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#version 450
#include "common.comp"
#define SIZE_OF_BLOCK sizeof_block_q6_k
layout(local_size_x_id = 0) in;
layout(local_size_y_id = 1) in;
layout(local_size_z = 1) in;
layout (binding = 0) readonly buffer tensorInA { uint8_t inA[]; };
layout (binding = 1) readonly buffer tensorInB { float inB[]; };
layout (binding = 2) writeonly buffer tensorOut { float out_[]; };
layout (push_constant) uniform parameter {
uint inAOff;
uint inBOff;
uint outOff;
int ne00;
int ne10;
int ne0;
int ne1;
int ne01;
int gqa;
} pcs;
void main() {
const uint8_t kmask1 = uint8_t(0x03);
const uint8_t kmask2 = uint8_t(0x0C);
const uint8_t kmask3 = uint8_t(0x30);
const uint8_t kmask4 = uint8_t(0xC0);
const uint nb = pcs.ne00/QK_K;
const uint r0 = gl_WorkGroupID.x;
const uint r1 = gl_WorkGroupID.y;
const uint r2 = gl_WorkGroupID.z;
const uint row = (r0 * gl_NumSubgroups + gl_SubgroupID);
const uint offset0 = r2/pcs.gqa*(nb*pcs.ne0);
const uint x = row * nb + offset0; // Based from inA without base offset
const uint yy = r1*pcs.ne10 + r2*pcs.ne00*pcs.ne1+pcs.inBOff; // Based from inB
float sumf = 0;
// bits of invocation ID for gl_SubgroupSize=32:
// x x x x x
// 4 3 2 1 0
// ( tid ) ix
// ip ( il )
const uint block_stride = gl_SubgroupSize / 16; // number of blocks each subgroup processes
const uint tid = gl_SubgroupInvocationID/block_stride; // first block_stride groups have tid=0
const uint ix = gl_SubgroupInvocationID%block_stride; // first block is 0..block_stride-1
const uint ip = tid/8; // first or second half of block (0 or 1)
const uint il = tid%8; // each half has 8 parts, one per scale
const uint n = 4; // 4 scales at a time (and 4 sums)
const uint l0 = n*il; // offset into half-block, 0..28
const uint is = 8*ip + l0/16; // 0, 1, 8, 9
const uint y_offset = 128*ip + l0;
const uint q_offset_l = 64*ip + l0;
const uint q_offset_h = 32*ip + l0;
for (uint i = ix; i < nb; i += block_stride) {
const uint baseIndex = (x + i) * SIZE_OF_BLOCK + pcs.inAOff;
const uint qlIndex = q_offset_l;
const uint q2Index = qlIndex + QK_K/8;
const uint qhIndex = q_offset_h;
const uint y = yy + i * QK_K + y_offset;
float sums[4] = {0.0f, 0.0f, 0.0f, 0.0f};
for (uint l = 0; l < n; ++l) {
const uint8_t currentQ1 = inA[baseIndex + qlIndex + l];
const uint8_t currentQ2 = inA[baseIndex + q2Index + l];
const uint8_t currentQh = inA[baseIndex + QK_K/2 + qhIndex + l];
sums[0] += inB[y+l+ 0] * (int8_t((currentQ1 & 0xF) | ((currentQh & kmask1) << 4)) - 32);
sums[1] += inB[y+l+32] * (int8_t((currentQ2 & 0xF) | ((currentQh & kmask2) << 2)) - 32);
sums[2] += inB[y+l+64] * (int8_t((currentQ1 >> 4) | ((currentQh & kmask3) << 0)) - 32);
sums[3] += inB[y+l+96] * (int8_t((currentQ2 >> 4) | ((currentQh & kmask4) >> 2)) - 32);
}
float d = u8BufToFloat16(inA, baseIndex + QK_K/2 + QK_K/4 + QK_K/16);
sumf += d * (sums[0] * int8_t(inA[baseIndex + QK_K/2 + QK_K/4 + is]) + sums[1] * int8_t(inA[baseIndex + QK_K/2 + QK_K/4 + 2 + is]) + sums[2] * int8_t(inA[baseIndex + QK_K/2 + QK_K/4 + 4 + is]) + sums[3] * int8_t(inA[baseIndex + QK_K/2 + QK_K/4 + 6 + is]));
}
const float tot = subgroupAdd(sumf);
if (subgroupElect()) {
out_[r1*pcs.ne0 + r2*pcs.ne0*pcs.ne1 + row + pcs.outOff] = tot;
}
}
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