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Reduced int precision for texture coordinates in q_linear op, to reduce shader register pressure. #6354

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Merged
merged 1 commit into from
Oct 22, 2024
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Reduced int precision for texture coordinates in q_linear op, to reduce shader register pressure. #6354

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14 changes: 8 additions & 6 deletions backends/vulkan/runtime/graph/ops/glsl/q_8w_linear.glsl
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Original file line number Diff line number Diff line change
Expand Up @@ -89,13 +89,15 @@ void main() {

#else // USING_TEXTURE

#extension GL_EXT_shader_explicit_arithmetic_types_int16 : require

VEC4_T q_8w_linear(const ivec3 out_pos, const int K) {
ivec3 mat1_pos = ivec3(0, out_pos.yz);
ivec3 qmat2_pos = ivec3(0, out_pos.x * 4, 0);
u16vec3 mat1_pos = u16vec3(0, out_pos.yz);
u16vec3 qmat2_pos = u16vec3(0, out_pos.x * 4, 0);

VEC4_T outtex = VEC4_T(0);

const ivec3 scales_pos = ivec3(out_pos.x, 0, 0);
const u16vec3 scales_pos = u16vec3(out_pos.x, 0, 0);
const VEC4_T scales = load_texel(t_scales, scales_pos);

for (int i = 0; i < K; i += 4) {
Expand All @@ -104,11 +106,11 @@ VEC4_T q_8w_linear(const ivec3 out_pos, const int K) {
const VEC4_T sums = VEC4_T(
dot(mat1_tex, load_texel(t_qmat2, qmat2_pos) * scales.x),
dot(mat1_tex,
load_texel(t_qmat2, qmat2_pos + ivec3(0, 1, 0)) * scales.y),
load_texel(t_qmat2, qmat2_pos + u16vec3(0, 1, 0)) * scales.y),
dot(mat1_tex,
load_texel(t_qmat2, qmat2_pos + ivec3(0, 2, 0)) * scales.z),
load_texel(t_qmat2, qmat2_pos + u16vec3(0, 2, 0)) * scales.z),
dot(mat1_tex,
load_texel(t_qmat2, qmat2_pos + ivec3(0, 3, 0)) * scales.w));
load_texel(t_qmat2, qmat2_pos + u16vec3(0, 3, 0)) * scales.w));

outtex += sums;

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