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i965/vs: Fix gen4 comparisons used for predication.

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When we tried to retype a brw_null_reg() in CMP(), the retyping didn't
take effect because HW_REG just ignores the type field.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt
2011-09-02 16:46:46 -07:00
parent 8adcad213e
commit 2ffc5ac1da
1 changed files with 4 additions and 1 deletions
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src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+4 -1
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@@ -203,8 +203,11 @@ vec4_visitor::CMP(dst_reg dst, src_reg src0, src_reg src1, uint32_t condition)
* before before comparison, producing garbage results for floating
* point comparisons.
*/
if (intel->gen == 4)
if (intel->gen == 4) {
dst.type = src0.type;
if (dst.file == HW_REG)
dst.fixed_hw_reg.type = dst.type;
}
inst = new(mem_ctx) vec4_instruction(this, BRW_OPCODE_CMP, dst, src0, src1);
inst->conditional_mod = condition;