vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
124 lines
2.5 KiB
NASM
124 lines
2.5 KiB
NASM
dnl AMD64 mpn_lshift -- mpn left shift, optimised for Atom.
|
|
|
|
dnl Contributed to the GNU project by Torbjorn Granlund.
|
|
|
|
dnl Copyright 2011, 2012 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 Intel P4 ?
|
|
C Intel core2 ?
|
|
C Intel NHM ?
|
|
C Intel SBR ?
|
|
C Intel atom 4.5
|
|
C VIA nano ?
|
|
|
|
C TODO
|
|
C * Consider using 4-way unrolling. We reach 4 c/l, but the code is 2.5 times
|
|
C larger.
|
|
|
|
C INPUT PARAMETERS
|
|
define(`rp', `%rdi')
|
|
define(`up', `%rsi')
|
|
define(`n', `%rdx')
|
|
define(`cnt', `%rcx')
|
|
|
|
ABI_SUPPORT(DOS64)
|
|
ABI_SUPPORT(STD64)
|
|
|
|
ASM_START()
|
|
TEXT
|
|
ALIGN(16)
|
|
PROLOGUE(mpn_lshift)
|
|
FUNC_ENTRY(4)
|
|
lea -8(up,n,8), up
|
|
lea -8(rp,n,8), rp
|
|
shr R32(n)
|
|
mov (up), %rax
|
|
jnc L(evn)
|
|
|
|
mov %rax, %r11
|
|
shl R8(%rcx), %r11
|
|
neg R8(%rcx)
|
|
shr R8(%rcx), %rax
|
|
test n, n
|
|
jnz L(gt1)
|
|
mov %r11, (rp)
|
|
FUNC_EXIT()
|
|
ret
|
|
|
|
L(gt1): mov -8(up), %r8
|
|
mov %r8, %r10
|
|
shr R8(%rcx), %r8
|
|
jmp L(lo1)
|
|
|
|
L(evn): mov %rax, %r10
|
|
neg R8(%rcx)
|
|
shr R8(%rcx), %rax
|
|
mov -8(up), %r9
|
|
mov %r9, %r11
|
|
shr R8(%rcx), %r9
|
|
neg R8(%rcx)
|
|
dec n
|
|
lea 8(rp), rp
|
|
lea -8(up), up
|
|
jz L(end)
|
|
|
|
ALIGN(8)
|
|
L(top): shl R8(%rcx), %r10
|
|
or %r10, %r9
|
|
shl R8(%rcx), %r11
|
|
neg R8(%rcx)
|
|
mov -8(up), %r8
|
|
mov %r8, %r10
|
|
mov %r9, -8(rp)
|
|
shr R8(%rcx), %r8
|
|
lea -16(rp), rp
|
|
L(lo1): mov -16(up), %r9
|
|
or %r11, %r8
|
|
mov %r9, %r11
|
|
shr R8(%rcx), %r9
|
|
lea -16(up), up
|
|
neg R8(%rcx)
|
|
mov %r8, (rp)
|
|
dec n
|
|
jg L(top)
|
|
|
|
L(end): shl R8(%rcx), %r10
|
|
or %r10, %r9
|
|
shl R8(%rcx), %r11
|
|
mov %r9, -8(rp)
|
|
mov %r11, -16(rp)
|
|
FUNC_EXIT()
|
|
ret
|
|
EPILOGUE()
|