100 lines
2.6 KiB
NASM
100 lines
2.6 KiB
NASM
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; AMD64 mpn_subadd_n
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; Version 1.0.4
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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 (GCC):
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;
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; rcx[rbx] = rdx[rbx] - r8[rbx] + r9[rbx]
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;
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; return carry
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;
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; mp_limb_t __gmpn_subadd_n(
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; mp_ptr dp, rcx
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; mp_srcptr sp1, rdx
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; mp_srcptr sp2, r8
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; mp_srcptr sp3, r9
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; mp_size_t len [rsp+0x28] -> rbx
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; )
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;
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; This is an SEH frame function
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%include "..\yasm_mac.inc"
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%define reg_save_list rbx, rbp, rsi, rdi
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CPU Athlon64
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BITS 64
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FRAME_PROC mpn_subadd_n, 0, reg_save_list
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movsxd rbx, dword [rsp+stack_use+40]
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lea rdx, [rdx+rbx*8]
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lea r8, [r8+rbx*8]
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lea rcx, [rcx+rbx*8]
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lea r9, [r9+rbx*8]
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neg rbx
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xor rax, rax
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xor r11, r11
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test rbx, 3
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jz .2
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.1: mov rsi, [rdx+rbx*8]
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add rax, 1
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sbb rsi, [r9+rbx*8]
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sbb rax, rax
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add r11, 1
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sbb rsi, [r8+rbx*8]
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sbb r11, r11
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mov [rcx+rbx*8], rsi
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add rbx, 1
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test rbx, 3
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jnz .1
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.2: cmp rbx, 0
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jz .4
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xalign 16
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.3: add rax, 1
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mov rsi, [rdx+rbx*8]
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mov rdi, [rdx+rbx*8+8]
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mov rbp, [rdx+rbx*8+16]
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mov r10, [rdx+rbx*8+24]
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sbb rsi, [r9+rbx*8]
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sbb rdi, [r9+rbx*8+8]
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sbb rbp, [r9+rbx*8+16]
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sbb r10, [r9+rbx*8+24]
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sbb rax, rax
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add r11, 1
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sbb rsi, [r8+rbx*8]
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sbb rdi, [r8+rbx*8+8]
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sbb rbp, [r8+rbx*8+16]
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sbb r10, [r8+rbx*8+24]
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mov [rcx+rbx*8], rsi
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mov [rcx+rbx*8+8], rdi
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mov [rcx+rbx*8+16], rbp
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mov [rcx+rbx*8+24], r10
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sbb r11, r11
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add rbx, 4
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jnz .3
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.4: add rax, r11
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neg rax
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END_PROC reg_save_list
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end
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