diff options
Diffstat (limited to 'REORG.TODO/sysdeps/i386/i586/sub_n.S')
| -rw-r--r-- | REORG.TODO/sysdeps/i386/i586/sub_n.S | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/i386/i586/sub_n.S b/REORG.TODO/sysdeps/i386/i586/sub_n.S new file mode 100644 index 0000000000..21b5a2742c --- /dev/null +++ b/REORG.TODO/sysdeps/i386/i586/sub_n.S @@ -0,0 +1,143 @@ +/* Pentium __mpn_sub_n -- Subtract two limb vectors of the same length > 0 + and store difference in a third limb vector. + Copyright (C) 1992-2017 Free Software Foundation, Inc. + This file is part of the GNU MP Library. + + The GNU MP Library is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or (at your + option) any later version. + + The GNU MP Library is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with the GNU MP Library; see the file COPYING.LIB. If not, + see <http://www.gnu.org/licenses/>. */ + +#include "sysdep.h" +#include "asm-syntax.h" + +#define PARMS 4+16 /* space for 4 saved regs */ +#define RES PARMS +#define S1 RES+4 +#define S2 S1+4 +#define SIZE S2+4 + + .text +ENTRY (__mpn_sub_n) + + pushl %edi + cfi_adjust_cfa_offset (4) + pushl %esi + cfi_adjust_cfa_offset (4) + pushl %ebp + cfi_adjust_cfa_offset (4) + pushl %ebx + cfi_adjust_cfa_offset (4) + + movl RES(%esp),%edi + cfi_rel_offset (edi, 12) + movl S1(%esp),%esi + cfi_rel_offset (esi, 8) + movl S2(%esp),%ebx + cfi_rel_offset (ebx, 0) + movl SIZE(%esp),%ecx + movl (%ebx),%ebp + cfi_rel_offset (ebp, 4) + + decl %ecx + movl %ecx,%edx + shrl $3,%ecx + andl $7,%edx + testl %ecx,%ecx /* zero carry flag */ + jz L(end) + pushl %edx + cfi_adjust_cfa_offset (4) + + ALIGN (3) +L(oop): movl 28(%edi),%eax /* fetch destination cache line */ + leal 32(%edi),%edi + +L(1): movl (%esi),%eax + movl 4(%esi),%edx + sbbl %ebp,%eax + movl 4(%ebx),%ebp + sbbl %ebp,%edx + movl 8(%ebx),%ebp + movl %eax,-32(%edi) + movl %edx,-28(%edi) + +L(2): movl 8(%esi),%eax + movl 12(%esi),%edx + sbbl %ebp,%eax + movl 12(%ebx),%ebp + sbbl %ebp,%edx + movl 16(%ebx),%ebp + movl %eax,-24(%edi) + movl %edx,-20(%edi) + +L(3): movl 16(%esi),%eax + movl 20(%esi),%edx + sbbl %ebp,%eax + movl 20(%ebx),%ebp + sbbl %ebp,%edx + movl 24(%ebx),%ebp + movl %eax,-16(%edi) + movl %edx,-12(%edi) + +L(4): movl 24(%esi),%eax + movl 28(%esi),%edx + sbbl %ebp,%eax + movl 28(%ebx),%ebp + sbbl %ebp,%edx + movl 32(%ebx),%ebp + movl %eax,-8(%edi) + movl %edx,-4(%edi) + + leal 32(%esi),%esi + leal 32(%ebx),%ebx + decl %ecx + jnz L(oop) + + popl %edx + cfi_adjust_cfa_offset (-4) +L(end): + decl %edx /* test %edx w/o clobbering carry */ + js L(end2) + incl %edx +L(oop2): + leal 4(%edi),%edi + movl (%esi),%eax + sbbl %ebp,%eax + movl 4(%ebx),%ebp + movl %eax,-4(%edi) + leal 4(%esi),%esi + leal 4(%ebx),%ebx + decl %edx + jnz L(oop2) +L(end2): + movl (%esi),%eax + sbbl %ebp,%eax + movl %eax,(%edi) + + sbbl %eax,%eax + negl %eax + + popl %ebx + cfi_adjust_cfa_offset (-4) + cfi_restore (ebx) + popl %ebp + cfi_adjust_cfa_offset (-4) + cfi_restore (ebp) + popl %esi + cfi_adjust_cfa_offset (-4) + cfi_restore (esi) + popl %edi + cfi_adjust_cfa_offset (-4) + cfi_restore (edi) + + ret +END (__mpn_sub_n) |