96 lines
2.4 KiB
NASM
96 lines
2.4 KiB
NASM
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; X86_64 mpn_divrem_euclidean_1
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;
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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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; 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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; Calling interface:
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;
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; dst[] = src[] / f
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;
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; This is an SEH frame function
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;
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; This function "replaces" divrem_1 mod_1
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%include "yasm_mac.inc"
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%define reg_save_list rsi, rdi, rbp, r12, r13, r14, r15
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BITS 64
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FRAME_PROC mpn_divrem_euclidean_qr_1, 0, reg_save_list
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mov rdi, rcx
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mov rsi, rdx
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movsxd r14, r8d
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xor r15, r15
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bsr rcx, r9
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xor rcx, 63
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shl r9, cl
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xor r11, r11
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mov rdx, r9
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not rdx
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xor rax, rax
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not rax
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div r9
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mov r8, rax
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xor rax, rax
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xor rbp, rbp
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align 16
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.1: mov r13, [rsi+r14*8-8]
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mov r12, r13
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neg rcx
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cmovnc r13, r15
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shr r13, cl
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neg rcx
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shl r12, cl
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mov r10, r12
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sar r10, 63
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add rax, r13
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sub rax, r10
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add rax, r11
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add r11, r13
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add r11, rbp
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mul r8
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mov r13, r11
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and r10, r9
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add r10, r12
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add rax, r10
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mov r10, r11
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adc r10, rdx
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not r10
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mov rax, r9
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mul r10
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sub r13, r9
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add rax, r12
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mov r11, r9
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adc rdx, r13
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and r11, rdx
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mov rbp, rax
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sub rdx, r10
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mov [rdi+r14*8-8], rdx
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dec r14
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jnz .1
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add r11, rax
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shr r11, cl
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mov rax, r11
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END_PROC reg_save_list
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end |