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i965: Add an assert for when SET_FIELD's value exceeds the field size.

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This was one of the things we always wanted to do to this, to make it more
useful than just (value << FIELD_MASK).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
This commit is contained in:
Eric Anholt 2013-12-23 01:39:42 -08:00
parent 98cdb2ceed
commit 5d2e86924e
1 changed files with 7 additions and 1 deletions
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8
src/mesa/drivers/dri/i965/brw_defines.h
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@ -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