /* dist = this */
+        shrl    $16, dist_r             /* dist = this.val */
+        movb    %ah, %cl
+        subb    %ah, bits_r             /* bits -= this.bits */
+        shrl    %cl, hold_r             /* hold >>= this.bits */
+
+        /* if (op & 16) {
+         *   dist = this.val
+         *   op &= 15
+         *   if (op > bits) {
+         *     hold |= *((unsigned short *)in)++ << bits;
+         *     bits += 16
+         *   }
+         *   dist += hold & mask[op];
+         *   bits -= op;
+         *   hold >>= op;
+         */
+        movb    %al, %cl                /* cl = this.op */
+
+        testb   $16, %al                /* if ((op & 16) == 0) */
+        jz      .L_test_for_second_level_dist
+        andb    $15, %cl                /* op &= 15 */
+        jz      .L_check_dist_one
+        cmpb    %cl, bits_r
+        jae     .L_add_bits_to_dist     /* if (op <= bits) 97.6% */
+
+        movb    %cl, %ch                /* stash op in ch, freeing cl */
+        xorl    %eax, %eax
+        lodsw                           /* al = *(ushort *)in++ */
+        movb    bits_r, %cl             /* cl = bits, needs it for shifting */
+        addb    $16, bits_r             /* bits += 16 */
+        shll    %cl, %eax
+        orl     %eax, hold_r            /* hold |= *((ushort *)in)++ << bits */
+        movb    %ch, %cl                /* move op back to ecx */
+
+.L_add_bits_to_dist:
+        movl    $1, %eax
+        shll    %cl, %eax
+        decl    %eax                    /* (1 << op) - 1 */
+        subb    %cl, bits_r
+        andl    hold_r, %eax            /* eax &= hold */
+        shrl    %cl, hold_r
+        addl    %eax, dist_r            /* dist += hold & ((1 << op) - 1) */
+        jmp     .L_check_window
+
+.L_check_window:
+        /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist
+         *       %ecx = nbytes
+         *
+         * nbytes = out - beg;
+         * if (dist <= nbytes) {
+         *   from = out - dist;
+         *   do {
+         *     PUP(out) = PUP(from);
+         *   } while (--len > 0) {
+         * }
+         */
+
+        movl    in_r, in(%esp)          /* save in so from can use it's reg */
+        movl    out_r, %eax
+        subl    beg(%esp), %eax         /* nbytes = out - beg */
+
+        cmpl    dist_r, %eax
+        jb      .L_clip_window          /* if (dist > nbytes) 4.2% */
+
+        movl    len(%esp), %ecx
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+
+        subl    $3, %ecx
+        movb    (from_r), %al
+        movb    %al, (out_r)
+        movb    1(from_r), %al
+        movb    2(from_r), %dl
+        addl    $3, from_r
+        movb    %al, 1(out_r)
+        movb    %dl, 2(out_r)
+        addl    $3, out_r
+        rep     movsb
+
+        movl    in(%esp), in_r          /* move in back to %esi, toss from */
+        jmp     .L_while_test
+
+.align 16,0x90
+.L_check_dist_one:
+        cmpl    $1, dist_r
+        jne     .L_check_window
+        cmpl    out_r, beg(%esp)
+        je      .L_check_window
+
+        decl    out_r
+        movl    len(%esp), %ecx
+        movb    (out_r), %al
+        subl    $3, %ecx
+
+        movb    %al, 1(out_r)
+        movb    %al, 2(out_r)
+        movb    %al, 3(out_r)
+        addl    $4, out_r
+        rep     stosb
+
+        jmp     .L_while_test
+
+.align 16,0x90
+.L_test_for_second_level_length:
+        /* else if ((op & 64) == 0) {
+         *   this = lcode[this.val + (hold & mask[op])];
