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aco: skip unused channels at the start when fetching vertices

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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@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3086>
This commit is contained in:
Rhys Perry 2019-12-13 13:23:27 +00:00
parent 525b107347
commit d9e357e35b
1 changed files with 10 additions and 1 deletions
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11
src/amd/compiler/aco_instruction_selection.cpp
View file

@ -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);