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ggml : improve f16 acceleration for POWER9 ppc64le

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Thomas Fitzsimmons 2022-12-30 18:57:15 -05:00 committed by Georgi Gerganov
parent d97e6005e9
commit 424c410c42
1 changed files with 47 additions and 30 deletions
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ggml.c
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@ -781,18 +781,25 @@ inline static void ggml_vec_dot_f16(const int n, float * restrict s, ggml_fp16_t
const int n32 = (n & ~31);
vector float sum0 = vec_splats (0.0f);
vector float sum1 = vec_splats (0.0f);
vector float sum2 = vec_splats (0.0f);
vector float sum3 = vec_splats (0.0f);
vector float sum4 = vec_splats (0.0f);
vector float sum5 = vec_splats (0.0f);
vector float sum6 = vec_splats (0.0f);
vector float sum7 = vec_splats (0.0f);
for (int i = 0; i < n32; i += 32) {
for (int i = 0, j = 0; i < n32; i += 32, j += 64) {
// Use vec_xl, not vec_ld, because x is sometimes unaligned.
vector unsigned short x0 = vec_xl(i * 2 + 0, x);
vector unsigned short x1 = vec_xl(i * 2 + 16, x);
vector unsigned short x2 = vec_xl(i * 2 + 32, x);
vector unsigned short x3 = vec_xl(i * 2 + 48, x);
vector unsigned short x0 = vec_xl(j + 0, x);
vector unsigned short x1 = vec_xl(j + 16, x);
vector unsigned short x2 = vec_xl(j + 32, x);
vector unsigned short x3 = vec_xl(j + 48, x);
vector unsigned short y0 = vec_xl(i * 2 + 0, y);
vector unsigned short y1 = vec_xl(i * 2 + 16, y);
vector unsigned short y2 = vec_xl(i * 2 + 32, y);
vector unsigned short y3 = vec_xl(i * 2 + 48, y);
vector unsigned short y0 = vec_ld(j + 0, y);
vector unsigned short y1 = vec_ld(j + 16, y);
vector unsigned short y2 = vec_ld(j + 32, y);
vector unsigned short y3 = vec_ld(j + 48, y);
vector float fx0l = vec_extract_fp32_from_shortl(x0);
vector float fx0h = vec_extract_fp32_from_shorth(x0);
@ -812,16 +819,26 @@ inline static void ggml_vec_dot_f16(const int n, float * restrict s, ggml_fp16_t
vector float fy3l = vec_extract_fp32_from_shortl(y3);
vector float fy3h = vec_extract_fp32_from_shorth(y3);
sum0 = vec_add(sum0, vec_mul(fx0l, fy0l));
sum0 = vec_add(sum0, vec_mul(fx0h, fy0h));
sum0 = vec_add(sum0, vec_mul(fx1l, fy1l));
sum0 = vec_add(sum0, vec_mul(fx1h, fy1h));
sum0 = vec_add(sum0, vec_mul(fx2l, fy2l));
sum0 = vec_add(sum0, vec_mul(fx2h, fy2h));
sum0 = vec_add(sum0, vec_mul(fx3l, fy3l));
sum0 = vec_add(sum0, vec_mul(fx3h, fy3h));
sum0 = vec_madd(fx0l, fy0l, sum0);
sum1 = vec_madd(fx0h, fy0h, sum1);
sum2 = vec_madd(fx1l, fy1l, sum2);
sum3 = vec_madd(fx1h, fy1h, sum3);
sum4 = vec_madd(fx2l, fy2l, sum4);
sum5 = vec_madd(fx2h, fy2h, sum5);
sum6 = vec_madd(fx3l, fy3l, sum6);
sum7 = vec_madd(fx3h, fy3h, sum7);
}
sum0 = vec_add(sum0, sum1);
sum2 = vec_add(sum2, sum3);
sum4 = vec_add(sum4, sum5);
sum6 = vec_add(sum6, sum7);
sum0 = vec_add(sum0, sum2);
sum4 = vec_add(sum4, sum6);
sum0 = vec_add(sum0, sum4);
sumf = vec_extract(sum0, 0) + vec_extract(sum0, 1)
+ vec_extract(sum0, 2) + vec_extract(sum0, 3);
@ -896,17 +913,17 @@ inline static void ggml_vec_mad_f16(const int n, ggml_fp16_t * restrict y, ggml_
// TODO: this is temporary because I cannot fit it in the GGML_SIMD pattern like all other architectures without
// being able to test it. hoping someone with access to a POWER9 machine can help out here.
const int n32 = (n & ~31);
for (int i = 0; i < n32; i += 32) {
for (int i = 0, j = 0; i < n32; i += 32, j += 64) {
// Use vec_xl, not vec_ld, because x is sometimes unaligned!
vector unsigned short x0 = vec_xl(i * 2 + 0, x);
vector unsigned short x1 = vec_xl(i * 2 + 16, x);
vector unsigned short x2 = vec_xl(i * 2 + 32, x);
vector unsigned short x3 = vec_xl(i * 2 + 48, x);
vector unsigned short x0 = vec_xl(j + 0, x);
vector unsigned short x1 = vec_xl(j + 16, x);
vector unsigned short x2 = vec_xl(j + 32, x);
vector unsigned short x3 = vec_xl(j + 48, x);
vector unsigned short y0 = vec_xl(i * 2 + 0, y);
vector unsigned short y1 = vec_xl(i * 2 + 16, y);
vector unsigned short y2 = vec_xl(i * 2 + 32, y);
vector unsigned short y3 = vec_xl(i * 2 + 48, y);
vector unsigned short y0 = vec_xl(j + 0, y);
vector unsigned short y1 = vec_xl(j + 16, y);
vector unsigned short y2 = vec_xl(j + 32, y);
vector unsigned short y3 = vec_xl(j + 48, y);
vector float v4 = vec_splats(v);
@ -942,10 +959,10 @@ inline static void ggml_vec_mad_f16(const int n, ggml_fp16_t * restrict y, ggml_
y2 = vec_pack_to_short_fp32(fy2h, fy2l);
y3 = vec_pack_to_short_fp32(fy3h, fy3l);
vec_xst(y0, i * 2 + 0, y);
vec_xst(y1, i * 2 + 16, y);
vec_xst(y2, i * 2 + 32, y);
vec_xst(y3, i * 2 + 48, y);
vec_xst(y0, j + 0, y);
vec_xst(y1, j + 16, y);
vec_xst(y2, j + 32, y);
vec_xst(y3, j + 48, y);
}
for (int i = n32; i < n; ++i) {