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87 lines
2.1 KiB
ArmAsm
87 lines
2.1 KiB
ArmAsm
/* i80386 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
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the result from a second limb vector.
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Copyright (C) 1992-2020 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not,
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see <https://www.gnu.org/licenses/>. */
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#include "sysdep.h"
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#include "asm-syntax.h"
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#define PARMS 4+16 /* space for 4 saved regs */
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#define RES PARMS
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#define S1 RES+4
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#define SIZE S1+4
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#define S2LIMB SIZE+4
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#define res_ptr edi
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#define s1_ptr esi
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#define sizeP ecx
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#define s2_limb ebx
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.text
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ENTRY (__mpn_submul_1)
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pushl %edi
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cfi_adjust_cfa_offset (4)
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pushl %esi
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cfi_adjust_cfa_offset (4)
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pushl %ebp
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cfi_adjust_cfa_offset (4)
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pushl %ebx
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (edi, 12)
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cfi_rel_offset (esi, 8)
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cfi_rel_offset (ebp, 4)
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cfi_rel_offset (ebx, 0)
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movl RES(%esp), %res_ptr
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movl S1(%esp), %s1_ptr
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movl SIZE(%esp), %sizeP
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movl S2LIMB(%esp), %s2_limb
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leal (%res_ptr,%sizeP,4), %res_ptr
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leal (%s1_ptr,%sizeP,4), %s1_ptr
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negl %sizeP
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xorl %ebp, %ebp
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ALIGN (3)
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L(oop):
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movl (%s1_ptr,%sizeP,4), %eax
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mull %s2_limb
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addl %ebp, %eax
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adcl $0, %edx
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subl %eax, (%res_ptr,%sizeP,4)
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adcl $0, %edx
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movl %edx, %ebp
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incl %sizeP
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jnz L(oop)
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movl %ebp, %eax
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popl %ebx
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cfi_adjust_cfa_offset (-4)
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cfi_restore (ebx)
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popl %ebp
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cfi_adjust_cfa_offset (-4)
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cfi_restore (ebp)
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popl %esi
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cfi_adjust_cfa_offset (-4)
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cfi_restore (esi)
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popl %edi
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cfi_adjust_cfa_offset (-4)
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cfi_restore (edi)
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ret
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END (__mpn_submul_1)
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