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authorMatt Turner <mattst88@gmail.com>2015-10-20 18:23:50 -0700
committerMatt Turner <mattst88@gmail.com>2015-10-22 12:26:54 -0700
commite2344e11ce8ddefb89a222bbf63a7c60e8ba5655 (patch)
tree58767764343979f84c76741d2fcccca815020ce9 /src
parente10fc055e7dc5281f03a77088a24392098e3473b (diff)
i965/fs: Trim unneeded channels in SampleID setup.
The AND and SHR produce a scalar value that we had been replicating across $dispatch_width channels. The immediate MOV produces only four useful channels of data. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Diffstat (limited to 'src')
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs.cpp12
1 files changed, 6 insertions, 6 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 3cb8190b02a..71da9d9f7b6 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1282,9 +1282,9 @@ fs_visitor::emit_sampleid_setup()
fs_reg *reg = new(this->mem_ctx) fs_reg(vgrf(glsl_type::int_type));
if (key->compute_sample_id) {
- fs_reg t1 = vgrf(glsl_type::int_type);
- fs_reg t2 = vgrf(glsl_type::int_type);
- t2.type = BRW_REGISTER_TYPE_W;
+ fs_reg t1(GRF, alloc.allocate(1), BRW_REGISTER_TYPE_D);
+ t1.set_smear(0);
+ fs_reg t2(GRF, alloc.allocate(1), BRW_REGISTER_TYPE_W);
/* The PS will be run in MSDISPMODE_PERSAMPLE. For example with
* 8x multisampling, subspan 0 will represent sample N (where N
@@ -1305,13 +1305,13 @@ fs_visitor::emit_sampleid_setup()
* are sample 1 of subspan 0; the third group is sample 0 of
* subspan 1, and finally sample 1 of subspan 1.
*/
- abld.exec_all()
+ abld.exec_all().group(1, 0)
.AND(t1, fs_reg(retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_D)),
fs_reg(0xc0));
- abld.exec_all().SHR(t1, t1, fs_reg(5));
+ abld.exec_all().group(1, 0).SHR(t1, t1, fs_reg(5));
/* This works for both SIMD8 and SIMD16 */
- abld.exec_all()
+ abld.exec_all().group(4, 0)
.MOV(t2, brw_imm_v(key->persample_2x ? 0x1010 : 0x3210));
/* This special instruction takes care of setting vstride=1,