cmedfloat/cli/medfloat16_encode.c at main · dottspina/cmedfloat · GitHub

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/*
 * Copyright (c) 2025, Christophe Dufaza
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>

#include "cmedfloat/medfloat16.h"

#include "cmedfloat_cli_utils.h"

static void usage(void)
{
	puts("usage: medfloat16-encode [-p <n>] [-v] <x>");
	puts("");
	puts("-v      verbose output");
	puts("-p <n>  requested precision for fixed-point conversions");
	puts("<x>     floating-point literal, e.g. 1e-3, 0.001, INFINITY, NAN");
}

int main(int argc, char *argv[])
{
	struct cmedfloat_cli_args_encode cli_args;
	struct cmedfloat_medfloat16 mfloat16;
	uint8_t data[MEDFLOAT16_LEN];

	if (!cmedfloat_cli_encode_parse_args(argc, argv, &cli_args, false)) {
		return -1;
	}
	if (cli_args.opt_h) {
		usage();
		return 0;
	}

	if (cli_args.opt_p) {
		mfloat16 = cmedfloat_medfloat16_from_float_fixed(cli_args.x_float, cli_args.p);
	} else {
		mfloat16 = cmedfloat_medfloat16_from_float(cli_args.x_float);
	}
	cmedfloat_medfloat16_encode(mfloat16, data);

	if (cli_args.opt_v) {
		if (cli_args.opt_p) {
			printf("encoding %#g with precision %d:\n", cli_args.x_float, cli_args.p);

		} else {
			printf("encoding %#g with default precision:\n", cli_args.x_float);
		}
	}

	if (cmedfloat_medfloat16_isnres(mfloat16)) {
		printf("NRes    0x%02x%02x\n", data[0], data[1]);
	} else if (cmedfloat_medfloat16_isnormal(mfloat16)) {
		printf("%de%d   0x%02x%02x\n", mfloat16.m, mfloat16.e, data[0], data[1]);
	} else {
		/* Print Nan and +/-INFINITY with %f. */
		printf("%f:     0x%02x%02x\n", (double)cli_args.x_float, data[0], data[1]);
	}

	return 0;
}