[U-Boot] [PATCH 01/12] arc: memcmp - fix zero-delay loop utilization

[Alexey Brodkin]

From: Igor Guryanov <guryanov at synopsys.com>

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 at synopsys.com>
Signed-off-by: Igor Guryanov <guryanov at synopsys.com>
---
 arch/arc/lib/memcmp.S | 2 ++
 1 file changed, 2 insertions(+)

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
-- 
2.1.0