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fix dequant_funcs.comp #1317

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fix dequant_funcs.comp #1317

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8 changes: 6 additions & 2 deletions src/ggml-vulkan/vulkan-shaders/dequant_funcs.comp
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Original file line number Diff line number Diff line change
Expand Up @@ -442,8 +442,12 @@ vec2 get_dm(uint ib, uint a_offset) {

#if defined(DATA_A_IQ1_M)
vec2 get_dm(uint ib, uint a_offset) {
const uint16_t[4] scales = data_a[a_offset + ib].scales;
const u16vec4 s = u16vec4(scales[0], scales[1], scales[2], scales[3]) >> 12;
u16vec4 s = u16vec4(
data_a[a_offset + ib].scales[0],
data_a[a_offset + ib].scales[1],
data_a[a_offset + ib].scales[2],
data_a[a_offset + ib].scales[3]
) >> 12;
const float d = float(unpackHalf2x16(s.x | (s.y << 4) | (s.z << 8) | (s.w << 12)).x);
return vec2(d, 0);
}
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