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Merged
merged 12 commits into from
Oct 29, 2025
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Merged

Vulkan MMQ Integer Dot Refactor and K-Quant support #16536

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2d6efa4
vulkan: add mmq q2_k integer dot support
0cc4m Sep 28, 2025
c4711d8
Refactor mmq caching
0cc4m Oct 12, 2025
0775df7
Reduce mmq register use
0cc4m Oct 19, 2025
ded8089
Load 4 quant blocks into shared memory in one step
0cc4m Oct 25, 2025
e978f66
Pack q2_k blocks into caches of 32
0cc4m Oct 25, 2025
1309d7d
Use 32-bit accumulators for integer dot matmul
0cc4m Oct 27, 2025
5148d4a
Add q4_k mmq
0cc4m Oct 27, 2025
6d83a8d
Add q3_k mmq
0cc4m Oct 28, 2025
c9382df
Add q5_k mmq
0cc4m Oct 28, 2025
84cb48c
Add q6_k mmq
0cc4m Oct 28, 2025
40d75d9
Add mxfp4 mmq, enable MMQ MUL_MAT_ID
0cc4m Oct 28, 2025
3b5a6f8
Fix mmv dm loads
0cc4m Oct 29, 2025
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165 changes: 140 additions & 25 deletions ggml/src/ggml-vulkan/ggml-vulkan.cpp
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10 changes: 5 additions & 5 deletions ggml/src/ggml-vulkan/vulkan-shaders/dequant_funcs.glsl
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Expand Up @@ -437,7 +437,7 @@ vec4 dequantize4(uint ib, uint iqs, uint a_offset) {
#if defined(DATA_A_MXFP4)
vec2 dequantize(uint ib, uint iqs, uint a_offset) {
const uint vui = uint(data_a[a_offset + ib].qs[iqs]);
return vec2(kvalues_mxfp4[vui & 0xF], kvalues_mxfp4[vui >> 4]);
return vec2(kvalues_mxfp4[vui & 0xF], kvalues_mxfp4[vui >> 4]) * 0.5;
}
vec4 dequantize4(uint ib, uint iqs, uint a_offset) {
vec2 v0 = dequantize(ib, iqs, a_offset);
Expand Down Expand Up @@ -488,9 +488,9 @@ vec2 dequantize(uint ib, uint iqs, uint a_offset) {

const uvec2 qs = uvec2(data_a[a_offset + ib].qs[qsi], data_a[a_offset + ib].qs[qsi + 1]);
const uint scales = data_a[a_offset + ib].scales[scalesi];
const vec2 d = vec2(data_a[a_offset + ib].d);
const vec2 dm = vec2(data_a[a_offset + ib].dm);

return d.x * float(scales & 0xF) * vec2((qs >> qsshift) & 3) - d.y * float(scales >> 4);
return dm.x * float(scales & 0xF) * vec2((qs >> qsshift) & 3) - dm.y * float(scales >> 4);
}
vec2 get_dm(uint ib, uint a_offset) {
return vec2(1, 0);
Expand Down Expand Up @@ -529,7 +529,7 @@ vec2 dequantize(uint ib, uint iqs, uint a_offset) {
const uint is = 2 * n + b; // 0..7
const uint qsi = n * 32 + (iqs % 16) * 2; // 0,2,4..126

const vec2 loadd = vec2(data_a[a_offset + ib].d);
const vec2 loadd = vec2(data_a[a_offset + ib].dm);

const uint scidx0 = (is < 4) ? is : (is + 4);
const uint scidx1 = (is < 4) ? is : (is - 4);
Expand Down Expand Up @@ -567,7 +567,7 @@ vec2 dequantize(uint ib, uint iqs, uint a_offset) {

const uint8_t hm = uint8_t(1 << (iqs / 16));

const vec2 loadd = vec2(data_a[a_offset + ib].d);
const vec2 loadd = vec2(data_a[a_offset + ib].dm);