+         * }
+         */
+        testb   $64, %al
+        jnz     .L_test_for_end_of_block  /* if ((op & 64) != 0) */
+
+        movl    $1, %eax
+        shll    %cl, %eax
+        decl    %eax
+        andl    hold_r, %eax            /* eax &= hold */
+        addl    %edx, %eax              /* eax += this.val */
+        movl    lcode(%esp), %edx       /* edx = lcode */
+        movl    (%edx,%eax,4), %eax     /* eax = lcode[val + (hold&mask[op])] */
+        jmp     .L_dolen
+
+.align 16,0x90
+.L_test_for_second_level_dist:
+        /* else if ((op & 64) == 0) {
+         *   this = dcode[this.val + (hold & mask[op])];
+         * }
+         */
+        testb   $64, %al
+        jnz     .L_invalid_distance_code  /* if ((op & 64) != 0) */
+
+        movl    $1, %eax
+        shll    %cl, %eax
+        decl    %eax
+        andl    hold_r, %eax            /* eax &= hold */
+        addl    %edx, %eax              /* eax += this.val */
+        movl    dcode(%esp), %edx       /* edx = dcode */
+        movl    (%edx,%eax,4), %eax     /* eax = dcode[val + (hold&mask[op])] */
+        jmp     .L_dodist
+
+.align 16,0x90
+.L_clip_window:
+        /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist
+         *       %ecx = nbytes
+         *
+         * else {
+         *   if (dist > wsize) {
+         *     invalid distance
+         *   }
+         *   from = window;
+         *   nbytes = dist - nbytes;
+         *   if (write == 0) {
+         *     from += wsize - nbytes;
+         */
+#define nbytes_r %ecx
+        movl    %eax, nbytes_r
+        movl    wsize(%esp), %eax       /* prepare for dist compare */
+        negl    nbytes_r                /* nbytes = -nbytes */
+        movl    window(%esp), from_r    /* from = window */
+
+        cmpl    dist_r, %eax
+        jb      .L_invalid_distance_too_far /* if (dist > wsize) */
+
+        addl    dist_r, nbytes_r        /* nbytes = dist - nbytes */
+        cmpl    $0, write(%esp)
+        jne     .L_wrap_around_window   /* if (write != 0) */
+
+        subl    nbytes_r, %eax
+        addl    %eax, from_r            /* from += wsize - nbytes */
+
+        /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist
+         *       %ecx = nbytes, %eax = len
+         *
+         *     if (nbytes < len) {
+         *       len -= nbytes;
+         *       do {
+         *         PUP(out) = PUP(from);
+         *       } while (--nbytes);
+         *       from = out - dist;
+         *     }
+         *   }
+         */
+#define len_r %eax
+        movl    len(%esp), len_r
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1             /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+        jmp     .L_do_copy1
+
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1             /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+        jmp     .L_do_copy1
+
+.L_wrap_around_window:
+        /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist
+         *       %ecx = nbytes, %eax = write, %eax = len
+         *
+         *   else if (write < nbytes) {
+         *     from += wsize + write - nbytes;
+         *     nbytes -= write;
+         *     if (nbytes < len) {
+         *       len -= nbytes;
+         *       do {
+         *         PUP(out) = PUP(from);
+         *       } while (--nbytes);
+         *       from = window;
+         *       nbytes = write;
+         *       if (nbytes < len) {
+         *         len -= nbytes;
+         *         do {
