[llvm-commits] [compiler-rt] r107548 - in /compiler-rt/trunk/lib/arm: bswapdi2.S bswapsi2.S

[Nick Kledzik]

Author: kledzik
Date: Fri Jul  2 19:12:47 2010
New Revision: 107548

URL: http://llvm.org/viewvc/llvm-project?rev=107548&view=rev
Log:
ARM before armv6 did not supprt 'rev' instruction

Modified:
    compiler-rt/trunk/lib/arm/bswapdi2.S
    compiler-rt/trunk/lib/arm/bswapsi2.S

Modified: compiler-rt/trunk/lib/arm/bswapdi2.S
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/arm/bswapdi2.S?rev=107548&r1=107547&r2=107548&view=diff
==============================================================================
--- compiler-rt/trunk/lib/arm/bswapdi2.S (original)
+++ compiler-rt/trunk/lib/arm/bswapdi2.S Fri Jul  2 19:12:47 2010
@@ -16,8 +16,28 @@
 //
 	.align 2
 DEFINE_COMPILERRT_FUNCTION(__bswapdi2)
+#if __ARM_ARCH_5TEJ__ || __ARM_ARCH_4T__
+	// before armv6 does not have "rev" instruction
+	stmfd	sp!, {r7, lr}
+	mov	r7, sp
+	mov	r2, #255, 24
+	and	r3, r2, r1, lsr #8
+	mov	r12, #255, 16
+	and	lr, r12, r1, lsl #8
+	orr	r3, r3, r1, lsr #24
+	orr	r1, lr, r1, lsl #24
+	and	r2, r2, r0, lsr #8
+	orr	r3, r1, r3
+	orr	r1, r2, r0, lsr #24
+	and	r2, r12, r0, lsl #8
+	orr	r0, r2, r0, lsl #24
+	orr	r1, r0, r1
+	mov	r0, r3
+	ldmfd	sp!, {r7, pc}
+#else
 	rev	r2, r1		// reverse bytes in high 32-bits into temp2
 	rev	r3, r0		// reverse bytes in low 32-bit into temp3
 	mov	r0, r2		// set low 32-bits of result to temp2
 	mov	r1, r3		// set high 32-bits of result to temp3
 	bx	lr
+#endif

Modified: compiler-rt/trunk/lib/arm/bswapsi2.S
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/arm/bswapsi2.S?rev=107548&r1=107547&r2=107548&view=diff
==============================================================================
--- compiler-rt/trunk/lib/arm/bswapsi2.S (original)
+++ compiler-rt/trunk/lib/arm/bswapsi2.S Fri Jul  2 19:12:47 2010
@@ -16,5 +16,16 @@
 //
 	.align 2
 DEFINE_COMPILERRT_FUNCTION(__bswapsi2)
+#if __ARM_ARCH_5TEJ__ || __ARM_ARCH_4T__
+	// before armv6 does not have "rev" instruction
+	mov	r1, #255, 24
+	mov	r2, #255, 16
+	and	r1, r1, r0, lsr #8
+	and	r2, r2, r0, lsl #8
+	orr	r1, r1, r0, lsr #24
+	orr	r0, r2, r0, lsl #24
+	orr	r0, r0, r1
+#else
 	rev	r0, r0		// reverse bytes in parameter and put into result register
+#endif
 	bx	lr