diff options
| -rw-r--r-- | ggml.c | 44 |
1 files changed, 44 insertions, 0 deletions
@@ -1016,6 +1016,50 @@ static void dequantize_row_q4_1(const void * restrict vx, float * restrict y, in } } } +#elif defined(__ARM_NEON) + for (int i = 0; i < nb; i++) { + const float32x4_t vd = vdupq_n_f32(x[i].d); + const float32x4_t vm = vdupq_n_f32(x[i].m); + + const uint8_t * restrict pp = x[i].qs; + + for (int l = 0; l < QK; l += 16) { + // Load 16x4-bit integers into 8x8-bit integers + const uint8x8_t v8 = vld1_u8(pp + l/2); + + // Expand 4-bit qs to 8-bit bytes + const uint8x8_t v0 = vand_u8(v8, vdup_n_u8(0x0f)); + const uint8x8_t v1 = vshr_n_u8(v8, 4); + + // Interleave and combine + const uint8x8_t vx_0 = vzip1_u8(v0, v1); + const uint8x8_t vx_1 = vzip2_u8(v0, v1); + + const uint8x16_t vq = vcombine_u8(vx_0, vx_1); + + // convert to 2x uint16x8_t + const uint16x8_t vi_0 = vmovl_s8(vget_low_u8 (vq)); + const uint16x8_t vi_1 = vmovl_s8(vget_high_u8(vq)); + + // convert to 4x float32x4_t + const float32x4_t vf_0 = vcvtq_f32_u32(vmovl_u16(vget_low_u16 (vi_0))); + const float32x4_t vf_1 = vcvtq_f32_u32(vmovl_u16(vget_high_u16(vi_0))); + const float32x4_t vf_2 = vcvtq_f32_u32(vmovl_u16(vget_low_u16 (vi_1))); + const float32x4_t vf_3 = vcvtq_f32_u32(vmovl_u16(vget_high_u16(vi_1))); + + // multiply by d and add m + const float32x4_t r0 = vmlaq_f32(vm, vf_0, vd); + const float32x4_t r1 = vmlaq_f32(vm, vf_1, vd); + const float32x4_t r2 = vmlaq_f32(vm, vf_2, vd); + const float32x4_t r3 = vmlaq_f32(vm, vf_3, vd); + + // Store + vst1q_f32(y + i*QK + l + 0, r0); + vst1q_f32(y + i*QK + l + 4, r1); + vst1q_f32(y + i*QK + l + 8, r2); + vst1q_f32(y + i*QK + l + 12, r3); + } + } #else for (int i = 0; i < nb; i++) { const float d = x[i].d; |