const uint scidx0 = (is < 4) ? is : (is + 4);
const uint scidx1 = (is < 4) ? is : (is - 4);
Expand Down
6 changes: 3 additions & 3 deletions ggml/src/ggml-vulkan/vulkan-shaders/dequant_funcs_cm2.glsl
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Expand Up @@ -120,7 +120,7 @@ layout(buffer_reference, std430, buffer_reference_align = 16) buffer decodeBufQ2
float16_t dequantFuncQ2_K(const in decodeBufQ2_K bl, const in uint blockCoords[2], const in uint coordInBlock[2])
{
decodeBufQ2_K_packed16 bl16 = decodeBufQ2_K_packed16(bl);
const f16vec2 d = bl.block.d;
const f16vec2 dm = bl.block.dm;
const uint idx = coordInBlock[1];

const uint scalesi = (idx & 0xF0) >> 4; // 0..15
Expand All @@ -131,7 +131,7 @@ float16_t dequantFuncQ2_K(const in decodeBufQ2_K bl, const in uint blockCoords[2
qs = unpack8(qs)[idx & 1];

const uint scales = bl.block.scales[scalesi];
float16_t ret = d.x * float16_t(scales & 0xF) * float16_t(qs) - d.y * float16_t(scales >> 4);
float16_t ret = dm.x * float16_t(scales & 0xF) * float16_t(qs) - dm.y * float16_t(scales >> 4);
return ret;
}

Expand Down Expand Up @@ -680,7 +680,7 @@ float16_t dequantFuncMXFP4(const in decodeBufMXFP4 bl, const in uint blockCoords
uint32_t qs = bl.block.qs[iqs];
qs >>= shift;
qs &= 0xF;
float16_t ret = float16_t(kvalues_mxfp4[qs] * d);
float16_t ret = float16_t(kvalues_mxfp4[qs] * d * 0.5);
return ret;
}
#endif
Expand Down
4 changes: 2 additions & 2 deletions ggml/src/ggml-vulkan/vulkan-shaders/dequant_mxfp4.comp
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Expand Up @@ -26,7 +26,7 @@ void main() {
const float d = e8m0_to_fp32(data_a[ib].e);

[[unroll]] for (uint l = 0; l < 8; ++l) {
data_b[b_idx + l + 0] = D_TYPE(d * kvalues_mxfp4[data_a[ib].qs[q_idx + l] & 0xF]);
data_b[b_idx + l + 16] = D_TYPE(d * kvalues_mxfp4[data_a[ib].qs[q_idx + l] >> 4]);
data_b[b_idx + l + 0] = D_TYPE(d * 0.5 * float(kvalues_mxfp4[data_a[ib].qs[q_idx + l] & 0xF]));
data_b[b_idx + l + 16] = D_TYPE(d * 0.5 * float(kvalues_mxfp4[data_a[ib].qs[q_idx + l] >> 4]));
}
}
4 changes: 2 additions & 2 deletions ggml/src/ggml-vulkan/vulkan-shaders/dequant_q2_k.comp
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Expand Up @@ -24,8 +24,8 @@ void main() {
const uint ql_idx = 32 * ip + il;
const uint8_t qs = data_a[i].qs[32 * ip + il];

FLOAT_TYPE dall = FLOAT_TYPE(data_a[i].d.x);
FLOAT_TYPE dmin = FLOAT_TYPE(data_a[i].d.y);
FLOAT_TYPE dall = FLOAT_TYPE(data_a[i].dm.x);
FLOAT_TYPE dmin = FLOAT_TYPE(data_a[i].dm.y);
data_b[y_idx + 0] = D_TYPE(dall * FLOAT_TYPE((data_a[i].scales[is+0] & 0xF) * ((qs >> 0) & 3)) - dmin * FLOAT_TYPE(data_a[i].scales[is+0] >> 4));
data_b[y_idx + 32] = D_TYPE(dall * FLOAT_TYPE((data_a[i].scales[is+2] & 0xF) * ((qs >> 2) & 3)) - dmin * FLOAT_TYPE(data_a[i].scales[is+2] >> 4));
data_b[y_idx + 64] = D_TYPE(dall * FLOAT_TYPE((data_a[i].scales[is+4] & 0xF) * ((qs >> 4) & 3)) - dmin * FLOAT_TYPE(data_a[i].scales[is+4] >> 4));
Expand Down
4 changes: 2 additions & 2 deletions ggml/src/ggml-vulkan/vulkan-shaders/dequant_q4_k.comp
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Expand Up @@ -20,8 +20,8 @@ void main() {
const uint is = 2 * il;
const uint n = 4;

