glibc/sysdeps/sparc/sparc64/lshift.S
Ulrich Drepper 8cb079d41b Update.
* sysdeps/sparc/sparc64/add_n.S: Avoid using %g2, %g3, %g7 registers
	as much as possible. Declare them using .register pseudo-op if they
	are still used.
	* sysdeps/sparc/sparc64/lshift.S: Likewise.
	* sysdeps/sparc/sparc64/memchr.S: Likewise.
	* sysdeps/sparc/sparc64/memcmp.S: Likewise.
	* sysdeps/sparc/sparc64/memcpy.S: Likewise.
	* sysdeps/sparc/sparc64/memset.S: Likewise.
	* sysdeps/sparc/sparc64/rawmemchr.S: Likewise.
	* sysdeps/sparc/sparc64/rshift.S: Likewise.
	* sysdeps/sparc/sparc64/stpcpy.S: Likewise.
	* sysdeps/sparc/sparc64/stpncpy.S: Likewise.
	* sysdeps/sparc/sparc64/strcat.S: Likewise.
	* sysdeps/sparc/sparc64/strchr.S: Likewise.
	* sysdeps/sparc/sparc64/strcmp.S: Likewise.
	* sysdeps/sparc/sparc64/strcpy.S: Likewise.
	* sysdeps/sparc/sparc64/strcspn.S: Likewise.
	* sysdeps/sparc/sparc64/strlen.S: Likewise.
	* sysdeps/sparc/sparc64/strncmp.S: Likewise.
	* sysdeps/sparc/sparc64/strncpy.S: Likewise.
	* sysdeps/sparc/sparc64/strpbrk.S: Likewise.
	* sysdeps/sparc/sparc64/strspn.S: Likewise.
	* sysdeps/sparc/sparc64/sub_n.S: Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h: Likewise.
	Optimize trampoline code for .plt4-.plt32767.
	Fix trampolines for .plt32768+.

1999-07-25  Jakub Jelinek  <jj@ultra.linux.cz>
1999-07-27 04:43:32 +00:00

97 lines
2.2 KiB
ArmAsm

/* SPARC v9 __mpn_lshift --
Copyright (C) 1996, 1999 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The GNU MP Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <sysdep.h>
/* INPUT PARAMETERS
res_ptr %o0
src_ptr %o1
size %o2
cnt %o3 */
.register %g2, #scratch
.register %g3, #scratch
ENTRY(__mpn_lshift)
sllx %o2,3,%g1
add %o1,%g1,%o1 ! make %o1 point at end of src
ldx [%o1-8],%g2 ! load first limb
sub %g0,%o3,%o5 ! negate shift count
add %o0,%g1,%o0 ! make %o0 point at end of res
add %o2,-1,%o2
andcc %o2,4-1,%g4 ! number of limbs in first loop
srlx %g2,%o5,%g1 ! compute function result
be,pn %xcc,.L0 ! if multiple of 4 limbs, skip first loop
mov %g1,%g5
sub %o2,%g4,%o2 ! adjust count for main loop
.Loop0: ldx [%o1-16],%g3
add %o0,-8,%o0
add %o1,-8,%o1
sllx %g2,%o3,%o4
addcc %g4,-1,%g4
srlx %g3,%o5,%g1
mov %g3,%g2
or %o4,%g1,%o4
bne,pt %xcc,.Loop0
stx %o4,[%o0+0]
.L0: brz,pn %o2,.Lend
nop
.Loop: ldx [%o1-16],%g3
add %o0,-32,%o0
sllx %g2,%o3,%o4
addcc %o2,-4,%o2
srlx %g3,%o5,%g1
ldx [%o1-24],%g2
sllx %g3,%o3,%g4
or %o4,%g1,%o4
stx %o4,[%o0+24]
srlx %g2,%o5,%g1
ldx [%o1-32],%g3
sllx %g2,%o3,%o4
or %g4,%g1,%g4
stx %g4,[%o0+16]
srlx %g3,%o5,%g1
ldx [%o1-40],%g2
sllx %g3,%o3,%g4
or %o4,%g1,%o4
stx %o4,[%o0+8]
srlx %g2,%o5,%g1
add %o1,-32,%o1
or %g4,%g1,%g4
bne,pt %xcc,.Loop
stx %g4,[%o0+0]
.Lend: sllx %g2,%o3,%g2
stx %g2,[%o0-8]
jmpl %o7+8, %g0
mov %g5,%o0
END(__mpn_lshift)