Annotation of sys/arch/m68k/fpsp/MONADIC.GCC, Revision 1.1
1.1 ! nbrk 1: * $OpenBSD: MONADIC.GCC,v 1.2 1996/05/29 21:05:22 niklas Exp $
! 2: * $NetBSD: MONADIC.GCC,v 1.2 1994/10/26 07:48:40 cgd Exp $
! 3:
! 4: * MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
! 5: * M68000 Hi-Performance Microprocessor Division
! 6: * M68040 Software Package
! 7: *
! 8: * M68040 Software Package Copyright (c) 1993, 1994 Motorola Inc.
! 9: * All rights reserved.
! 10: *
! 11: * THE SOFTWARE is provided on an "AS IS" basis and without warranty.
! 12: * To the maximum extent permitted by applicable law,
! 13: * MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
! 14: * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
! 15: * PARTICULAR PURPOSE and any warranty against infringement with
! 16: * regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF)
! 17: * and any accompanying written materials.
! 18: *
! 19: * To the maximum extent permitted by applicable law,
! 20: * IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
! 21: * (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS
! 22: * PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR
! 23: * OTHER PECUNIARY LOSS) ARISING OF THE USE OR INABILITY TO USE THE
! 24: * SOFTWARE. Motorola assumes no responsibility for the maintenance
! 25: * and support of the SOFTWARE.
! 26: *
! 27: * You are hereby granted a copyright license to use, modify, and
! 28: * distribute the SOFTWARE so long as this entire notice is retained
! 29: * without alteration in any modified and/or redistributed versions,
! 30: * and that such modified versions are clearly identified as such.
! 31: * No licenses are granted by implication, estoppel or otherwise
! 32: * under any patents or trademarks of Motorola, Inc.
! 33:
! 34: *
! 35: * MONADIC.GCC --- MONADIC template for GCC compiler
! 36: *
! 37: * This is based on the generic template. The only difference is that
! 38: * GCC does not need the d0-d1/a0-a1 registers saved.
! 39: *
! 40: * Customizations:
! 41: * 2. Likewise, don't save FP0/FP1 if they are scratch
! 42: * registers.
! 43: * 3. Delete handling of the fpsr if you only care about
! 44: * the result.
! 45: * 5. Move the result to d0/d1 if the compiler is that old.
! 46: *
! 47:
! 48: xref tag
! 49: xref _OPr_
! 50: xref _OPz_
! 51: xref _OPi_
! 52: xref _OPn_
! 53: xref _OPm_
! 54:
! 55: xdef _OPs_
! 56: _OPs_:
! 57: link a6,#-LOCAL_SIZE
! 58: fmovem.x fp0-fp3,USER_FP0(a6)
! 59: fmove.l fpsr,USER_FPSR(a6)
! 60: fmove.l fpcr,USER_FPCR(a6)
! 61: fmove.l fpcr,d1 ; user's rounding mode/precision
! 62: fmove.l #0,fpcr ; force rounding mode/prec to extended,rn
! 63: *
! 64: * copy, convert and tag input argument
! 65: *
! 66: fmove.s 8(a6),fp0
! 67: fmove.x fp0,ETEMP(a6)
! 68: lea ETEMP(a6),a0
! 69: bsr tag
! 70: move.b d0,STAG(a6)
! 71: tst.b d0
! 72: bne.b _TMP_2
! 73: bsr _OPr_ ; normalized (regular) number
! 74: bra.b _TMP_6
! 75: _TMP_2:
! 76: cmp.b #$20,d0 ; zero?
! 77: bne.b _TMP_3
! 78: bsr _OPz_
! 79: bra.b _TMP_6
! 80: _TMP_3:
! 81: cmp.b #$40,d0 ; infinity?
! 82: bne.b _TMP_4
! 83: bsr _OPi_
! 84: bra.b _TMP_6
! 85: _TMP_4:
! 86: cmp.b #$60,d0 ; NaN?
! 87: bne.b _TMP_5
! 88: bsr _OPn_
! 89: bra.b _TMP_6
! 90: _TMP_5:
! 91: bsr _OPm_ ; assuming a denorm...
