diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/a2/memcpy.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/a2/memcpy.S | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/sysdeps/powerpc/powerpc32/a2/memcpy.S b/sysdeps/powerpc/powerpc32/a2/memcpy.S index f4c3c18414..0e9d18e085 100644 --- a/sysdeps/powerpc/powerpc32/a2/memcpy.S +++ b/sysdeps/powerpc/powerpc32/a2/memcpy.S @@ -1,5 +1,5 @@ /* Optimized memcpy implementation for PowerPC A2. - Copyright (C) 2010, 2011 Free Software Foundation, Inc. + Copyright (C) 2010, 2011, 2012 Free Software Foundation, Inc. Contributed by Michael Brutman <brutman@us.ibm.com>. This file is part of the GNU C Library. @@ -126,8 +126,29 @@ L(dst_aligned): cmplwi cr5, r9, 0 bne+ cr5,L(cachelineset) - li r9,64 +/* __cache_line_size not set: generic byte copy without much optimization */ + andi. r0,r5,1 /* If length is odd copy one byte. */ + beq L(cachelinenotset_align) + lbz r7,0(r4) /* Read one byte from source. */ + addi r5,r5,-1 /* Update length. */ + addi r4,r4,1 /* Update source pointer address. */ + stb r7,0(r6) /* Store one byte on dest. */ + addi r6,r6,1 /* Update dest pointer address. */ +L(cachelinenotset_align): + cmpwi cr7,r5,0 /* If length is 0 return. */ + beqlr cr7 + ori r2,r2,0 /* Force a new dispatch group. */ +L(cachelinenotset_loop): + addic. r5,r5,-2 /* Update length. */ + lbz r7,0(r4) /* Load 2 bytes from source. */ + lbz r8,1(r4) + addi r4,r4,2 /* Update source pointer address. */ + stb r7,0(r6) /* Store 2 bytes on dest. */ + stb r8,1(r6) + addi r6,r6,2 /* Update dest pointer address. */ + bne L(cachelinenotset_loop) + blr L(cachelineset): |