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|
# Shift a limb left, low level routine.
# Copyright (C) 1996, 1997 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 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 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
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with the GNU C 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.
# mp_limb_t mpn_lshift (mp_ptr wp, mp_srcptr up, mp_size_t usize,
# unsigned int cnt)
.align 3
.globl __mpn_lshift
.type __mpn_lshift,@function
__mpn_lshift:
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,Lbig # branch if size >= 16
bdz Lend1
Loop: lwzu %r10,-4(%r4)
slw %r9,%r11,%r6
srw %r12,%r10,%r8
or %r9,%r9,%r12
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slw %r9,%r10,%r6
srw %r12,%r11,%r8
or %r9,%r9,%r12
stwu %r9,-4(%r7)
bdnz Loop
b Lend1
# Guaranteed not to succeed.
LBoom: 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.
Lbig: mflr %r9
bltl %cr0,LBoom # 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
bctr
Lend1: slw %r0,%r11,%r6
stw %r0,-4(%r7)
blr
mtctr %r5
Loop1: lwzu %r10,-4(%r4)
slwi %r9,%r11,1
inslwi %r9,%r10,1,31
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,1
inslwi %r9,%r11,1,31
stwu %r9,-4(%r7)
bdnz Loop1
b Lend1
mtctr %r5
Loop2: lwzu %r10,-4(%r4)
slwi %r9,%r11,2
inslwi %r9,%r10,2,30
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,2
inslwi %r9,%r11,2,30
stwu %r9,-4(%r7)
bdnz Loop2
b Lend1
mtctr %r5
Loop3: lwzu %r10,-4(%r4)
slwi %r9,%r11,3
inslwi %r9,%r10,3,29
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,3
inslwi %r9,%r11,3,29
stwu %r9,-4(%r7)
bdnz Loop3
b Lend1
mtctr %r5
Loop4: lwzu %r10,-4(%r4)
slwi %r9,%r11,4
inslwi %r9,%r10,4,28
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,4
inslwi %r9,%r11,4,28
stwu %r9,-4(%r7)
bdnz Loop4
b Lend1
mtctr %r5
Loop5: lwzu %r10,-4(%r4)
slwi %r9,%r11,5
inslwi %r9,%r10,5,27
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,5
inslwi %r9,%r11,5,27
stwu %r9,-4(%r7)
bdnz Loop5
b Lend1
mtctr %r5
Loop6: lwzu %r10,-4(%r4)
slwi %r9,%r11,6
inslwi %r9,%r10,6,26
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,6
inslwi %r9,%r11,6,26
stwu %r9,-4(%r7)
bdnz Loop6
b Lend1
mtctr %r5
Loop7: lwzu %r10,-4(%r4)
slwi %r9,%r11,7
inslwi %r9,%r10,7,25
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,7
inslwi %r9,%r11,7,25
stwu %r9,-4(%r7)
bdnz Loop7
b Lend1
mtctr %r5
Loop8: lwzu %r10,-4(%r4)
slwi %r9,%r11,8
inslwi %r9,%r10,8,24
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,8
inslwi %r9,%r11,8,24
stwu %r9,-4(%r7)
bdnz Loop8
b Lend1
mtctr %r5
Loop9: lwzu %r10,-4(%r4)
slwi %r9,%r11,9
inslwi %r9,%r10,9,23
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,9
inslwi %r9,%r11,9,23
stwu %r9,-4(%r7)
bdnz Loop9
b Lend1
mtctr %r5
Loop10: lwzu %r10,-4(%r4)
slwi %r9,%r11,10
inslwi %r9,%r10,10,22
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,10
inslwi %r9,%r11,10,22
stwu %r9,-4(%r7)
bdnz Loop10
b Lend1
mtctr %r5
Loop11: lwzu %r10,-4(%r4)
slwi %r9,%r11,11
inslwi %r9,%r10,11,21
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,11
inslwi %r9,%r11,11,21
stwu %r9,-4(%r7)
bdnz Loop11
b Lend1
mtctr %r5
Loop12: lwzu %r10,-4(%r4)
slwi %r9,%r11,12
inslwi %r9,%r10,12,20
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,12
inslwi %r9,%r11,12,20
stwu %r9,-4(%r7)
bdnz Loop12
b Lend1
mtctr %r5
Loop13: lwzu %r10,-4(%r4)
slwi %r9,%r11,13
inslwi %r9,%r10,13,19
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,13
inslwi %r9,%r11,13,19
stwu %r9,-4(%r7)
