[x265] [PATCH] testharness.h: Fix register width when reading CNTVCT_EL0

[George Steed]

Clang emits a warning here since `a` is a 32-bit variable but CNTVCT_EL0
is a 64-bit register. Suppress this warning by explicitly giving the
destination register an x-register operand modifier to ensure the read
is done as 64-bits to match.
---
 source/test/testharness.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/test/testharness.h b/source/test/testharness.h
index af49a910e..368c865ee 100644
--- a/source/test/testharness.h
+++ b/source/test/testharness.h
@@ -89,7 +89,7 @@ static inline uint32_t __rdtsc(void)
     a = clock();
 #elif  X265_ARCH_ARM64
     asm volatile("isb" : : : "memory");
-    asm volatile("mrs %0, cntvct_el0" : "=r"(a));
+    asm volatile("mrs %x0, cntvct_el0" : "=r"(a));
 #endif
     return a;
 }
-- 
2.34.1

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