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f133d007f9
Old version was from 2012-05-06, 6.1.2 is from 2016-12-16 A lot of support for newer processors and speedups since then See gmp/NEWS for details
193 lines
3.6 KiB
NASM
193 lines
3.6 KiB
NASM
dnl AMD64 mpn_mul_2 -- Multiply an n-limb vector with a 2-limb vector and
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dnl store the result in a third limb vector.
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dnl Copyright 2008, 2011, 2012 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of either:
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dnl
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dnl * the GNU Lesser General Public License as published by the Free
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dnl Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl or
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dnl
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dnl * the GNU General Public License as published by the Free Software
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dnl Foundation; either version 2 of the License, or (at your option) any
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dnl later version.
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dnl
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dnl or both in parallel, as here.
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dnl
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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dnl for more details.
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dnl
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dnl You should have received copies of the GNU General Public License and the
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dnl GNU Lesser General Public License along with the GNU MP Library. If not,
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dnl see https://www.gnu.org/licenses/.
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include(`../config.m4')
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C cycles/limb
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C AMD K8,K9 2.275
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C AMD K10 2.275
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C Intel P4 13.5
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C Intel core2 4.0
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C Intel corei 3.8
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C Intel atom ?
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C VIA nano ?
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C This code is the result of running a code generation and optimization tool
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C suite written by David Harvey and Torbjorn Granlund.
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C TODO
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C * Work on feed-in and wind-down code.
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C * Convert "mov $0" to "xor".
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C * Adjust initial lea to save some bytes.
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C * Perhaps adjust n from n_param&3 value?
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C * Replace with 2.25 c/l sequence.
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C INPUT PARAMETERS
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define(`rp', `%rdi')
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define(`up', `%rsi')
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define(`n_param',`%rdx')
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define(`vp', `%rcx')
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define(`v0', `%r8')
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define(`v1', `%r9')
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define(`w0', `%rbx')
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define(`w1', `%rcx')
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define(`w2', `%rbp')
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define(`w3', `%r10')
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define(`n', `%r11')
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ABI_SUPPORT(DOS64)
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ABI_SUPPORT(STD64)
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ASM_START()
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TEXT
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ALIGN(16)
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PROLOGUE(mpn_mul_2)
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FUNC_ENTRY(4)
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push %rbx
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push %rbp
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mov (vp), v0
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mov 8(vp), v1
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mov (up), %rax
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mov n_param, n
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neg n
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lea -8(up,n_param,8), up
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lea -8(rp,n_param,8), rp
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and $3, R32(n_param)
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jz L(m2p0)
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cmp $2, R32(n_param)
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jc L(m2p1)
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jz L(m2p2)
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L(m2p3):
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mul v0
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xor R32(w3), R32(w3)
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mov %rax, w1
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mov %rdx, w2
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mov 8(up,n,8), %rax
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add $-1, n
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mul v1
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add %rax, w2
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jmp L(m23)
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L(m2p0):
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mul v0
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xor R32(w2), R32(w2)
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mov %rax, w0
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mov %rdx, w1
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jmp L(m20)
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L(m2p1):
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mul v0
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xor R32(w3), R32(w3)
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xor R32(w0), R32(w0)
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xor R32(w1), R32(w1)
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add $1, n
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jmp L(m2top)
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L(m2p2):
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mul v0
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xor R32(w0), R32(w0)
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xor R32(w1), R32(w1)
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mov %rax, w2
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mov %rdx, w3
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mov 8(up,n,8), %rax
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add $-2, n
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jmp L(m22)
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ALIGN(32)
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L(m2top):
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add %rax, w3
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adc %rdx, w0
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mov 0(up,n,8), %rax
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adc $0, R32(w1)
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mov $0, R32(w2)
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mul v1
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add %rax, w0
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mov w3, 0(rp,n,8)
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adc %rdx, w1
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mov 8(up,n,8), %rax
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mul v0
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add %rax, w0
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adc %rdx, w1
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adc $0, R32(w2)
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L(m20): mov 8(up,n,8), %rax
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mul v1
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add %rax, w1
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adc %rdx, w2
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mov 16(up,n,8), %rax
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mov $0, R32(w3)
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mul v0
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add %rax, w1
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mov 16(up,n,8), %rax
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adc %rdx, w2
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adc $0, R32(w3)
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mul v1
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add %rax, w2
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mov w0, 8(rp,n,8)
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L(m23): adc %rdx, w3
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mov 24(up,n,8), %rax
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mul v0
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mov $0, R32(w0)
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add %rax, w2
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adc %rdx, w3
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mov w1, 16(rp,n,8)
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mov 24(up,n,8), %rax
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mov $0, R32(w1)
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adc $0, R32(w0)
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L(m22): mul v1
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add %rax, w3
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mov w2, 24(rp,n,8)
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adc %rdx, w0
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mov 32(up,n,8), %rax
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mul v0
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add $4, n
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js L(m2top)
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add %rax, w3
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adc %rdx, w0
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adc $0, R32(w1)
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mov (up), %rax
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mul v1
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mov w3, (rp)
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add %rax, w0
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adc %rdx, w1
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mov w0, 8(rp)
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mov w1, %rax
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pop %rbp
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pop %rbx
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FUNC_EXIT()
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ret
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EPILOGUE()
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