| 1 | /* i80386 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract |
|---|
| 2 | the result from a second limb vector. |
|---|
| 3 | Copyright (C) 1992-2024 Free Software Foundation, Inc. |
|---|
| 4 | This file is part of the GNU MP Library. |
|---|
| 5 | |
|---|
| 6 | The GNU MP Library is free software; you can redistribute it and/or modify |
|---|
| 7 | it under the terms of the GNU Lesser General Public License as published by |
|---|
| 8 | the Free Software Foundation; either version 2.1 of the License, or (at your |
|---|
| 9 | option) any later version. |
|---|
| 10 | |
|---|
| 11 | The GNU MP Library is distributed in the hope that it will be useful, but |
|---|
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
|---|
| 13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
|---|
| 14 | License for more details. |
|---|
| 15 | |
|---|
| 16 | You should have received a copy of the GNU Lesser General Public License |
|---|
| 17 | along with the GNU MP Library; see the file COPYING.LIB. If not, |
|---|
| 18 | see <https://www.gnu.org/licenses/>. */ |
|---|
| 19 | |
|---|
| 20 | #include "sysdep.h" |
|---|
| 21 | #include "asm-syntax.h" |
|---|
| 22 | |
|---|
| 23 | #define PARMS 4+16 /* space for 4 saved regs */ |
|---|
| 24 | #define RES PARMS |
|---|
| 25 | #define S1 RES+4 |
|---|
| 26 | #define SIZE S1+4 |
|---|
| 27 | #define S2LIMB SIZE+4 |
|---|
| 28 | |
|---|
| 29 | #define res_ptr edi |
|---|
| 30 | #define s1_ptr esi |
|---|
| 31 | #define sizeP ecx |
|---|
| 32 | #define s2_limb ebx |
|---|
| 33 | |
|---|
| 34 | .text |
|---|
| 35 | ENTRY (__mpn_submul_1) |
|---|
| 36 | |
|---|
| 37 | pushl %edi |
|---|
| 38 | cfi_adjust_cfa_offset (4) |
|---|
| 39 | pushl %esi |
|---|
| 40 | cfi_adjust_cfa_offset (4) |
|---|
| 41 | pushl %ebp |
|---|
| 42 | cfi_adjust_cfa_offset (4) |
|---|
| 43 | pushl %ebx |
|---|
| 44 | cfi_adjust_cfa_offset (4) |
|---|
| 45 | cfi_rel_offset (edi, 12) |
|---|
| 46 | cfi_rel_offset (esi, 8) |
|---|
| 47 | cfi_rel_offset (ebp, 4) |
|---|
| 48 | cfi_rel_offset (ebx, 0) |
|---|
| 49 | |
|---|
| 50 | movl RES(%esp), %res_ptr |
|---|
| 51 | movl S1(%esp), %s1_ptr |
|---|
| 52 | movl SIZE(%esp), %sizeP |
|---|
| 53 | movl S2LIMB(%esp), %s2_limb |
|---|
| 54 | leal (%res_ptr,%sizeP,4), %res_ptr |
|---|
| 55 | leal (%s1_ptr,%sizeP,4), %s1_ptr |
|---|
| 56 | negl %sizeP |
|---|
| 57 | xorl %ebp, %ebp |
|---|
| 58 | ALIGN (3) |
|---|
| 59 | L(oop): |
|---|
| 60 | movl (%s1_ptr,%sizeP,4), %eax |
|---|
| 61 | mull %s2_limb |
|---|
| 62 | addl %ebp, %eax |
|---|
| 63 | adcl $0, %edx |
|---|
| 64 | subl %eax, (%res_ptr,%sizeP,4) |
|---|
| 65 | adcl $0, %edx |
|---|
| 66 | movl %edx, %ebp |
|---|
| 67 | |
|---|
| 68 | incl %sizeP |
|---|
| 69 | jnz L(oop) |
|---|
| 70 | movl %ebp, %eax |
|---|
| 71 | |
|---|
| 72 | popl %ebx |
|---|
| 73 | cfi_adjust_cfa_offset (-4) |
|---|
| 74 | cfi_restore (ebx) |
|---|
| 75 | popl %ebp |
|---|
| 76 | cfi_adjust_cfa_offset (-4) |
|---|
| 77 | cfi_restore (ebp) |
|---|
| 78 | popl %esi |
|---|
| 79 | cfi_adjust_cfa_offset (-4) |
|---|
| 80 | cfi_restore (esi) |
|---|
| 81 | popl %edi |
|---|
| 82 | cfi_adjust_cfa_offset (-4) |
|---|
| 83 | cfi_restore (edi) |
|---|
| 84 | |
|---|
| 85 | ret |
|---|
| 86 | END (__mpn_submul_1) |
|---|
| 87 | |
|---|
