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146 lines
2.9 KiB
NASM
146 lines
2.9 KiB
NASM
dnl AMD64 mpn_add_n, mpn_sub_n
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dnl Copyright 2003, 2004, 2005, 2007, 2008, 2010 Free Software Foundation,
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dnl Inc.
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dnl This file is part of the GNU MP Library.
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU Lesser General Public License as published
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dnl by the Free Software Foundation; either version 3 of the License, or (at
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dnl your option) any later version.
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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dnl License for more details.
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dnl You should have received a copy of the GNU Lesser General Public License
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dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
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include(`../config.m4')
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C cycles/limb
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C AMD K8,K9 1.5
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C AMD K10 1.5
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C Intel P4 ?
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C Intel core2 4.9
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C Intel corei ?
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C Intel atom 4
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C VIA nano 3.25
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C The inner loop of this code is the result of running a code generation and
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C optimization tool suite written by David Harvey and Torbjorn Granlund.
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C INPUT PARAMETERS
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define(`rp', `%rdi')
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define(`up', `%rsi')
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define(`vp', `%rdx')
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define(`n', `%rcx')
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define(`cy', `%r8') C (only for mpn_add_nc)
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ifdef(`OPERATION_add_n', `
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define(ADCSBB, adc)
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define(func, mpn_add_n)
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define(func_nc, mpn_add_nc)')
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ifdef(`OPERATION_sub_n', `
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define(ADCSBB, sbb)
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define(func, mpn_sub_n)
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define(func_nc, mpn_sub_nc)')
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MULFUNC_PROLOGUE(mpn_add_n mpn_add_nc mpn_sub_n mpn_sub_nc)
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ASM_START()
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TEXT
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ALIGN(16)
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PROLOGUE(func_nc)
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mov R32(n), R32(%rax)
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shr $2, n
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and $3, R32(%rax)
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bt $0, %r8 C cy flag <- carry parameter
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jrcxz L(lt4)
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mov (up), %r8
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mov 8(up), %r9
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dec n
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jmp L(mid)
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EPILOGUE()
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ALIGN(16)
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PROLOGUE(func)
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mov R32(n), R32(%rax)
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shr $2, n
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and $3, R32(%rax)
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jrcxz L(lt4)
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mov (up), %r8
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mov 8(up), %r9
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dec n
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jmp L(mid)
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L(lt4): dec R32(%rax)
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mov (up), %r8
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jnz L(2)
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ADCSBB (vp), %r8
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mov %r8, (rp)
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adc %eax, %eax
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ret
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L(2): dec R32(%rax)
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mov 8(up), %r9
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jnz L(3)
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ADCSBB (vp), %r8
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ADCSBB 8(vp), %r9
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mov %r8, (rp)
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mov %r9, 8(rp)
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adc %eax, %eax
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ret
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L(3): mov 16(up), %r10
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ADCSBB (vp), %r8
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ADCSBB 8(vp), %r9
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ADCSBB 16(vp), %r10
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mov %r8, (rp)
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mov %r9, 8(rp)
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mov %r10, 16(rp)
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setc R8(%rax)
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ret
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ALIGN(16)
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L(top): ADCSBB (vp), %r8
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ADCSBB 8(vp), %r9
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ADCSBB 16(vp), %r10
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ADCSBB 24(vp), %r11
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mov %r8, (rp)
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lea 32(up), up
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mov %r9, 8(rp)
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mov %r10, 16(rp)
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dec n
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mov %r11, 24(rp)
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lea 32(vp), vp
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mov (up), %r8
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mov 8(up), %r9
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lea 32(rp), rp
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L(mid): mov 16(up), %r10
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mov 24(up), %r11
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jnz L(top)
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L(end): lea 32(up), up
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ADCSBB (vp), %r8
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ADCSBB 8(vp), %r9
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ADCSBB 16(vp), %r10
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ADCSBB 24(vp), %r11
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lea 32(vp), vp
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mov %r8, (rp)
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mov %r9, 8(rp)
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mov %r10, 16(rp)
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mov %r11, 24(rp)
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lea 32(rp), rp
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inc R32(%rax)
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dec R32(%rax)
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jnz L(lt4)
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adc %eax, %eax
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ret
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EPILOGUE()
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