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dnl AMD64 mpn_mul_1 optimised for AMD Bulldozer.
dnl Copyright 2003-2005, 2007, 2008, 2011-2013 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
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 General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb
C AMD K8,K9 3.65
C AMD K10 3.30 3.68
C AMD bull 4.04 4.29
C AMD pile 4.33
C AMD steam
C AMD excavator
C AMD bobcat 5.73
C AMD jaguar 5.87
C Intel P4 12.5
C Intel core2 4.38
C Intel NHM 4.28
C Intel SBR 2.69
C Intel IBR 2.55
C Intel HWL 2.41
C Intel BWL 2.49
C Intel SKL 2.50
C Intel atom 20.3
C Intel SLM 7.8
C VIA nano 4.25
C The loop of this code is the result of running a code generation and
C optimisation tool suite written by David Harvey and Torbjorn Granlund.
C TODO
C * Move loop code into feed-in blocks, to save insn for zeroing regs.
define(`rp', `%rdi') C rcx
define(`up', `%rsi') C rdx
define(`n_param', `%rdx') C r8
define(`v0', `%rcx') C r9
define(`n', `%rbx')
ABI_SUPPORT(DOS64)
ABI_SUPPORT(STD64)
IFDOS(` define(`up', ``%rsi'') ') dnl
IFDOS(` define(`rp', ``%rcx'') ') dnl
IFDOS(` define(`v0', ``%r9'') ') dnl
IFDOS(` define(`r9', ``rdi'') ') dnl
IFDOS(` define(`n', ``%r8'') ') dnl
IFDOS(` define(`r8', ``rbx'') ') dnl
ASM_START()
TEXT
ALIGN(16)
PROLOGUE(mpn_mul_1c)
IFDOS(``push %rsi '')
IFDOS(``push %rdi '')
IFDOS(``mov %rdx, %rsi '')
mov (up), %rax C read first u limb early
push %rbx
IFSTD(` mov n_param, %r11 ') C move away n from rdx, mul uses it
IFDOS(` mov n, %r11 ')
mul v0
IFSTD(` add %r8, %rax ')
IFDOS(` add 64(%rsp), %rax ') C 40 + 3*8 (3 push insns)
adc $0, %rdx
jmp L(common)
EPILOGUE()
ALIGN(16)
PROLOGUE(mpn_mul_1)
IFDOS(``push %rsi '')
IFDOS(``push %rdi '')
IFDOS(``mov %rdx, %rsi '')
mov (up), %rax C read first u limb early
push %rbx
IFSTD(` mov n_param, %r11 ') C move away n from rdx, mul uses it
IFDOS(` mov n, %r11 ')
mul v0
L(common):
IFSTD(` mov %r11, n ')
and $3, R32(%r11)
lea -16(rp,n,8), rp
jz L(b0)
cmp $2, R32(%r11)
jb L(b1)
jz L(b2)
L(b3): mov %rax, %r10
mov %rdx, %r11
mov 8(up), %rax
mul v0
lea (up,n,8), up
not n
jmp L(L3)
L(b0): mov %rax, %r9
mov %rdx, %r10
mov 8(up), %rax
lea (up,n,8), up
neg n
jmp L(L0)
L(b1): mov %rax, %r8
cmp $1, n
jz L(n1)
mov %rdx, %r9
lea (up,n,8), up
neg n
mov %r8, 16(rp,n,8)
inc n
jmp L(L1)
L(b2): mov %rax, %r11
mov %rdx, %r8
mov 8(up), %rax
lea (up,n,8), up
neg n
add $2, n
jns L(end)
ALIGN(16)
L(top): mul v0
mov %rdx, %r9
add %rax, %r8
adc $0, %r9
mov %r8, 8(rp,n,8)
mov %r11, (rp,n,8)
L(L1): mov (up,n,8), %rax
mul v0
add %rax, %r9
mov %rdx, %r10
mov 8(up,n,8), %rax
adc $0, %r10
L(L0): mul v0
add %rax, %r10
mov %rdx, %r11
mov 16(up,n,8), %rax
adc $0, %r11
mul v0
mov %r9, 16(rp,n,8)
L(L3): add %rax, %r11
mov %r10, 24(rp,n,8)
mov %rdx, %r8
adc $0, %r8
add $4, n
mov -8(up,n,8), %rax
js L(top)
L(end): mul v0
add %rax, %r8
adc $0, %rdx
mov %r11, (rp)
L(n1): mov %r8, 8(rp)
mov %rdx, %rax
pop %rbx
IFDOS(``pop %rdi '')
IFDOS(``pop %rsi '')
ret
EPILOGUE()
ASM_END()
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