Mesa (master): aco: skip unused channels at the start when fetching vertices
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Tue Jan 28 12:07:56 UTC 2020
Module: Mesa
Branch: master
Commit: d9e357e35ba5364dd414684df7dd565adfe01592
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=d9e357e35ba5364dd414684df7dd565adfe01592
Author: Rhys Perry <pendingchaos02 at gmail.com>
Date: Fri Dec 13 13:23:27 2019 +0000
aco: skip unused channels at the start when fetching vertices
pipeline-db (Vega):
Totals from affected shaders:
SGPRS: 161320 -> 161224 (-0.06 %)
VGPRS: 153968 -> 149408 (-2.96 %)
Spilled SGPRs: 0 -> 0 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 4331496 -> 4331308 (-0.00 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Max Waves: 27814 -> 28594 (2.80 %)
pipeline-db (Navi):
Totals from affected shaders:
SGPRS: 161504 -> 161408 (-0.06 %)
VGPRS: 153836 -> 149440 (-2.86 %)
Spilled SGPRs: 0 -> 0 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 4327572 -> 4327604 (0.00 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Max Waves: 27837 -> 28618 (2.81 %)
Signed-off-by: Rhys Perry <pendingchaos02 at gmail.com>
Reviewed-by: Daniel Schürmann <daniel at schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3086>
---
src/amd/compiler/aco_instruction_selection.cpp | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/src/amd/compiler/aco_instruction_selection.cpp b/src/amd/compiler/aco_instruction_selection.cpp
index 11f7805b56d..0847d5b6ca8 100644
--- a/src/amd/compiler/aco_instruction_selection.cpp
+++ b/src/amd/compiler/aco_instruction_selection.cpp
@@ -3214,6 +3214,15 @@ void visit_load_input(isel_context *ctx, nir_intrinsic_instr *instr)
unsigned channel_start = 0;
bool direct_fetch = false;
+ /* skip unused channels at the start */
+ if (vtx_info->chan_byte_size && !post_shuffle) {
+ channel_start = ffs(mask) - 1;
+ for (unsigned i = 0; i < channel_start; i++)
+ channels[i] = Temp(0, s1);
+ } else if (vtx_info->chan_byte_size && post_shuffle && !(mask & 0x8)) {
+ num_channels = 3 - (ffs(mask) - 1);
+ }
+
/* load channels */
while (channel_start < num_channels) {
unsigned fetch_size = num_channels - channel_start;
@@ -3290,7 +3299,7 @@ void visit_load_input(isel_context *ctx, nir_intrinsic_instr *instr)
unsigned num_temp = 0;
for (unsigned i = 0; i < dst.size(); i++) {
unsigned idx = i + component;
- if (idx < num_channels && channels[swizzle[idx]].id()) {
+ if (swizzle[idx] < num_channels && channels[swizzle[idx]].id()) {
Temp channel = channels[swizzle[idx]];
if (idx == 3 && alpha_adjust != RADV_ALPHA_ADJUST_NONE)
channel = adjust_vertex_fetch_alpha(ctx, alpha_adjust, channel);
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