qdq_8.cuh

/*
Copied from https://github.com/turboderp/exllamav2
*/

#ifndef _qdq_8_cuh
#define _qdq_8_cuh

#include "qdq_util.cuh"

namespace sglang {
namespace gptq {

__forceinline__ __device__ void shuffle_8bit_4(uint32_t* q, int stride) {}

__forceinline__ __device__ void
dequant_8bit_8(const uint32_t q_0, const uint32_t q_1, half2 (&dq)[4], int stride, const uint32_t zero) {
  half dqh[8];
  for (int i = 0; i < 4; i++)
    dqh[i] = dq_ns(exb(q_0, i * 8, 0xff), zero);
  for (int i = 0; i < 4; i++)
    dqh[i + 4] = dq_ns(exb(q_1, i * 8, 0xff), zero);

  for (int i = 0; i < 4; i++)
    dq[i] = __halves2half2(dqh[i * 2], dqh[i * 2 + 1]);
}

}  // namespace gptq
}  // namespace sglang

#endif