const FLOAT_TYPE dall = FLOAT_TYPE(data_a[ib].d.x);
const FLOAT_TYPE dmin = FLOAT_TYPE(data_a[ib].d.y);
const FLOAT_TYPE dall = FLOAT_TYPE(data_a[ib].dm.x);
const FLOAT_TYPE dmin = FLOAT_TYPE(data_a[ib].dm.y);

const uint y_idx = ib * QUANT_K + 64 * il + n * ir;
const uint qs_idx = 32*il + n * ir;
Expand Down
4 changes: 2 additions & 2 deletions ggml/src/ggml-vulkan/vulkan-shaders/dequant_q5_k.comp
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Expand Up @@ -19,8 +19,8 @@ void main() {
const uint ir = tid % 16;
const uint is = 2 * il;

const FLOAT_TYPE dall = FLOAT_TYPE(data_a[ib].d.x);
const FLOAT_TYPE dmin = FLOAT_TYPE(data_a[ib].d.y);
const FLOAT_TYPE dall = FLOAT_TYPE(data_a[ib].dm.x);
const FLOAT_TYPE dmin = FLOAT_TYPE(data_a[ib].dm.y);

const uint y_idx = ib * QUANT_K + 64 * il + 2 * ir;
const uint qs_idx = 32*il + 2 * ir;
Expand Down
6 changes: 2 additions & 4 deletions ggml/src/ggml-vulkan/vulkan-shaders/mul_mat_vec_q2_k.comp
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Expand Up @@ -41,9 +41,7 @@ void calc_superblock(const uint a_offset, const uint b_offset, const uint itid,
const vec4 qs_u32_4 = vec4(unpack8((qs_u32 >> 4) & 0x03030303));
const vec4 qs_u32_6 = vec4(unpack8((qs_u32 >> 6) & 0x03030303));

vec2 d = vec2(data_a[ib0 + i].d);
const FLOAT_TYPE dall = FLOAT_TYPE(d.x);
const FLOAT_TYPE dmin = FLOAT_TYPE(d.y);
const FLOAT_TYPE_VEC2 dm = vec2(data_a[ib0 + i].dm);

[[unroll]] for (uint j = 0; j < NUM_COLS; ++j) {
vec2 b0 = vec2(data_b_v2[(j*p.batch_stride_b + b_offset + y_idx) / 2 + 0]);
Expand Down Expand Up @@ -75,7 +73,7 @@ void calc_superblock(const uint a_offset, const uint b_offset, const uint itid,
fma(FLOAT_TYPE(b96[l]), sccache2[csel][ix][6 + 8*v_im],
fma(FLOAT_TYPE(b112[l]), sccache2[csel][ix][7 + 8*v_im], sum2))))))));
}
temp[j][n] = fma(dall, sum1, fma(-dmin, sum2, temp[j][n]));
temp[j][n] = fma(dm.x, sum1, fma(-dm.y, sum2, temp[j][n]));
}
}
}
Expand Down
6 changes: 2 additions & 4 deletions ggml/src/ggml-vulkan/vulkan-shaders/mul_mat_vec_q4_k.comp
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Expand Up @@ -14,9 +14,7 @@ void calc_superblock(const uint a_offset, const uint b_offset, const uint v_im,

