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.
111 lines
2.6 KiB
NASM
111 lines
2.6 KiB
NASM
dnl Itanium-2 mpn_gcd_11
|
|
|
|
dnl Copyright 2002-2005, 2012, 2013, 2015, 2019 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/bitpair (1x1 gcd)
|
|
C Itanium: ?
|
|
C Itanium 2: 4.5
|
|
|
|
|
|
ASM_START()
|
|
|
|
C ctz_table[n] is the number of trailing zeros on n, or MAXSHIFT if n==0.
|
|
|
|
deflit(MAXSHIFT, 7)
|
|
deflit(MASK, eval((m4_lshift(1,MAXSHIFT))-1))
|
|
|
|
.rodata
|
|
ALIGN(m4_lshift(1,MAXSHIFT)) C align table to allow using dep
|
|
ctz_table:
|
|
data1 MAXSHIFT
|
|
forloop(i,1,MASK,
|
|
` data1 m4_count_trailing_zeros(i)-1
|
|
')
|
|
|
|
define(`x0', r32)
|
|
define(`y0', r33)
|
|
|
|
PROLOGUE(mpn_gcd_11)
|
|
.prologue
|
|
.body
|
|
addl r22 = @ltoff(ctz_table), r1
|
|
;;
|
|
ld8 r22 = [r22]
|
|
br L(ent)
|
|
;;
|
|
|
|
ALIGN(32)
|
|
L(top):
|
|
.pred.rel "mutex", p6,p7
|
|
{.mmi; (p7) mov y0 = x0
|
|
(p6) sub x0 = x0, y0
|
|
dep r21 = r19, r22, 0, MAXSHIFT C concat(table,lowbits)
|
|
}{.mmi; and r20 = MASK, r19
|
|
(p7) mov x0 = r19
|
|
and r23 = 6, r19
|
|
;;
|
|
}{.mmi; cmp.eq p6,p0 = 4, r23
|
|
cmp.eq p7,p0 = 0, r23
|
|
shr.u x0 = x0, 1 C shift-by-1, always OK
|
|
}{.mmb; ld1 r16 = [r21]
|
|
cmp.eq p10,p0 = 0, r20
|
|
(p10) br.spnt.few.clr L(count_better)
|
|
;;
|
|
}
|
|
L(bck):
|
|
.pred.rel "mutex", p6,p7
|
|
{.mii; nop 0
|
|
(p6) shr.u x0 = x0, 1 C u was ...100 before shift-by-1 above
|
|
(p7) shr.u x0 = x0, r16 C u was ...000 before shift-by-1 above
|
|
;;
|
|
}
|
|
L(ent):
|
|
{.mmi; sub r19 = y0, x0
|
|
cmp.gtu p6,p7 = x0, y0
|
|
cmp.ne p8,p0 = x0, y0
|
|
}{.mmb; nop 0
|
|
nop 0
|
|
(p8) br.sptk.few.clr L(top)
|
|
}
|
|
|
|
L(end): mov r8 = y0
|
|
br.ret.sptk.many b0
|
|
|
|
L(count_better):
|
|
add r20 = -1, x0
|
|
;;
|
|
andcm r23 = r20, x0
|
|
;;
|
|
popcnt r16 = r23
|
|
br L(bck)
|
|
EPILOGUE()
|