+         *           PUP(out) = PUP(from);
+         *         } while(--nbytes);
+         *         from = out - dist;
+         *       }
+         *     }
+         *   }
+         */
+#define write_r %eax
+        movl    write(%esp), write_r
+        cmpl    write_r, nbytes_r
+        jbe     .L_contiguous_in_window /* if (write >= nbytes) */
+
+        addl    wsize(%esp), from_r
+        addl    write_r, from_r
+        subl    nbytes_r, from_r        /* from += wsize + write - nbytes */
+        subl    write_r, nbytes_r       /* nbytes -= write */
+#undef write_r
+
+        movl    len(%esp), len_r
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1             /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    window(%esp), from_r    /* from = window */
+        movl    write(%esp), nbytes_r   /* nbytes = write */
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1             /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+        jmp     .L_do_copy1
+
+.L_contiguous_in_window:
+        /* regs: %esi = from, %ebp = hold, %bl = bits, %edi = out, %edx = dist
+         *       %ecx = nbytes, %eax = write, %eax = len
+         *
+         *   else {
+         *     from += write - nbytes;
+         *     if (nbytes < len) {
+         *       len -= nbytes;
+         *       do {
+         *         PUP(out) = PUP(from);
+         *       } while (--nbytes);
+         *       from = out - dist;
+         *     }
+         *   }
+         */
+#define write_r %eax
+        addl    write_r, from_r
+        subl    nbytes_r, from_r        /* from += write - nbytes */
+#undef write_r
+
+        movl    len(%esp), len_r
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1             /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+
+.L_do_copy1:
+        /* regs: %esi = from, %esi = in, %ebp = hold, %bl = bits, %edi = out
+         *       %eax = len
+         *
+         *     while (len > 0) {
+         *       PUP(out) = PUP(from);
+         *       len--;
+         *     }
+         *   }
+         * } while (in < last && out < end);
+         */
+#undef nbytes_r
+#define in_r %esi
+        movl    len_r, %ecx
+        rep     movsb
+
+        movl    in(%esp), in_r          /* move in back to %esi, toss from */
+        jmp     .L_while_test
+
+#undef len_r
+#undef dist_r
+
+#endif /* NO_MMX || RUN_TIME_MMX */
+
+
+/*** MMX code ***/
+
+#if defined( USE_MMX ) || defined( RUN_TIME_MMX )
+
+.align 32,0x90
+.L_init_mmx:
+        emms
+
+#undef  bits_r
+#undef  bitslong_r
+#define bitslong_r %ebp
+#define hold_mm    %mm0
+        movd    %ebp, hold_mm
+        movl    %ebx, bitslong_r
+
+#define used_mm   %mm1
+#define dmask2_mm %mm2
+#define lmask2_mm %mm3
+#define lmask_mm  %mm4
+#define dmask_mm  %mm5
+#define tmp_mm    %mm6
+
+        movd    lmask(%esp), lmask_mm
+        movq    lmask_mm, lmask2_mm
+        movd    dmask(%esp), dmask_mm
+        movq    dmask_mm, dmask2_mm
+        pxor    used_mm, used_mm
+        movl    lcode(%esp), %ebx       /* ebx = lcode */
+        jmp     .L_do_loop_mmx
+
+.align 32,0x90
+.L_while_test_mmx:
+        /* while (in < last && out < end)
+         */
+        cmpl    out_r, end(%esp)
+        jbe     .L_break_loop           /* if (out >= end) */
+
+        cmpl    in_r, last(%esp)
+        jbe     .L_break_loop
+
+.L_do_loop_mmx:
+        psrlq   used_mm, hold_mm        /* hold_mm >>= last bit length */
+
+        cmpl    $32, bitslong_r
