2  * fp-bench.c - A collection of simple floating point microbenchmarks.
7  *   See the COPYING file in the top-level directory.
51 enum precision {  enum
125 static enum precision precision;  variable
147 static void update_random_ops(int n_ops, enum precision prec)  in update_random_ops()
179             uint64_t lo = r.low;  in update_random_ops()
194 static void fill_random(union fp *ops, int n_ops, enum precision prec,  in fill_random()
230  * on the compiler to unfold this at compile-time.
232 static void bench(enum precision prec, enum op op, int n_ops, bool no_neg)  in bench()
256                     res.f = a - b;  in bench()
291                     res.d = a - b;  in bench()
421         ns_elapsed += get_clock() - t0;  in bench()
493     f = bench_funcs[operation][precision];  in run_bench()
498 /* @arr must be NULL-terminated */
508     return -1;  in find_name()
518     fprintf(stderr, " -d = duration, in seconds. Default: %d\n",  in usage_complete()
520     fprintf(stderr, " -h = show this help message.\n");  in usage_complete()
521     fprintf(stderr, " -o = floating point operation (%s). Default: %s\n",  in usage_complete()
523     fprintf(stderr, " -p = floating point precision (single, double, quad[soft only]). "  in usage_complete()
525     fprintf(stderr, " -r = rounding mode (even, zero, down, up, tieaway). "  in usage_complete()
527     fprintf(stderr, " -t = tester (%s). Default: %s\n",  in usage_complete()
529     fprintf(stderr, " -z = flush inputs to zero (soft tester only). "  in usage_complete()
531     fprintf(stderr, " -Z = flush output to zero (soft tester only). "  in usage_complete()
547     return -1;  in round_name_to_mode()
641                 precision = PREC_SINGLE;  in parse_args()
643                 precision = PREC_DOUBLE;  in parse_args()
645                 precision = PREC_QUAD;  in parse_args()
647                 fprintf(stderr, "Unsupported precision '%s'\n", optarg);  in parse_args()
675     /* set precision and rounding mode based on the tester */  in parse_args()
682         switch (precision) {  in parse_args()
684             precision = PREC_FLOAT32;  in parse_args()
687             precision = PREC_FLOAT64;  in parse_args()
690             precision = PREC_FLOAT128;  in parse_args()