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_s.comp
+1 -1
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@@ -29,7 +29,7 @@ void main() {
uint qs = data_a[ib].qs[4 * ib32 + l];
const uint8_t sign = data_a[ib].qs[QUANT_K / 8 + 4 * ib32 + l];
qs |= (qh << (8 - 2 * l)) & 0x300;
const uvec2 grid = iq2s_grid[qs & 511];
const uvec2 grid = iq2s_grid[qs];
const u8vec4 grid0 = unpack8(grid.x);
const u8vec4 grid1 = unpack8(grid.y);
data_b[b_idx + 8 * l + 0] = D_TYPE(db[l/2] * grid0.x * ((sign & 1) != 0 ? -1.0 : 1.0));