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| author | Cliff Click <cliffc@acm.org> | 2026-08-10 11:11:18 -0700 |
|---|---|---|
| committer | Cliff Click <cliffc@acm.org> | 2026-10-08 16:52:27 -0700 |
| commit | d32f97238c903765dec4e9a9f3cbfa5fd12cded6 (patch) | |
| tree | a5ac731801ef7066bab6359c4e85c2bdd20082a6 /src/test/java/com/seaofnodes/simple/progs/floatToInteger.c | |
| parent | b5ebb2032aa04cf4506d533127d373d4cf5a25c6 (diff) | |
| download | Simple-linear.tar.gz Simple-linear.zip | |
Chapter 25: Modules, Separate Compilation, and SSA Constructionlinear
Co-authored-by: Hsiang-Ying Fu <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: fuhsnn <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: Symious <14933944+symious@users.noreply.github.com>
Co-authored-by: Jun Kawasaki <jun784@gmail.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Diffstat (limited to 'src/test/java/com/seaofnodes/simple/progs/floatToInteger.c')
| -rw-r--r-- | src/test/java/com/seaofnodes/simple/progs/floatToInteger.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/java/com/seaofnodes/simple/progs/floatToInteger.c b/src/test/java/com/seaofnodes/simple/progs/floatToInteger.c new file mode 100644 index 00000000..cf9390d8 --- /dev/null +++ b/src/test/java/com/seaofnodes/simple/progs/floatToInteger.c @@ -0,0 +1,25 @@ +#include <stdint.h> +#include <math.h> +#include <stdio.h> + +extern int64_t float_to_int(double); +extern int64_t float_to_u8(double); + +int main(void) { + double values[] = {0.0,-0.0,6.92,-6.92,0.99,-0.99,255.75,-257.75, + 0x1p63,0x1.fffffffffffffp62,-0x1p63,-0x1.0000000000001p63, + INFINITY,-INFINITY,NAN,-NAN}; + for( unsigned i=0; i<sizeof(values)/sizeof(values[0]); i++ ) { + double x=values[i]; + int64_t expected=isnan(x) ? 0 : x>=0x1p63 ? INT64_MAX + : x<=-0x1p63 ? INT64_MIN : (int64_t)x; + int64_t actual=float_to_int(x), narrow=float_to_u8(x); + if( actual!=expected || narrow!=(expected&255) ) { + fprintf(stderr,"conversion of %g: got %lld / %lld, expected %lld / %lld\n", + x,(long long)actual,(long long)narrow, + (long long)expected,(long long)(expected&255)); + return 1; + } + } + return 0; +} |