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llama.cpp/ggml-sycl/dequantize.hpp
Meng, Hengyu 623494a478 [SYCL] refactor (#6408) 
* seperate lower precision GEMM from the main files

* fix workgroup size hardcode
2024-06-19 09:11:51 +08:00

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//
// MIT license
// Copyright (C) 2024 Intel Corporation
// SPDX-License-Identifier: MIT
//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
#ifndef GGML_SYCL_DEQUANTIZE_HPP
#define GGML_SYCL_DEQUANTIZE_HPP
#include "common.hpp"
typedef void (*dequantize_kernel_t)(const void * vx, const int ib, const int iqs, dfloat2 & v);
static __dpct_inline__ void dequantize_q4_0(const void *vx, const int ib,
const int iqs, dfloat2 &v) {
const block_q4_0 * x = (const block_q4_0 *) vx;
const dfloat d = x[ib].d;
const int vui = x[ib].qs[iqs];
v.x() = vui & 0xF;
v.y() = vui >> 4;
#ifdef GGML_SYCL_F16
// v = v - {8.0f, 8.0f};
// v = v * {d, d};
v.s0() = (v.s0() - 8.0f) * d;
v.s1() = (v.s1() - 8.0f) * d;
#else
v.x() = (v.x() - 8.0f) * d;
v.y() = (v.y() - 8.0f) * d;
#endif // GGML_SYCL_F16
}
static __dpct_inline__ void dequantize_q4_1(const void *vx, const int ib,
const int iqs, dfloat2 &v) {
const block_q4_1 * x = (const block_q4_1 *) vx;
const dfloat d = x[ib].dm[0];
const dfloat m = x[ib].dm[1];
const int vui = x[ib].qs[iqs];
v.x() = vui & 0xF;
v.y() = vui >> 4;
#ifdef GGML_SYCL_F16
// v = v * {d, d};
// v = v + {m, m};
v.s0() = (v.s0() * d) + m;
v.s1() = (v.s1() * d) + m;
#else
v.x() = (v.x() * d) + m;
v.y() = (v.y() * d) + m;
#endif // GGML_SYCL_F16
}
static __dpct_inline__ void dequantize_q5_0(const void *vx, const int ib,
const int iqs, dfloat2 &v) {
const block_q5_0 * x = (const block_q5_0 *) vx;
const dfloat d = x[ib].d;
uint32_t qh;
memcpy(&qh, x[ib].qh, sizeof(qh));
const int xh_0 = ((qh >> (iqs + 0)) << 4) & 0x10;
const int xh_1 = ((qh >> (iqs + 12)) ) & 0x10;
v.x() = ((x[ib].qs[iqs] & 0xf) | xh_0);
v.y() = ((x[ib].qs[iqs] >> 4) | xh_1);
#ifdef GGML_SYCL_F16
// v = v - {16.0f, 16.0f};
// v = v * {d, d};
v.s0() = (v.s0() - 16.0f) * d;
v.s1() = (v.s1() - 16.0f) * d;
#else
v.x() = (v.x() - 16.0f) * d;
v.y() = (v.y() - 16.0f) * d;
#endif // GGML_SYCL_F16
}
static __dpct_inline__ void dequantize_q5_1(const void *vx, const int ib,
const int iqs, dfloat2 &v) {
const block_q5_1 * x = (const block_q5_1 *) vx;
const dfloat d = x[ib].dm[0];
const dfloat m = x[ib].dm[1];
uint32_t qh;
memcpy(&qh, x[ib].qh, sizeof(qh));
const int xh_0 = ((qh >> (iqs + 0)) << 4) & 0x10;
const int xh_1 = ((qh >> (iqs + 12)) ) & 0x10;
v.x() = ((x[ib].qs[iqs] & 0xf) | xh_0);
v.y() = ((x[ib].qs[iqs] >> 4) | xh_1);
#ifdef GGML_SYCL_F16
// v = v * {d, d};
// v = v + {m, m};
v.s0() = (v.s0() * d) + m;
v.s1() = (v.s1() * d) + m;
#else
v.x() = (v.x() * d) + m;
v.y() = (v.y() * d) + m;
#endif // GGML_SYCL_F16
}
static __dpct_inline__ void dequantize_q8_0(const void *vx, const int ib,
