Function gatherf

Source/astcenc_vecmathlib_rvv_n.h:908–915

* @brief Load a vector of gathered results from an array; */

 * @brief Load a vector of gathered results from an array;
 */
ASTCENC_SIMD_INLINE vfloat gatherf(const float* base, vint indices)
{
	// NOTE: currently unused,
	//       breaks for negative indices or ones >=2^30
	vuint32m1_t vidx = __riscv_vreinterpret_u32m1(indices.m);
	vidx = __riscv_vsll(vidx, 2, vfloat::vl());
	return vfloat(__riscv_vluxei32_v_f32m1(base, vidx, vfloat::vl()));
}

/**
 * @brief Load a vector of gathered results from an array using byte indices from memory