+        ja      .L_get_length_code_mmx  /* if (32 < bits) */
+
+        movd    bitslong_r, tmp_mm
+        movd    (in_r), %mm7
+        addl    $4, in_r
+        psllq   tmp_mm, %mm7
+        addl    $32, bitslong_r
+        por     %mm7, hold_mm           /* hold_mm |= *((uint *)in)++ << bits */
+
+.L_get_length_code_mmx:
+        pand    hold_mm, lmask_mm
+        movd    lmask_mm, %eax
+        movq    lmask2_mm, lmask_mm
+        movl    (%ebx,%eax,4), %eax     /* eax = lcode[hold & lmask] */
+
+.L_dolen_mmx:
+        movzbl  %ah, %ecx               /* ecx = this.bits */
+        movd    %ecx, used_mm
+        subl    %ecx, bitslong_r        /* bits -= this.bits */
+
+        testb   %al, %al
+        jnz     .L_test_for_length_base_mmx /* if (op != 0) 45.7% */
+
+        shrl    $16, %eax               /* output this.val char */
+        stosb
+        jmp     .L_while_test_mmx
+
+.L_test_for_length_base_mmx:
+#define len_r  %edx
+        movl    %eax, len_r             /* len = this */
+        shrl    $16, len_r              /* len = this.val */
+
+        testb   $16, %al
+        jz      .L_test_for_second_level_length_mmx /* if ((op & 16) == 0) 8% */
+        andl    $15, %eax               /* op &= 15 */
+        jz      .L_decode_distance_mmx  /* if (!op) */
+
+        psrlq   used_mm, hold_mm        /* hold_mm >>= last bit length */
+        movd    %eax, used_mm
+        movd    hold_mm, %ecx
+        subl    %eax, bitslong_r
+        andl    .L_mask(,%eax,4), %ecx
+        addl    %ecx, len_r             /* len += hold & mask[op] */
+
+.L_decode_distance_mmx:
+        psrlq   used_mm, hold_mm        /* hold_mm >>= last bit length */
+
+        cmpl    $32, bitslong_r
+        ja      .L_get_dist_code_mmx    /* if (32 < bits) */
+
+        movd    bitslong_r, tmp_mm
+        movd    (in_r), %mm7
+        addl    $4, in_r
+        psllq   tmp_mm, %mm7
+        addl    $32, bitslong_r
+        por     %mm7, hold_mm           /* hold_mm |= *((uint *)in)++ << bits */
+
+.L_get_dist_code_mmx:
+        movl    dcode(%esp), %ebx       /* ebx = dcode */
+        pand    hold_mm, dmask_mm
+        movd    dmask_mm, %eax
+        movq    dmask2_mm, dmask_mm
+        movl    (%ebx,%eax,4), %eax     /* eax = dcode[hold & lmask] */
+
+.L_dodist_mmx:
+#define dist_r %ebx
+        movzbl  %ah, %ecx               /* ecx = this.bits */
+        movl    %eax, dist_r
+        shrl    $16, dist_r             /* dist  = this.val */
+        subl    %ecx, bitslong_r        /* bits -= this.bits */
+        movd    %ecx, used_mm
+
+        testb   $16, %al                /* if ((op & 16) == 0) */
+        jz      .L_test_for_second_level_dist_mmx
+        andl    $15, %eax               /* op &= 15 */
+        jz      .L_check_dist_one_mmx
+
+.L_add_bits_to_dist_mmx:
+        psrlq   used_mm, hold_mm        /* hold_mm >>= last bit length */
+        movd    %eax, used_mm           /* save bit length of current op */
+        movd    hold_mm, %ecx           /* get the next bits on input stream */
+        subl    %eax, bitslong_r        /* bits -= op bits */
+        andl    .L_mask(,%eax,4), %ecx  /* ecx   = hold & mask[op] */
+        addl    %ecx, dist_r            /* dist += hold & mask[op] */
+
+.L_check_window_mmx:
+        movl    in_r, in(%esp)          /* save in so from can use it's reg */
+        movl    out_r, %eax
+        subl    beg(%esp), %eax         /* nbytes = out - beg */
+
+        cmpl    dist_r, %eax
+        jb      .L_clip_window_mmx      /* if (dist > nbytes) 4.2% */
