Lumpiasty/llama.cpp
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vulkan: fix failing dequant shaders (#15862)

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* vulkan: fix failing dequant shaders

* add missing const
This commit is contained in:
Jeff Bolz
2025-09-13 17:29:43 +02:00
committed by GitHub
parent b9c9c9f789
commit aa0c461efe
4 changed files with 13 additions and 9 deletions
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ggml/src/ggml-vulkan/vulkan-shaders/dequant_iq2_xxs.comp
+2 -1
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@@ -33,7 +33,8 @@ void main() {
[[unroll]] for (uint l = 0; l < 4; ++l) {
const uint sign7 = bitfieldExtract(signscale, 7 * int(l), 7);
const uint sign8 = sign7 | (bitCount(sign7) << 7); // parity bit
const uvec2 grid = iq2xxs_grid[data_a[ib].qs[8 * is + l]];
const uint qs = data_a[ib].qs[8 * is + l];
const uvec2 grid = iq2xxs_grid[qs];
const u8vec4 grid0 = unpack8(grid.x);
const u8vec4 grid1 = unpack8(grid.y);
data_b[b_idx + 8 * l + 0] = D_TYPE(db * grid0.x * ((sign8 & 1) != 0 ? -1.0 : 1.0));