const int iqs, dfloat2 &v) {
const block_q8_0 * x = (const block_q8_0 *) vx;
const dfloat d = x[ib].d;
v.x() = x[ib].qs[iqs + 0];
v.y() = x[ib].qs[iqs + 1];
#ifdef GGML_SYCL_F16
// v = v * {d, d};
v.s0() *= d;
v.s1() *= d;
#else
v.x() *= d;
v.y() *= d;
#endif // GGML_SYCL_F16
}
template<typename dst_t>
static void dequantize_block_q4_0(const void * __restrict__ vx, dst_t * __restrict__ yy, int nb32,
const sycl::nd_item<3> &item_ct1) {
const int i = item_ct1.get_group(2);
// assume 32 threads
const int tid = item_ct1.get_local_id(2);
const int il = tid/8;
const int ir = tid%8;
const int ib = 8*i + ir;
if (ib >= nb32) {
return;
}
dst_t * y = yy + 256*i + 32*ir + 4*il;
const block_q4_0 * x = (const block_q4_0 *)vx + ib;
const float d = sycl::vec<sycl::half, 1>(x->d)
.convert<float, sycl::rounding_mode::automatic>()[0];
const float dm = -8*d;
const uint8_t * q = x->qs + 4*il;
for (int l = 0; l < 4; ++l) {
y[l+ 0] = d * (q[l] & 0xF) + dm;
y[l+16] = d * (q[l] >> 4) + dm;
}
}
template<typename dst_t>
static void dequantize_block_q4_1(const void * __restrict__ vx, dst_t * __restrict__ yy, int nb32,
const sycl::nd_item<3> &item_ct1) {
const int i = item_ct1.get_group(2);
// assume 32 threads
const int tid = item_ct1.get_local_id(2);
const int il = tid/8;
const int ir = tid%8;
const int ib = 8*i + ir;
if (ib >= nb32) {
return;
}
dst_t * y = yy + 256*i + 32*ir + 4*il;
const block_q4_1 * x = (const block_q4_1 *)vx + ib;
const sycl::float2 d =
x->dm.convert<float, sycl::rounding_mode::automatic>();
const uint8_t * q = x->qs + 4*il;
for (int l = 0; l < 4; ++l) {
y[l + 0] = d.x() * (q[l] & 0xF) + d.y();
y[l + 16] = d.x() * (q[l] >> 4) + d.y();
}
}
//================================== k-quants
template<typename dst_t>
static void dequantize_block_q2_K(const void * __restrict__ vx, dst_t * __restrict__ yy,
const sycl::nd_item<3> &item_ct1) {
const int i = item_ct1.get_group(2);
const block_q2_K * x = (const block_q2_K *) vx;
const int tid = item_ct1.get_local_id(2);
#if QK_K == 256
const int n = tid/32;
const int l = tid - 32*n;
const int is = 8*n + l/16;
const uint8_t q = x[i].qs[32*n + l];
dst_t * y = yy + i*QK_K + 128*n;
float dall = x[i].dm[0];
float dmin = x[i].dm[1];
y[l+ 0] = dall * (x[i].scales[is+0] & 0xF) * ((q >> 0) & 3) - dmin * (x[i].scales[is+0] >> 4);
y[l+32] = dall * (x[i].scales[is+2] & 0xF) * ((q >> 2) & 3) - dmin * (x[i].scales[is+2] >> 4);
y[l+64] = dall * (x[i].scales[is+4] & 0xF) * ((q >> 4) & 3) - dmin * (x[i].scales[is+4] >> 4);
y[l+96] = dall * (x[i].scales[is+6] & 0xF) * ((q >> 6) & 3) - dmin * (x[i].scales[is+6] >> 4);
#else
const int is = tid/16; // 0 or 1
const int il = tid%16; // 0...15
const uint8_t q = x[i].qs[il] >> (2*is);
dst_t * y = yy + i*QK_K + 16*is + il;
float dall = x[i].dm[0];
float dmin = x[i].dm[1];
y[ 0] = dall * (x[i].scales[is+0] & 0xF) * ((q >> 0) & 3) - dmin * (x[i].scales[is+0] >> 4);
