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ggml-cpu: reattempt fp32->fp16

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Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>
This commit is contained in:
Aaron Teo
2025-06-21 17:20:20 +08:00
parent 54811fc128
commit e12e9fe704
1 changed files with 6 additions and 4 deletions
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10
ggml/src/ggml-cpu/ggml-cpu.c
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@@ -3142,10 +3142,12 @@ void ggml_cpu_fp32_to_fp16(const float * x, ggml_fp16_t * y, int64_t n) {
_mm_storel_epi64((__m128i *)(y + i), y_vec);
}
#elif defined(__NNPA__)
for (; i + 3 < n; i += 4) {
float32x4_t v_x = vec_xl(0, (const float *)(x + i));
uint16x8_t v_xd = vec_convert_to_fp16(v_x, 0);
vec_xst(v_xd, 0, (ggml_fp16_t *)(y + i));
for (; i + 7 < n; i += 8) {
float32x4_t v_xh = vec_xl(0, (const float *)(x + i + 0));
float32x4_t v_xl = vec_xl(0, (const float *)(x + i + 4));
__vector short int v_xd = vec_round_from_fp32(v_xh, v_xl, 0);
__vector short int v_xfp16 = vec_convert_to_fp16(v_xd, 0);
vec_xst(v_xfp16, 0, (ggml_fp16_t *)(y + i));
}
#endif
for (; i < n; ++i) {