mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 14:50:17 +00:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
126 lines
2.7 KiB
ArmAsm
126 lines
2.7 KiB
ArmAsm
/* Shift a limb left, low level routine.
|
|
Copyright (C) 1996-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
/* mp_limb_t mpn_lshift (mp_ptr wp, mp_srcptr up, mp_size_t usize,
|
|
unsigned int cnt) */
|
|
|
|
EALIGN (__mpn_lshift, 3, 0)
|
|
|
|
mtctr r5 # copy size into CTR
|
|
cmplwi cr0,r5,16 # is size < 16
|
|
slwi r0,r5,2
|
|
add r7,r3,r0 # make r7 point at end of res
|
|
add r4,r4,r0 # make r4 point at end of s1
|
|
lwzu r11,-4(r4) # load first s1 limb
|
|
subfic r8,r6,32
|
|
srw r3,r11,r8 # compute function return value
|
|
bge cr0,L(big) # branch if size >= 16
|
|
|
|
bdz L(end1)
|
|
|
|
L(0): lwzu r10,-4(r4)
|
|
slw r9,r11,r6
|
|
srw r12,r10,r8
|
|
or r9,r9,r12
|
|
stwu r9,-4(r7)
|
|
bdz L(end2)
|
|
lwzu r11,-4(r4)
|
|
slw r9,r10,r6
|
|
srw r12,r11,r8
|
|
or r9,r9,r12
|
|
stwu r9,-4(r7)
|
|
bdnz L(0)
|
|
|
|
L(end1):slw r0,r11,r6
|
|
stw r0,-4(r7)
|
|
blr
|
|
|
|
|
|
/* Guaranteed not to succeed. */
|
|
L(boom): tweq r0,r0
|
|
|
|
/* We imitate a case statement, by using (yuk!) fixed-length code chunks,
|
|
of size 4*12 bytes. We have to do this (or something) to make this PIC. */
|
|
L(big): mflr r9
|
|
cfi_register(lr,r9)
|
|
bltl- cr0,L(boom) # Never taken, only used to set LR.
|
|
slwi r10,r6,4
|
|
mflr r12
|
|
add r10,r12,r10
|
|
slwi r8,r6,5
|
|
add r10,r8,r10
|
|
mtctr r10
|
|
addi r5,r5,-1
|
|
mtlr r9
|
|
cfi_same_value (lr)
|
|
bctr
|
|
|
|
L(end2):slw r0,r10,r6
|
|
stw r0,-4(r7)
|
|
blr
|
|
|
|
#define DO_LSHIFT(n) \
|
|
mtctr r5; \
|
|
L(n): lwzu r10,-4(r4); \
|
|
slwi r9,r11,n; \
|
|
inslwi r9,r10,n,32-n; \
|
|
stwu r9,-4(r7); \
|
|
bdz- L(end2); \
|
|
lwzu r11,-4(r4); \
|
|
slwi r9,r10,n; \
|
|
inslwi r9,r11,n,32-n; \
|
|
stwu r9,-4(r7); \
|
|
bdnz L(n); \
|
|
b L(end1)
|
|
|
|
DO_LSHIFT(1)
|
|
DO_LSHIFT(2)
|
|
DO_LSHIFT(3)
|
|
DO_LSHIFT(4)
|
|
DO_LSHIFT(5)
|
|
DO_LSHIFT(6)
|
|
DO_LSHIFT(7)
|
|
DO_LSHIFT(8)
|
|
DO_LSHIFT(9)
|
|
DO_LSHIFT(10)
|
|
DO_LSHIFT(11)
|
|
DO_LSHIFT(12)
|
|
DO_LSHIFT(13)
|
|
DO_LSHIFT(14)
|
|
DO_LSHIFT(15)
|
|
DO_LSHIFT(16)
|
|
DO_LSHIFT(17)
|
|
DO_LSHIFT(18)
|
|
DO_LSHIFT(19)
|
|
DO_LSHIFT(20)
|
|
DO_LSHIFT(21)
|
|
DO_LSHIFT(22)
|
|
DO_LSHIFT(23)
|
|
DO_LSHIFT(24)
|
|
DO_LSHIFT(25)
|
|
DO_LSHIFT(26)
|
|
DO_LSHIFT(27)
|
|
DO_LSHIFT(28)
|
|
DO_LSHIFT(29)
|
|
DO_LSHIFT(30)
|
|
DO_LSHIFT(31)
|
|
|
|
END (__mpn_lshift)
|