diff options
Diffstat (limited to 'c/src/lib/libcpu/m68k/m68040/fpsp/gen_except.S')
| -rw-r--r-- | c/src/lib/libcpu/m68k/m68040/fpsp/gen_except.S | 74 |
1 files changed, 37 insertions, 37 deletions
diff --git a/c/src/lib/libcpu/m68k/m68040/fpsp/gen_except.S b/c/src/lib/libcpu/m68k/m68040/fpsp/gen_except.S index 7bb073d657..fa50b40c59 100644 --- a/c/src/lib/libcpu/m68k/m68040/fpsp/gen_except.S +++ b/c/src/lib/libcpu/m68k/m68040/fpsp/gen_except.S @@ -4,10 +4,10 @@ // gen_except.sa 3.7 1/16/92 // // gen_except --- FPSP routine to detect reportable exceptions -// +// // This routine compares the exception enable byte of the // user_fpcr on the stack with the exception status byte -// of the user_fpsr. +// of the user_fpsr. // // Any routine which may report an exceptions must load // the stack frame in memory with the exceptional operand(s). @@ -25,14 +25,14 @@ // // Note: The IEEE standard specifies that inex2 is to be // reported if ovfl occurs and the ovfl enable bit is not -// set but the inex2 enable bit is. +// set but the inex2 enable bit is. // // // Copyright (C) Motorola, Inc. 1990 // All Rights Reserved // -// THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA -// The copyright notice above does not evidence any +// THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA +// The copyright notice above does not evidence any // actual or intended publication of such source code. GEN_EXCEPT: //idnt 2,1 | Motorola 040 Floating Point Software Package @@ -72,12 +72,12 @@ gen_except: // movel ETEMP_EX(%a6),ETEMP_EX(%a1) //copy etemp from unimp movel ETEMP_HI(%a6),ETEMP_HI(%a1) //frame to busy frame - movel ETEMP_LO(%a6),ETEMP_LO(%a1) + movel ETEMP_LO(%a6),ETEMP_LO(%a1) movel CMDREG1B(%a6),CMDREG1B(%a1) //set inst in frame to unimp movel CMDREG1B(%a6),%d0 //fix cmd1b to make it andl #0x03c30000,%d0 //work for cmd3b bfextu CMDREG1B(%a6){#13:#1},%d1 //extract bit 2 - lsll #5,%d1 + lsll #5,%d1 swap %d1 orl %d1,%d0 //put it in the right place bfextu CMDREG1B(%a6){#10:#3},%d1 //extract bit 3,4,5 @@ -88,7 +88,7 @@ gen_except: // // Or in the FPSR from the emulation with the USER_FPSR on the stack. // - fmovel %FPSR,%d0 + fmovel %FPSR,%d0 orl %d0,USER_FPSR(%a6) movel USER_FPSR(%a6),FPSR_SHADOW(%a1) //set exc bits orl #sx_mask,E_BYTE(%a1) @@ -110,7 +110,7 @@ test_rev: cmpib #UNIMP_41_SIZE-4,1(%a7) //test for rev unimp frame bnel fpsp_fmt_error //if not $28 or $30 leal UNIMP_41_SIZE+LOCAL_SIZE(%a7),%a1 - + unimp_con: // // Fix up the new unimp frame with entries from the old unimp frame @@ -119,23 +119,23 @@ unimp_con: // // Or in the FPSR from the emulation with the USER_FPSR on the stack. // - fmovel %FPSR,%d0 + fmovel %FPSR,%d0 orl %d0,USER_FPSR(%a6) bra do_clean // // Frame is idle, so check for exceptions reported through -// USER_FPSR and set the unimp frame accordingly. +// USER_FPSR and set the unimp frame accordingly. // A7 must be incremented to the point before the // idle fsave vector to the unimp vector. // - + do_check: addl #4,%a7 //point A7 back to unimp frame // // Or in the FPSR from the emulation with the USER_FPSR on the stack. // - fmovel %FPSR,%d0 + fmovel %FPSR,%d0 orl %d0,USER_FPSR(%a6) // // On a busy frame, we must clear the nmnexc bits. @@ -167,10 +167,10 @@ frame_com: bsun_exc: bra do_clean // -// The typical work to be done to the unimp frame to report an +// The typical work to be done to the unimp frame to report an // exception is to set the E1/E3 byte and clr the U flag. -// commonE1 does this for E1 exceptions, which are snan, -// operr, and dz. commonE3 does this for E3 exceptions, which +// commonE1 does this for E1 exceptions, which are snan, +// operr, and dz. commonE3 does this for E3 exceptions, which // are inex2 and inex1, and also clears the E1 exception bit // left over from the unimp exception. // @@ -188,7 +188,7 @@ uniE3: unsE3: tstb RES_FLG(%a6) - bnes unsE3_0 + bnes unsE3_0 unsE3_1: bsetb #E3,E_BYTE(%a6) //set E3 flag unsE3_0: @@ -196,7 +196,7 @@ unsE3_0: movel CMDREG1B(%a6),%d0 andl #0x03c30000,%d0 //work for cmd3b bfextu CMDREG1B(%a6){#13:#1},%d1 //extract bit 2 - lsll #5,%d1 + lsll #5,%d1 swap %d1 orl %d1,%d0 //put it in the right place bfextu CMDREG1B(%a6){#10:#3},%d1 //extract bit 3,4,5 @@ -220,8 +220,8 @@ no_match: beqs no_exc //if clear, exit bras ovfl_unfl //go to unfl_ovfl to determine if // ;it is an unsupp or unimp exc - -// No exceptions are to be reported. If the instruction was + +// No exceptions are to be reported. If the instruction was // unimplemented, no FPU restore is necessary. If it was // unsupported, we must perform the restore. no_exc: @@ -245,13 +245,13 @@ uni_no_exc: // // Unimplemented Instruction Handler: // Ovfl: -// Only scosh, setox, ssinh, stwotox, and scale can set overflow in +// Only scosh, setox, ssinh, stwotox, and scale can set overflow in // this manner. // Unfl: // Stwotox, setox, and scale can set underflow in this manner. // Any of the other Library Routines such that f(x)=x in which -// x is an extended denorm can report an underflow exception. -// It is the responsibility of the exception-causing exception +// x is an extended denorm can report an underflow exception. +// It is the responsibility of the exception-causing exception // to make sure that WBTEMP is correct. // // The exceptional operand is in FP_SCR1. @@ -308,7 +308,7 @@ busy_fr: movel CMDREG1B(%a6),%d0 //fix cmd1b to make it andl #0x03c30000,%d0 //work for cmd3b bfextu CMDREG1B(%a6){#13:#1},%d1 //extract bit 2 - lsll #5,%d1 + lsll #5,%d1 swap %d1 orl %d1,%d0 //put it in the right place bfextu CMDREG1B(%a6){#10:#3},%d1 //extract bit 3,4,5 @@ -320,10 +320,10 @@ busy_fr: // // Check if the frame to be restored is busy or unimp. //** NOTE *** Bug fix for errata (0d43b #3) -// If the frame is unimp, we must create a busy frame to +// If the frame is unimp, we must create a busy frame to // fix the bug with the nmnexc bits in cases in which they // are set by a previous instruction and not cleared by -// the save. The frame will be unimp only if the final +// the save. The frame will be unimp only if the final // instruction in an emulation routine caused the exception // by doing an fmove <ea>,fp0. The exception operand, in // internal format, is in fptemp. @@ -364,7 +364,7 @@ loop2: bfins %d0,NMCEXC(%a1){#4:#4} //and insert them in nmcexc movel USER_FPSR(%a6),FPSR_SHADOW(%a1) //set exc bits orl #sx_mask,E_BYTE(%a1) - + do_restore: moveml USER_DA(%a6),%d0-%d1/%a0-%a1 fmovemx USER_FP0(%a6),%fp0-%fp3 @@ -376,10 +376,10 @@ do_restore: cont: unlk %a6 // -// If trace mode enabled, then go to trace handler. This handler -// cannot have any fp instructions. If there are fp inst's and an -// exception has been restored into the machine then the exception -// will occur upon execution of the fp inst. This is not desirable +// If trace mode enabled, then go to trace handler. This handler +// cannot have any fp instructions. If there are fp inst's and an +// exception has been restored into the machine then the exception +// will occur upon execution of the fp inst. This is not desirable // in the kernel (supervisor mode). See MC68040 manual Section 9.3.8. // finish_up: @@ -438,12 +438,12 @@ loop40: clrl -(%sp) movel USER_D1(%a6),%d1 // restore d1 movel #0x40280000,-(%sp) frestore (%sp)+ - unlk %a5 + unlk %a5 rts frame_41: tstb 1(%sp) // check to see if idle - bne notidle + bne notidle idle41: clrl (%sp) // get rid of old fsave frame movel %d1,USER_D1(%a6) // save d1 @@ -453,18 +453,18 @@ loop41: clrl -(%sp) movel USER_D1(%a6),%d1 // restore d1 movel #0x41300000,-(%sp) frestore (%sp)+ - unlk %a5 + unlk %a5 rts notidle: - bclrb #etemp15_bit,-40(%a5) + bclrb #etemp15_bit,-40(%a5) frestore (%sp)+ - unlk %a5 + unlk %a5 rts nofix: frestore (%sp)+ - unlk %a5 + unlk %a5 rts |end |