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linear for num_partition num values upper boundset

This commit is contained in:
lizzie 2026-01-29 22:33:49 +00:00 committed by crueter
parent d7e3fd7fe8
commit 71d0b4f79b
1 changed files with 6 additions and 10 deletions
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16
src/video_core/host_shaders/astc_decoder.comp
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@ -403,10 +403,9 @@ void DecodeIntegerSequence(uint max_range, uint num_values) {
}
void DecodeColorValues(uvec4 modes, uint num_partitions, uint color_data_bits, out uint color_values[32]) {
uint num_values = 0;
for (uint i = 0; i < num_partitions; i++) {
num_values += ((modes[i] >> 2) + 1) << 1;
}
// TODO: modes[] zero on invalid, so less ops
const uvec4 num_values_tmp = (((modes >> 2) + 1) << 1) & ((uvec4(0, 1, 2, 3) - num_partitions) >> 8);
uint num_values = num_values_tmp.x + num_values_tmp.y + num_values_tmp.z + num_values_tmp.w;
// Find the largest encoding that's within color_data_bits
// TODO(ameerj): profile with binary search
int range = 0;
@ -416,12 +415,9 @@ void DecodeColorValues(uvec4 modes, uint num_partitions, uint color_data_bits, o
break;
}
}
const uint upper_bound = num_values;
DecodeIntegerSequence(range - 1, num_values);
uint out_index = 0;
for (int i = 0; i < result_index; ++i) {
if (out_index >= num_values) {
break;
}
for (int i = 0; i < upper_bound; ++i) {
const EncodingData val = GetEncodingFromVector(i);
const uint encoding = Encoding(val);
const uint bitlen = NumBits(val);
@ -507,7 +503,7 @@ void DecodeColorValues(uvec4 modes, uint num_partitions, uint color_data_bits, o
uint unq = D * C + B;
unq = unq ^ A;
unq = (A & 0x80) | (unq >> 2);
color_values[++out_index] = encoding == JUST_BITS
color_values[i + 1] = encoding == JUST_BITS
? FastReplicateTo8(bitval, bitlen)
: unq;
}