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| author | Joern Rennecke <joern.rennecke@embecosm.com> | 2002-06-13 18:25:19 +0000 |
|---|---|---|
| committer | Joern Rennecke <joern.rennecke@embecosm.com> | 2002-06-13 18:25:19 +0000 |
| commit | 13f7d71fee36dda6a9bc4d81f4c5215d2d2a605a (patch) | |
| tree | 4e0dd43f29bec67347ac6510d8c77802eca19a5b /newlib/libc/machine | |
| parent | 7bbed7083231cddaf9857b60f6ec7882add424d9 (diff) | |
| download | cygnal-13f7d71fee36dda6a9bc4d81f4c5215d2d2a605a.tar.gz cygnal-13f7d71fee36dda6a9bc4d81f4c5215d2d2a605a.tar.bz2 cygnal-13f7d71fee36dda6a9bc4d81f4c5215d2d2a605a.zip | |
* libc/machine/sh/strcpy.S (strcpy, __SHMEDIA__ code):
Fix clobbering bytes before destination if src and dst have same
non-zero misalignment.
Diffstat (limited to 'newlib/libc/machine')
| -rw-r--r-- | newlib/libc/machine/sh/strcpy.S | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/newlib/libc/machine/sh/strcpy.S b/newlib/libc/machine/sh/strcpy.S index fa41cd2a5..da951cd03 100644 --- a/newlib/libc/machine/sh/strcpy.S +++ b/newlib/libc/machine/sh/strcpy.S @@ -27,9 +27,11 @@ ENTRY(strcpy) pta/l loop, tr0 ori r2,-8,r22 mcmpeq.b r5, r63, r6 - bge/u r22, r23, tr2 // no_lddst + bgt/u r22, r23, tr2 // no_lddst - // r22 < r23 ; Need to do a load from the destination. + // r22 < r23 : Need to do a load from the destination. + // r22 == r23 : Doesn't actually need to load from destination, + // but still can be handled here. ldlo.q r2, 0, r9 movi -1, r8 SHLO r8, r7, r8 @@ -41,6 +43,8 @@ ENTRY(strcpy) addi r0, 8, r0 blink tr1, r63 // shortstring no_lddst: + // r22 > r23: note that for r22 == r23 the sthi.q would clobber + // bytes before the destination region. stlo.q r2, 0, r4 SHHI r4, r7, r4 sthi.q r0, -1, r4 |