diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/power7/rawmemchr.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power7/rawmemchr.S | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/sysdeps/powerpc/powerpc32/power7/rawmemchr.S b/sysdeps/powerpc/powerpc32/power7/rawmemchr.S index 95252343e1..dec4db02f3 100644 --- a/sysdeps/powerpc/powerpc32/power7/rawmemchr.S +++ b/sysdeps/powerpc/powerpc32/power7/rawmemchr.S @@ -1,5 +1,5 @@ /* Optimized rawmemchr implementation for PowerPC32/POWER7 using cmpb insn. - Copyright (C) 2010 Free Software Foundation, Inc. + Copyright (C) 2010-2014 Free Software Foundation, Inc. Contributed by Luis Machado <luisgpm@br.ibm.com>. This file is part of the GNU C Library. @@ -18,27 +18,30 @@ <http://www.gnu.org/licenses/>. */ #include <sysdep.h> -#include <bp-sym.h> -#include <bp-asm.h> /* int [r3] rawmemchr (void *s [r3], int c [r4]) */ .machine power7 -ENTRY (BP_SYM(__rawmemchr)) +ENTRY (__rawmemchr) CALL_MCOUNT dcbt 0,r3 clrrwi r8,r3,2 /* Align the address to word boundary. */ /* Replicate byte to word. */ - rlwimi r4,r4,8,16,23 - rlwimi r4,r4,16,0,15 + rldimi r4,r4,8,48 + rldimi r4,r4,16,32 /* Now r4 has a word of c bytes. */ rlwinm r6,r3,3,27,28 /* Calculate padding. */ lwz r12,0(r8) /* Load word from memory. */ cmpb r5,r12,r4 /* Compare each byte against c byte. */ +#ifdef __LITTLE_ENDIAN__ + srw r5,r5,r6 + slw r5,r5,r6 +#else slw r5,r5,r6 /* Move left to discard ignored bits. */ srw r5,r5,r6 /* Bring the bits back as zeros. */ +#endif cmpwi cr7,r5,0 /* If r5 == 0, no c bytes have been found. */ bne cr7,L(done) @@ -92,10 +95,16 @@ L(loop): word from the string. Use that fact to find out what is the position of the byte inside the string. */ L(done): +#ifdef __LITTLE_ENDIAN__ + addi r0,r5,-1 + andc r0,r0,r5 + popcntw r0,r0 +#else cntlzw r0,r5 /* Count leading zeros before the match. */ - srwi r0,r0,3 /* Convert leading zeroes to bytes. */ +#endif + srwi r0,r0,3 /* Convert leading zeros to bytes. */ add r3,r8,r0 /* Return address of the matching char. */ blr -END (BP_SYM (__rawmemchr)) +END (__rawmemchr) weak_alias (__rawmemchr,rawmemchr) libc_hidden_builtin_def (__rawmemchr) |