99 lines
2.3 KiB
ActionScript
99 lines
2.3 KiB
ActionScript
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; mpn_add_n
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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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%include 'yasm_mac.inc'
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; rax=mpn_add_n(mp_ptr rdi ,mp_ptr rsi ,mp_ptr rdx ,mp_size_t rcx)
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; (rdi,rcx)=(rsi,rcx)+(rdx,rcx) return rax=carry
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GLOBAL_FUNC mpn_add_n
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mov rax, rcx
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and rax, 3
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sub rcx, rax
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lea rdi, [rdi+rcx*8]
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lea rsi, [rsi+rcx*8]
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lea rdx, [rdx+rcx*8]
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neg rcx
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cmp rcx, 0
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jz L_skiplp
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align 16
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L_lp:
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mov r8, [rsi+rcx*8]
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mov r10, [rsi+rcx*8+16]
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adc r8, [rdx+rcx*8]
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mov [rdi+rcx*8], r8
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mov r9, [rsi+rcx*8+8]
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adc r9, [rdx+rcx*8+8]
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mov [rdi+rcx*8+8], r9
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lea rcx, [rcx+4]
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mov r11, [rsi+rcx*8-8]
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adc r10, [rdx+rcx*8-16]
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adc r11, [rdx+rcx*8-8]
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mov [rdi+rcx*8-16], r10
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mov [rdi+rcx*8-8], r11
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jrcxz L_exitlp
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jmp L_lp
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L_exitlp:
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sbb rcx, rcx
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L_skiplp:
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cmp rax, 2
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ja L_case3
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jz L_case2
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jp L_case1
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L_case0:
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sub rax, rcx
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ret
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align 16
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L_case1:
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add rcx, rcx
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mov r8, [rsi]
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adc r8, [rdx]
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mov [rdi], r8
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sbb rax, rax
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neg rax
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ret
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align 16
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L_case3:
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add rcx, rcx
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mov r8, [rsi]
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mov r10, [rsi+16]
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adc r8, [rdx]
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mov [rdi], r8
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mov r9, [rsi+8]
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adc r9, [rdx+8]
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mov [rdi+8], r9
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adc r10, [rdx+16]
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mov [rdi+16], r10
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sbb rax, rax
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neg rax
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ret
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align 16
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L_case2:
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add rcx, rcx
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mov r8, [rsi]
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adc r8, [rdx]
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mov [rdi], r8
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mov r9, [rsi+8]
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adc r9, [rdx+8]
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mov [rdi+8], r9
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sbb rax, rax
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neg rax
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ret
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end
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