diff options
Diffstat (limited to 'sysdeps/powerpc/sub_n.S')
| -rw-r--r-- | sysdeps/powerpc/sub_n.S | 44 |
1 files changed, 22 insertions, 22 deletions
diff --git a/sysdeps/powerpc/sub_n.S b/sysdeps/powerpc/sub_n.S index 7af577d835..d839a5f858 100644 --- a/sysdeps/powerpc/sub_n.S +++ b/sysdeps/powerpc/sub_n.S @@ -1,5 +1,5 @@ /* Subtract two limb vectors of equal, non-zero length for PowerPC. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 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 @@ -29,40 +29,40 @@ EALIGN(__mpn_sub_n,3,1) /* Set up for loop below. */ - mtcrf 0x01,%r6 - srwi. %r7,%r6,1 - mtctr %r7 + mtcrf 0x01,r6 + srwi. r7,r6,1 + mtctr r7 bt 31,2f /* Set the carry (clear the borrow). */ - subfc %r0,%r0,%r0 + subfc r0,r0,r0 /* Adjust pointers for loop. */ - addi %r3,%r3,-4 - addi %r4,%r4,-4 - addi %r5,%r5,-4 + addi r3,r3,-4 + addi r4,r4,-4 + addi r5,r5,-4 b 0f -2: lwz %r7,0(%r5) - lwz %r6,0(%r4) - subfc %r6,%r7,%r6 - stw %r6,0(%r3) +2: lwz r7,0(r5) + lwz r6,0(r4) + subfc r6,r7,r6 + stw r6,0(r3) beq 1f /* Align start of loop to an odd word boundary to guarantee that the last two words can be fetched in one access (for 601). This turns out to be important. */ 0: - lwz %r9,4(%r4) - lwz %r8,4(%r5) - lwzu %r6,8(%r4) - lwzu %r7,8(%r5) - subfe %r8,%r8,%r9 - stw %r8,4(%r3) - subfe %r6,%r7,%r6 - stwu %r6,8(%r3) + lwz r9,4(r4) + lwz r8,4(r5) + lwzu r6,8(r4) + lwzu r7,8(r5) + subfe r8,r8,r9 + stw r8,4(r3) + subfe r6,r7,r6 + stwu r6,8(r3) bdnz 0b /* Return the borrow. */ -1: subfe %r3,%r3,%r3 - neg %r3,%r3 +1: subfe r3,r3,r3 + neg r3,r3 blr END(__mpn_sub_n) |