diff options
| author | Kenneth Graunke <[email protected]> | 2015-12-27 16:14:11 -0800 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2016-01-02 18:46:16 -0800 |
| commit | b022150d70a1cfdda2007fa16b04c601eef45d6f (patch) | |
| tree | 9553bfe2d64f949819496c8bd1d656afa47a93d4 /src/mesa/drivers/dri/i965 | |
| parent | 53a9b6223f4ebf66e8892e04ffe47eb5586eda5c (diff) | |
i965: Use LOAD_PAYLOAD for SIMD8 TES input loads, not MOV.
We need a MOV to replicate g0.0<0,1,0> to all 8 channels. Since the
message payload is a single register, MOV seemed more sensible than
LOAD_PAYLOAD. However, MOV cannot be CSE'd, while LOAD_PAYLOAD can.
All input loads can use the same header - we don't need to re-expand
g0 every time. CSE accomplishes this, saving instructions.
shader-db statistics for files containing tessellation shaders:
total instructions in shared programs: 186923 -> 184358 (-1.37%)
instructions in affected programs: 30536 -> 27971 (-8.40%)
helped: 226
HURT: 0
total cycles in shared programs: 1009850 -> 1005356 (-0.45%)
cycles in affected programs: 168206 -> 163712 (-2.67%)
helped: 226
HURT: 0
Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Diffstat (limited to 'src/mesa/drivers/dri/i965')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp index 827dbeeb7b6..788315f6c52 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp @@ -1850,8 +1850,11 @@ fs_visitor::nir_emit_tes_intrinsic(const fs_builder &bld, fs_inst *inst; if (indirect_offset.file == BAD_FILE) { /* Replicate the patch handle to all enabled channels */ + const fs_reg srcs[] = { + retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD) + }; fs_reg patch_handle = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); - bld.MOV(patch_handle, retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD)); + bld.LOAD_PAYLOAD(patch_handle, srcs, ARRAY_SIZE(srcs), 0); inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, dest, patch_handle); inst->mlen = 1; |