174 lines
3.6 KiB
NASM
174 lines
3.6 KiB
NASM
dnl mpn_sub_err1_n
|
|
|
|
dnl Copyright 2009 Jason Moxham
|
|
|
|
dnl This file is part of the MPIR Library.
|
|
|
|
dnl The MPIR 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 2.1 of the License, or (at
|
|
dnl your option) any later version.
|
|
|
|
dnl The MPIR 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 MPIR Library; see the file COPYING.LIB. If not, write
|
|
dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
dnl Boston, MA 02110-1301, USA.
|
|
|
|
include(`../config.m4')
|
|
|
|
C ret mpn_sub_err1(mp_ptr,mp_ptr,mp_ptr,mp_ptr,mp_ptr_t,mp_size_t,mp_limb_t)
|
|
C rax rdi, rsi, rdx, rcx, r8 r9 8(rsp)
|
|
|
|
ASM_START()
|
|
PROLOGUE(mpn_sub_err1_n)
|
|
C // if we rearrange the params we could save some moves
|
|
C // (rdi,r9)=(rsi,r9)+(rdx,r9) sum=carry*(r8)
|
|
mov 8(%rsp),%r10
|
|
mov %rbp,-16(%rsp)
|
|
lea -24(%rdi,%r9,8),%rdi
|
|
mov %r12,-24(%rsp)
|
|
mov %r13,-32(%rsp)
|
|
lea -24(%rsi,%r9,8),%rsi
|
|
mov %r14,-40(%rsp)
|
|
mov %r15,-48(%rsp)
|
|
lea -24(%rdx,%r9,8),%rdx
|
|
mov %rcx,-56(%rsp)
|
|
mov %rbx,-8(%rsp)
|
|
mov $3,%r11
|
|
shl $63,%r10
|
|
lea (%r8,%r9,8),%r8
|
|
sub %r9,%r11
|
|
mov $0,%r9
|
|
mov $0,%rax
|
|
mov $0,%rbx
|
|
jnc skiplp
|
|
ALIGN(16)
|
|
lp:
|
|
mov (%rsi,%r11,8),%r12
|
|
mov 8(%rsi,%r11,8),%r13
|
|
mov 16(%rsi,%r11,8),%r14
|
|
mov 24(%rsi,%r11,8),%r15
|
|
mov $0,%rbp
|
|
shl $1,%r10
|
|
sbb (%rdx,%r11,8),%r12
|
|
cmovc -8(%r8),%rax
|
|
sbb 8(%rdx,%r11,8),%r13
|
|
cmovc -16(%r8),%rbx
|
|
mov $0,%rcx
|
|
sbb 16(%rdx,%r11,8),%r14
|
|
cmovc -24(%r8),%rcx
|
|
sbb 24(%rdx,%r11,8),%r15
|
|
cmovc -32(%r8),%rbp
|
|
rcr $1,%r10
|
|
add %rax,%r9
|
|
adc $0,%r10
|
|
add %rbx,%r9
|
|
adc $0,%r10
|
|
add %rcx,%r9
|
|
mov $0,%rax
|
|
adc $0,%r10
|
|
lea -32(%r8),%r8
|
|
add %rbp,%r9
|
|
adc $0,%r10
|
|
mov %r12,(%rdi,%r11,8)
|
|
mov %r13,8(%rdi,%r11,8)
|
|
mov %r14,16(%rdi,%r11,8)
|
|
mov %r15,24(%rdi,%r11,8)
|
|
mov $0,%rbx
|
|
add $4,%r11
|
|
jnc lp
|
|
skiplp:
|
|
cmp $2,%r11
|
|
mov -16(%rsp),%rbp
|
|
mov -48(%rsp),%r15
|
|
ja case0
|
|
je case1
|
|
jp case2
|
|
case3:
|
|
mov (%rsi,%r11,8),%r12
|
|
mov 8(%rsi,%r11,8),%r13
|
|
mov 16(%rsi,%r11,8),%r14
|
|
shl $1,%r10
|
|
sbb (%rdx,%r11,8),%r12
|
|
cmovc -8(%r8),%rax
|
|
sbb 8(%rdx,%r11,8),%r13
|
|
cmovc -16(%r8),%rbx
|
|
mov $0,%rcx
|
|
sbb 16(%rdx,%r11,8),%r14
|
|
cmovc -24(%r8),%rcx
|
|
rcr $1,%r10
|
|
add %rax,%r9
|
|
adc $0,%r10
|
|
add %rbx,%r9
|
|
adc $0,%r10
|
|
add %rcx,%r9
|
|
adc $0,%r10
|
|
mov %r12,(%rdi,%r11,8)
|
|
mov %r13,8(%rdi,%r11,8)
|
|
mov %r14,16(%rdi,%r11,8)
|
|
mov -56(%rsp),%rcx
|
|
mov %r9,(%rcx)
|
|
btr $63,%r10
|
|
mov %r10,8(%rcx)
|
|
mov -40(%rsp),%r14
|
|
mov $0,%rax
|
|
mov -32(%rsp),%r13
|
|
adc $0,%rax
|
|
mov -24(%rsp),%r12
|
|
mov -8(%rsp),%rbx
|
|
ret
|
|
ALIGN(16)
|
|
case2:
|
|
mov (%rsi,%r11,8),%r12
|
|
mov 8(%rsi,%r11,8),%r13
|
|
shl $1,%r10
|
|
sbb (%rdx,%r11,8),%r12
|
|
cmovc -8(%r8),%rax
|
|
sbb 8(%rdx,%r11,8),%r13
|
|
cmovc -16(%r8),%rbx
|
|
rcr $1,%r10
|
|
add %rax,%r9
|
|
adc $0,%r10
|
|
add %rbx,%r9
|
|
adc $0,%r10
|
|
mov %r12,(%rdi,%r11,8)
|
|
mov %r13,8(%rdi,%r11,8)
|
|
mov -56(%rsp),%rcx
|
|
mov %r9,(%rcx)
|
|
btr $63,%r10
|
|
mov %r10,8(%rcx)
|
|
mov -40(%rsp),%r14
|
|
mov $0,%rax
|
|
mov -32(%rsp),%r13
|
|
adc $0,%rax
|
|
mov -24(%rsp),%r12
|
|
mov -8(%rsp),%rbx
|
|
ret
|
|
ALIGN(16)
|
|
case1:
|
|
mov (%rsi,%r11,8),%r12
|
|
shl $1,%r10
|
|
sbb (%rdx,%r11,8),%r12
|
|
cmovc -8(%r8),%rax
|
|
rcr $1,%r10
|
|
add %rax,%r9
|
|
adc $0,%r10
|
|
mov %r12,(%rdi,%r11,8)
|
|
case0: mov -56(%rsp),%rcx
|
|
mov %r9,(%rcx)
|
|
btr $63,%r10
|
|
mov %r10,8(%rcx)
|
|
mov -40(%rsp),%r14
|
|
mov $0,%rax
|
|
mov -32(%rsp),%r13
|
|
adc $0,%rax
|
|
mov -24(%rsp),%r12
|
|
mov -8(%rsp),%rbx
|
|
ret
|
|
EPILOGUE()
|