112 lines
2.9 KiB
NASM
112 lines
2.9 KiB
NASM
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; mpn_lshift
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; Copyright 2009 Jason Moxham
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; This file is part of the MPIR Library.
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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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; mpn_lshift(mp_ptr rdi, mp_ptr rsi, mp_size_t rdx, mp_limb_t rcx)
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; rcx rdx r8d r9
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; rax=carry
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%include "..\yasm_mac.inc"
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%define reg_save_list rbx, rsi, rdi
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CPU Athlon64
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BITS 64
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FRAME_PROC mpn_lshift, 0, reg_save_list
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; odd and even n seem to have different runtimes
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movsxd rbx, r8d
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lea rsi, [rdx+24]
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lea rdi, [rcx+24]
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mov rcx, r9
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mov rdx, [rsi+rbx*8-32]
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xor rax, rax
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shld rax, rdx, cl
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sub rbx, 5
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js L_skiplp
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xalign 16
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L_lp:
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mov r8, [rsi+rbx*8]
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mov r11, [rsi+rbx*8-24]
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mov r9, [rsi+rbx*8-8]
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shld rdx, r8, cl
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mov [rdi+rbx*8+8], rdx
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mov rdx, r11
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mov r10, [rsi+rbx*8-16]
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shld r8, r9, cl
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shld r9, r10, cl
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mov [rdi+rbx*8], r8
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mov [rdi+rbx*8-8], r9
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shld r10, r11, cl
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sub rbx, 4
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mov [rdi+rbx*8+16], r10
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jns L_lp
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L_skiplp:
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cmp rbx, -2
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ja L_case3
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je L_case2
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jp L_case1
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; ALIGN(16)
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L_case0:
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shl rdx, cl
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mov [rdi+rbx*8+8], rdx
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jmp L_xit
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xalign 16
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L_case3:
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mov r8, [rsi+rbx*8]
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mov r9, [rsi+rbx*8-8]
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shld rdx, r8, cl
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mov [rdi+rbx*8+8], rdx
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mov r10, [rsi+rbx*8-16]
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shld r8, r9, cl
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shld r9, r10, cl
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mov [rdi+rbx*8], r8
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mov [rdi+rbx*8-8], r9
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shl r10, cl
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mov [rdi+rbx*8-16], r10
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jmp L_xit
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xalign 16
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L_case2:
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mov r8, [rsi+rbx*8]
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mov r9, [rsi+rbx*8-8]
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shld rdx, r8, cl
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mov [rdi+rbx*8+8], rdx
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shld r8, r9, cl
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shl r9, cl
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mov [rdi+rbx*8], r8
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mov [rdi+rbx*8-8], r9
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jmp L_xit
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xalign 16
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L_case1:
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mov r8, [rsi+rbx*8]
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shld rdx, r8, cl
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mov [rdi+rbx*8+8], rdx
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shl r8, cl
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mov [rdi+rbx*8], r8
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L_xit:
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END_PROC reg_save_list
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end
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