diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/cris/arch-v10/lib/memset.c | 82 |
1 files changed, 41 insertions, 41 deletions
diff --git a/arch/cris/arch-v10/lib/memset.c b/arch/cris/arch-v10/lib/memset.c index 82bb6683917..42c1101043a 100644 --- a/arch/cris/arch-v10/lib/memset.c +++ b/arch/cris/arch-v10/lib/memset.c @@ -66,7 +66,7 @@ void *memset(void *pdst, { register char *dst __asm__ ("r13") = pdst; - + /* This is NONPORTABLE, but since this whole routine is */ /* grossly nonportable that doesn't matter. */ @@ -110,52 +110,52 @@ void *memset(void *pdst, If you want to check that the allocation was right; then check the equalities in the first comment. It should say "r13=r13, r12=r12, r11=r11" */ - __asm__ volatile (" - ;; Check that the following is true (same register names on - ;; both sides of equal sign, as in r8=r8): - ;; %0=r13, %1=r12, %4=r11 - ;; - ;; Save the registers we'll clobber in the movem process - ;; on the stack. Don't mention them to gcc, it will only be - ;; upset. - subq 11*4,$sp - movem $r10,[$sp] - - move.d $r11,$r0 - move.d $r11,$r1 - move.d $r11,$r2 - move.d $r11,$r3 - move.d $r11,$r4 - move.d $r11,$r5 - move.d $r11,$r6 - move.d $r11,$r7 - move.d $r11,$r8 - move.d $r11,$r9 - move.d $r11,$r10 - - ;; Now we've got this: - ;; r13 - dst - ;; r12 - n - - ;; Update n for the first loop - subq 12*4,$r12 -0: - subq 12*4,$r12 - bge 0b - movem $r11,[$r13+] - - addq 12*4,$r12 ;; compensate for last loop underflowing n - - ;; Restore registers from stack - movem [$sp+],$r10" + __asm__ volatile ("\n\ + ;; Check that the following is true (same register names on \n\ + ;; both sides of equal sign, as in r8=r8): \n\ + ;; %0=r13, %1=r12, %4=r11 \n\ + ;; \n\ + ;; Save the registers we'll clobber in the movem process \n\ + ;; on the stack. Don't mention them to gcc, it will only be \n\ + ;; upset. \n\ + subq 11*4,$sp \n\ + movem $r10,[$sp] \n\ + \n\ + move.d $r11,$r0 \n\ + move.d $r11,$r1 \n\ + move.d $r11,$r2 \n\ + move.d $r11,$r3 \n\ + move.d $r11,$r4 \n\ + move.d $r11,$r5 \n\ + move.d $r11,$r6 \n\ + move.d $r11,$r7 \n\ + move.d $r11,$r8 \n\ + move.d $r11,$r9 \n\ + move.d $r11,$r10 \n\ + \n\ + ;; Now we've got this: \n\ + ;; r13 - dst \n\ + ;; r12 - n \n\ + \n\ + ;; Update n for the first loop \n\ + subq 12*4,$r12 \n\ +0: \n\ + subq 12*4,$r12 \n\ + bge 0b \n\ + movem $r11,[$r13+] \n\ + \n\ + addq 12*4,$r12 ;; compensate for last loop underflowing n \n\ + \n\ + ;; Restore registers from stack \n\ + movem [$sp+],$r10" /* Outputs */ : "=r" (dst), "=r" (n) /* Inputs */ : "0" (dst), "1" (n), "r" (lc)); - + } /* Either we directly starts copying, using dword copying - in a loop, or we copy as much as possible with 'movem' + in a loop, or we copy as much as possible with 'movem' and then the last block (<44 bytes) is copied here. This will work since 'movem' will have updated src,dst,n. */ |