! 92:
! 93: _TMP_6:
! 94: fmove.l fpsr,d0 ; update status register
! 95: or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions
! 96: fmove.l d0,fpsr
! 97: *
! 98: * Result is now in FP0
! 99: *
! 100: fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
! 101: fmove.l USER_FPCR(a6),fpcr ; fpcr restored
! 102: unlk a6
! 103: rts
! 104:
! 105: xdef _OPd_
! 106: _OPd_:
! 107: link a6,#-LOCAL_SIZE
! 108: fmovem.x fp0-fp3,USER_FP0(a6)
! 109: fmove.l fpsr,USER_FPSR(a6)
! 110: fmove.l fpcr,USER_FPCR(a6)
! 111: fmove.l fpcr,d1 ; user's rounding mode/precision
! 112: fmove.l #0,fpcr ; force rounding mode/prec to extended,rn
! 113: *
! 114: * copy, convert and tag input argument
! 115: *
! 116: fmove.d 8(a6),fp0
! 117: fmove.x fp0,ETEMP(a6)
! 118: lea ETEMP(a6),a0
! 119: bsr tag
! 120: move.b d0,STAG(a6)
! 121: tst.b d0
! 122: bne.b _TMP_7
! 123: bsr _OPr_ ; normalized (regular) number
! 124: bra.b _TMP_B
! 125: _TMP_7:
! 126: cmp.b #$20,d0 ; zero?
! 127: bne.b _TMP_8
! 128: bsr _OPz_
! 129: bra.b _TMP_B
! 130: _TMP_8:
! 131: cmp.b #$40,d0 ; infinity?
! 132: bne.b _TMP_9
! 133: bsr _OPi_
! 134: bra.b _TMP_B
! 135: _TMP_9:
! 136: cmp.b #$60,d0 ; NaN?
! 137: bne.b _TMP_A
! 138: bsr _OPn_
! 139: bra.b _TMP_B
! 140: _TMP_A:
! 141: bsr _OPm_ ; assuming a denorm...
! 142:
! 143: _TMP_B:
! 144: fmove.l fpsr,d0 ; update status register
! 145: or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions
! 146: fmove.l d0,fpsr
! 147: *
! 148: * Result is now in FP0
! 149: *
! 150: fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
! 151: fmove.l USER_FPCR(a6),fpcr ; fpcr restored
! 152: unlk a6
! 153: rts
! 154:
! 155: xdef _OPx_
! 156: _OPx_:
! 157: link a6,#-LOCAL_SIZE
! 158: fmovem.x fp0-fp3,USER_FP0(a6)
! 159: fmove.l fpsr,USER_FPSR(a6)
! 160: fmove.l fpcr,USER_FPCR(a6)
! 161: fmove.l fpcr,d1 ; user's rounding mode/precision
! 162: fmove.l #0,fpcr ; force rounding mode/prec to extended,rn
! 163: *
! 164: * copy, convert and tag input argument
! 165: *
! 166: fmove.x 8(a6),fp0
! 167: fmove.x fp0,ETEMP(a6)
! 168: lea ETEMP(a6),a0
! 169: bsr tag
! 170: move.b d0,STAG(a6)
! 171: tst.b d0
! 172: bne.b _TMP_C
! 173: bsr _OPr_ ; normalized (regular) number
! 174: bra.b _TMP_G
! 175: _TMP_C:
! 176: cmp.b #$20,d0 ; zero?
! 177: bne.b _TMP_D
! 178: bsr _OPz_
! 179: bra.b _TMP_G
! 180: _TMP_D:
! 181: cmp.b #$40,d0 ; infinity?
! 182: bne.b _TMP_E
! 183: bsr _OPi_
! 184: bra.b _TMP_G
! 185: _TMP_E:
! 186: cmp.b #$60,d0 ; NaN?
! 187: bne.b _TMP_F
! 188: bsr _OPn_
! 189: bra.b _TMP_G
! 190: _TMP_F:
! 191: bsr _OPm_ ; assuming a denorm...
! 192:
! 193: _TMP_G:
! 194: fmove.l fpsr,d0 ; update status register
! 195: or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions
! 196: fmove.l d0,fpsr
! 197: *
! 198: * Result is now in FP0
! 199: *
! 200: fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
! 201: fmove.l USER_FPCR(a6),fpcr ; fpcr restored
! 202: unlk a6
! 203: rts
! 204:
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