+
+        movl    len_r, %ecx
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+
+        subl    $3, %ecx
+        movb    (from_r), %al
+        movb    %al, (out_r)
+        movb    1(from_r), %al
+        movb    2(from_r), %dl
+        addl    $3, from_r
+        movb    %al, 1(out_r)
+        movb    %dl, 2(out_r)
+        addl    $3, out_r
+        rep     movsb
+
+        movl    in(%esp), in_r          /* move in back to %esi, toss from */
+        movl    lcode(%esp), %ebx       /* move lcode back to %ebx, toss dist */
+        jmp     .L_while_test_mmx
+
+.align 16,0x90
+.L_check_dist_one_mmx:
+        cmpl    $1, dist_r
+        jne     .L_check_window_mmx
+        cmpl    out_r, beg(%esp)
+        je      .L_check_window_mmx
+
+        decl    out_r
+        movl    len_r, %ecx
+        movb    (out_r), %al
+        subl    $3, %ecx
+
+        movb    %al, 1(out_r)
+        movb    %al, 2(out_r)
+        movb    %al, 3(out_r)
+        addl    $4, out_r
+        rep     stosb
+
+        movl    lcode(%esp), %ebx       /* move lcode back to %ebx, toss dist */
+        jmp     .L_while_test_mmx
+
+.align 16,0x90
+.L_test_for_second_level_length_mmx:
+        testb   $64, %al
+        jnz     .L_test_for_end_of_block  /* if ((op & 64) != 0) */
+
+        andl    $15, %eax
+        psrlq   used_mm, hold_mm        /* hold_mm >>= last bit length */
+        movd    hold_mm, %ecx
+        andl    .L_mask(,%eax,4), %ecx
+        addl    len_r, %ecx
+        movl    (%ebx,%ecx,4), %eax     /* eax = lcode[hold & lmask] */
+        jmp     .L_dolen_mmx
+
+.align 16,0x90
+.L_test_for_second_level_dist_mmx:
+        testb   $64, %al
+        jnz     .L_invalid_distance_code  /* if ((op & 64) != 0) */
+
+        andl    $15, %eax
+        psrlq   used_mm, hold_mm        /* hold_mm >>= last bit length */
+        movd    hold_mm, %ecx
+        andl    .L_mask(,%eax,4), %ecx
+        movl    dcode(%esp), %eax       /* ecx = dcode */
+        addl    dist_r, %ecx
+        movl    (%eax,%ecx,4), %eax     /* eax = lcode[hold & lmask] */
+        jmp     .L_dodist_mmx
+
+.align 16,0x90
+.L_clip_window_mmx:
+#define nbytes_r %ecx
+        movl    %eax, nbytes_r
+        movl    wsize(%esp), %eax       /* prepare for dist compare */
+        negl    nbytes_r                /* nbytes = -nbytes */
+        movl    window(%esp), from_r    /* from = window */
+
+        cmpl    dist_r, %eax
+        jb      .L_invalid_distance_too_far /* if (dist > wsize) */
+
+        addl    dist_r, nbytes_r        /* nbytes = dist - nbytes */
+        cmpl    $0, write(%esp)
+        jne     .L_wrap_around_window_mmx /* if (write != 0) */
+
+        subl    nbytes_r, %eax
+        addl    %eax, from_r            /* from += wsize - nbytes */
+
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1_mmx         /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+        jmp     .L_do_copy1_mmx
+
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1_mmx         /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+        jmp     .L_do_copy1_mmx
+
+.L_wrap_around_window_mmx:
+#define write_r %eax
+        movl    write(%esp), write_r
+        cmpl    write_r, nbytes_r
+        jbe     .L_contiguous_in_window_mmx /* if (write >= nbytes) */
+
+        addl    wsize(%esp), from_r
+        addl    write_r, from_r
+        subl    nbytes_r, from_r        /* from += wsize + write - nbytes */
+        subl    write_r, nbytes_r       /* nbytes -= write */
