mpir/mpn/x86_64/core2/addsub_n.as
wbhart 0de1cfd773 Changed alignb #,nop back to align # because it appears to make no
difference. 

Got rid of relative paths for yasm_mac.inc.
2009-03-05 16:28:17 +00:00

87 lines
2.2 KiB
ActionScript

; core2 mpn_addsub_n
; Copyright 2009 Jason Moxham
; This file is part of the MPIR Library.
; The MPIR Library is free software; you can redistribute it and/or modify
; it under the terms of the GNU Lesser General Public License as published
; by the Free Software Foundation; either version 2.1 of the License, or (at
; your option) any later version.
; The MPIR Library is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
; License for more details.
; You should have received a copy of the GNU Lesser General Public License
; along with the MPIR Library; see the file COPYING.LIB. If not, write
; to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
; Boston, MA 02110-1301, USA.
%include 'yasm_mac.inc'
; INPUT PARAMETERS
; rp rdi
; xp rsi
; yp rdx
; zp rcx
; n r8
; (rdi, r8) = (rsi, r8) + (rdx, r8) - (rcx, r8)
; return carry - borrow
BITS 64
GLOBAL_FUNC mpn_addsub_n
lea rsi, [rsi+r8*8]
lea rdx, [rdx+r8*8]
lea rdi, [rdi+r8*8]
lea rcx, [rcx+r8*8]
neg r8
xor rax, rax
xor r10, r10
test r8, 3
jz next
lp1:
mov r9, [rdx+r8*8]
add rax, 1
sbb r9, [rcx+r8*8]
sbb rax, rax
add r10, 1
adc r9, [rsi+r8*8]
sbb r10, r10
mov [rdi+r8*8], r9
add r8, 1
test r8, 3
jnz lp1
next:
cmp r8, 0
jz end
push rbx
push rbp
align 16
lp:
add rax, 1
mov r9, [rdx+r8*8]
mov rbx, [rdx+r8*8+8]
mov rbp, [rdx+r8*8+16]
mov r11, [rdx+r8*8+24]
sbb r9, [rcx+r8*8]
sbb rbx, [rcx+r8*8+8]
sbb rbp, [rcx+r8*8+16]
sbb r11, [rcx+r8*8+24]
sbb rax, rax
add r10, 1
adc r9, [rsi+r8*8]
adc rbx, [rsi+r8*8+8]
adc rbp, [rsi+r8*8+16]
adc r11, [rsi+r8*8+24]
mov [rdi+r8*8], r9
mov [rdi+r8*8+8], rbx
mov [rdi+r8*8+16], rbp
mov [rdi+r8*8+24], r11
sbb r10, r10
add r8, 4
jnz lp
pop rbp
pop rbx
end:
sub rax, r10
ret