110 lines
2.6 KiB
NASM
110 lines
2.6 KiB
NASM
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; Copyright 2008 Jason Moxham
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;
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; Windows Conversion Copyright 2008 Brian Gladman
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;
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; This file is part of the MPIR Library.
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;
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; The MPIR Library is free software; you can redistribute it and/or modify
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; it under the terms of the GNU Lesser General Public License as published
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; by the Free Software Foundation; either version 2.1 of the License, or (at
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; your option) any later version.
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; The MPIR Library is distributed in the hope that it will be useful, but
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; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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; License for more details.
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; You should have received a copy of the GNU Lesser General Public License
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; along with the MPIR Library; see the file COPYING.LIB. If not, write
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; to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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; Boston, MA 02110-1301, USA.
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;
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; mp_limb_t mpn_lshift1(mp_ptr, mp_ptr, mp_size_t)
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; rax rdi rsi rdx
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; rax rcx rdx r8
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%include "yasm_mac.inc"
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CPU Athlon64
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BITS 64
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LEAF_PROC mpn_lshift1
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mov rax, r8
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and r8, 7
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inc r8
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mov [rsp+0x18], r8
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shr rax, 3
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cmp rax, 0
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jz .2
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xalign 16
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.1: mov r8, [rdx]
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mov r9, [rdx+8]
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mov r10, [rdx+16]
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mov r11, [rdx+24]
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adc r8, r8
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adc r9, r9
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adc r10, r10
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adc r11, r11
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mov [rcx], r8
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mov [rcx+8], r9
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mov [rcx+16], r10
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mov [rcx+24], r11
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mov r8, [rdx+32]
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mov r9, [rdx+40]
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mov r10, [rdx+48]
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mov r11, [rdx+56]
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adc r8, r8
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adc r9, r9
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adc r10, r10
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adc r11, r11
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mov [rcx+32], r8
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mov [rcx+40], r9
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mov [rcx+48], r10
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mov [rcx+56], r11
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lea rcx, [rcx+64]
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dec rax
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lea rdx, [rdx+64]
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jnz .1
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.2: mov rax, [rsp+0x18]
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dec rax
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jz .3
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; Could still have cache-bank conflicts in this tail part
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mov r8, [rdx]
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adc r8, r8
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mov [rcx], r8
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dec rax
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jz .3
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mov r8, [rdx+8]
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adc r8, r8
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mov [rcx+8], r8
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dec rax
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jz .3
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mov r8, [rdx+16]
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adc r8, r8
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mov [rcx+16], r8
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dec rax
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jz .3
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mov r8, [rdx+24]
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adc r8, r8
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mov [rcx+24], r8
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dec rax
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jz .3
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mov r8, [rdx+32]
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adc r8, r8
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mov [rcx+32], r8
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dec rax
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jz .3
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mov r8, [rdx+40]
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adc r8, r8
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mov [rcx+40], r8
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dec rax
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jz .3
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mov r8, [rdx+48]
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adc r8, r8
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mov [rcx+48], r8
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.3: sbb rax, rax
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neg rax
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ret
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end
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