[[unroll]] for (uint n = 0; n < num_rows; ++n) {
const uint ib0 = a_offset / QUANT_K + (first_row+n)*num_blocks_per_row;
vec2 d = vec2(data_a[ib0 + i].d);
const FLOAT_TYPE dall = FLOAT_TYPE(d.x);
const FLOAT_TYPE dmin = FLOAT_TYPE(d.y);
const FLOAT_TYPE_VEC2 dm = FLOAT_TYPE_VEC2(data_a[ib0 + i].dm);

const uint32_t scale0_u32 = data_a_packed16[ib0 + i].scales[v_im ];
const uint32_t scale4_u32 = data_a_packed16[ib0 + i].scales[v_im + 2];
Expand Down Expand Up @@ -81,7 +79,7 @@ void calc_superblock(const uint a_offset, const uint b_offset, const uint v_im,
fma(FLOAT_TYPE(by10.y), sc2, fma(FLOAT_TYPE(by132.y), sc3, fma(FLOAT_TYPE(by20.y), sc6, fma(FLOAT_TYPE(by232.y), sc7,
fma(FLOAT_TYPE(by10.z), sc2, fma(FLOAT_TYPE(by132.z), sc3, fma(FLOAT_TYPE(by20.z), sc6, fma(FLOAT_TYPE(by232.z), sc7,
fma(FLOAT_TYPE(by10.w), sc2, fma(FLOAT_TYPE(by132.w), sc3, fma(FLOAT_TYPE(by20.w), sc6, FLOAT_TYPE(by232.w) * sc7)))))))))))))));
temp[j][n] = fma(dall, fma(sx, sc0, fma(sy, sc1, fma(sz, sc4, sw * sc5))), fma(-dmin, smin, temp[j][n]));
temp[j][n] = fma(dm.x, fma(sx, sc0, fma(sy, sc1, fma(sz, sc4, sw * sc5))), fma(-dm.y, smin, temp[j][n]));
}
}
}
Expand Down
6 changes: 2 additions & 4 deletions ggml/src/ggml-vulkan/vulkan-shaders/mul_mat_vec_q5_k.comp
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Expand Up @@ -14,9 +14,7 @@ void calc_superblock(const uint a_offset, const uint b_offset, const uint v_im,

[[unroll]] for (uint n = 0; n < num_rows; ++n) {
const uint ib0 = a_offset / QUANT_K + (first_row+n)*num_blocks_per_row;
vec2 d = vec2(data_a[ib0 + i].d);
const FLOAT_TYPE dall = FLOAT_TYPE(d.x);
const FLOAT_TYPE dmin = FLOAT_TYPE(d.y);
const FLOAT_TYPE_VEC2 dm = FLOAT_TYPE_VEC2(data_a[ib0 + i].dm);

const uint32_t scale0_u32 = data_a_packed16[ib0 + i].scales[v_im ];
const uint32_t scale4_u32 = data_a_packed16[ib0 + i].scales[v_im + 2];
Expand Down Expand Up @@ -113,7 +111,7 @@ void calc_superblock(const uint a_offset, const uint b_offset, const uint v_im,
fma(FLOAT_TYPE(by132.x) + FLOAT_TYPE(by132.y) + FLOAT_TYPE(by148.x) + FLOAT_TYPE(by148.y), sc3,
fma(FLOAT_TYPE(by20.x) + FLOAT_TYPE(by20.y) + FLOAT_TYPE(by216.x) + FLOAT_TYPE(by216.y), sc6,
(FLOAT_TYPE(by232.x) + FLOAT_TYPE(by232.y) + FLOAT_TYPE(by248.x) + FLOAT_TYPE(by248.y)) * sc7)));
temp[j][n] = fma(dall, fma(sx, sc0, fma(sy, sc1, fma(sz, sc4, sw * sc5))), fma(-dmin, smin, temp[j][n]));
temp[j][n] = fma(dm.x, fma(sx, sc0, fma(sy, sc1, fma(sz, sc4, sw * sc5))), fma(-dm.y, smin, temp[j][n]));
}
}
}
Expand Down
72 changes: 1 addition & 71 deletions ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp
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Expand Up @@ -120,81 +120,11 @@ shared FLOAT_TYPE_VEC2 buf_b[BN * SHMEM_STRIDE];

#define NUM_WARPS (BLOCK_SIZE / WARP)

#ifdef MUL_MAT_ID
shared u16vec2 row_ids[BN];
uint _ne1;

