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dnl AMD64 mpn_add_n, mpn_sub_n
dnl Copyright 2017 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
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 General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb
C AMD K8,K9
C AMD K10
C AMD bd1 1.5 with fluctuations
C AMD bd2 1.5 with fluctuations
C AMD bd3
C AMD bd4 1.6
C AMD zen
C AMD bt1
C AMD bt2
C Intel P4
C Intel PNR
C Intel NHM
C Intel SBR
C Intel IBR
C Intel HWL 1.21
C Intel BWL 1.04
C Intel SKL
C Intel atom
C Intel SLM
C VIA nano
C The 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') C rcx
define(`up', `%rsi') C rdx
define(`vp', `%rdx') C r8
define(`n', `%rcx') C r9
define(`cy', `%r8') C rsp+40 (mpn_add_nc and mpn_sub_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)
ABI_SUPPORT(DOS64)
ABI_SUPPORT(STD64)
ASM_START()
TEXT
ALIGN(16)
PROLOGUE(func_nc)
FUNC_ENTRY(4)
IFDOS(` mov 56(%rsp), %r8 ')
mov R32(n), R32(%rax)
shr $3, n
and $7, R32(%rax)
lea L(tab)(%rip), %r9
neg %r8 C set carry
ifdef(`PIC',`
movslq (%r9,%rax,4), %rax
lea (%r9,%rax), %rax C lea not add to preserve carry
jmp *%rax
',`
jmp *(%r9,%rax,8)
')
EPILOGUE()
ALIGN(16)
PROLOGUE(func)
FUNC_ENTRY(4)
mov R32(n), R32(%rax)
shr $3, n
and $7, R32(%rax) C clear cy as side-effect
lea L(tab)(%rip), %r9
ifdef(`PIC',`
movslq (%r9,%rax,4), %rax
lea (%r9,%rax), %rax C lea not add to preserve carry
jmp *%rax
',`
jmp *(%r9,%rax,8)
')
L(0): mov (up), %r8
mov 8(up), %r9
ADCSBB (vp), %r8
jmp L(e0)
L(4): mov (up), %r8
mov 8(up), %r9
ADCSBB (vp), %r8
lea -32(up), up
lea -32(vp), vp
lea -32(rp), rp
inc n
jmp L(e4)
L(5): mov (up), %r11
mov 8(up), %r8
mov 16(up), %r9
ADCSBB (vp), %r11
lea -24(up), up
lea -24(vp), vp
lea -24(rp), rp
inc n
jmp L(e5)
L(6): mov (up), %r10
ADCSBB (vp), %r10
mov 8(up), %r11
lea -16(up), up
lea -16(vp), vp
lea -16(rp), rp
inc n
jmp L(e6)
L(7): mov (up), %r9
mov 8(up), %r10
ADCSBB (vp), %r9
ADCSBB 8(vp), %r10
lea -8(up), up
lea -8(vp), vp
lea -8(rp), rp
inc n
jmp L(e7)
ALIGN(16)
L(top):
L(e3): mov %r9, 40(rp)
L(e2): mov %r10, 48(rp)
L(e1): mov (up), %r8
mov 8(up), %r9
ADCSBB (vp), %r8
mov %r11, 56(rp)
lea 64(rp), rp
L(e0): mov 16(up), %r10
ADCSBB 8(vp), %r9
ADCSBB 16(vp), %r10
mov %r8, (rp)
L(e7): mov 24(up), %r11
mov %r9, 8(rp)
L(e6): mov 32(up), %r8
mov 40(up), %r9
ADCSBB 24(vp), %r11
mov %r10, 16(rp)
L(e5): ADCSBB 32(vp), %r8
mov %r11, 24(rp)
L(e4): mov 48(up), %r10
mov 56(up), %r11
mov %r8, 32(rp)
lea 64(up), up
ADCSBB 40(vp), %r9
ADCSBB 48(vp), %r10
ADCSBB 56(vp), %r11
lea 64(vp), vp
dec n
jnz L(top)
L(end): mov %r9, 40(rp)
mov %r10, 48(rp)
mov %r11, 56(rp)
mov R32(n), R32(%rax)
adc R32(n), R32(%rax)
FUNC_EXIT()
ret
ALIGN(16)
L(3): mov (up), %r9
mov 8(up), %r10
mov 16(up), %r11
ADCSBB (vp), %r9
ADCSBB 8(vp), %r10
ADCSBB 16(vp), %r11
jrcxz L(x3)
lea 24(up), up
lea 24(vp), vp
lea -40(rp), rp
jmp L(e3)
L(x3): mov %r9, (rp)
mov %r10, 8(rp)
mov %r11, 16(rp)
mov R32(n), R32(%rax)
adc R32(n), R32(%rax)
FUNC_EXIT()
ret
ALIGN(16)
L(1): mov (up), %r11
ADCSBB (vp), %r11
jrcxz L(x1)
lea 8(up), up
lea 8(vp), vp
lea -56(rp), rp
jmp L(e1)
L(x1): mov %r11, (rp)
mov R32(n), R32(%rax)
adc R32(n), R32(%rax)
FUNC_EXIT()
ret
ALIGN(16)
L(2): mov (up), %r10
mov 8(up), %r11
ADCSBB (vp), %r10
ADCSBB 8(vp), %r11
jrcxz L(x2)
lea 16(up), up
lea 16(vp), vp
lea -48(rp), rp
jmp L(e2)
L(x2): mov %r10, (rp)
mov %r11, 8(rp)
mov R32(n), R32(%rax)
adc R32(n), R32(%rax)
FUNC_EXIT()
ret
EPILOGUE()
JUMPTABSECT
ALIGN(8)
L(tab): JMPENT( L(0), L(tab))
JMPENT( L(1), L(tab))
JMPENT( L(2), L(tab))
JMPENT( L(3), L(tab))
JMPENT( L(4), L(tab))
JMPENT( L(5), L(tab))
JMPENT( L(6), L(tab))
JMPENT( L(7), L(tab))
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