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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.target/] [arm/] [fp16-rounding-ieee-1.c] - Rev 816
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/* Test intermediate rounding of double to float and then to __fp16, using an example of a number that would round differently if it went directly from double to __fp16. */ /* { dg-do run } */ /* { dg-options "-mfp16-format=ieee" } */ #include <stdlib.h> /* The original double value. */ #define ORIG 0x1.0020008p0 /* The expected (double)((__fp16)((float)ORIG)) value. */ #define ROUNDED 0x1.0000000p0 typedef union u { __fp16 f; unsigned short h; } ufh; ufh s = { ORIG }; ufh r = { ROUNDED }; double d = ORIG; int main (void) { ufh x; /* Test that the rounding is correct for static initializers. */ if (s.h != r.h) abort (); /* Test that the rounding is correct for a casted constant expression not in a static initializer. */ x.f = (__fp16)ORIG; if (x.h != r.h) abort (); /* Test that the rounding is correct for a runtime conversion. */ x.f = (__fp16)d; if (x.h != r.h) abort (); return 0; }
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