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| author | Stanislav Sedov <stas@FreeBSD.org> | 2009-06-21 13:15:56 +0000 |
|---|---|---|
| committer | Stanislav Sedov <stas@FreeBSD.org> | 2009-06-21 13:15:56 +0000 |
| commit | c61860f8a69d4b724b33c08e09a870076da4cace (patch) | |
| tree | b6704a7bb7e39328a6c39a13798602228aa50e7e | |
| parent | b24516038c91fd0b8493122aa44dcb50537c0377 (diff) | |
| download | src-c61860f8a69d4b724b33c08e09a870076da4cace.tar.gz src-c61860f8a69d4b724b33c08e09a870076da4cace.zip | |
- Eliminate extra subcs instruction. I have not noticed before that we
always perform substraction now, so no instruction could be rordered
to eliminate the conditional substraction.
Notes
Notes:
svn path=/head/; revision=194585
| -rw-r--r-- | lib/libc/arm/string/strncmp.S | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/lib/libc/arm/string/strncmp.S b/lib/libc/arm/string/strncmp.S index 5beff413614f..fce01591c0e2 100644 --- a/lib/libc/arm/string/strncmp.S +++ b/lib/libc/arm/string/strncmp.S @@ -40,10 +40,9 @@ ENTRY(strncmp) /* ip == last src address to compare */ adds ip, r0, r2 - sub ip, ip, #1 /* Use last possible address on overflow. */ movcs ip, #0 - subcs ip, ip, #1 + sub ip, ip, #1 1: ldrb r2, [r0], #1 ldrb r3, [r1], #1 |