#ifdef MUL_MAT_ID_USE_SUBGROUPS
shared uvec4 ballots_sh[NUM_WARPS];

void load_row_ids(uint expert_idx, bool nei0_is_pow2, uint ic) {
_ne1 = 0;
uint num_elements = p.nei1 * p.nei0;
uint nei0shift = findLSB(p.nei0);

uint ids[16];
uint iter = 0;

for (uint j = 0; j < num_elements; j += BLOCK_SIZE) {
// prefetch up to 16 elements
if (iter == 0) {
[[unroll]] for (uint k = 0; k < 16; ++k) {
uint i = j + gl_LocalInvocationIndex + k*BLOCK_SIZE;
bool in_range = i < num_elements;
uint ii1;
if (nei0_is_pow2) {
ii1 = i >> nei0shift;
} else {
ii1 = i / p.nei0;
}
uint ii0 = i - ii1 * p.nei0;
ids[k] = in_range ? data_ids[ii1*p.nbi1 + ii0] : 0;
}
}
uint i = j + gl_LocalInvocationIndex;
bool in_range = i < num_elements;
uint ii1;
if (nei0_is_pow2) {
ii1 = i >> nei0shift;
} else {
ii1 = i / p.nei0;
}
uint ii0 = i - ii1 * p.nei0;
uint id = ids[iter++];
uvec4 ballot = subgroupBallot(in_range && id == expert_idx);

ballots_sh[gl_SubgroupID] = ballot;
barrier();

uint subgroup_base = 0;
uint total = 0;
for (uint k = 0; k < gl_NumSubgroups; ++k) {
if (k == gl_SubgroupID) {
subgroup_base = total;
}
total += subgroupBallotBitCount(ballots_sh[k]);
}
barrier();

uint idx = subgroup_base + subgroupBallotExclusiveBitCount(ballot);
if (in_range && id == expert_idx && _ne1 + idx >= ic * BN && _ne1 + idx < (ic + 1) * BN) {
row_ids[_ne1 + idx - ic * BN] = u16vec2(ii0, ii1);
}
_ne1 += total;
iter &= 15;
if (_ne1 >= (ic + 1) * BN) {
break;
}
}
barrier();
}
#endif // MUL_MAT_ID_USE_SUBGROUPS
#endif // MUL_MAT_ID

#ifdef COOPMAT
shared ACC_TYPE coopmat_stage[TM * TN * NUM_WARPS];
#endif

#include "mul_mm_id_funcs.glsl"
#include "mul_mm_funcs.glsl"

void main() {
Expand Down
14 changes: 7 additions & 7 deletions ggml/src/ggml-vulkan/vulkan-shaders/mul_mm_funcs.glsl
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Expand Up @@ -134,15 +134,15 @@ void load_a_to_shmem(const uint pos_a, const uint row, const uint col, const uin
const uint ib = idx / 128; // 2 values per idx
const uint iqs = idx % 128; // 0..127

const uint qsi = (iqs / 64) * 32 + (iqs % 16) * 2; // 0,2,4..30
const uint qsi = (iqs / 64) * 16 + (iqs % 16); // 0..15
const uint scalesi = iqs / 8; // 0..15
const uint qsshift = ((iqs % 64) / 16) * 2; // 0,2,4,6

const uvec2 qs = uvec2(data_a[ib].qs[qsi], data_a[ib].qs[qsi + 1]);
const uvec2 qs = uvec2(unpack8(data_a_packed16[ib].qs[qsi]));
const uint scales = data_a[ib].scales[scalesi];
const vec2 d = vec2(data_a[ib].d);
const vec2 dm = vec2(data_a[ib].dm);

const vec2 v = d.x * float(scales & 0xF) * vec2((qs >> qsshift) & 3) - d.y * float(scales >> 4);
const vec2 v = dm.x * float(scales & 0xF) * vec2((qs >> qsshift) & 3) - dm.y * float(scales >> 4);

