mul_2.asm
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上传日期:2022-08-06
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文件大小:3k
- dnl AMD64 mpn_mul_2 -- Multiply an n-limb vector with a 2-limb vector and
- dnl store the result in a third limb vector.
- dnl Copyright 2008 Free Software Foundation, Inc.
- dnl This file is part of the GNU MP Library.
- dnl The GNU MP Library is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU Lesser General Public License as published
- dnl by the Free Software Foundation; either version 3 of the License, or (at
- dnl your option) any later version.
- dnl The GNU MP Library is distributed in the hope that it will be useful, but
- dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- dnl License for more details.
- dnl You should have received a copy of the GNU Lesser General Public License
- dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
- include(`../config.m4')
- C cycles/limb
- C K8,K9: 2.275
- C K10: 2.275
- C P4: ?
- C P6 core2: 4.0
- C P6 corei7: 3.8
- C This code is the result of running a code generation and optimization tool
- C suite written by David Harvey and Torbjorn Granlund.
- C TODO
- C * Work on feed-in and wind-down code.
- C * Convert "mov $0" to "xor".
- C * Adjust initial lea to save some bytes.
- C * Perhaps adjust n from n_param&3 value?
- C * Replace with 2.25 c/l sequence.
- C INPUT PARAMETERS
- define(`rp', `%rdi')
- define(`up', `%rsi')
- define(`n_param',`%rdx')
- define(`vp', `%rcx')
- define(`v0', `%r8')
- define(`v1', `%r9')
- define(`w0', `%rbx')
- define(`w1', `%rcx')
- define(`w2', `%rbp')
- define(`w3', `%r10')
- define(`n', `%r11')
- ASM_START()
- TEXT
- ALIGN(16)
- PROLOGUE(mpn_mul_2)
- push %rbx
- push %rbp
- mov (vp), v0
- mov 8(vp), v1
- mov (up), %rax
- mov n_param, n
- neg n
- lea -8(up,n_param,8), up
- lea -8(rp,n_param,8), rp
- and $3, R32(n_param)
- jz L(m2p0)
- cmp $2, R32(n_param)
- jc L(m2p1)
- jz L(m2p2)
- L(m2p3):
- mul v0
- xor R32(w3), R32(w3)
- mov %rax, w1
- mov %rdx, w2
- mov 8(up,n,8), %rax
- add $-1, n
- mul v1
- add %rax, w2
- jmp L(m23)
- L(m2p0):
- mul v0
- xor R32(w2), R32(w2)
- mov %rax, w0
- mov %rdx, w1
- jmp L(m20)
- L(m2p1):
- mul v0
- xor R32(w3), R32(w3)
- xor R32(w0), R32(w0)
- xor R32(w1), R32(w1)
- add $1, n
- jmp L(m2top)
- L(m2p2):
- mul v0
- xor R32(w0), R32(w0)
- xor R32(w1), R32(w1)
- mov %rax, w2
- mov %rdx, w3
- mov 8(up,n,8), %rax
- add $-2, n
- jmp L(m22)
- ALIGN(32)
- L(m2top):
- add %rax, w3
- adc %rdx, w0
- mov 0(up,n,8), %rax
- adc $0, R32(w1)
- mov $0, R32(w2)
- mul v1
- add %rax, w0
- mov w3, 0(rp,n,8)
- adc %rdx, w1
- mov 8(up,n,8), %rax
- mul v0
- add %rax, w0
- adc %rdx, w1
- adc $0, R32(w2)
- L(m20): mov 8(up,n,8), %rax
- mul v1
- add %rax, w1
- adc %rdx, w2
- mov 16(up,n,8), %rax
- mov $0, R32(w3)
- mul v0
- add %rax, w1
- mov 16(up,n,8), %rax
- adc %rdx, w2
- adc $0, R32(w3)
- mul v1
- add %rax, w2
- mov w0, 8(rp,n,8)
- L(m23): adc %rdx, w3
- mov 24(up,n,8), %rax
- mul v0
- mov $0, R32(w0)
- add %rax, w2
- adc %rdx, w3
- mov w1, 16(rp,n,8)
- mov 24(up,n,8), %rax
- mov $0, R32(w1)
- adc $0, R32(w0)
- L(m22): mul v1
- add %rax, w3
- mov w2, 24(rp,n,8)
- adc %rdx, w0
- mov 32(up,n,8), %rax
- mul v0
- add $4, n
- js L(m2top)
- add %rax, w3
- adc %rdx, w0
- adc $0, R32(w1)
- mov (up), %rax
- mul v1
- mov w3, (rp)
- add %rax, w0
- adc %rdx, w1
- mov w0, 8(rp)
- mov w1, %rax
- pop %rbp
- pop %rbx
- ret
- EPILOGUE()