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41 #ifdef FUNCTION_PROFILE
42 #include "functable.h"
45 #if defined(THUNDERX2T99) || defined(VULCAN)
46 // Multithreaded swap gives performance benefits in ThunderX2T99
48 // Disable multi-threading as it does not show any performance
49 // benefits. Keep the multi-threading code for the record.
55 void NAME(blasint *N, FLOAT *x, blasint *INCX, FLOAT *y, blasint *INCY){
63 void CNAME(blasint n, FLOAT *x, blasint incx, FLOAT *y, blasint incy){
69 FLOAT dummyalpha[2] = {ZERO, ZERO};
82 FUNCTION_PROFILE_START();
84 if (incx < 0) x -= (n - 1) * incx;
85 if (incy < 0) y -= (n - 1) * incy;
88 //disable multi-thread when incx==0 or incy==0
89 //In that case, the threads would be dependent.
90 if (incx == 0 || incy == 0 || n < 2097152 * GEMM_MULTITHREAD_THRESHOLD / sizeof(FLOAT))
93 nthreads = num_cpu_avail(1);
98 SWAP_K(n, 0, 0, ZERO, x, incx, y, incy, NULL, 0);
104 mode = BLAS_XDOUBLE | BLAS_REAL;
105 #elif defined(DOUBLE)
106 mode = BLAS_DOUBLE | BLAS_REAL;
108 mode = BLAS_SINGLE | BLAS_REAL;
111 blas_level1_thread(mode, n, 0, 0, dummyalpha,
112 x, incx, y, incy, NULL, 0, (void *)SWAP_K, nthreads);
117 FUNCTION_PROFILE_END(1, 2 * n, 0);