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| author | Igor Guryanov <guryanov@synopsys.com> | 2015-02-03 13:58:09 +0300 |
|---|---|---|
| committer | Alexey Brodkin <abrodkin@synopsys.com> | 2015-02-09 16:41:20 +0300 |
| commit | f958a91fa5cefd0cda76c887ee0488fb9158496e (patch) | |
| tree | eab1f7d9e7ff47bff2b0ba0503b5b25f5c20e9ce /arch/arc | |
| parent | 7f641d53bbb3a426a3bfb132d8346153e86a9d08 (diff) | |
| download | u-boot-imx-f958a91fa5cefd0cda76c887ee0488fb9158496e.zip u-boot-imx-f958a91fa5cefd0cda76c887ee0488fb9158496e.tar.gz u-boot-imx-f958a91fa5cefd0cda76c887ee0488fb9158496e.tar.bz2 | |
arc: memcmp - fix zero-delay loop utilization
It's prohibited to put branch instruction in the very end of zero-delay
loop. On execution this causes "Illegal instruction" exception.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Igor Guryanov <guryanov@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/lib/memcmp.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arc/lib/memcmp.S b/arch/arc/lib/memcmp.S index fa5aac5..87bccab 100644 --- a/arch/arc/lib/memcmp.S +++ b/arch/arc/lib/memcmp.S @@ -29,6 +29,7 @@ memcmp: ld.a %r4, [%r0, 8] ld.a %r5, [%r1, 8] brne WORD2, %r12, .Lodd + nop .Loop_end: asl_s SHIFT, SHIFT, 3 bhs_s .Last_cmp @@ -105,6 +106,7 @@ memcmp: ldb.a %r4, [%r0, 2] ldb.a %r5, [%r1, 2] brne %r3, %r12, .Lbyte_odd + nop .Lbyte_end: bcc .Lbyte_even brne %r4, %r5, .Lbyte_even |