mpir/mpn/x86_64w/amd64/sublsh1_n.asm

102 lines
2.5 KiB
NASM

; AMD64 mpn_sublsh1_n
; Verdxon 1.0.3
;
; Copyright 2008 Jason Moxham
;
; Windows Conversion Copyright 2008 Brian Gladman
;
; 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 verdxon 2.1 of the License, or (at
; your option) any later verdxon.
; 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.
;
; Calling interface:
;
; rcx[r10] = rdx[r10] - 2 * r14[r10]
;
; void __gmpn_sublsh1_n(
; mp_ptr rp, rcx
; mp_srcptr xp, rdx
; mp_srcptr yp, r8
; mp_size_t n, r9
; )
;
; This is an SEH Frame Function
%include "..\yasm_mac.inc"
%define reg_save_list rbx, rsi, rdi, r12, r13, r14, r15
BITS 64
FRAME_PROC mpn_sublsh1_n, 0, reg_save_list
movsxd rax, r9d
lea rsi, [rdx+rax*8]
lea rdx, [r8+rax*8]
lea rdi, [rcx+rax*8]
mov rcx, rax
neg rcx
xor r9, r9
xor rax, rax
test rcx, 3
jz .2
.1: mov r10, [rsi+rcx*8]
add r9, 1
sbb r10, [rdx+rcx*8]
sbb r9, r9
add rax, 1
sbb r10, [rdx+rcx*8]
sbb rax, rax
mov [rdi+rcx*8], r10
inc rcx
test rcx, 3
jnz .1
.2: cmp rcx, 0
jz .4
alignb 16, nop
.3: mov r10, [rsi+rcx*8]
mov rbx, [rsi+rcx*8+8]
mov r11, [rsi+rcx*8+16]
mov r8, [rsi+rcx*8+24]
mov r12, [rdx+rcx*8]
mov r13, [rdx+rcx*8+8]
mov r14, [rdx+rcx*8+16]
mov r15, [rdx+rcx*8+24]
add r9, 1
sbb r10, r12
sbb rbx, r13
sbb r11, r14
sbb r8, r15
sbb r9, r9
add rax, 1
sbb r10, r12
sbb rbx, r13
sbb r11, r14
sbb r8, r15
sbb rax, rax
mov [rdi+rcx*8], r10
mov [rdi+rcx*8+8], rbx
mov [rdi+rcx*8+16], r11
mov [rdi+rcx*8+24], r8
add rcx, 4
jnz .3
.4: add rax, r9
neg rax
END_PROC reg_save_list
end