diff options
Diffstat (limited to 'sysdeps/powerpc/lshift.S')
| -rw-r--r-- | sysdeps/powerpc/lshift.S | 88 |
1 files changed, 44 insertions, 44 deletions
diff --git a/sysdeps/powerpc/lshift.S b/sysdeps/powerpc/lshift.S index b1487a1c17..2d3b996f54 100644 --- a/sysdeps/powerpc/lshift.S +++ b/sysdeps/powerpc/lshift.S @@ -1,5 +1,5 @@ /* Shift a limb left, low level routine. - Copyright (C) 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1999 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 @@ -23,68 +23,68 @@ 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 + 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) -0: lwzu %r10,-4(%r4) - slw %r9,%r11,%r6 - srw %r12,%r10,%r8 - or %r9,%r9,%r12 - stwu %r9,-4(%r7) +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) + lwzu r11,-4(r4) + slw r9,r10,r6 + srw r12,r11,r8 + or r9,r9,r12 + stwu r9,-4(r7) bdnz 0b -L(end1):slw %r0,%r11,%r6 - stw %r0,-4(%r7) +L(end1):slw r0,r11,r6 + stw r0,-4(r7) blr /* Guaranteed not to succeed. */ -L(boom): tweq %r0,%r0 +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 - 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 +L(big): mflr 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 bctr -L(end2):slw %r0,%r10,%r6 - stw %r0,-4(%r7) +L(end2):slw r0,r10,r6 + stw r0,-4(r7) blr #define DO_LSHIFT(n) \ - mtctr %r5; \ -0: lwzu %r10,-4(%r4); \ - slwi %r9,%r11,n; \ - inslwi %r9,%r10,n,32-n; \ - stwu %r9,-4(%r7); \ + mtctr r5; \ +0: 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); \ + lwzu r11,-4(r4); \ + slwi r9,r10,n; \ + inslwi r9,r11,n,32-n; \ + stwu r9,-4(r7); \ bdnz 0b; \ b L(end1) |