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#ifndef HVX_BASE_H
#define HVX_BASE_H
#include <stdbool.h>
#include <stdint.h>
#include "hex-utils.h"
#include "hvx-types.h"
static inline void hvx_vec_store_u(void * restrict dst, uint32_t n, HVX_Vector v) {
// Rotate as needed.
v = Q6_V_vlalign_VVR(v, v, (size_t) dst);
uint32_t left_off = (size_t) dst & 127;
uint32_t right_off = left_off + n;
HVX_VectorPred ql_not = Q6_Q_vsetq_R((size_t) dst);
HVX_VectorPred qr = Q6_Q_vsetq2_R(right_off);
if (right_off > 128) {
Q6_vmem_QRIV(qr, (HVX_Vector *) dst + 1, v);
// all 1's
qr = Q6_Q_vcmp_eq_VbVb(v, v);
}
ql_not = Q6_Q_or_QQn(ql_not, qr);
Q6_vmem_QnRIV(ql_not, (HVX_Vector *) dst, v);
}
static inline void hvx_vec_store_a(void * restrict dst, uint32_t n, HVX_Vector v) {
assert((unsigned long) dst % 128 == 0);
HVX_VectorPred m = Q6_Q_or_QQn(Q6_Q_vsetq_R((unsigned long) dst), Q6_Q_vsetq2_R(n));
Q6_vmem_QnRIV(m, (HVX_Vector *) dst, v);
}
static inline HVX_Vector hvx_vec_splat_f32(float v) {
union { float f; uint32_t i; } u = { .f = v };
return Q6_V_vsplat_R(u.i);
}
static inline HVX_Vector hvx_vec_splat_f16(float v) {
union { __fp16 f; uint16_t i; } u = { .f = v };
return Q6_Vh_vsplat_R(u.i);
}
static inline HVX_Vector hvx_vec_repl4(HVX_Vector v) {
// vdelta control to replicate first 4 bytes across all elements
static const uint8_t __attribute__((aligned(128))) repl[128] = {
0x00, 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04,
0x10, 0x10, 0x10, 0x10, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04,
0x20, 0x20, 0x20, 0x20, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04,
0x10, 0x10, 0x10, 0x10, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04,
0x40, 0x40, 0x40, 0x40, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04,
0x10, 0x10, 0x10, 0x10, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04,
0x20, 0x20, 0x20, 0x20, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04,
0x10, 0x10, 0x10, 0x10, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04,
};
HVX_Vector ctrl = *(HVX_Vector *) repl;
return Q6_V_vdelta_VV(v, ctrl);
}
static inline float hvx_vec_get_f32(HVX_Vector v) {
float __attribute__((aligned(128))) x;
hvx_vec_store_a(&x, 4, v);
return x;
}
static inline int32_t hvx_vec_get_i32(HVX_Vector v) {
int32_t __attribute__((aligned(128))) x;
hvx_vec_store_a(&x, 4, v);
return x;
}
static inline HVX_Vector hvx_vec_abs_f16(HVX_Vector v) {
// abs by clearing the fp16 sign bit
HVX_Vector mask = Q6_Vh_vsplat_R(0x7fff);
return Q6_V_vand_VV(v, mask);
}
static inline HVX_Vector hvx_vec_neg_f16(HVX_Vector v) {
// neg by setting the fp16 sign bit
HVX_Vector mask = Q6_Vh_vsplat_R(0x8000);
return Q6_V_vxor_VV(v, mask);
}
static inline HVX_Vector hvx_vec_abs_f32(HVX_Vector v) {
// abs by clearing the fp32 sign bit
HVX_Vector mask = Q6_V_vsplat_R(0x7fffffff);
return Q6_V_vand_VV(v, mask);
}
static inline HVX_Vector hvx_vec_neg_f32(HVX_Vector v) {
#if __HVX_ARCH__ > 75
