177 lines
3.6 KiB
NASM
177 lines
3.6 KiB
NASM
; PROLOGUE(mpn_popcount)
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; mpn_popcount
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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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; mpn_limb_t mpn_popcount(mp_ptr,mp_size_t)
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; rax rdi, rsi
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; rax rcx, rdx
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%include "yasm_mac.inc"
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CPU Athlon64
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BITS 64
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%define reg_save_list rsi, rdi, r12, r14, r15
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FRAME_PROC mpn_popcount, 0, reg_save_list
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mov rdi, rcx
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mov rsi, rdx
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mov r8, 0x5555555555555555
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mov r9, 0x3333333333333333
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mov r10, 0x0f0f0f0f0f0f0f0f
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mov r11, 0x0101010101010101
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xor rax, rax
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sub rsi, 3
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jc .2
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mov rcx, [rdi+rsi*8+16]
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mov r12, [rdi+rsi*8+8]
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mov r14, [rdi+rsi*8]
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sub rsi, 3
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jc .1
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xalign 16
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.0:
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mov rdx, rcx
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shr rcx, 1
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and rcx, r8
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sub rdx, rcx
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mov rcx, rdx
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shr rdx, 2
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and rcx, r9
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and rdx, r9
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add rdx, rcx
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mov rcx, r12
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shr r12, 1
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and r12, r8
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sub rcx, r12
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mov r12, rcx
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shr rcx, 2
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and r12, r9
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and rcx, r9
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add r12, rcx
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mov r15, r14
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shr r14, 1
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and r14, r8
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mov rcx, [rdi+rsi*8+16]
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sub r15, r14
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mov r14, r15
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shr r15, 2
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and r14, r9
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and r15, r9
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add r15, r14
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add r12, rdx
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add r12, r15
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mov r14, r12
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shr r12, 4
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and r14, r10
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and r12, r10
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add r14, r12
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imul r14, r11
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shr r14, 56
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add rax, r14
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mov r12, [rdi+rsi*8+8]
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sub rsi, 3
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mov r14, [rdi+rsi*8+24-0]
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jnc .0
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.1:
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mov rdx, rcx
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shr rcx, 1
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and rcx, r8
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sub rdx, rcx
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mov rcx, rdx
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shr rdx, 2
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and rcx, r9
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and rdx, r9
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add rdx, rcx
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mov rcx, r12
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shr r12, 1
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and r12, r8
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sub rcx, r12
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mov r12, rcx
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shr rcx, 2
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and r12, r9
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and rcx, r9
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add r12, rcx
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mov r15, r14
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shr r14, 1
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and r14, r8
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sub r15, r14
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mov r14, r15
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shr r15, 2
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and r14, r9
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and r15, r9
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add r15, r14
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add r12, rdx
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add r12, r15
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mov r14, r12
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shr r12, 4
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and r14, r10
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and r12, r10
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add r14, r12
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imul r14, r11
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shr r14, 56
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add rax, r14
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.2: cmp rsi, -2
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jl .5
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jz .4
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.3:
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mov rcx, [rdi+rsi*8+16]
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mov rdx, rcx
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shr rcx, 1
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and rcx, r8
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sub rdx, rcx
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mov rcx, rdx
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shr rdx, 2
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and rcx, r9
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and rdx, r9
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add rdx, rcx
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mov r14, rdx
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shr rdx, 4
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and r14, r10
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and rdx, r10
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add r14, rdx
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imul r14, r11
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shr r14, 56
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add rax, r14
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dec rsi
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.4: mov rcx, [rdi+rsi*8+16]
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mov rdx, rcx
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shr rcx, 1
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and rcx, r8
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sub rdx, rcx
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mov rcx, rdx
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shr rdx, 2
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and rcx, r9
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and rdx, r9
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add rdx, rcx
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mov r14, rdx
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shr rdx, 4
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and r14, r10
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and rdx, r10
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add r14, rdx
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imul r14, r11
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shr r14, 56
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add rax, r14
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.5: END_PROC reg_save_list
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end
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