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ggml : Leverage the existing GGML_F32_VEC helpers to vectorize ggml_vec_set_f32 for faster fills (#16522)

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* Leverage the existing GGML_F32_VEC helpers to broadcast the fill value across SIMD registers and store in vector-sized chunks, while retaining the scalar tail for leftover elements and non-SIMD builds.

* Vectorize additional f32 helper loops

* Normalize f32 helper tails for ggml vec ops

---------

Co-authored-by: Aaron <shelhamer.aaron@gmail.com>
This commit is contained in:
sirus20x6
2025-10-22 05:14:14 -05:00
committed by GitHub
parent d8eaa26e4d
commit 19a5a3edfd
1 changed files with 91 additions and 5 deletions
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96
ggml/src/ggml-cpu/vec.h
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@@ -77,16 +77,85 @@ inline static void ggml_vec_add_f16 (const int n, ggml_fp16_t * z, const ggml_fp
z[i] = GGML_CPU_FP32_TO_FP16(GGML_CPU_FP16_TO_FP32(x[i]) + GGML_CPU_FP16_TO_FP32(y[i]));
}
}
inline static void ggml_vec_add1_f32(const int n, float * z, const float * x, const float v) { for (int i = 0; i < n; ++i) z[i] = x[i] + v; }
inline static void ggml_vec_acc_f32 (const int n, float * y, const float * x) { for (int i = 0; i < n; ++i) y[i] += x[i]; }
inline static void ggml_vec_acc1_f32(const int n, float * y, const float v) { for (int i = 0; i < n; ++i) y[i] += v; }
inline static void ggml_vec_add1_f32(const int n, float * z, const float * x, const float v) {
int i = 0;
#if defined(GGML_SIMD)
const int np = (n & ~(GGML_F32_STEP - 1));
GGML_F32_VEC vv = GGML_F32_VEC_SET1(v);
for (; i < np; i += GGML_F32_STEP) {
for (int j = 0; j < GGML_F32_ARR; ++j) {
GGML_F32_VEC ax = GGML_F32_VEC_LOAD(x + i + j*GGML_F32_EPR);
GGML_F32_VEC az = GGML_F32_VEC_ADD(ax, vv);
GGML_F32_VEC_STORE(z + i + j*GGML_F32_EPR, az);
}
}
#endif
for (; i < n; ++i) {
z[i] = x[i] + v;
}
}
inline static void ggml_vec_acc_f32 (const int n, float * y, const float * x) {
int i = 0;
#if defined(GGML_SIMD)
const int np = (n & ~(GGML_F32_STEP - 1));
for (; i < np; i += GGML_F32_STEP) {
for (int j = 0; j < GGML_F32_ARR; ++j) {
GGML_F32_VEC ay = GGML_F32_VEC_LOAD(y + i + j*GGML_F32_EPR);
GGML_F32_VEC ax = GGML_F32_VEC_LOAD(x + i + j*GGML_F32_EPR);
ay = GGML_F32_VEC_ADD(ay, ax);
GGML_F32_VEC_STORE(y + i + j*GGML_F32_EPR, ay);
}
}
#endif
for (; i < n; ++i) {
y[i] += x[i];
}
}
inline static void ggml_vec_acc1_f32(const int n, float * y, const float v) {
int i = 0;
#if defined(GGML_SIMD)
const int np = (n & ~(GGML_F32_STEP - 1));
GGML_F32_VEC vv = GGML_F32_VEC_SET1(v);
for (; i < np; i += GGML_F32_STEP) {
for (int j = 0; j < GGML_F32_ARR; ++j) {
GGML_F32_VEC ay = GGML_F32_VEC_LOAD(y + i + j*GGML_F32_EPR);
ay = GGML_F32_VEC_ADD(ay, vv);
GGML_F32_VEC_STORE(y + i + j*GGML_F32_EPR, ay);
}
}
#endif
for (; i < n; ++i) {
y[i] += v;
}
}
inline static void ggml_vec_sub_f32 (const int n, float * z, const float * x, const float * y) { for (int i = 0; i < n; ++i) z[i] = x[i] - y[i]; }
inline static void ggml_vec_sub_f16 (const int n, ggml_fp16_t * z, const ggml_fp16_t * x, const ggml_fp16_t * y) {
for (int i = 0; i < n; ++i) {
z[i] = GGML_CPU_FP32_TO_FP16(GGML_CPU_FP16_TO_FP32(x[i]) - GGML_CPU_FP16_TO_FP32(y[i]));
}
}
inline static void ggml_vec_set_f32 (const int n, float * x, const float v) { for (int i = 0; i < n; ++i) x[i] = v; }
inline static void ggml_vec_set_f32 (const int n, float * x, const float v) {
int i = 0;
#if defined(GGML_SIMD)
const int np = (n & ~(GGML_F32_STEP - 1));
GGML_F32_VEC vx = GGML_F32_VEC_SET1(v);
for (; i < np; i += GGML_F32_STEP) {
for (int j = 0; j < GGML_F32_ARR; ++j) {
GGML_F32_VEC_STORE(x + i + j*GGML_F32_EPR, vx);
}
}
#endif
for (; i < n; ++i) {
x[i] = v;
}
}
inline static void ggml_vec_cpy_f32 (const int n, float * y, const float * x) { for (int i = 0; i < n; ++i) y[i] = x[i]; }
inline static void ggml_vec_neg_f32 (const int n, float * y, const float * x) { for (int i = 0; i < n; ++i) y[i] = -x[i]; }
inline static void ggml_vec_neg_f16 (const int n, ggml_fp16_t * y, const ggml_fp16_t * x) {
@@ -95,7 +164,24 @@ inline static void ggml_vec_neg_f16 (const int n, ggml_fp16_t * y, const ggml_fp
}
}
inline static void ggml_vec_mul_f32 (const int n, float * z, const float * x, const float * y) { for (int i = 0; i < n; ++i) z[i] = x[i]*y[i]; }
inline static void ggml_vec_mul_f32 (const int n, float * z, const float * x, const float * y) {
int i = 0;
#if defined(GGML_SIMD)
const int np = (n & ~(GGML_F32_STEP - 1));
for (; i < np; i += GGML_F32_STEP) {
for (int j = 0; j < GGML_F32_ARR; ++j) {
GGML_F32_VEC ax = GGML_F32_VEC_LOAD(x + i + j*GGML_F32_EPR);
GGML_F32_VEC ay = GGML_F32_VEC_LOAD(y + i + j*GGML_F32_EPR);
GGML_F32_VEC az = GGML_F32_VEC_MUL(ax, ay);
GGML_F32_VEC_STORE(z + i + j*GGML_F32_EPR, az);
}
}
#endif
for (; i < n; ++i) {
z[i] = x[i]*y[i];
}
}
inline static void ggml_vec_mul_f16 (const int n, ggml_fp16_t * z, const ggml_fp16_t * x, const ggml_fp16_t * y) {
for (int i = 0; i < n; ++i) {
z[i] = GGML_CPU_FP32_TO_FP16(GGML_CPU_FP16_TO_FP32(x[i]) * GGML_CPU_FP16_TO_FP32(y[i]));