y[32] = dall * (x[i].scales[is+2] & 0xF) * ((q >> 4) & 3) - dmin * (x[i].scales[is+2] >> 4);
#endif
}
template<typename dst_t>
static void dequantize_block_q3_K(const void * __restrict__ vx, dst_t * __restrict__ yy,
const sycl::nd_item<3> &item_ct1) {
const int i = item_ct1.get_group(2);
const block_q3_K * x = (const block_q3_K *) vx;
#if QK_K == 256
const int r = item_ct1.get_local_id(2) / 4;
const int tid = r/2;
const int is0 = r%2;
const int l0 = 16 * is0 + 4 * (item_ct1.get_local_id(2) % 4);
const int n = tid / 4;
const int j = tid - 4*n;
uint8_t m = 1 << (4*n + j);
int is = 8*n + 2*j + is0;
int shift = 2*j;
int8_t us = is < 4 ? (x[i].scales[is-0] & 0xF) | (((x[i].scales[is+8] >> 0) & 3) << 4) :
is < 8 ? (x[i].scales[is-0] & 0xF) | (((x[i].scales[is+4] >> 2) & 3) << 4) :
is < 12 ? (x[i].scales[is-8] >> 4) | (((x[i].scales[is+0] >> 4) & 3) << 4) :
(x[i].scales[is-8] >> 4) | (((x[i].scales[is-4] >> 6) & 3) << 4);
float d_all = x[i].d;
float dl = d_all * (us - 32);
dst_t * y = yy + i*QK_K + 128*n + 32*j;
const uint8_t * q = x[i].qs + 32*n;
const uint8_t * hm = x[i].hmask;
for (int l = l0; l < l0+4; ++l) y[l] = dl * ((int8_t)((q[l] >> shift) & 3) - ((hm[l] & m) ? 0 : 4));
#else
const int tid = item_ct1.get_local_id(2);
const int is = tid/16; // 0 or 1
const int il = tid%16; // 0...15
const int im = il/8; // 0...1
const int in = il%8; // 0...7
dst_t * y = yy + i*QK_K + 16*is + il;
const uint8_t q = x[i].qs[il] >> (2*is);
const uint8_t h = x[i].hmask[in] >> (2*is + im);
const float d = (float)x[i].d;
if (is == 0) {
y[ 0] = d * ((x[i].scales[0] & 0xF) - 8) * ((int8_t)((q >> 0) & 3) - ((h >> 0) & 1 ? 0 : 4));
y[32] = d * ((x[i].scales[1] & 0xF) - 8) * ((int8_t)((q >> 4) & 3) - ((h >> 4) & 1 ? 0 : 4));
} else {
y[ 0] = d * ((x[i].scales[0] >> 4) - 8) * ((int8_t)((q >> 0) & 3) - ((h >> 0) & 1 ? 0 : 4));
y[32] = d * ((x[i].scales[1] >> 4) - 8) * ((int8_t)((q >> 4) & 3) - ((h >> 4) & 1 ? 0 : 4));
}
#endif
}
#if QK_K == 256
static inline void get_scale_min_k4(int j, const uint8_t * q, uint8_t & d, uint8_t & m) {
if (j < 4) {
d = q[j] & 63; m = q[j + 4] & 63;
} else {
d = (q[j+4] & 0xF) | ((q[j-4] >> 6) << 4);
m = (q[j+4] >> 4) | ((q[j-0] >> 6) << 4);
}
}
#endif
template<typename dst_t>
static void dequantize_block_q4_K(const void * __restrict__ vx, dst_t * __restrict__ yy,
const sycl::nd_item<3> &item_ct1) {
const block_q4_K * x = (const block_q4_K *) vx;
const int i = item_ct1.get_group(2);
#if QK_K == 256
// assume 32 threads
const int tid = item_ct1.get_local_id(2);
const int il = tid/8;
const int ir = tid%8;
const int is = 2*il;
const int n = 4;
dst_t * y = yy + i*QK_K + 64*il + n*ir;
const float dall = x[i].dm[0];
const float dmin = x[i].dm[1];
const uint8_t * q = x[i].qs + 32*il + n*ir;
uint8_t sc, m;
get_scale_min_k4(is + 0, x[i].scales, sc, m);
const float d1 = dall * sc; const float m1 = dmin * m;
