n
/
llama.cpp
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update quantize_row_q4_0 for WASM

Browse Source 
Untested
q4_0-q4_2-range-fix
Håkon H. Hitland 1 year ago committed by Georgi Gerganov
parent 5d5f2b2efa
commit b7e704658e
1 changed files with 22 additions and 13 deletions
Show Stats Download Patch File Download Diff File

35
ggml.c
Unescape Escape View File

@ -949,24 +949,32 @@ static void quantize_row_q4_0(const float * restrict x, void * restrict vy, int
}
#elif defined(__wasm_simd128__)
for (int i = 0; i < nb; i++) {
float amax = 0.0f; // absolute max
float max = 0.0f;
float min = 0.0f;
v128_t srcv [8];
v128_t asrcv[8];
v128_t amaxv[8];
v128_t maxv[8];
v128_t minv[8];
for (int l = 0; l < 8; l++) srcv[l] = wasm_v128_load(x + i*32 + 4*l);
for (int l = 0; l < 8; l++) asrcv[l] = wasm_f32x4_abs(srcv[l]);
for (int l = 0; l < 4; l++) amaxv[2*l] = wasm_f32x4_max(asrcv[2*l], asrcv[2*l+1]);
for (int l = 0; l < 2; l++) amaxv[4*l] = wasm_f32x4_max(amaxv[4*l], amaxv[4*l+2]);
for (int l = 0; l < 1; l++) amaxv[8*l] = wasm_f32x4_max(amaxv[8*l], amaxv[8*l+4]);
for (int l = 0; l < 4; l++) maxv[2*l] = wasm_f32x4_max(srcv[2*l], srcv[2*l+1]);
for (int l = 0; l < 2; l++) maxv[4*l] = wasm_f32x4_max(maxv[4*l], maxv[4*l+2]);
for (int l = 0; l < 1; l++) maxv[8*l] = wasm_f32x4_max(maxv[8*l], maxv[8*l+4]);
amax = MAX(
MAX(wasm_f32x4_extract_lane(amaxv[0], 0), wasm_f32x4_extract_lane(amaxv[0], 1)),
MAX(wasm_f32x4_extract_lane(amaxv[0], 2), wasm_f32x4_extract_lane(amaxv[0], 3)));
for (int l = 0; l < 4; l++) minv[2*l] = wasm_f32x4_min(srcv[2*l], srcv[2*l+1]);
for (int l = 0; l < 2; l++) minv[4*l] = wasm_f32x4_min(minv[4*l], minv[4*l+2]);
for (int l = 0; l < 1; l++) minv[8*l] = wasm_f32x4_min(minv[8*l], minv[8*l+4]);
const float d = amax / ((1 << 3) - 1);
max = MAX(
MAX(wasm_f32x4_extract_lane(maxv[0], 0), wasm_f32x4_extract_lane(maxv[0], 1)),
MAX(wasm_f32x4_extract_lane(maxv[0], 2), wasm_f32x4_extract_lane(maxv[0], 3)));
min = MIN(
MIN(wasm_f32x4_extract_lane(minv[0], 0), wasm_f32x4_extract_lane(minv[0], 1)),
MIN(wasm_f32x4_extract_lane(minv[0], 2), wasm_f32x4_extract_lane(minv[0], 3)));
const float magnitude = max >= fabsf(min) ? max : min;
const float d = magnitude / -8;
const float id = d ? 1.0/d : 0.0;
y[i].d = d;
@ -975,9 +983,10 @@ static void quantize_row_q4_0(const float * restrict x, void * restrict vy, int
const v128_t v = wasm_f32x4_mul(srcv[l], wasm_f32x4_splat(id));
const v128_t vf = wasm_f32x4_add(v, wasm_f32x4_splat(8.5f));
const v128_t vi = wasm_i32x4_trunc_sat_f32x4(vf);
const v128_t vc = wasm_i32x4_min_u(vi, wasm_i32x4_splat(15));
y[i].qs[2*l + 0] = wasm_i32x4_extract_lane(vi, 0) | (wasm_i32x4_extract_lane(vi, 1) << 4);
y[i].qs[2*l + 1] = wasm_i32x4_extract_lane(vi, 2) | (wasm_i32x4_extract_lane(vi, 3) << 4);
y[i].qs[2*l + 0] = wasm_i32x4_extract_lane(vc, 0) | (wasm_i32x4_extract_lane(vc, 1) << 4);
y[i].qs[2*l + 1] = wasm_i32x4_extract_lane(vc, 2) | (wasm_i32x4_extract_lane(vc, 3) << 4);
}
}
#else

Write Preview
Loading…
Cancel
Save