+#undef write_r
+
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1_mmx         /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    window(%esp), from_r    /* from = window */
+        movl    write(%esp), nbytes_r   /* nbytes = write */
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1_mmx         /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+        jmp     .L_do_copy1_mmx
+
+.L_contiguous_in_window_mmx:
+#define write_r %eax
+        addl    write_r, from_r
+        subl    nbytes_r, from_r        /* from += write - nbytes */
+#undef write_r
+
+        cmpl    nbytes_r, len_r
+        jbe     .L_do_copy1_mmx         /* if (nbytes >= len) */
+
+        subl    nbytes_r, len_r         /* len -= nbytes */
+        rep     movsb
+        movl    out_r, from_r
+        subl    dist_r, from_r          /* from = out - dist */
+
+.L_do_copy1_mmx:
+#undef nbytes_r
+#define in_r %esi
+        movl    len_r, %ecx
+        rep     movsb
+
+        movl    in(%esp), in_r          /* move in back to %esi, toss from */
+        movl    lcode(%esp), %ebx       /* move lcode back to %ebx, toss dist */
+        jmp     .L_while_test_mmx
+
+#undef hold_r
+#undef bitslong_r
+
+#endif /* USE_MMX || RUN_TIME_MMX */
+
+
+/*** USE_MMX, NO_MMX, and RUNTIME_MMX from here on ***/
+
+.L_invalid_distance_code:
+        /* else {
+         *   strm->msg = "invalid distance code";
+         *   state->mode = BAD;
+         * }
+         */
+        movl    $.L_invalid_distance_code_msg, %ecx
+        movl    $INFLATE_MODE_BAD, %edx
+        jmp     .L_update_stream_state
+
+.L_test_for_end_of_block:
+        /* else if (op & 32) {
+         *   state->mode = TYPE;
+         *   break;
+         * }
+         */
+        testb   $32, %al
+        jz      .L_invalid_literal_length_code  /* if ((op & 32) == 0) */
+
+        movl    $0, %ecx
+        movl    $INFLATE_MODE_TYPE, %edx
+        jmp     .L_update_stream_state
+
+.L_invalid_literal_length_code:
+        /* else {
+         *   strm->msg = "invalid literal/length code";
+         *   state->mode = BAD;
+         * }
+         */
+        movl    $.L_invalid_literal_length_code_msg, %ecx
+        movl    $INFLATE_MODE_BAD, %edx
+        jmp     .L_update_stream_state
+
+.L_invalid_distance_too_far:
+        /* strm->msg = "invalid distance too far back";
+         * state->mode = BAD;
+         */
+        movl    in(%esp), in_r          /* from_r has in's reg, put in back */
+        movl    $.L_invalid_distance_too_far_msg, %ecx
+        movl    $INFLATE_MODE_BAD, %edx
+        jmp     .L_update_stream_state
+
+.L_update_stream_state:
+        /* set strm->msg = %ecx, strm->state->mode = %edx */
+        movl    strm_sp(%esp), %eax
+        testl   %ecx, %ecx              /* if (msg != NULL) */
+        jz      .L_skip_msg
+        movl    %ecx, msg_strm(%eax)    /* strm->msg = msg */
+.L_skip_msg:
+        movl    state_strm(%eax), %eax  /* state = strm->state */
+        movl    %edx, mode_state(%eax)  /* state->mode = edx (BAD | TYPE) */
+        jmp     .L_break_loop
+
+.align 32,0x90
+.L_break_loop:
+
+/*
+ * Regs:
+ *
+ * bits = %ebp when mmx, and in %ebx when non-mmx
+ * hold = %hold_mm when mmx, and in %ebp when non-mmx
+ * in   = %esi
+ * out  = %edi
+ */
+
+#if defined( USE_MMX ) || defined( RUN_TIME_MMX )
+
+#if defined( RUN_TIME_MMX )
+
+        cmpl    $DO_USE_MMX, inflate_fast_use_mmx
+        jne     .L_update_next_in
+
+#endif /* RUN_TIME_MMX */