get_scale_min_k4(is + 1, x[i].scales, sc, m);
const float d2 = dall * sc; const float m2 = dmin * m;
for (int l = 0; l < n; ++l) {
y[l + 0] = d1 * (q[l] & 0xF) - m1;
y[l +32] = d2 * (q[l] >> 4) - m2;
}
#else
const int tid = item_ct1.get_local_id(2);
const uint8_t * q = x[i].qs;
dst_t * y = yy + i*QK_K;
const float d = (float)x[i].dm[0];
const float m = (float)x[i].dm[1];
y[tid+ 0] = d * (x[i].scales[0] & 0xF) * (q[tid] & 0xF) - m * (x[i].scales[0] >> 4);
y[tid+32] = d * (x[i].scales[1] & 0xF) * (q[tid] >> 4) - m * (x[i].scales[1] >> 4);
#endif
}
template<typename dst_t>
static void dequantize_block_q5_K(const void * __restrict__ vx, dst_t * __restrict__ yy,
const sycl::nd_item<3> &item_ct1) {
const block_q5_K * x = (const block_q5_K *) vx;
const int i = item_ct1.get_group(2);
#if QK_K == 256
// assume 64 threads - this is very slightly better than the one below
const int tid = item_ct1.get_local_id(2);
const int il = tid/16; // il is in 0...3
const int ir = tid%16; // ir is in 0...15
const int is = 2*il; // is is in 0...6
dst_t * y = yy + i*QK_K + 64*il + 2*ir;
const float dall = x[i].dm[0];
const float dmin = x[i].dm[1];
const uint8_t * ql = x[i].qs + 32*il + 2*ir;
const uint8_t * qh = x[i].qh + 2*ir;
uint8_t sc, m;
get_scale_min_k4(is + 0, x[i].scales, sc, m);
const float d1 = dall * sc; const float m1 = dmin * m;
get_scale_min_k4(is + 1, x[i].scales, sc, m);
const float d2 = dall * sc; const float m2 = dmin * m;
uint8_t hm = 1 << (2*il);
y[ 0] = d1 * ((ql[ 0] & 0xF) + (qh[ 0] & hm ? 16 : 0)) - m1;
y[ 1] = d1 * ((ql[ 1] & 0xF) + (qh[ 1] & hm ? 16 : 0)) - m1;
hm <<= 1;
y[32] = d2 * ((ql[ 0] >> 4) + (qh[ 0] & hm ? 16 : 0)) - m2;
y[33] = d2 * ((ql[ 1] >> 4) + (qh[ 1] & hm ? 16 : 0)) - m2;
#else
const int tid = item_ct1.get_local_id(2);
const uint8_t q = x[i].qs[tid];
const int im = tid/8; // 0...3
const int in = tid%8; // 0...7
const int is = tid/16; // 0 or 1
const uint8_t h = x[i].qh[in] >> im;
const float d = x[i].d;
dst_t * y = yy + i*QK_K + tid;
y[ 0] = d * x[i].scales[is+0] * ((q & 0xF) - ((h >> 0) & 1 ? 0 : 16));
y[32] = d * x[i].scales[is+2] * ((q >> 4) - ((h >> 4) & 1 ? 0 : 16));
#endif
}
template<typename dst_t>
static void dequantize_block_q6_K(const void * __restrict__ vx, dst_t * __restrict__ yy,
const sycl::nd_item<3> &item_ct1) {
const block_q6_K * x = (const block_q6_K *) vx;
const int i = item_ct1.get_group(2);
#if QK_K == 256
// assume 64 threads - this is very slightly better than the one below
const int tid = item_ct1.get_local_id(2);
const int ip = tid/32; // ip is 0 or 1
const int il = tid - 32*ip; // 0...32
const int is = 8*ip + il/16;
dst_t * y = yy + i*QK_K + 128*ip + il;
const float d = x[i].d;
const uint8_t * ql = x[i].ql + 64*ip + il;
const uint8_t qh = x[i].qh[32*ip + il];
const int8_t * sc = x[i].scales + is;
y[ 0] = d * sc[0] * ((int8_t)((ql[ 0] & 0xF) | (((qh >> 0) & 3) << 4)) - 32);
