94 lines
2.2 KiB
ActionScript
94 lines
2.2 KiB
ActionScript
|
|
; AMD64 mpn_subadd_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.
|
|
|
|
; INPUT PARAMETERS
|
|
; rp rdi
|
|
; xp rsi
|
|
; yp rdx
|
|
; zp rcx
|
|
; n r8
|
|
|
|
; (rdi, r8) = (rsi, r8) - ( (rdx, r8) + (rcx, r8) )
|
|
; return carry+borrow
|
|
|
|
; or you can think of it as
|
|
|
|
; (rdi, r8) = (rsi, r8) - (rdx, r8) - (rcx, r8)
|
|
; return borrow+borrow
|
|
|
|
%include 'yasm_mac.inc'
|
|
|
|
BITS 64
|
|
|
|
GLOBAL_FUNC mpn_subadd_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, [rsi+r8*8]
|
|
add rax, 1
|
|
sbb r9, [rcx+r8*8]
|
|
sbb rax, rax
|
|
add r10, 1
|
|
sbb r9, [rdx+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, [rsi+r8*8]
|
|
mov rbx, [rsi+r8*8+8]
|
|
mov rbp, [rsi+r8*8+16]
|
|
mov r11, [rsi+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
|
|
sbb r9, [rdx+r8*8]
|
|
sbb rbx, [rdx+r8*8+8]
|
|
sbb rbp, [rdx+r8*8+16]
|
|
sbb r11, [rdx+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:
|
|
add rax, r10
|
|
neg rax
|
|
ret
|