bdnz Loop13
b Lend1
mtctr %r5
Loop14: lwzu %r10,-4(%r4)
slwi %r9,%r11,14
inslwi %r9,%r10,14,18
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,14
inslwi %r9,%r11,14,18
stwu %r9,-4(%r7)
bdnz Loop14
b Lend1
mtctr %r5
Loop15: lwzu %r10,-4(%r4)
slwi %r9,%r11,15
inslwi %r9,%r10,15,17
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,15
inslwi %r9,%r11,15,17
stwu %r9,-4(%r7)
bdnz Loop15
b Lend1
mtctr %r5
Loop16: lwzu %r10,-4(%r4)
slwi %r9,%r11,16
inslwi %r9,%r10,16,16
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,16
inslwi %r9,%r11,16,16
stwu %r9,-4(%r7)
bdnz Loop16
b Lend1
mtctr %r5
Loop17: lwzu %r10,-4(%r4)
slwi %r9,%r11,17
inslwi %r9,%r10,17,15
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,17
inslwi %r9,%r11,17,15
stwu %r9,-4(%r7)
bdnz Loop17
b Lend1
mtctr %r5
Loop18: lwzu %r10,-4(%r4)
slwi %r9,%r11,18
inslwi %r9,%r10,18,14
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,18
inslwi %r9,%r11,18,14
stwu %r9,-4(%r7)
bdnz Loop18
b Lend1
mtctr %r5
Loop19: lwzu %r10,-4(%r4)
slwi %r9,%r11,19
inslwi %r9,%r10,19,13
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,19
inslwi %r9,%r11,19,13
stwu %r9,-4(%r7)
bdnz Loop19
b Lend1
mtctr %r5
Loop20: lwzu %r10,-4(%r4)
slwi %r9,%r11,20
inslwi %r9,%r10,20,12
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,20
inslwi %r9,%r11,20,12
stwu %r9,-4(%r7)
bdnz Loop20
b Lend1
mtctr %r5
Loop21: lwzu %r10,-4(%r4)
slwi %r9,%r11,21
inslwi %r9,%r10,21,11
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,21
inslwi %r9,%r11,21,11
stwu %r9,-4(%r7)
bdnz Loop21
b Lend1
mtctr %r5
Loop22: lwzu %r10,-4(%r4)
slwi %r9,%r11,22
inslwi %r9,%r10,22,10
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,22
inslwi %r9,%r11,22,10
stwu %r9,-4(%r7)
bdnz Loop22
b Lend1
mtctr %r5
Loop23: lwzu %r10,-4(%r4)
slwi %r9,%r11,23
inslwi %r9,%r10,23,9
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,23
inslwi %r9,%r11,23,9
stwu %r9,-4(%r7)
bdnz Loop23
b Lend1
mtctr %r5
Loop24: lwzu %r10,-4(%r4)
slwi %r9,%r11,24
inslwi %r9,%r10,24,8
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,24
inslwi %r9,%r11,24,8
stwu %r9,-4(%r7)
bdnz Loop24
b Lend1
mtctr %r5
Loop25: lwzu %r10,-4(%r4)
slwi %r9,%r11,25
inslwi %r9,%r10,25,7
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,25
inslwi %r9,%r11,25,7
stwu %r9,-4(%r7)
bdnz Loop25
b Lend1
mtctr %r5
Loop26: lwzu %r10,-4(%r4)
slwi %r9,%r11,26
inslwi %r9,%r10,26,6
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,26
inslwi %r9,%r11,26,6
stwu %r9,-4(%r7)
bdnz Loop26
b Lend1
mtctr %r5
Loop27: lwzu %r10,-4(%r4)
slwi %r9,%r11,27
inslwi %r9,%r10,27,5
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,27
inslwi %r9,%r11,27,5
stwu %r9,-4(%r7)
bdnz Loop27
b Lend1
mtctr %r5
Loop28: lwzu %r10,-4(%r4)
slwi %r9,%r11,28
inslwi %r9,%r10,28,4
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,28
inslwi %r9,%r11,28,4
stwu %r9,-4(%r7)
bdnz Loop28
b Lend1
mtctr %r5
Loop29: lwzu %r10,-4(%r4)
slwi %r9,%r11,29
inslwi %r9,%r10,29,3
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,29
inslwi %r9,%r11,29,3
stwu %r9,-4(%r7)
bdnz Loop29
b Lend1
mtctr %r5
Loop30: lwzu %r10,-4(%r4)
slwi %r9,%r11,30
inslwi %r9,%r10,30,2
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,30
inslwi %r9,%r11,30,2
stwu %r9,-4(%r7)
bdnz Loop30
b Lend1
mtctr %r5
Loop31: lwzu %r10,-4(%r4)
slwi %r9,%r11,31
inslwi %r9,%r10,31,1
stwu %r9,-4(%r7)
bdz Lend2
lwzu %r11,-4(%r4)
slwi %r9,%r10,31
inslwi %r9,%r11,31,1
stwu %r9,-4(%r7)
bdnz Loop31
b Lend1
Lend2: slw %r0,%r10,%r6
stw %r0,-4(%r7)
blr
|