y[32] = d * sc[2] * ((int8_t)((ql[32] & 0xF) | (((qh >> 2) & 3) << 4)) - 32);
y[64] = d * sc[4] * ((int8_t)((ql[ 0] >> 4) | (((qh >> 4) & 3) << 4)) - 32);
y[96] = d * sc[6] * ((int8_t)((ql[32] >> 4) | (((qh >> 6) & 3) << 4)) - 32);
#else
// assume 32 threads
const int tid = item_ct1.get_local_id(2);
const int ip = tid/16; // 0 or 1
const int il = tid - 16*ip; // 0...15
dst_t * y = yy + i*QK_K + 16*ip + il;
const float d = x[i].d;
const uint8_t ql = x[i].ql[16*ip + il];
const uint8_t qh = x[i].qh[il] >> (2*ip);
const int8_t * sc = x[i].scales;
y[ 0] = d * sc[ip+0] * ((int8_t)((ql & 0xF) | (((qh >> 0) & 3) << 4)) - 32);
y[32] = d * sc[ip+2] * ((int8_t)((ql >> 4) | (((qh >> 4) & 3) << 4)) - 32);
#endif
}
template<typename dst_t>
static void dequantize_block_iq2_xxs(const void * __restrict__ vx, dst_t * __restrict__ yy,
const sycl::nd_item<3> &item_ct1,
const uint64_t *iq2xxs_grid_ptr,
const uint8_t *ksigns_iq2xs_ptr,
const uint8_t *kmask_iq2xs_ptr) {
const int i = item_ct1.get_group(2);
const block_iq2_xxs * x = (const block_iq2_xxs *) vx;
const int tid = item_ct1.get_local_id(2);
#if QK_K == 256
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 8*il;
const uint16_t * q2 = x[i].qs + 4*ib;
const uint8_t * aux8 = (const uint8_t *)q2;
const uint8_t * grid = (const uint8_t *)(iq2xxs_grid_ptr + aux8[il]);
const uint32_t aux32 = q2[2] | (q2[3] << 16);
const float d = (float)x[i].d * (0.5f + (aux32 >> 28)) * 0.25f;
const uint8_t signs = ksigns_iq2xs_ptr[(aux32 >> 7*il) & 127];
for (int j = 0; j < 8; ++j) y[j] = d * grid[j] * (signs & kmask_iq2xs_ptr[j] ? -1.f : 1.f);
#else
assert(false);
#endif
}
template<typename dst_t>
static void dequantize_block_iq2_xs(const void * __restrict__ vx, dst_t * __restrict__ yy,
const sycl::nd_item<3> &item_ct1,
const uint64_t *iq2xs_grid,
const uint8_t *ksigns_iq2xs,
const uint8_t *kmask_iq2xs) {
const int i = item_ct1.get_group(2);
const block_iq2_xs * x = (const block_iq2_xs *) vx;
const int tid = item_ct1.get_local_id(2);
#if QK_K == 256
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 8*il;
const uint16_t * q2 = x[i].qs + 4*ib;
const uint8_t * grid = (const uint8_t *)(iq2xs_grid + (q2[il] & 511));
const float d = (float)x[i].d * (0.5f + ((x[i].scales[ib] >> 4*(il/2)) & 0xf)) * 0.25f;
const uint8_t signs = ksigns_iq2xs[q2[il] >> 9];
for (int j = 0; j < 8; ++j) y[j] = d * grid[j] * (signs & kmask_iq2xs[j] ? -1.f : 1.f);
#else
assert(false);
#endif
}
template <typename dst_t>
__dpct_inline__ static void
dequantize_block_iq2_s(const void *__restrict__ vx, dst_t *__restrict__ yy,
const sycl::nd_item<3> &item_ct1) {
const int i = item_ct1.get_group(2);
const block_iq2_s * x = (const block_iq2_s *) vx;
const int tid = item_ct1.get_local_id(2);
#if QK_K == 256
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 8*il;
const uint8_t * grid = (const uint8_t *)(iq2s_grid + (x[i].qs[4*ib+il] | ((x[i].qh[ib] << (8-2*il)) & 0x300)));
