diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc64')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/a2/memcpy.S | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/sysdeps/powerpc/powerpc64/a2/memcpy.S b/sysdeps/powerpc/powerpc64/a2/memcpy.S index ac95171aa8..f0c17ce032 100644 --- a/sysdeps/powerpc/powerpc64/a2/memcpy.S +++ b/sysdeps/powerpc/powerpc64/a2/memcpy.S @@ -1,5 +1,5 @@ /* Optimized memcpy implementation for PowerPC A2. - Copyright (C) 2010 Free Software Foundation, Inc. + Copyright (C) 2010,2012 Free Software Foundation, Inc. Contributed by Michael Brutman <brutman@us.ibm.com>. This file is part of the GNU C Library. @@ -117,9 +117,35 @@ EALIGN (BP_SYM (memcpy), 5, 0) .align 4 L(dst_aligned): + cmpdi cr0,r9,0 /* Cache line size set? */ + bne+ cr0,L(cachelineset) + +/* __cache_line_size not set: generic byte copy without much optimization */ + clrldi. r0,r5,63 /* 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 at dest */ + addi r6,r6,1 /* Update dest pointer address */ +L(cachelinenotset_align): + cmpdi 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 - cmpd cr5,r5,r10 /* Less than a cacheline to go? */ +L(cachelineset): + cmpd cr5,r5,r10 /* Less than a cacheline to go? */ neg r7,r6 /* How far to next cacheline bdy? */ |