fp-int-convert.h

来自「用于进行gcc测试」· C头文件 代码 · 共 90 行

/* Test floating-point conversions.  */
/* Origin: Joseph Myers <[e-mail]> */

#include <limits.h>
extern void abort (void);
extern void exit (int);

/* Not all platforms support TImode integers; logic as in
   gcc.dg/titype-1.c.  */
#if defined(__LP64__) && !defined(__hppa__)
typedef int TItype __attribute__ ((mode (TI)));
typedef unsigned int UTItype __attribute__ ((mode (TI)));
#else
typedef long TItype;
typedef unsigned long UTItype;
#endif

/* TEST_I_F(I, U, F, P) tests conversions between the pair of signed
   and unsigned integer types I and U and the floating-point type F,
   where P is the binary precision of the floating point type.  We
   test conversions of the values 0, 1, 0x7...f, 0x8...0, 0xf...f.  We
   also test conversions of values half way inbetween two
   representable values (rounding both ways), just above half way, and
   just below half way.  */
#define TEST_I_F(I, U, F, P)					\
do {								\
  TEST_I_F_VAL (I, F, (I)0, 1);					\
  TEST_I_F_VAL (I, F, (I)1, 1);					\
  TEST_I_F_VAL (I, F, (I)(((U)~(U)0) >> 1), P_OK1 (P, I));	\
  TEST_I_F_VAL (I, F, (I)(U)~(((U)~(U)0) >> 1), 1);		\
  TEST_I_F_VAL (I, F, (I)(U)~(U)0, P_OK (P, I));		\
  TEST_I_F_VAL (I, F, HVAL0S (P, I), P_OK (P, I));		\
  TEST_I_F_VAL (I, F, HVAL0S (P, I) + 1, P_OK (P, I));		\
  TEST_I_F_VAL (I, F, HVAL0S (P, I) - 1, P_OK (P, I));		\
  TEST_I_F_VAL (I, F, HVAL1S (P, I), P_OK (P, I));		\
  TEST_I_F_VAL (I, F, HVAL1S (P, I) + 1, P_OK (P, I));		\
  TEST_I_F_VAL (I, F, HVAL1S (P, I) - 1, P_OK (P, I));		\
  TEST_I_F_VAL (I, F, -HVAL0S (P, I), P_OK (P, I));		\
  TEST_I_F_VAL (I, F, -HVAL0S (P, I) + 1, P_OK (P, I));		\
  TEST_I_F_VAL (I, F, -HVAL0S (P, I) - 1, P_OK (P, I));		\
  TEST_I_F_VAL (I, F, -HVAL1S (P, I), P_OK (P, I));		\
  TEST_I_F_VAL (I, F, -HVAL1S (P, I) + 1, P_OK (P, I));		\
  TEST_I_F_VAL (I, F, -HVAL1S (P, I) - 1, P_OK (P, I));		\
  TEST_I_F_VAL (U, F, (U)0, 1);					\
  TEST_I_F_VAL (U, F, (U)1, 1);					\
  TEST_I_F_VAL (U, F, (U)(((U)~(U)0) >> 1), P_OK1 (P, U));	\
  TEST_I_F_VAL (U, F, (U)~(((U)~(U)0) >> 1), 1);		\
  TEST_I_F_VAL (U, F, (U)~(U)0, P_OK (P, U));			\
  TEST_I_F_VAL (U, F, HVAL0U (P, U), P_OK (P, U));		\
  TEST_I_F_VAL (U, F, HVAL0U (P, U) + 1, P_OK (P, U));		\
  TEST_I_F_VAL (U, F, HVAL0U (P, U) - 1, P_OK (P, U));		\
  TEST_I_F_VAL (U, F, HVAL1U (P, U), P_OK (P, U));		\
  TEST_I_F_VAL (U, F, HVAL1U (P, U) + 1, P_OK (P, U));		\
  TEST_I_F_VAL (U, F, HVAL1U (P, U) - 1, P_OK (P, U));		\
} while (0)

#define P_OK(P, T) ((P) >= sizeof(T) * CHAR_BIT)
#define P_OK1(P, T) ((P) >= sizeof(T) * CHAR_BIT - 1)
#define HVAL0U(P, U) (U)(P_OK (P, U)					 \
			 ? (U)1						 \
			 : (((U)1 << (sizeof(U) * CHAR_BIT - 1))	 \
			    + ((U)1 << (sizeof(U) * CHAR_BIT - 1 - P))))
#define HVAL1U(P, U) (U)(P_OK (P, U)					 \
			 ? (U)1						 \
			 : (((U)1 << (sizeof(U) * CHAR_BIT - 1))	 \
			    + ((U)3 << (sizeof(U) * CHAR_BIT - 1 - P))))
#define HVAL0S(P, S) (S)(P_OK1 (P, S)					 \
			 ? (S)1						 \
			 : (((S)1 << (sizeof(S) * CHAR_BIT - 2))	 \
			    + ((S)1 << (sizeof(S) * CHAR_BIT - 2 - P))))
#define HVAL1S(P, S) (S)(P_OK1 (P, S)					 \
			 ? (S)1						 \
			 : (((S)1 << (sizeof(S) * CHAR_BIT - 2))	 \
			    + ((S)3 << (sizeof(S) * CHAR_BIT - 2 - P))))

#define TEST_I_F_VAL(IT, FT, VAL, PREC_OK)		\
do {							\
  static volatile IT ivin, ivout;			\
  static volatile FT fv1, fv2;				\
  ivin = (VAL);						\
  fv1 = (VAL);						\
  fv2 = ivin;						\
  ivout = fv2;						\
  if (ivin != (VAL)					\
      || ((PREC_OK) && ivout != ivin)			\
      || ((PREC_OK) && ivout != (VAL))			\
      || fv1 != (VAL) || fv2 != (VAL) || fv1 != fv2)	\
    abort ();						\
} while (0)