OpenBLAS/kernel/arm64/rot_kernel_sve.c

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#include "common.h"
#include <arm_sve.h>

#ifdef DOUBLE
#define SVE_TYPE svfloat64_t
#define SVE_ZERO svdup_f64(0.0)
#define SVE_WHILELT svwhilelt_b64
#define SVE_ALL svptrue_b64()
#define SVE_WIDTH svcntd()
#else
#define SVE_TYPE svfloat32_t
#define SVE_ZERO svdup_f32(0.0)
#define SVE_WHILELT svwhilelt_b32
#define SVE_ALL svptrue_b32()
#define SVE_WIDTH svcntw()
#endif

static int rot_kernel_sve(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT c, FLOAT s)
{
       for (BLASLONG i = 0; i < n; i += SVE_WIDTH)
              {
              svbool_t pg = SVE_WHILELT((uint64_t)i, (uint64_t)n);
              SVE_TYPE x_vec = svld1(pg, &x[i]);
              SVE_TYPE y_vec = svld1(pg, &y[i]);
              SVE_TYPE cx_vec = svmul_z(pg, x_vec, c);
              SVE_TYPE sy_vec = svmul_z(pg, y_vec, s);
              SVE_TYPE sx_vec = svmul_z(pg, x_vec, s);
              SVE_TYPE cy_vec = svmul_z(pg, y_vec, c);
              svst1(pg, &x[i], svadd_z(pg, cx_vec, sy_vec));
              svst1(pg, &y[i], svsub_z(pg, cy_vec, sx_vec));
       }
       return (0);
}