Annotation of OpenXM/src/kan96xx/gmp-2.0.2/mpn/x86/pentium/sub_n.S, Revision 1.1
1.1 ! maekawa 1: /* Pentium __mpn_sub_n -- Subtract two limb vectors of the same length > 0
! 2: and store difference in a third limb vector.
! 3:
! 4: Copyright (C) 1992, 1994, 1995, 1996 Free Software Foundation, Inc.
! 5:
! 6: This file is part of the GNU MP Library.
! 7:
! 8: The GNU MP Library is free software; you can redistribute it and/or modify
! 9: it under the terms of the GNU Library General Public License as published by
! 10: the Free Software Foundation; either version 2 of the License, or (at your
! 11: option) any later version.
! 12:
! 13: The GNU MP Library is distributed in the hope that it will be useful, but
! 14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 15: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
! 16: License for more details.
! 17:
! 18: You should have received a copy of the GNU Library General Public License
! 19: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! 20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 21: MA 02111-1307, USA. */
! 22:
! 23: /*
! 24: INPUT PARAMETERS
! 25: res_ptr (sp + 4)
! 26: s1_ptr (sp + 8)
! 27: s2_ptr (sp + 12)
! 28: size (sp + 16)
! 29: */
! 30:
! 31: #include "sysdep.h"
! 32: #include "asm-syntax.h"
! 33:
! 34: .text
! 35: ALIGN (3)
! 36: .globl C_SYMBOL_NAME(__mpn_sub_n)
! 37: C_SYMBOL_NAME(__mpn_sub_n:)
! 38: pushl %edi
! 39: pushl %esi
! 40: pushl %ebx
! 41: pushl %ebp
! 42:
! 43: movl 20(%esp),%edi /* res_ptr */
! 44: movl 24(%esp),%esi /* s1_ptr */
! 45: movl 28(%esp),%ebp /* s2_ptr */
! 46: movl 32(%esp),%ecx /* size */
! 47:
! 48: movl (%ebp),%ebx
! 49:
! 50: decl %ecx
! 51: movl %ecx,%edx
! 52: shrl $3,%ecx
! 53: andl $7,%edx
! 54: testl %ecx,%ecx /* zero carry flag */
! 55: jz Lend
! 56: pushl %edx
! 57:
! 58: ALIGN (3)
! 59: Loop: movl 28(%edi),%eax /* fetch destination cache line */
! 60: leal 32(%edi),%edi
! 61:
! 62: L1: movl (%esi),%eax
! 63: movl 4(%esi),%edx
! 64: sbbl %ebx,%eax
! 65: movl 4(%ebp),%ebx
! 66: sbbl %ebx,%edx
! 67: movl 8(%ebp),%ebx
! 68: movl %eax,-32(%edi)
! 69: movl %edx,-28(%edi)
! 70:
! 71: L2: movl 8(%esi),%eax
! 72: movl 12(%esi),%edx
! 73: sbbl %ebx,%eax
! 74: movl 12(%ebp),%ebx
! 75: sbbl %ebx,%edx
! 76: movl 16(%ebp),%ebx
! 77: movl %eax,-24(%edi)
! 78: movl %edx,-20(%edi)
! 79:
! 80: L3: movl 16(%esi),%eax
! 81: movl 20(%esi),%edx
! 82: sbbl %ebx,%eax
! 83: movl 20(%ebp),%ebx
! 84: sbbl %ebx,%edx
! 85: movl 24(%ebp),%ebx
! 86: movl %eax,-16(%edi)
! 87: movl %edx,-12(%edi)
! 88:
! 89: L4: movl 24(%esi),%eax
! 90: movl 28(%esi),%edx
! 91: sbbl %ebx,%eax
! 92: movl 28(%ebp),%ebx
! 93: sbbl %ebx,%edx
! 94: movl 32(%ebp),%ebx
! 95: movl %eax,-8(%edi)
! 96: movl %edx,-4(%edi)
! 97:
! 98: leal 32(%esi),%esi
! 99: leal 32(%ebp),%ebp
! 100: decl %ecx
! 101: jnz Loop
! 102:
! 103: popl %edx
! 104: Lend:
! 105: decl %edx /* test %edx w/o clobbering carry */
! 106: js Lend2
! 107: incl %edx
! 108: Loop2:
! 109: leal 4(%edi),%edi
! 110: movl (%esi),%eax
! 111: sbbl %ebx,%eax
! 112: movl 4(%ebp),%ebx
! 113: movl %eax,-4(%edi)
! 114: leal 4(%esi),%esi
! 115: leal 4(%ebp),%ebp
! 116: decl %edx
! 117: jnz Loop2
! 118: Lend2:
! 119: movl (%esi),%eax
! 120: sbbl %ebx,%eax
! 121: movl %eax,(%edi)
! 122:
! 123: sbbl %eax,%eax
! 124: negl %eax
! 125:
! 126: popl %ebp
! 127: popl %ebx
! 128: popl %esi
! 129: popl %edi
! 130: ret
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