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4c74403188
Change-Id: Iae65e95cfa0d92091b8b0a424ae36d88efa76aa9 Reviewed-on: https://review.haiku-os.org/c/buildtools/+/3020 Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
191 lines
3.5 KiB
NASM
191 lines
3.5 KiB
NASM
dnl AMD64 mpn_mul_2 optimised for Intel Atom.
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dnl Copyright 2008, 2011-2013 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 best
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C AMD K8,K9 5.78
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C AMD K10 5.78
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C AMD bull 9.10
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C AMD pile 9.17
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C AMD steam
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C AMD excavator
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C AMD bobcat 11.3
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C AMD jaguar 10.9
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C Intel P4 24.6
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C Intel core2 8.06
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C Intel NHM 7.65
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C Intel SBR 6.28
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C Intel IBR 6.10
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C Intel HWL 6.09
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C Intel BWL 4.73
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C Intel SKL 4.77
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C Intel atom 35.3
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C Intel SLM 25.6
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C VIA nano
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C The loop of this code is the result of running a code generation and
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C optimisation tool suite written by David Harvey and Torbjorn Granlund.
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define(`rp', `%rdi') C rcx
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define(`up', `%rsi') C rdx
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define(`n_param', `%rdx') C r8
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define(`vp', `%rcx') C r9
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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 (up), %rax
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mov (vp), v0
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mov 8(vp), v1
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mov n_param, n
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mul v0
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test $1, R8(n)
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jnz L(bx1)
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L(bx0): test $2, R8(n)
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jnz L(b10)
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L(b00): mov %rax, w0
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mov (up), %rax
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mov %rdx, w1
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xor R32(w2), R32(w2)
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lea -8(rp), rp
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jmp L(lo0)
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L(b10): mov %rax, w2
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mov (up), %rax
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mov %rdx, w3
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xor R32(w0), R32(w0)
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lea -16(up), up
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lea -24(rp), rp
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jmp L(lo2)
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L(bx1): test $2, R8(n)
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jnz L(b11)
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L(b01): mov %rax, w3
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mov %rdx, w0
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mov (up), %rax
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xor R32(w1), R32(w1)
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lea 8(up), up
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dec n
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jmp L(lo1)
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L(b11): mov %rax, w1
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mov (up), %rax
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mov %rdx, w2
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xor R32(w3), R32(w3)
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lea -8(up), up
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lea -16(rp), rp
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jmp L(lo3)
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ALIGN(16)
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L(top):
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L(lo1): mul v1
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add %rax, w0
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mov (up), %rax
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mov $0, R32(w2)
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mov w3, (rp)
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adc %rdx, w1
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mul v0
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add %rax, w0
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mov (up), %rax
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adc %rdx, w1
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adc $0, R32(w2)
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L(lo0): mul v1
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add %rax, w1
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mov 8(up), %rax
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mov w0, 8(rp)
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adc %rdx, w2
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mul v0
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add %rax, w1
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mov 8(up), %rax
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adc %rdx, w2
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mov $0, R32(w3)
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adc $0, R32(w3)
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L(lo3): mul v1
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add %rax, w2
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mov 16(up), %rax
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mov w1, 16(rp)
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mov $0, R32(w0)
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adc %rdx, w3
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mul v0
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add %rax, w2
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mov 16(up), %rax
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adc %rdx, w3
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L(lo2): mov $0, R32(w1)
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mov w2, 24(rp)
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adc $0, R32(w0)
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mul v1
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add %rax, w3
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mov 24(up), %rax
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lea 32(up), up
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adc %rdx, w0
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mul v0
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lea 32(rp), rp
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add %rax, w3
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adc %rdx, w0
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mov -8(up), %rax
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adc $0, R32(w1)
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sub $4, n
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ja L(top)
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L(end): 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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