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i965: Claim that SEND/math has two sources.

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src1 must be a descriptor (including the information to determine that
the SEND is doing an extended math operation), but src0 can actually be
null since it serves as the source of the implicit GRF -> MRF move.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner 2016-11-06 21:50:14 -08:00
parent c9724682b5
commit fce0612fc2
1 changed files with 8 additions and 1 deletions
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9
src/mesa/drivers/dri/i965/brw_eu_validate.c
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@ -96,7 +96,14 @@ num_sources_from_inst(const struct gen_device_info *devinfo,
} else if (devinfo->gen < 6 &&
brw_inst_opcode(devinfo, inst) == BRW_OPCODE_SEND) {
if (brw_inst_sfid(devinfo, inst) == BRW_SFID_MATH) {
math_function = brw_inst_math_msg_function(devinfo, inst);
/* src1 must be a descriptor (including the information to determine
* that the SEND is doing an extended math operation), but src0 can
* actually be null since it serves as the source of the implicit GRF
* to MRF move.
*
* If we stop using that functionality, we'll have to revisit this.
*/
return 2;
} else {
/* Send instructions are allowed to have null sources since they use
* the base_mrf field to specify which message register source.