const float d = (float)x[i].d * (0.5f + ((x[i].scales[ib] >> 4*(il/2)) & 0xf)) * 0.25f;
const uint8_t signs = x[i].qs[QK_K/8+4*ib+il];
#pragma unroll
for (int j = 0; j < 8; ++j)
y[j] = d * grid[j] * (signs & kmask_iq2xs[j] ? -1.f : 1.f);
#else
assert(false);
#endif
}
template<typename dst_t>
static void dequantize_block_iq3_xxs(const void * __restrict__ vx, dst_t * __restrict__ yy,
const sycl::nd_item<3> &item_ct1,
const uint32_t *iq3xxs_grid,
const uint8_t *ksigns_iq2xs,
const uint8_t *kmask_iq2xs) {
const int i = item_ct1.get_group(2);
const block_iq3_xxs * x = (const block_iq3_xxs *) vx;
const int tid = item_ct1.get_local_id(2);
#if QK_K == 256
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 8*il;
const uint8_t * q3 = x[i].qs + 8*ib;
const uint16_t * gas = (const uint16_t *)(x[i].qs + QK_K/4) + 2*ib;
const uint8_t * grid1 = (const uint8_t *)(iq3xxs_grid + q3[2*il+0]);
const uint8_t * grid2 = (const uint8_t *)(iq3xxs_grid + q3[2*il+1]);
const uint32_t aux32 = gas[0] | (gas[1] << 16);
const float d = (float)x[i].d * (0.5f + (aux32 >> 28)) * 0.5f;
const uint8_t signs = ksigns_iq2xs[(aux32 >> 7*il) & 127];
for (int j = 0; j < 4; ++j) {
y[j+0] = d * grid1[j] * (signs & kmask_iq2xs[j+0] ? -1.f : 1.f);
y[j+4] = d * grid2[j] * (signs & kmask_iq2xs[j+4] ? -1.f : 1.f);
}
#else
assert(false);
#endif
}
template <typename dst_t>
__dpct_inline__ static void
dequantize_block_iq3_s(const void *__restrict__ vx, dst_t *__restrict__ yy,
const sycl::nd_item<3> &item_ct1,
const uint8_t *kmask_iq2xs, const uint32_t *iq3s_grid) {
const int i = item_ct1.get_group(2);
const block_iq3_s * x = (const block_iq3_s *) vx;
const int tid = item_ct1.get_local_id(2);
#if QK_K == 256
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 8*il;
const uint8_t * qs = x[i].qs + 8*ib;
const uint8_t * grid1 = (const uint8_t *)(iq3s_grid + (qs[2*il+0] | ((x[i].qh[ib] << (8-2*il)) & 256)));
const uint8_t * grid2 = (const uint8_t *)(iq3s_grid + (qs[2*il+1] | ((x[i].qh[ib] << (7-2*il)) & 256)));
const float d = (float)x[i].d * (1 + 2*((x[i].scales[ib/2] >> 4*(ib%2)) & 0xf));
const uint8_t signs = x[i].signs[4*ib + il];
#pragma unroll
for (int j = 0; j < 4; ++j) {
y[j+0] = d * grid1[j] * (signs & kmask_iq2xs[j+0] ? -1.f : 1.f);
y[j+4] = d * grid2[j] * (signs & kmask_iq2xs[j+4] ? -1.f : 1.f);
}
#else
assert(false);
#endif
}
template <typename dst_t>
__dpct_inline__ static void
dequantize_block_iq1_s(const void *__restrict__ vx, dst_t *__restrict__ yy,
const sycl::nd_item<3> &item_ct1,
const uint32_t *iq1s_grid_gpu) {
const int i = item_ct1.get_group(2);
const block_iq1_s * x = (const block_iq1_s *) vx;
const int tid = item_ct1.get_local_id(2);
#if QK_K == 256
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 8*il;
const float delta = x[i].qh[ib] & 0x8000 ? -1 - IQ1S_DELTA : -1 + IQ1S_DELTA;
const float d = (float)x[i].d * (2*((x[i].qh[ib] >> 12) & 7) + 1);