+
+        movl    %ebp, %ebx
+
+.L_update_next_in:
+
+#endif
+
+#define strm_r  %eax
+#define state_r %edx
+
+        /* len = bits >> 3;
+         * in -= len;
+         * bits -= len << 3;
+         * hold &= (1U << bits) - 1;
+         * state->hold = hold;
+         * state->bits = bits;
+         * strm->next_in = in;
+         * strm->next_out = out;
+         */
+        movl    strm_sp(%esp), strm_r
+        movl    %ebx, %ecx
+        movl    state_strm(strm_r), state_r
+        shrl    $3, %ecx
+        subl    %ecx, in_r
+        shll    $3, %ecx
+        subl    %ecx, %ebx
+        movl    out_r, next_out_strm(strm_r)
+        movl    %ebx, bits_state(state_r)
+        movl    %ebx, %ecx
+
+        leal    buf(%esp), %ebx
+        cmpl    %ebx, last(%esp)
+        jne     .L_buf_not_used         /* if buf != last */
+
+        subl    %ebx, in_r              /* in -= buf */
+        movl    next_in_strm(strm_r), %ebx
+        movl    %ebx, last(%esp)        /* last = strm->next_in */
+        addl    %ebx, in_r              /* in += strm->next_in */
+        movl    avail_in_strm(strm_r), %ebx
+        subl    $11, %ebx
+        addl    %ebx, last(%esp)    /* last = &strm->next_in[ avail_in - 11 ] */
+
+.L_buf_not_used:
+        movl    in_r, next_in_strm(strm_r)
+
+        movl    $1, %ebx
+        shll    %cl, %ebx
+        decl    %ebx
+
+#if defined( USE_MMX ) || defined( RUN_TIME_MMX )
+
+#if defined( RUN_TIME_MMX )
+
+        cmpl    $DO_USE_MMX, inflate_fast_use_mmx
+        jne     .L_update_hold
+
+#endif /* RUN_TIME_MMX */
+
+        psrlq   used_mm, hold_mm        /* hold_mm >>= last bit length */
+        movd    hold_mm, %ebp
+
+        emms
+
+.L_update_hold:
+
+#endif /* USE_MMX || RUN_TIME_MMX */
+
+        andl    %ebx, %ebp
+        movl    %ebp, hold_state(state_r)
+
+#define last_r %ebx
+
+        /* strm->avail_in = in < last ? 11 + (last - in) : 11 - (in - last) */
+        movl    last(%esp), last_r
+        cmpl    in_r, last_r
+        jbe     .L_last_is_smaller     /* if (in >= last) */
+
+        subl    in_r, last_r           /* last -= in */
+        addl    $11, last_r            /* last += 11 */
+        movl    last_r, avail_in_strm(strm_r)
+        jmp     .L_fixup_out
+.L_last_is_smaller:
+        subl    last_r, in_r           /* in -= last */
+        negl    in_r                   /* in = -in */
+        addl    $11, in_r              /* in += 11 */
+        movl    in_r, avail_in_strm(strm_r)
+
+#undef last_r
+#define end_r %ebx
+
+.L_fixup_out:
+        /* strm->avail_out = out < end ? 257 + (end - out) : 257 - (out - end)*/
+        movl    end(%esp), end_r
+        cmpl    out_r, end_r
+        jbe     .L_end_is_smaller      /* if (out >= end) */
+
+        subl    out_r, end_r           /* end -= out */
+        addl    $257, end_r            /* end += 257 */
+        movl    end_r, avail_out_strm(strm_r)
+        jmp     .L_done
+.L_end_is_smaller:
+        subl    end_r, out_r           /* out -= end */
+        negl    out_r                  /* out = -out */
+        addl    $257, out_r            /* out += 257 */
+        movl    out_r, avail_out_strm(strm_r)
+
+#undef end_r
+#undef strm_r
+#undef state_r
+
+.L_done:
+        addl    $local_var_size, %esp
+        popf
+        popl    %ebx
+        popl    %ebp
+        popl    %esi
+        popl    %edi
+        ret
+
+#if defined( GAS_ELF )
+/* elf info */
+.type inflate_fast,@function
+.size inflate_fast,.-inflate_fast
+#endif