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Diffstat (limited to 'c/src/lib/libcpu/m68k/m68040/fpsp/ssinh.S')
| -rw-r--r-- | c/src/lib/libcpu/m68k/m68040/fpsp/ssinh.S | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/c/src/lib/libcpu/m68k/m68040/fpsp/ssinh.S b/c/src/lib/libcpu/m68k/m68040/fpsp/ssinh.S deleted file mode 100644 index d25174ed32..0000000000 --- a/c/src/lib/libcpu/m68k/m68040/fpsp/ssinh.S +++ /dev/null @@ -1,137 +0,0 @@ -#include "fpsp-namespace.h" -// -// -// ssinh.sa 3.1 12/10/90 -// -// The entry point sSinh computes the hyperbolic sine of -// an input argument; sSinhd does the same except for denormalized -// input. -// -// Input: Double-extended number X in location pointed to -// by address register a0. -// -// Output: The value sinh(X) returned in floating-point register Fp0. -// -// Accuracy and Monotonicity: The returned result is within 3 ulps in -// 64 significant bit, i.e. within 0.5001 ulp to 53 bits if the -// result is subsequently rounded to double precision. The -// result is provably monotonic in double precision. -// -// Speed: The program sSINH takes approximately 280 cycles. -// -// Algorithm: -// -// SINH -// 1. If |X| > 16380 log2, go to 3. -// -// 2. (|X| <= 16380 log2) Sinh(X) is obtained by the formulae -// y = |X|, sgn = sign(X), and z = expm1(Y), -// sinh(X) = sgn*(1/2)*( z + z/(1+z) ). -// Exit. -// -// 3. If |X| > 16480 log2, go to 5. -// -// 4. (16380 log2 < |X| <= 16480 log2) -// sinh(X) = sign(X) * exp(|X|)/2. -// However, invoking exp(|X|) may cause premature overflow. -// Thus, we calculate sinh(X) as follows: -// Y := |X| -// sgn := sign(X) -// sgnFact := sgn * 2**(16380) -// Y' := Y - 16381 log2 -// sinh(X) := sgnFact * exp(Y'). -// Exit. -// -// 5. (|X| > 16480 log2) sinh(X) must overflow. Return -// sign(X)*Huge*Huge to generate overflow and an infinity with -// the appropriate sign. Huge is the largest finite number in -// extended format. Exit. -// - -// Copyright (C) Motorola, Inc. 1990 -// All Rights Reserved -// -// THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA -// The copyright notice above does not evidence any -// actual or intended publication of such source code. - -//SSINH idnt 2,1 | Motorola 040 Floating Point Software Package - - |section 8 - -T1: .long 0x40C62D38,0xD3D64634 // ... 16381 LOG2 LEAD -T2: .long 0x3D6F90AE,0xB1E75CC7 // ... 16381 LOG2 TRAIL - - |xref t_frcinx - |xref t_ovfl - |xref t_extdnrm - |xref setox - |xref setoxm1 - - .global ssinhd -ssinhd: -//--SINH(X) = X FOR DENORMALIZED X - - bra t_extdnrm - - .global ssinh -ssinh: - fmovex (%a0),%fp0 // ...LOAD INPUT - - movel (%a0),%d0 - movew 4(%a0),%d0 - movel %d0,%a1 // save a copy of original (compacted) operand - andl #0x7FFFFFFF,%d0 - cmpl #0x400CB167,%d0 - bgts SINHBIG - -//--THIS IS THE USUAL CASE, |X| < 16380 LOG2 -//--Y = |X|, Z = EXPM1(Y), SINH(X) = SIGN(X)*(1/2)*( Z + Z/(1+Z) ) - - fabsx %fp0 // ...Y = |X| - - moveml %a1/%d1,-(%sp) - fmovemx %fp0-%fp0,(%a0) - clrl %d1 - bsr setoxm1 // ...FP0 IS Z = EXPM1(Y) - fmovel #0,%fpcr - moveml (%sp)+,%a1/%d1 - - fmovex %fp0,%fp1 - fadds #0x3F800000,%fp1 // ...1+Z - fmovex %fp0,-(%sp) - fdivx %fp1,%fp0 // ...Z/(1+Z) - movel %a1,%d0 - andl #0x80000000,%d0 - orl #0x3F000000,%d0 - faddx (%sp)+,%fp0 - movel %d0,-(%sp) - - fmovel %d1,%fpcr - fmuls (%sp)+,%fp0 //last fp inst - possible exceptions set - - bra t_frcinx - -SINHBIG: - cmpl #0x400CB2B3,%d0 - bgt t_ovfl - fabsx %fp0 - fsubd T1(%pc),%fp0 // ...(|X|-16381LOG2_LEAD) - movel #0,-(%sp) - movel #0x80000000,-(%sp) - movel %a1,%d0 - andl #0x80000000,%d0 - orl #0x7FFB0000,%d0 - movel %d0,-(%sp) // ...EXTENDED FMT - fsubd T2(%pc),%fp0 // ...|X| - 16381 LOG2, ACCURATE - - movel %d1,-(%sp) - clrl %d1 - fmovemx %fp0-%fp0,(%a0) - bsr setox - fmovel (%sp)+,%fpcr - - fmulx (%sp)+,%fp0 //possible exception - bra t_frcinx - - |end |