gemm_kernels_q4k_q8k_avx2.c File Reference

AVX2 Q4_K x Q8_K matvec kernel (inference only) More...

#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include "ckernel_quant.h"

Go to the source code of this file.

Functions
void	gemv_q4_k_q8_k_avx2 (float *y, const void *W, const void *x_q8, int M, int K)
void	gemv_q4_k_q8_k_ref (float *y, const void *W, const void *x_q8, int M, int K)

Detailed Description

AVX2 Q4_K x Q8_K matvec kernel (inference only)

CK-ENGINE KERNEL RULES:

1. NO malloc/free - memory via bump allocator, pointers passed in
2. NO OpenMP - parallelization at orchestrator/codegen layer
3. API must define: inputs, outputs, workspace, and memory layouts
4. Pure computation - deterministic, no side effects

After changes: make test && make llamacpp-parity-full

Requires AVX2 for 256-bit integer operations.

Definition in file gemm_kernels_q4k_q8k_avx2.c.

Function Documentation

gemv_q4_k_q8_k_avx2()

void gemv_q4_k_q8_k_avx2	(	float *	y,
		const void *	W,
		const void *	x_q8,
		int	M,
		int	K
	)

Definition at line 89 of file gemm_kernels_q4k_q8k_avx2.c.

{
    /* TODO: Implement AVX2 version with correct Q4_K memory layout.
     * For now, fall back to reference implementation which has been
     * fixed to use the correct layout.
     */
    gemv_q4_k_q8_k_ref(y, W, x_q8, M, K);
}

References gemv_q4_k_q8_k_ref().

Referenced by gemv_q4_k_q8_k(), and gemv_q4_k_q8_k_amx().

gemv_q4_k_q8_k_ref()

void gemv_q4_k_q8_k_ref	(	float *	y,
		const void *	W,
		const void *	x_q8,
		int	M,
		int	K
	)

Definition at line 177 of file gemm_kernels_q4k_q8k.c.

{
    if (!y || !W || !x_q8 || M <= 0 || K <= 0) {
        return;
    }
 
    const block_q4_K *blocks = (const block_q4_K *)W;
    const block_q8_K *x = (const block_q8_K *)x_q8;
    const int blocks_per_row = K / QK_K;
 
    for (int row = 0; row < M; ++row) {
        const block_q4_K *w_row = blocks + (size_t)row * (size_t)blocks_per_row;
        y[row] = dot_q4_k_q8_k_ref(w_row, x, K);
    }
}

Referenced by gemv_q4_k_q8_k_avx2().