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i965/fs: Don't emit SIMD16 BFI instructions.

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Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner 2013-11-16 13:16:50 -08:00
parent 9bbedf6146
commit c4464c9eea
1 changed files with 22 additions and 1 deletions
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23
src/mesa/drivers/dri/i965/brw_fs_generator.cpp
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@ -1530,11 +1530,32 @@ fs_generator::generate_code(exec_list *instructions)
case BRW_OPCODE_BFI1:
assert(brw->gen >= 7);
brw_BFI1(p, dst, src[0], src[1]);
/* The Haswell WaForceSIMD8ForBFIInstruction workaround says that we
* should
*
* "Force BFI instructions to be executed always in SIMD8."
*/
if (dispatch_width == 16 && brw->is_haswell) {
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
brw_BFI1(p, dst, src[0], src[1]);
brw_set_compression_control(p, BRW_COMPRESSION_2NDHALF);
brw_BFI1(p, sechalf(dst), sechalf(src[0]), sechalf(src[1]));
brw_set_compression_control(p, BRW_COMPRESSION_COMPRESSED);
} else {
brw_BFI1(p, dst, src[0], src[1]);
}
break;
case BRW_OPCODE_BFI2:
assert(brw->gen >= 7);
brw_set_access_mode(p, BRW_ALIGN_16);
/* The Haswell WaForceSIMD8ForBFIInstruction workaround says that we
* should
*
* "Force BFI instructions to be executed always in SIMD8."
*
* Otherwise we would be able to emit compressed instructions like we
* do for the other three-source instructions.
*/
if (dispatch_width == 16) {
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
brw_BFI2(p, dst, src[0], src[1], src[2]);