aors_n.asm
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上传日期:2022-08-06
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- dnl AMD64 mpn_add_n, mpn_sub_n
- dnl Copyright 2003, 2004, 2005, 2007, 2008 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: 1.5
- C K10: 1.5
- C P4: ?
- C P6 core2: 4.9
- C P6 corei7:
- C P6 atom: 4
- C The inner loop of this code is the result of running a code generation and
- C optimization tool suite written by David Harvey and Torbjorn Granlund.
- C INPUT PARAMETERS
- define(`rp', `%rdi')
- define(`up', `%rsi')
- define(`vp', `%rdx')
- define(`n', `%rcx')
- define(`cy', `%r8') C (only for mpn_add_nc)
- 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)
- mov R32(n), R32(%rax)
- and $3, R32(%rax)
- shr $2, n
- bt $0, %r8 C cy flag <- carry parameter
- jz L(1)
- jmp L(ent)
- EPILOGUE()
- ALIGN(16)
- PROLOGUE(func)
- mov R32(n), R32(%rax)
- shr $2, n
- jz L(0)
- and $3, R32(%rax)
- L(ent): mov (up), %r8
- mov 8(up), %r9
- dec n
- jmp L(mid)
- ALIGN(16)
- L(top): ADCSBB (vp), %r8
- ADCSBB 8(vp), %r9
- ADCSBB 16(vp), %r10
- ADCSBB 24(vp), %r11
- mov %r8, (rp)
- lea 32(up), up
- mov %r9, 8(rp)
- mov %r10, 16(rp)
- dec n
- mov %r11, 24(rp)
- lea 32(vp), vp
- mov (up), %r8
- mov 8(up), %r9
- lea 32(rp), rp
- L(mid): mov 16(up), %r10
- mov 24(up), %r11
- jnz L(top)
- L(end): lea 32(up), up
- ADCSBB (vp), %r8
- ADCSBB 8(vp), %r9
- ADCSBB 16(vp), %r10
- ADCSBB 24(vp), %r11
- lea 32(vp), vp
- mov %r8, (rp)
- mov %r9, 8(rp)
- mov %r10, 16(rp)
- mov %r11, 24(rp)
- lea 32(rp), rp
- inc R32(%rax)
- dec R32(%rax)
- jnz L(1)
- adc %eax, %eax
- ret
- L(0): test R32(%rax), R32(%rax)
- L(1): dec R32(%rax)
- mov (up), %r8
- jnz L(2)
- ADCSBB (vp), %r8
- mov %r8, (rp)
- adc %eax, %eax
- ret
- L(2): dec R32(%rax)
- mov 8(up), %r9
- jnz L(3)
- ADCSBB (vp), %r8
- ADCSBB 8(vp), %r9
- mov %r8, (rp)
- mov %r9, 8(rp)
- adc %eax, %eax
- ret
- L(3): mov 16(up), %r10
- ADCSBB (vp), %r8
- ADCSBB 8(vp), %r9
- ADCSBB 16(vp), %r10
- mov %r8, (rp)
- mov %r9, 8(rp)
- mov %r10, 16(rp)
- setc %al
- ret
- EPILOGUE()