46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/* Simple tool to convert to/from our internal fp16 representation */
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#include "config.h"
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#include <ccan/err/err.h>
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#include <ccan/opt/opt.h>
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#include <common/fp16.h>
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#include <common/setup.h>
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#include <common/type_to_string.h>
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#include <inttypes.h>
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#include <stdio.h>
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int main(int argc, char *argv[])
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{
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fp16_t fp16val;
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u64 u64min, u64max;
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char *endp;
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common_setup(argv[0]);
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opt_register_noarg("-h|--help", opt_usage_and_exit,
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"[fp16:val|value]\n"
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"Converts to/from fp16, indicates ranges",
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"Get usage information");
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opt_parse(&argc, argv, opt_log_stderr_exit);
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if (argc != 2)
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opt_usage_exit_fail("Expect 1 argument");
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if (strstarts(argv[1], "fp16:"))
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fp16val = strtoul(argv[1] + 5, &endp, 0);
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else
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fp16val = u64_to_fp16(strtoul(argv[1], &endp, 0), false);
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if (*endp)
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opt_usage_exit_fail("Expect valid number");
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u64min = u64max = fp16_to_u64(fp16val);
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while (u64_to_fp16(u64min-1, false) == fp16val)
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u64min--;
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while (u64_to_fp16(u64max+1, false) == fp16val)
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u64max++;
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printf("fp16:0x%x\n"
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"min %"PRIu64"\n"
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"max %"PRIu64"\n",
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fp16val, u64min, u64max);
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common_shutdown();
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}
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