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dnl AMD64 mpn_mul_1 for CPUs with mulx.
dnl Copyright 2012, 2013, 2017 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 -
C AMD K10 -
C AMD bd1 -
C AMD bd2 -
C AMD bd3 -
C AMD bd4 4.4
C AMD zen 2
C AMD bobcat -
C AMD jaguar -
C Intel P4 -
C Intel PNR -
C Intel NHM -
C Intel SBR -
C Intel IBR -
C Intel HWL ?
C Intel BWL ?
C Intel SKL ?
C Intel atom -
C Intel SLM -
C VIA nano -
define(`rp', `%rdi') C rcx
define(`up', `%rsi') C rdx
define(`n_param', `%rdx') C r8
define(`v0_param',`%rcx') C r9
define(`n', `%rcx')
define(`v0', `%rdx')
ABI_SUPPORT(DOS64)
ABI_SUPPORT(STD64)
ASM_START()
TEXT
ALIGN(16)
PROLOGUE(mpn_mul_1c)
FUNC_ENTRY(4)
IFDOS(` mov 56(%rsp), %r8 ')
jmp L(ent)
EPILOGUE()
ALIGN(16)
PROLOGUE(mpn_mul_1)
FUNC_ENTRY(4)
xor R32(%r8), R32(%r8) C carry-in limb
L(ent): mov (up), %r9
push %rbx
push %r12
push %r13
lea (up,n_param,8), up
lea -32(rp,n_param,8), rp
mov R32(n_param), R32(%rax)
xchg v0_param, v0 C FIXME: is this insn fast?
neg n
and $3, R8(%rax)
jz L(b0)
cmp $2, R8(%rax)
jz L(b2)
jg L(b3)
L(b1): mov %r8, %r12
mulx( %r9, %rbx, %rax)
sub $-1, n
jz L(wd1)
.byte 0xc4,0x62,0xb3,0xf6,0x04,0xce C mulx (up,n,8), %r9, %r8
.byte 0xc4,0x62,0xa3,0xf6,0x54,0xce,0x08 C mulx 8(up,n,8), %r11, %r10
add %r12, %rbx
jmp L(lo1)
L(b3): mulx( %r9, %r11, %r10)
.byte 0xc4,0x62,0x93,0xf6,0x64,0xce,0x08 C mulx 8(up,n,8), %r13, %r12
.byte 0xc4,0xe2,0xe3,0xf6,0x44,0xce,0x10 C mulx 16(up,n,8), %rbx, %rax
sub $-3, n
jz L(wd3)
add %r8, %r11
jmp L(lo3)
L(b2): mov %r8, %r10 C carry-in limb
mulx( %r9, %r13, %r12)
.byte 0xc4,0xe2,0xe3,0xf6,0x44,0xce,0x08 C mulx 8(up,n,8), %rbx, %rax
sub $-2, n
jz L(wd2)
.byte 0xc4,0x62,0xb3,0xf6,0x04,0xce C mulx (up,n,8), %r9, %r8
add %r10, %r13
jmp L(lo2)
L(b0): mov %r8, %rax C carry-in limb
mulx( %r9, %r9, %r8)
.byte 0xc4,0x62,0xa3,0xf6,0x54,0xce,0x08 C mulx 8(up,n,8), %r11, %r10
.byte 0xc4,0x62,0x93,0xf6,0x64,0xce,0x10 C mulx 16(up,n,8), %r13, %r12
add %rax, %r9
jmp L(lo0)
L(top): jrcxz L(end)
adc %r8, %r11
mov %r9, (rp,n,8)
L(lo3): .byte 0xc4,0x62,0xb3,0xf6,0x04,0xce C mulx (up,n,8), %r9, %r8
adc %r10, %r13
mov %r11, 8(rp,n,8)
L(lo2): .byte 0xc4,0x62,0xa3,0xf6,0x54,0xce,0x08 C mulx 8(up,n,8), %r11, %r10
adc %r12, %rbx
mov %r13, 16(rp,n,8)
L(lo1): .byte 0xc4,0x62,0x93,0xf6,0x64,0xce,0x10 C mulx 16(up,n,8), %r13, %r12
adc %rax, %r9
mov %rbx, 24(rp,n,8)
L(lo0): .byte 0xc4,0xe2,0xe3,0xf6,0x44,0xce,0x18 C mulx 24(up,n,8), %rbx, %rax
lea 4(n), n
jmp L(top)
L(end): mov %r9, (rp)
L(wd3): adc %r8, %r11
mov %r11, 8(rp)
L(wd2): adc %r10, %r13
mov %r13, 16(rp)
L(wd1): adc %r12, %rbx
adc $0, %rax
mov %rbx, 24(rp)
pop %r13
pop %r12
pop %rbx
FUNC_EXIT()
ret
EPILOGUE()
ASM_END()
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