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-rw-r--r--src/mesa/drivers/dri/i965/brw_defines.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_defines.h b/src/mesa/drivers/dri/i965/brw_defines.h
index 0fc24a7ede9..78df0b89672 100644
--- a/src/mesa/drivers/dri/i965/brw_defines.h
+++ b/src/mesa/drivers/dri/i965/brw_defines.h
@@ -30,7 +30,13 @@
*/
#define INTEL_MASK(high, low) (((1<<((high)-(low)+1))-1)<<(low))
-#define SET_FIELD(value, field) (((value) << field ## _SHIFT) & field ## _MASK)
+#define SET_FIELD(value, field) \
+ ({ \
+ uint32_t fieldval = (value) << field ## _SHIFT; \
+ assert((fieldval & ~ field ## _MASK) == 0); \
+ fieldval & field ## _MASK; \
+ })
+
#define GET_FIELD(word, field) (((word) & field ## _MASK) >> field ## _SHIFT)
#ifndef BRW_DEFINES_H