* MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP * M68000 Hi-Performance Microprocessor Division * M68040 Software Package * * M68040 Software Package Copyright (c) 1993, 1994 Motorola Inc. * All rights reserved. * * THE SOFTWARE is provided on an "AS IS" basis and without warranty. * To the maximum extent permitted by applicable law, * MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A * PARTICULAR PURPOSE and any warranty against infringement with * regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF) * and any accompanying written materials. * * To the maximum extent permitted by applicable law, * IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER * (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS * PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR * OTHER PECUNIARY LOSS) ARISING OF THE USE OR INABILITY TO USE THE * SOFTWARE. Motorola assumes no responsibility for the maintenance * and support of the SOFTWARE. * * You are hereby granted a copyright license to use, modify, and * distribute the SOFTWARE so long as this entire notice is retained * without alteration in any modified and/or redistributed versions, * and that such modified versions are clearly identified as such. * No licenses are granted by implication, estoppel or otherwise * under any patents or trademarks of Motorola, Inc. * * MONADIC.GCC --- MONADIC template for GCC compiler * * This is based on the generic template. The only difference is that * GCC does not need the d0-d1/a0-a1 registers saved. * * Customizations: * 2. Likewise, don't save FP0/FP1 if they are scratch * registers. * 3. Delete handling of the fpsr if you only care about * the result. * 5. Move the result to d0/d1 if the compiler is that old. * xref tag xref _OPr_ xref _OPz_ xref _OPi_ xref _OPn_ xref _OPm_ xdef _OPs_ _OPs_: link a6,#-LOCAL_SIZE fmovem.x fp0-fp3,USER_FP0(a6) fmove.l fpsr,USER_FPSR(a6) fmove.l fpcr,USER_FPCR(a6) fmove.l fpcr,d1 ; user's rounding mode/precision fmove.l #0,fpcr ; force rounding mode/prec to extended,rn * * copy, convert and tag input argument * fmove.s 8(a6),fp0 fmove.x fp0,ETEMP(a6) lea ETEMP(a6),a0 bsr tag move.b d0,STAG(a6) tst.b d0 bne.b _TMP_2 bsr _OPr_ ; normalized (regular) number bra.b _TMP_6 _TMP_2: cmp.b #$20,d0 ; zero? bne.b _TMP_3 bsr _OPz_ bra.b _TMP_6 _TMP_3: cmp.b #$40,d0 ; infinity? bne.b _TMP_4 bsr _OPi_ bra.b _TMP_6 _TMP_4: cmp.b #$60,d0 ; NaN? bne.b _TMP_5 bsr _OPn_ bra.b _TMP_6 _TMP_5: bsr _OPm_ ; assuming a denorm... _TMP_6: fmove.l fpsr,d0 ; update status register or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions fmove.l d0,fpsr * * Result is now in FP0 * fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored fmove.l USER_FPCR(a6),fpcr ; fpcr restored unlk a6 rts xdef _OPd_ _OPd_: link a6,#-LOCAL_SIZE fmovem.x fp0-fp3,USER_FP0(a6) fmove.l fpsr,USER_FPSR(a6) fmove.l fpcr,USER_FPCR(a6) fmove.l fpcr,d1 ; user's rounding mode/precision fmove.l #0,fpcr ; force rounding mode/prec to extended,rn * * copy, convert and tag input argument * fmove.d 8(a6),fp0 fmove.x fp0,ETEMP(a6) lea ETEMP(a6),a0 bsr tag move.b d0,STAG(a6) tst.b d0 bne.b _TMP_7 bsr _OPr_ ; normalized (regular) number bra.b _TMP_B _TMP_7: cmp.b #$20,d0 ; zero? bne.b _TMP_8 bsr _OPz_ bra.b _TMP_B _TMP_8: cmp.b #$40,d0 ; infinity? bne.b _TMP_9 bsr _OPi_ bra.b _TMP_B _TMP_9: cmp.b #$60,d0 ; NaN? bne.b _TMP_A bsr _OPn_ bra.b _TMP_B _TMP_A: bsr _OPm_ ; assuming a denorm... _TMP_B: fmove.l fpsr,d0 ; update status register or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions fmove.l d0,fpsr * * Result is now in FP0 * fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored fmove.l USER_FPCR(a6),fpcr ; fpcr restored unlk a6 rts xdef _OPx_ _OPx_: link a6,#-LOCAL_SIZE fmovem.x fp0-fp3,USER_FP0(a6) fmove.l fpsr,USER_FPSR(a6) fmove.l fpcr,USER_FPCR(a6) fmove.l fpcr,d1 ; user's rounding mode/precision fmove.l #0,fpcr ; force rounding mode/prec to extended,rn * * copy, convert and tag input argument * fmove.x 8(a6),fp0 fmove.x fp0,ETEMP(a6) lea ETEMP(a6),a0 bsr tag move.b d0,STAG(a6) tst.b d0 bne.b _TMP_C bsr _OPr_ ; normalized (regular) number bra.b _TMP_G _TMP_C: cmp.b #$20,d0 ; zero? bne.b _TMP_D bsr _OPz_ bra.b _TMP_G _TMP_D: cmp.b #$40,d0 ; infinity? bne.b _TMP_E bsr _OPi_ bra.b _TMP_G _TMP_E: cmp.b #$60,d0 ; NaN? bne.b _TMP_F bsr _OPn_ bra.b _TMP_G _TMP_F: bsr _OPm_ ; assuming a denorm... _TMP_G: fmove.l fpsr,d0 ; update status register or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions fmove.l d0,fpsr * * Result is now in FP0 * fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored fmove.l USER_FPCR(a6),fpcr ; fpcr restored unlk a6 rts