542b10bd14
My default header template is GPLv3 but for QEMU code we really should stick to GPLv2-or-later (allowing others to up-license it if they wish). While this is test code we should still be consistent on the source distribution. I wrote all of this code so its not a problem. However there remains one GPLv3 file left which is the crt0-tc2x.S for TriCore. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240227144335.1196131-2-alex.bennee@linaro.org>
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/*
|
|
* Floating Point Convert Doubles to Various
|
|
*
|
|
* Copyright (c) 2019, 2024 Linaro
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
#include <float.h>
|
|
#include <fenv.h>
|
|
|
|
|
|
#include "float_helpers.h"
|
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
|
|
|
typedef struct {
|
|
int flag;
|
|
char *desc;
|
|
} float_mapping;
|
|
|
|
float_mapping round_flags[] = {
|
|
{ FE_TONEAREST, "to nearest" },
|
|
#ifdef FE_UPWARD
|
|
{ FE_UPWARD, "upwards" },
|
|
#endif
|
|
#ifdef FE_DOWNWARD
|
|
{ FE_DOWNWARD, "downwards" },
|
|
#endif
|
|
#ifdef FE_TOWARDZERO
|
|
{ FE_TOWARDZERO, "to zero" }
|
|
#endif
|
|
};
|
|
|
|
static void print_input(double input)
|
|
{
|
|
char *in_fmt = fmt_f64(input);
|
|
printf("from double: %s\n", in_fmt);
|
|
free(in_fmt);
|
|
}
|
|
|
|
static void convert_double_to_single(double input)
|
|
{
|
|
float output;
|
|
char *out_fmt, *flag_fmt;
|
|
|
|
feclearexcept(FE_ALL_EXCEPT);
|
|
|
|
output = input;
|
|
|
|
flag_fmt = fmt_flags();
|
|
out_fmt = fmt_f32(output);
|
|
printf(" to single: %s (%s)\n", out_fmt, flag_fmt);
|
|
free(out_fmt);
|
|
free(flag_fmt);
|
|
}
|
|
|
|
#define xstr(a) str(a)
|
|
#define str(a) #a
|
|
|
|
#define CONVERT_DOUBLE_TO_INT(TYPE, FMT) \
|
|
static void convert_double_to_ ## TYPE(double input) \
|
|
{ \
|
|
TYPE ## _t output; \
|
|
char *flag_fmt; \
|
|
const char to[] = "to " xstr(TYPE); \
|
|
feclearexcept(FE_ALL_EXCEPT); \
|
|
output = input; \
|
|
flag_fmt = fmt_flags(); \
|
|
printf("%11s: %" FMT " (%s)\n", to, output, flag_fmt); \
|
|
free(flag_fmt); \
|
|
}
|
|
|
|
CONVERT_DOUBLE_TO_INT( int32, PRId32)
|
|
CONVERT_DOUBLE_TO_INT(uint32, PRId32)
|
|
CONVERT_DOUBLE_TO_INT( int64, PRId64)
|
|
CONVERT_DOUBLE_TO_INT(uint64, PRId64)
|
|
|
|
int main(int argc, char *argv[argc])
|
|
{
|
|
int i, j, nums;
|
|
|
|
nums = get_num_f64();
|
|
|
|
for (i = 0; i < ARRAY_SIZE(round_flags); ++i) {
|
|
if (fesetround(round_flags[i].flag) != 0) {
|
|
printf("### Rounding %s skipped\n", round_flags[i].desc);
|
|
continue;
|
|
}
|
|
printf("### Rounding %s\n", round_flags[i].desc);
|
|
for (j = 0; j < nums; j++) {
|
|
double input = get_f64(j);
|
|
print_input(input);
|
|
convert_double_to_single(input);
|
|
convert_double_to_int32(input);
|
|
convert_double_to_int64(input);
|
|
convert_double_to_uint32(input);
|
|
convert_double_to_uint64(input);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|