155 lines
3.4 KiB
NASM
155 lines
3.4 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_divrem_euclidean_qr_2(mp_ptr, mp_ptr, mp_size_t, mp_limb_t)
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; rax rdi rsi rdx rcx
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; rax rcx rdx r8d r9
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%include "yasm_mac.inc"
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%define reg_save_list rbx, rsi, rdi, rbp, r12, r13, r14, r15
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BITS 64
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FRAME_PROC mpn_divrem_euclidean_qr_2, 0, reg_save_list
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mov rdi, rcx
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mov rsi, rdx
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movsxd rdx, r8d
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mov rcx, r9
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mov rbx, rdx
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dec rbx
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mov r9, 0
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mov rdx, [rcx+8]
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not rdx
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mov rax, -1
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div qword[rcx+8]
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mov rbp, rax
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mov r8, [rsi+rbx*8]
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dec rbx
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mov r10, [rsi+rbx*8]
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cmp r8, [rcx+8]
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jae .1
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mov rdx, r8
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mov r9, r8
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mov r10, [rsi+rbx*8]
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mov r8, r10
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mov r14, 0
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jmp .3
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.1:
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mov r14, 1
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mov rdx, r8
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sub rdx, [rcx+8]
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sub r10, [rcx]
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sbb rdx, 0
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jnc .2
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dec r14
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add r10, [rcx]
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adc rdx, [rcx+8]
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.2:
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mov r9, rdx
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mov r8, r10
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.3:
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dec rbx
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mov rax, r9
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js .8
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xalign 16
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.4:
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cmp rax, [rcx+8]
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jne .6
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mov r10, [rsi+rbx*8]
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mov r15, -1
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mov rdx, r8
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add r10, [rcx]
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adc rdx, rax
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sbb rax, rax
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sub rdx, [rcx]
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adc rax, 0
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jz .5
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dec r15
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add r10, [rcx]
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adc rdx, [rcx+8]
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.5:
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mov rax, rdx
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mov r8, r10
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jmp .7
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.6:
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mov r9, rax
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bt r8, 63
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adc rax, 0
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mov r15, r8
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mov r13, 0
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sar r15, 63
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and r15, [rcx+8]
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add r15, r8
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mul rbp
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add rax, r15
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mov rax, [rcx]
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adc rdx, r9
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mov r10, rdx
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mul rdx
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mov r12, [rcx]
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add r12, rax
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adc r13, rdx
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mov rax, [rcx+8]
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not r10
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mul r10
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sub r9, [rcx+8]
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add rax, r8
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adc rdx, r9
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mov r9, rdx
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and r9, [rcx+8]
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; swapped r9,rax from here
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add rax, r9
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mov r15, rdx
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sub r15, r10
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and rdx, [rcx]
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sub r12, rdx
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sbb r13, 0
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mov r8, [rsi+rbx*8]
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sub r8, r12
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sbb rax, r13
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mov r10, [rcx]
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mov r11, [rcx+8]
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sbb r9, r9
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and r10, r9
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and r11, r9
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add r15, r9
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add r8, r10
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adc rax, r11
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adc r9, 0
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and r10, r9
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and r11, r9
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add r15, r9
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add r8, r10
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adc rax, r11
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.7:
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mov [rdi+rbx*8], r15
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dec rbx
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jns .4
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.8:
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mov [rsi+8], rax
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mov [rsi], r8
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mov rax, r14
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END_PROC reg_save_list
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end
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