aors_n.asm
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上传日期:2022-08-06
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- dnl Intel P6-15 mpn_add_n/mpn_sub_n -- mpn add or subtract.
- dnl Copyright 2006, 2007 Free Software Foundation, Inc.
- dnl This file is part of the GNU MP Library.
- dnl The GNU MP Library is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU Lesser General Public License as published
- dnl by the Free Software Foundation; either version 3 of the License, or (at
- dnl your option) any later version.
- dnl The GNU MP Library is distributed in the hope that it will be useful, but
- dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- dnl License for more details.
- dnl You should have received a copy of the GNU Lesser General Public License
- dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
- include(`../config.m4')
- C cycles/limb
- C K8,K9: 2.25
- C K10: 2
- C P4: 10
- C P6 core2: 2.05
- C P6 corei7: 2.3
- C INPUT PARAMETERS
- define(`rp', `%rdi')
- define(`up', `%rsi')
- define(`vp', `%rdx')
- define(`n', `%rcx')
- define(`cy', `%r8')
- ifdef(`OPERATION_add_n', `
- define(ADCSBB, adc)
- define(func, mpn_add_n)
- define(func_nc, mpn_add_nc)')
- ifdef(`OPERATION_sub_n', `
- define(ADCSBB, sbb)
- define(func, mpn_sub_n)
- define(func_nc, mpn_sub_nc)')
- MULFUNC_PROLOGUE(mpn_add_n mpn_add_nc mpn_sub_n mpn_sub_nc)
- ASM_START()
- TEXT
- ALIGN(16)
- PROLOGUE(func_nc)
- jmp L(start)
- EPILOGUE()
- PROLOGUE(func)
- xor %r8, %r8
- L(start):
- mov (up), %r10
- mov (vp), %r11
- lea -8(up,n,8), up
- lea -8(vp,n,8), vp
- lea -16(rp,n,8), rp
- mov %ecx, %eax
- neg n
- and $3, %eax
- je L(b00)
- add %rax, n C clear low rcx bits for jrcxz
- cmp $2, %eax
- jl L(b01)
- je L(b10)
- L(b11): shr %r8 C set cy
- jmp L(e11)
- L(b00): shr %r8 C set cy
- mov %r10, %r8
- mov %r11, %r9
- lea 4(n), n
- jmp L(e00)
- L(b01): shr %r8 C set cy
- jmp L(e01)
- L(b10): shr %r8 C set cy
- mov %r10, %r8
- mov %r11, %r9
- jmp L(e10)
- L(end): ADCSBB %r11, %r10
- mov %r10, 8(rp)
- mov %ecx, %eax C clear eax, ecx contains 0
- adc %eax, %eax
- ret
- ALIGN(16)
- L(top):
- mov -24(up,n,8), %r8
- mov -24(vp,n,8), %r9
- ADCSBB %r11, %r10
- mov %r10, -24(rp,n,8)
- L(e00):
- mov -16(up,n,8), %r10
- mov -16(vp,n,8), %r11
- ADCSBB %r9, %r8
- mov %r8, -16(rp,n,8)
- L(e11):
- mov -8(up,n,8), %r8
- mov -8(vp,n,8), %r9
- ADCSBB %r11, %r10
- mov %r10, -8(rp,n,8)
- L(e10):
- mov (up,n,8), %r10
- mov (vp,n,8), %r11
- ADCSBB %r9, %r8
- mov %r8, (rp,n,8)
- L(e01):
- jrcxz L(end)
- lea 4(n), n
- jmp L(top)
- EPILOGUE()