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dnl AMD64 mpn_addlshC_n -- rp[] = up[] + (vp[] << C)
dnl AMD64 mpn_rsblshC_n -- rp[] = (vp[] << C) - up[]
dnl Copyright 2009, 2010, 2011 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/.
C cycles/limb
C AMD K8,K9 2
C AMD K10 2
C Intel P4 ?
C Intel core2 3
C Intel NHM 2.75
C Intel SBR 2.55
C Intel atom ?
C VIA nano ?
C INPUT PARAMETERS
define(`rp', `%rdi')
define(`up', `%rsi')
define(`vp', `%rdx')
define(`n', `%rcx')
define(M, eval(m4_lshift(1,LSH)))
ABI_SUPPORT(DOS64)
ABI_SUPPORT(ELF64)
ASM_START()
TEXT
ALIGN(16)
PROLOGUE(func)
DOS64_ENTRY(4)
push %r12
push %r13
push %r14
push %r15
mov (vp), %r8
lea (,%r8,M), %r12
shr $RSH, %r8
mov R32(n), R32(%rax)
lea (rp,n,8), rp
lea (up,n,8), up
lea (vp,n,8), vp
neg n
and $3, R8(%rax)
je L(b00)
cmp $2, R8(%rax)
jc L(b01)
je L(b10)
L(b11): mov 8(vp,n,8), %r10
lea (%r8,%r10,M), %r14
shr $RSH, %r10
mov 16(vp,n,8), %r11
lea (%r10,%r11,M), %r15
shr $RSH, %r11
ADDSUB (up,n,8), %r12
ADCSBB 8(up,n,8), %r14
ADCSBB 16(up,n,8), %r15
sbb R32(%rax), R32(%rax) C save carry for next
mov %r12, (rp,n,8)
mov %r14, 8(rp,n,8)
mov %r15, 16(rp,n,8)
add $3, n
js L(top)
jmp L(end)
L(b01): mov %r8, %r11
ADDSUB (up,n,8), %r12
sbb R32(%rax), R32(%rax) C save carry for next
mov %r12, (rp,n,8)
add $1, n
js L(top)
jmp L(end)
L(b10): mov 8(vp,n,8), %r11
lea (%r8,%r11,M), %r15
shr $RSH, %r11
ADDSUB (up,n,8), %r12
ADCSBB 8(up,n,8), %r15
sbb R32(%rax), R32(%rax) C save carry for next
mov %r12, (rp,n,8)
mov %r15, 8(rp,n,8)
add $2, n
js L(top)
jmp L(end)
L(b00): mov 8(vp,n,8), %r9
mov 16(vp,n,8), %r10
jmp L(e00)
ALIGN(16)
L(top): mov 16(vp,n,8), %r10
mov (vp,n,8), %r8
mov 8(vp,n,8), %r9
lea (%r11,%r8,M), %r12
shr $RSH, %r8
L(e00): lea (%r8,%r9,M), %r13
shr $RSH, %r9
mov 24(vp,n,8), %r11
lea (%r9,%r10,M), %r14
shr $RSH, %r10
lea (%r10,%r11,M), %r15
shr $RSH, %r11
add R32(%rax), R32(%rax) C restore carry
ADCSBB (up,n,8), %r12
ADCSBB 8(up,n,8), %r13
ADCSBB 16(up,n,8), %r14
ADCSBB 24(up,n,8), %r15
mov %r12, (rp,n,8)
mov %r13, 8(rp,n,8)
mov %r14, 16(rp,n,8)
sbb R32(%rax), R32(%rax) C save carry for next
mov %r15, 24(rp,n,8)
add $4, n
js L(top)
L(end):
ifelse(ADDSUB,add,`
sub R32(%r11), R32(%rax)
neg R32(%rax)
',`
add R32(%r11), R32(%rax)
movslq R32(%rax), %rax
')
pop %r15
pop %r14
pop %r13
pop %r12
DOS64_EXIT()
ret
EPILOGUE()
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