buf_a[buf_idx] = FLOAT_TYPE_VEC2(v.xy);
#elif defined(DATA_A_Q3_K)
Expand Down Expand Up @@ -179,7 +179,7 @@ void load_a_to_shmem(const uint pos_a, const uint row, const uint col, const uin
const uint is = 2 * n + b; // 0..7
const uint qsi = n * 32 + (iqs % 16) * 2; // 0,2,4..126

const vec2 loadd = vec2(data_a[ib].d);
const vec2 loadd = vec2(data_a[ib].dm);

const uint scidx0 = (is < 4) ? is : (is + 4);
const uint scidx1 = (is < 4) ? is : (is - 4);
Expand Down Expand Up @@ -215,7 +215,7 @@ void load_a_to_shmem(const uint pos_a, const uint row, const uint col, const uin

const uint8_t hm = uint8_t(1 << (iqs / 16));

const vec2 loadd = vec2(data_a[ib].d);
const vec2 loadd = vec2(data_a[ib].dm);

const uint scidx0 = (is < 4) ? is : (is + 4);
const uint scidx1 = (is < 4) ? is : (is - 4);
Expand Down Expand Up @@ -468,7 +468,7 @@ void load_a_to_shmem(const uint pos_a, const uint row, const uint col, const uin
const uint ib = idx / 8;
const uint iqs = (idx & 0x07) * 2;

const float d = e8m0_to_fp32(data_a[ib].e);
const float d = e8m0_to_fp32(data_a[ib].e) * 0.5;
const uint vui = uint(data_a[ib].qs[iqs]);
const uint vui2 = uint(data_a[ib].qs[iqs+1]);

Expand Down
70 changes: 70 additions & 0 deletions ggml/src/ggml-vulkan/vulkan-shaders/mul_mm_id_funcs.glsl
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@@ -0,0 +1,70 @@
#ifdef MUL_MAT_ID
shared u16vec2 row_ids[BN];
uint _ne1;

#ifdef MUL_MAT_ID_USE_SUBGROUPS
shared uvec4 ballots_sh[NUM_WARPS];

void load_row_ids(uint expert_idx, bool nei0_is_pow2, uint ic) {
_ne1 = 0;
uint num_elements = p.nei1 * p.nei0;
uint nei0shift = findLSB(p.nei0);

uint ids[16];
uint iter = 0;

for (uint j = 0; j < num_elements; j += BLOCK_SIZE) {
// prefetch up to 16 elements
if (iter == 0) {
[[unroll]] for (uint k = 0; k < 16; ++k) {
uint i = j + gl_LocalInvocationIndex + k*BLOCK_SIZE;
bool in_range = i < num_elements;
uint ii1;
if (nei0_is_pow2) {
ii1 = i >> nei0shift;
} else {
ii1 = i / p.nei0;
}
uint ii0 = i - ii1 * p.nei0;
ids[k] = in_range ? data_ids[ii1*p.nbi1 + ii0] : 0;
}
}
uint i = j + gl_LocalInvocationIndex;
bool in_range = i < num_elements;
uint ii1;
if (nei0_is_pow2) {
ii1 = i >> nei0shift;
} else {
ii1 = i / p.nei0;
}
uint ii0 = i - ii1 * p.nei0;
uint id = ids[iter++];
uvec4 ballot = subgroupBallot(in_range && id == expert_idx);

ballots_sh[gl_SubgroupID] = ballot;
barrier();

uint subgroup_base = 0;
uint total = 0;
for (uint k = 0; k < gl_NumSubgroups; ++k) {
if (k == gl_SubgroupID) {
subgroup_base = total;
}
total += subgroupBallotBitCount(ballots_sh[k]);
}
barrier();

uint idx = subgroup_base + subgroupBallotExclusiveBitCount(ballot);
if (in_range && id == expert_idx && _ne1 + idx >= ic * BN && _ne1 + idx < (ic + 1) * BN) {
row_ids[_ne1 + idx - ic * BN] = u16vec2(ii0, ii1);
}
_ne1 += total;
iter &= 15;
if (_ne1 >= (ic + 1) * BN) {
break;
}
}
barrier();
}
#endif // MUL_MAT_ID_USE_SUBGROUPS
#endif // MUL_MAT_ID
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