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llama.cpp
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Merge 05ec473280 into ef83fb8601

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lovedheart 2025-12-17 03:16:29 +08:00 committed by GitHub
parent ef83fb8601 05ec473280
commit 3f6d7432d2
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1 changed files with 42 additions and 24 deletions
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46
ggml/src/ggml-vulkan/vulkan-shaders/mul_mat_vec_iq2_xs.comp
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@ -11,25 +11,43 @@ void calc_superblock(const uint a_offset, const uint b_offset, const uint itid,
const uint y_idx = i * QUANT_K + 16 * itid;
const uint nibble_shift = 4 * (itid & 1);
const uint ib32 = itid / 2; // 0..7
uint ibi = a_offset / QUANT_K + first_row * num_blocks_per_row + i;
// Precompute db multiplication factors
float db_vals[NUM_ROWS];
[[unroll]] for (uint n = 0; n < num_rows; ++n) {
const float d = float(data_a[ibi].d);
const uint scale = (data_a[ibi].scales[ib32] >> nibble_shift) & 0xF;
const float db = d * (0.5 + scale) * 0.25;
const uint scale_raw = data_a[ibi].scales[ib32];
const uint scale = (scale_raw >> nibble_shift) & 0xF;
// Merge constant calculations d * (0.5 + scale) * 0.25 = d*0.125 + d*scale*0.25
db_vals[n] = d * (0.125f + float(scale) * 0.25f);
ibi += num_blocks_per_row;
}
ibi = a_offset / QUANT_K + first_row * num_blocks_per_row + i;
[[unroll]] for (uint n = 0; n < num_rows; ++n) {
// Preload grid and sign data for all l values
vec4 grid0_vals[2], grid1_vals[2];
uint sign_vals[2], sign7_vals[2];
[[unroll]] for (uint l = 0; l < 2; ++l) {
const uint qs = data_a[ibi].qs[2 * itid + l];
const uint sign = qs >> 9;
const uint sign7 = bitCount(sign);
const vec4 grid0 = vec4(unpack8(iq2xs_grid[qs & 511].x));
const vec4 grid1 = vec4(unpack8(iq2xs_grid[qs & 511].y));
sign_vals[l] = qs >> 9;
sign7_vals[l] = bitCount(sign_vals[l]);
const uvec2 grid_data = iq2xs_grid[qs & 511];
grid0_vals[l] = vec4(unpack8(grid_data.x));
grid1_vals[l] = vec4(unpack8(grid_data.y));
}
// Preload B data for all j columns (reduce repeated index calculations)
[[unroll]] for (uint j = 0; j < NUM_COLS; ++j) {
vec4 b0 = vec4(data_b_v4[(j*p.batch_stride_b + b_offset + y_idx) / 4 + 2*l + 0]);
vec4 b4 = vec4(data_b_v4[(j*p.batch_stride_b + b_offset + y_idx) / 4 + 2*l + 1]);
FLOAT_TYPE sum =
FLOAT_TYPE sum = FLOAT_TYPE(0.0);
[[unroll]] for (uint l = 0; l < 2; ++l) {
const uint sign = sign_vals[l];
const uint sign7 = sign7_vals[l];
const vec4 grid0 = grid0_vals[l];
const vec4 grid1 = grid1_vals[l];
// Precompute indices
const uint b_idx = (j * p.batch_stride_b + b_offset + y_idx) / 4 + 2 * l;
const vec4 b0 = vec4(data_b_v4[b_idx + 0]);
const vec4 b4 = vec4(data_b_v4[b_idx + 1]);
sum +=
fma(FLOAT_TYPE(b0.x), FLOAT_TYPE((sign & 1) != 0 ? -grid0.x : grid0.x),
fma(FLOAT_TYPE(b0.y), FLOAT_TYPE((sign & 2) != 0 ? -grid0.y : grid0.y),
fma(FLOAT_TYPE(b0.z), FLOAT_TYPE((sign & 4) != 0 ? -grid0.z : grid0.z),
@ -39,8 +57,8 @@ void calc_superblock(const uint a_offset, const uint b_offset, const uint itid,
fma(FLOAT_TYPE(b4.z), FLOAT_TYPE((sign & 64) != 0 ? -grid1.z : grid1.z),
fma(FLOAT_TYPE(b4.w), FLOAT_TYPE((sign7 & 1) != 0 ? -grid1.w : grid1.w),
FLOAT_TYPE(0.0)))))))));
temp[j][n] = fma(db, sum, temp[j][n]);
}
temp[j][n] = fma(FLOAT_TYPE(db_vals[n]), sum, temp[j][n]);
}
ibi += num_blocks_per_row;
}