uint32_t grid32[2]; const int8_t * q = (const int8_t *)grid32;
grid32[0] = iq1s_grid_gpu[x[i].qs[4*ib+il] | (((x[i].qh[ib] >> 3*il) & 7) << 8)];
grid32[1] = (grid32[0] >> 4) & 0x0f0f0f0f;
grid32[0] &= 0x0f0f0f0f;
#pragma unroll
for (int j = 0; j < 8; ++j) {
y[j] = d * (q[j] + delta);
}
#else
assert(false);
#endif
}
template <typename dst_t>
__dpct_inline__ static void
dequantize_block_iq1_m(const void *__restrict__ vx, dst_t *__restrict__ yy,
const sycl::nd_item<3> &item_ct1,
const uint32_t *iq1s_grid_gpu) {
const int i = item_ct1.get_group(2);
const block_iq1_m * x = (const block_iq1_m *) vx;
const int tid = item_ct1.get_local_id(2);
#if QK_K == 256
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 8*il;
const uint16_t * sc = (const uint16_t *)x[i].scales;
iq1m_scale_t scale;
scale.u16 = (sc[0] >> 12) | ((sc[1] >> 8) & 0x00f0) | ((sc[2] >> 4) & 0x0f00) | (sc[3] & 0xf000);
const int ib16 = 2*ib + il/2; // sc[ib16/4] >> 3*(ib16%4) -> sc[ib/2] >> 3*((2*ib+il/2)%4);
const float d = (float)scale.f16 * (2*((sc[ib16/4] >> 3*(ib16%4)) & 0x7) + 1);
const float delta = x[i].qh[2*ib+il/2] & (0x08 << 4*(il%2)) ? -1 - IQ1M_DELTA : -1 + IQ1M_DELTA;
uint32_t grid32[2]; const int8_t * q = (const int8_t *)grid32;
grid32[0] = iq1s_grid_gpu[x[i].qs[4*ib+il] | (((x[i].qh[2*ib+il/2] >> 4*(il%2)) & 7) << 8)];
grid32[1] = (grid32[0] >> 4) & 0x0f0f0f0f;
grid32[0] &= 0x0f0f0f0f;
#pragma unroll
for (int j = 0; j < 8; ++j) {
y[j] = d * (q[j] + delta);
}
#else
assert(false);
#endif
}
template <typename dst_t>
__dpct_inline__ static void
dequantize_block_iq4_nl(const void *__restrict__ vx, dst_t *__restrict__ yy,
const sycl::nd_item<3> &item_ct1) {
const int i = item_ct1.get_group(2);
const block_iq4_nl * x = (const block_iq4_nl *) vx + i*(QK_K/QK4_NL);
const int tid = item_ct1.get_local_id(2);
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 4*il;
const uint8_t * q4 = x[ib].qs + 4*il;
const float d = (float)x[ib].d;
#pragma unroll
for (int j = 0; j < 4; ++j) {
y[j+ 0] = d * kvalues_iq4nl[q4[j] & 0xf];
y[j+16] = d * kvalues_iq4nl[q4[j] >> 4];
}
}
template <typename dst_t>
__dpct_inline__ static void
dequantize_block_iq4_xs(const void *__restrict__ vx, dst_t *__restrict__ yy,
const sycl::nd_item<3> &item_ct1) {
const int i = item_ct1.get_group(2);
const block_iq4_xs * x = (const block_iq4_xs *)vx;
const int tid = item_ct1.get_local_id(2);
const int il = tid/8; // 0...3
const int ib = tid%8; // 0...7
dst_t * y = yy + i*QK_K + 32*ib + 4*il;
const uint8_t * q4 = x[i].qs + 16*ib + 4*il;
const float d = (float)x[i].d * ((((x[i].scales_l[ib/2] >> 4*(ib%2)) & 0xf) | (((x[i].scales_h >> 2*ib) & 3) << 4)) - 32);
#pragma unroll
for (int j = 0; j < 4; ++j) {
y[j+ 0] = d * kvalues_iq4nl[q4[j] & 0xf];
y[j+16] = d * kvalues_iq4nl[q4[j] >> 4];
}
}
#endif // GGML_SYCL_DEQUANTIZE_HPP
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