mpir/mpn/x86_64/atom/sublsh1_n.as

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; mpn_sublsh1_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_sublsh1_n(mp_ptr,mp_ptr,mp_ptr,mp_size_t)
GLOBAL_FUNC mpn_sublsh1_n
push rbx
lea rdi, [rdi+rcx*8-56]
lea rsi, [rsi+rcx*8-56]
lea rdx, [rdx+rcx*8-56]
xor rax, rax
xor r10, r10
mov r8, 3
sub r8, rcx
jge L_skip
add r8, 4
mov r11, [rsi+r8*8+24]
mov rcx, [rsi+r8*8+16]
mov r9, [rsi+r8*8]
mov rbx, [rsi+r8*8+8]
jc L_skiplp
align 16
L_lp:
add rax, 1
sbb r9, [rdx+r8*8]
sbb rbx, [rdx+r8*8+8]
sbb rcx, [rdx+r8*8+16]
sbb r11, [rdx+r8*8+24]
sbb rax, rax
add r10, 1
sbb r9, [rdx+r8*8]
sbb rbx, [rdx+r8*8+8]
sbb rcx, [rdx+r8*8+16]
sbb r11, [rdx+r8*8+24]
sbb r10, r10
mov [rdi+r8*8], r9
mov [rdi+r8*8+8], rbx
mov [rdi+r8*8+16], rcx
mov [rdi+r8*8+24], r11
mov r11, [rsi+r8*8+56]
mov rcx, [rsi+r8*8+48]
add r8, 4
mov r9, [rsi+r8*8]
mov rbx, [rsi+r8*8+8]
jnc L_lp
L_skiplp:
add rax, 1
sbb r9, [rdx+r8*8]
sbb rbx, [rdx+r8*8+8]
sbb rcx, [rdx+r8*8+16]
sbb r11, [rdx+r8*8+24]
sbb rax, rax
add r10, 1
sbb r9, [rdx+r8*8]
sbb rbx, [rdx+r8*8+8]
sbb rcx, [rdx+r8*8+16]
sbb r11, [rdx+r8*8+24]
sbb r10, r10
mov [rdi+r8*8], r9
mov [rdi+r8*8+8], rbx
mov [rdi+r8*8+16], rcx
mov [rdi+r8*8+24], r11
L_skip:
cmp r8, 2
ja L_case0
jz L_case1
jp L_case2
L_case3:
mov rcx, [rsi+r8*8+48]
mov r9, [rsi+r8*8+32]
mov rbx, [rsi+r8*8+40]
add rax, 1
sbb r9, [rdx+r8*8+32]
sbb rbx, [rdx+r8*8+40]
sbb rcx, [rdx+r8*8+48]
sbb rax, rax
add r10, 1
sbb r9, [rdx+r8*8+32]
sbb rbx, [rdx+r8*8+40]
sbb rcx, [rdx+r8*8+48]
mov [rdi+r8*8+32], r9
mov [rdi+r8*8+40], rbx
mov [rdi+r8*8+48], rcx
sbb rax, 0
neg rax
pop rbx
ret
align 16
L_case2:
mov r9, [rsi+r8*8+32]
mov rbx, [rsi+r8*8+40]
add rax, 1
sbb r9, [rdx+r8*8+32]
sbb rbx, [rdx+r8*8+40]
sbb rax, rax
add r10, 1
sbb r9, [rdx+r8*8+32]
sbb rbx, [rdx+r8*8+40]
mov [rdi+r8*8+32], r9
mov [rdi+r8*8+40], rbx
sbb rax, 0
neg rax
pop rbx
ret
align 16
L_case1:
mov r9, [rsi+r8*8+32]
add rax, 1
sbb r9, [rdx+r8*8+32]
sbb rax, rax
add r10, 1
sbb r9, [rdx+r8*8+32]
mov [rdi+r8*8+32], r9
sbb rax, 0
neg rax
pop rbx
ret
align 16
L_case0:
add r10, 1
sbb rax, 0
neg rax
pop rbx
ret
end