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Fortran: Prefer GCC internal macros to float.h in ISO_Fortran_binding.h. 

2021-09-17  Sandra Loosemore  <sandra@codesourcery.com>
	    Tobias Burnus  <tobias@codesourcery.com>

libgfortran/
	* ISO_Fortran_binding.h: Only include float.h if the C compiler
	doesn't have predefined __LDBL_* and __DBL_* macros. Handle
	LDBL_MANT_DIG == 53 for FreeBSD.
This commit is contained in:
Tobias Burnus 2021-09-17 15:43:30 +02:00
parent 8593d2fcbb
commit 654187d053
1 changed files with 58 additions and 17 deletions
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75
libgfortran/ISO_Fortran_binding.h
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@ -32,7 +32,6 @@ extern "C" {
#include <stddef.h> /* Standard ptrdiff_t tand size_t. */
#include <stdint.h> /* Integer types. */
#include <float.h> /* Macros for floating-point type characteristics. */
/* Constants, defined as macros. */
#define CFI_VERSION 1
@ -217,40 +216,82 @@ extern int CFI_setpointer (CFI_cdesc_t *, CFI_cdesc_t *, const CFI_index_t []);
#endif
/* The situation with long double support is more complicated; we need to
examine the type in more detail to figure out its kind. */
examine the type in more detail to figure out its kind.
GCC and some other compilers predefine the __LDBL* macros; otherwise
get the parameters we need from float.h. */
#if (defined (__LDBL_MANT_DIG__) \
&& defined (__LDBL_MIN_EXP__) \
&& defined (__LDBL_MAX_EXP__) \
&& defined (__DBL_MANT_DIG__) \
&& defined (__DBL_MIN_EXP__) \
&& defined (__DBL_MAX_EXP__))
#define __CFI_LDBL_MANT_DIG__ __LDBL_MANT_DIG__
#define __CFI_LDBL_MIN_EXP__ __LDBL_MIN_EXP__
#define __CFI_LDBL_MAX_EXP__ __LDBL_MAX_EXP__
#define __CFI_DBL_MANT_DIG__ __DBL_MANT_DIG__
#define __CFI_DBL_MIN_EXP__ __DBL_MIN_EXP__
#define __CFI_DBL_MAX_EXP__ __DBL_MAX_EXP__
#else
#include <float.h>
#if (defined (LDBL_MANT_DIG) \
&& defined (LDBL_MIN_EXP) \
&& defined (LDBL_MAX_EXP) \
&& defined (DBL_MANT_DIG) \
&& defined (DBL_MIN_EXP) \
&& defined (DBL_MAX_EXP))
#define __CFI_LDBL_MANT_DIG__ LDBL_MANT_DIG
#define __CFI_LDBL_MIN_EXP__ LDBL_MIN_EXP
#define __CFI_LDBL_MAX_EXP__ LDBL_MAX_EXP
#define __CFI_DBL_MANT_DIG__ DBL_MANT_DIG
#define __CFI_DBL_MIN_EXP__ DBL_MIN_EXP
#define __CFI_DBL_MAX_EXP__ DBL_MAX_EXP
#else
#define CFI_no_long_double 1
#endif /* Definitions from float.h. */
#endif /* Definitions from compiler builtins. */
/* Can't determine anything about long double support? */
#if (defined (CFI_no_long_double))
#define CFI_type_long_double -2
#define CFI_type_long_double_Complex -2
/* Long double is the same kind as double. */
#if (LDBL_MANT_DIG == DBL_MANT_DIG \
&& LDBL_MIN_EXP == DBL_MIN_EXP \
&& LDBL_MAX_EXP == DBL_MAX_EXP)
#elif (__CFI_LDBL_MANT_DIG__ == __CFI_DBL_MANT_DIG__ \
&& __CFI_LDBL_MIN_EXP__ == __CFI_DBL_MIN_EXP__ \
&& __CFI_LDBL_MAX_EXP__ == __CFI_DBL_MAX_EXP__)
#define CFI_type_long_double CFI_type_double
#define CFI_type_long_double_Complex CFI_type_double_Complex
/* This is the 80-bit encoding on x86; Fortran assigns it kind 10. */
#elif (LDBL_MANT_DIG == 64 \
&& LDBL_MIN_EXP == -16381 \
&& LDBL_MAX_EXP == 16384)
#elif ((__CFI_LDBL_MANT_DIG__ == 64 || __CFI_LDBL_MANT_DIG__ == 53) \
&& __CFI_LDBL_MIN_EXP__ == -16381 \
&& __CFI_LDBL_MAX_EXP__ == 16384)
#define CFI_type_long_double (CFI_type_Real + (10 << CFI_type_kind_shift))
#define CFI_type_long_double_Complex (CFI_type_Complex + (10 << CFI_type_kind_shift))
/* This is the 96-bit encoding on m68k; Fortran assigns it kind 10. */
#elif (LDBL_MANT_DIG == 64 \
&& LDBL_MIN_EXP == -16382 \
&& LDBL_MAX_EXP == 16384)
#elif (__CFI_LDBL_MANT_DIG__ == 64 \
&& __CFI_LDBL_MIN_EXP__ == -16382 \
&& __CFI_LDBL_MAX_EXP__ == 16384)
#define CFI_type_long_double (CFI_type_Real + (10 << CFI_type_kind_shift))
#define CFI_type_long_double_Complex (CFI_type_Complex + (10 << CFI_type_kind_shift))
/* This is the IEEE 128-bit encoding, same as float128. */
#elif (LDBL_MANT_DIG == 113 \
&& LDBL_MIN_EXP == -16381 \
&& LDBL_MAX_EXP == 16384)
#elif (__CFI_LDBL_MANT_DIG__ == 113 \
&& __CFI_LDBL_MIN_EXP__ == -16381 \
&& __CFI_LDBL_MAX_EXP__ == 16384)
#define CFI_type_long_double (CFI_type_Real + (16 << CFI_type_kind_shift))
#define CFI_type_long_double_Complex (CFI_type_Complex + (16 << CFI_type_kind_shift))
/* This is the IBM128 encoding used on PowerPC; also assigned kind 16. */
#elif (LDBL_MANT_DIG == 106 \
&& LDBL_MIN_EXP == -968 \
&& LDBL_MAX_EXP == 1024)
#elif (__CFI_LDBL_MANT_DIG__ == 106 \
&& __CFI_LDBL_MIN_EXP__ == -968 \
&& __CFI_LDBL_MAX_EXP__ == 1024)
#define CFI_type_long_double (CFI_type_Real + (16 << CFI_type_kind_shift))
#define CFI_type_long_double_Complex (CFI_type_Complex + (16 << CFI_type_kind_shift))
#define CFI_no_float128 1