return Q6_Vsf_vfneg_Vsf(v);
#else
// neg by setting the fp32 sign bit
HVX_Vector mask = Q6_V_vsplat_R(0x80000000);
return Q6_V_vxor_VV(v, mask);
#endif // __HVX_ARCH__ > 75
}
static inline HVX_VectorPred hvx_vec_is_nan_f16(HVX_Vector v) {
const HVX_Vector vnan_exp = Q6_Vh_vsplat_R(0x7C00);
const HVX_Vector vnan_frac = Q6_Vh_vsplat_R(0x7FFF);
// get pred of which are NaN, i.e., exponent bits all 1s and fraction bits non 0s
HVX_VectorPred p_exp = Q6_Q_vcmp_eq_VhVh(Q6_V_vand_VV(v, vnan_exp), vnan_exp);
HVX_VectorPred p_frac = Q6_Q_not_Q(Q6_Q_vcmp_eq_VhVh(Q6_V_vand_VV(v, vnan_frac), vnan_exp));
return Q6_Q_and_QQ(p_exp, p_frac);
}
static inline HVX_Vector hvx_vec_f32_to_f16(HVX_Vector v0, HVX_Vector v1) {
const HVX_Vector zero = Q6_V_vsplat_R(0);
HVX_Vector q0 = Q6_Vqf32_vadd_VsfVsf(v0, zero);
HVX_Vector q1 = Q6_Vqf32_vadd_VsfVsf(v1, zero);
HVX_Vector v = Q6_Vh_vdeal_Vh(Q6_Vhf_equals_Wqf32(Q6_W_vcombine_VV(q1, q0)));
#if __HVX_ARCH__ < 79
// replace NaNs with -INF, older arches produce NaNs for (-INF + 0.0)
const HVX_Vector neg_inf = hvx_vec_splat_f16(-INFINITY);
HVX_VectorPred nan = hvx_vec_is_nan_f16(v);
v = Q6_V_vmux_QVV(nan, neg_inf, v);
#endif
return v;
}
/* Q6_Vsf_equals_Vw is only available on v73+.*/
#if __HVX_ARCH__ < 73
static inline HVX_Vector hvx_vec_i32_to_qf32(HVX_Vector const in)
{
HVX_Vector const vzero = Q6_V_vzero();
HVX_VectorPred is_zero = Q6_Q_vcmp_eq_VwVw(in, vzero);
HVX_Vector lshift = Q6_Vw_vnormamt_Vw(in);
HVX_Vector normalized = Q6_Vw_vasl_VwVw(in, lshift);
HVX_Vector vexp = Q6_Vw_vsub_VwVw(Q6_V_vsplat_R(0x7f + 30), lshift);
HVX_Vector mant = Q6_V_vand_VV(Q6_V_vsplat_R(0xFFFFFF00), normalized);
HVX_Vector ret = Q6_V_vmux_QVV(is_zero, vzero, Q6_Vw_vadd_VwVw(mant, vexp));
return ret;
}
static inline HVX_Vector Q6_Vsf_equals_Vw(HVX_Vector const in)
{
return Q6_Vsf_equals_Vqf32(hvx_vec_i32_to_qf32(in));
}
#endif
static inline HVX_Vector hvx_vec_i16_from_hf_rnd_sat(HVX_Vector vin) {
// This looks complicated.
// Ideally should just be Q6_Vh_equals_Vhf(vin)
// but that instruction does not do proper rounding.
// convert to qf32, multiplying by 1.0 in the process.
HVX_VectorPair v32 = Q6_Wqf32_vmpy_VhfVhf(vin, Q6_Vh_vsplat_R(0x3C00));
// 'in-range' values are +/32752.
// add 192K to it, convert to sf
HVX_Vector v192K = Q6_V_vsplat_R(0x48400000);
HVX_Vector vsf_0 = Q6_Vsf_equals_Vqf32(Q6_Vqf32_vadd_Vqf32Vsf(Q6_V_lo_W(v32), v192K));
HVX_Vector vsf_1 = Q6_Vsf_equals_Vqf32(Q6_Vqf32_vadd_Vqf32Vsf(Q6_V_hi_W(v32), v192K));
// for in-range cases, result is {163858... 229360} so the exponent is always 144.
// if we extract bits 21..0 as a signed quantity, and round 6 bits off, that will be the answer.
// Start by <<10 to get the final 'sign' bit in bit 15...
vsf_0 = Q6_Vw_vasl_VwR(vsf_0, 10);
vsf_1 = Q6_Vw_vasl_VwR(vsf_1, 10);
// now round down to 16
return Q6_Vh_vround_VwVw_sat(vsf_1, vsf_0);
}
#endif /* HVX_BASE_H */
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