99 lines
2.3 KiB
ActionScript
99 lines
2.3 KiB
ActionScript
|
|
; mpn_sub_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'
|
|
|
|
; ret mpn_sub_n(mp_ptr,mp_ptr,mp_ptr,mp_size_t)
|
|
; (rdi,rcx)=(rsi,rcx)-(rdx,rcx) return rax=borrow
|
|
|
|
GLOBAL_FUNC mpn_sub_n
|
|
mov rax, rcx
|
|
and rax, 3
|
|
sub rcx, rax
|
|
lea rdi, [rdi+rcx*8]
|
|
lea rsi, [rsi+rcx*8]
|
|
lea rdx, [rdx+rcx*8]
|
|
neg rcx
|
|
cmp rcx, 0
|
|
jz L_skiplp
|
|
align 16
|
|
L_lp:
|
|
mov r8, [rsi+rcx*8]
|
|
mov r10, [rsi+rcx*8+16]
|
|
sbb r8, [rdx+rcx*8]
|
|
mov [rdi+rcx*8], r8
|
|
mov r9, [rsi+rcx*8+8]
|
|
sbb r9, [rdx+rcx*8+8]
|
|
mov [rdi+rcx*8+8], r9
|
|
lea rcx, [rcx+4]
|
|
mov r11, [rsi+rcx*8-8]
|
|
sbb r10, [rdx+rcx*8-16]
|
|
sbb r11, [rdx+rcx*8-8]
|
|
mov [rdi+rcx*8-16], r10
|
|
mov [rdi+rcx*8-8], r11
|
|
jrcxz L_exitlp
|
|
jmp L_lp
|
|
L_exitlp:
|
|
sbb rcx, rcx
|
|
L_skiplp:
|
|
cmp rax, 2
|
|
ja L_case3
|
|
jz L_case2
|
|
jp L_case1
|
|
L_case0:
|
|
sub rax, rcx
|
|
ret
|
|
align 16
|
|
L_case1:
|
|
add rcx, rcx
|
|
mov r8, [rsi]
|
|
sbb r8, [rdx]
|
|
mov [rdi], r8
|
|
sbb rax, rax
|
|
neg rax
|
|
ret
|
|
align 16
|
|
L_case3:
|
|
add rcx, rcx
|
|
mov r8, [rsi]
|
|
mov r10, [rsi+16]
|
|
sbb r8, [rdx]
|
|
mov [rdi], r8
|
|
mov r9, [rsi+8]
|
|
sbb r9, [rdx+8]
|
|
mov [rdi+8], r9
|
|
sbb r10, [rdx+16]
|
|
mov [rdi+16], r10
|
|
sbb rax, rax
|
|
neg rax
|
|
ret
|
|
align 16
|
|
L_case2:
|
|
add rcx, rcx
|
|
mov r8, [rsi]
|
|
sbb r8, [rdx]
|
|
mov [rdi], r8
|
|
mov r9, [rsi+8]
|
|
sbb r9, [rdx+8]
|
|
mov [rdi+8], r9
|
|
sbb rax, rax
|
|
neg rax
|
|
ret
|
|
end
|