// RUN: %clang_cc1 -fsyntax-only -verify -std=c89 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c99 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c23 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify=finite -std=c23 -ffreestanding -menable-no-nans -menable-no-infs %s
// RUN: %clang_cc1 -fsyntax-only -verify -xc++ -std=c++11 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -xc++ -std=c++14 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -xc++ -std=c++17 -ffreestanding %s
// RUN: %clang_cc1 -fsyntax-only -verify -xc++ -std=c++23 -ffreestanding %s
// NOTE: C++23 wasn't based on top of C23, so it gets no diagnostics for
// finite-math-only mode as happens in C. When C++ rebased onto C23, that
// is when we'll issue diagnostics for INFINITY and NAN use.
// RUN: %clang_cc1 -fsyntax-only -verify -xc++ -std=c++23 -ffreestanding -ffinite-math-only %s
// expected-no-diagnostics
/* Basic floating point conformance checks against:
- C23 Final Std.
- N1570 draft of C11 Std.
- N1256 draft of C99 Std.
- http://port70.net/~nsz/c/c89/c89-draft.html draft of C89/C90 Std.
*/
/*
C23, 5.2.5.3.3p21, pp. 25
C11, 5.2.4.2.2p11, pp. 30
C99, 5.2.4.2.2p9, pp. 25
C89, 2.2.4.2
*/
#include <float.h>
#ifndef FLT_RADIX
#error "Mandatory macro FLT_RADIX is missing."
#elif FLT_RADIX < 2
#error "Mandatory macro FLT_RADIX is invalid."
#endif
#ifndef FLT_MANT_DIG
#error "Mandatory macro FLT_MANT_DIG is missing."
#elif FLT_MANT_DIG < 2
#error "Mandatory macro FLT_MANT_DIG is invalid."
#endif
#ifndef DBL_MANT_DIG
#error "Mandatory macro DBL_MANT_DIG is missing."
#elif DBL_MANT_DIG < 2
#error "Mandatory macro DBL_MANT_DIG is invalid."
#endif
#ifndef LDBL_MANT_DIG
#error "Mandatory macro LDBL_MANT_DIG is missing."
#elif LDBL_MANT_DIG < 2
#error "Mandatory macro LDBL_MANT_DIG is invalid."
#endif
#if ((FLT_MANT_DIG > DBL_MANT_DIG) || (DBL_MANT_DIG > LDBL_MANT_DIG))
#error "Mandatory macros {FLT,DBL,LDBL}_MANT_DIG are invalid."
#endif
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
#ifndef FLT_DECIMAL_DIG
#error "Mandatory macro FLT_DECIMAL_DIG is missing."
#elif FLT_DECIMAL_DIG < 6
#error "Mandatory macro FLT_DECIMAL_DIG is invalid."
#endif
#ifndef DBL_DECIMAL_DIG
#error "Mandatory macro DBL_DECIMAL_DIG is missing."
#elif DBL_DECIMAL_DIG < 10
#error "Mandatory macro DBL_DECIMAL_DIG is invalid."
#endif
#ifndef LDBL_DECIMAL_DIG
#error "Mandatory macro LDBL_DECIMAL_DIG is missing."
#elif LDBL_DECIMAL_DIG < 10
#error "Mandatory macro LDBL_DECIMAL_DIG is invalid."
#endif
#if ((FLT_DECIMAL_DIG > DBL_DECIMAL_DIG) || (DBL_DECIMAL_DIG > LDBL_DECIMAL_DIG))
#error "Mandatory macros {FLT,DBL,LDBL}_DECIMAL_DIG are invalid."
#endif
#ifndef FLT_HAS_SUBNORM
#error "Mandatory macro FLT_HAS_SUBNORM is missing."
#elif FLT_HAS_SUBNORM != __FLT_HAS_DENORM__
#error "Mandatory macro FLT_HAS_SUBNORM is invalid."
#endif
#ifndef LDBL_HAS_SUBNORM
#error "Mandatory macro LDBL_HAS_SUBNORM is missing."
#elif LDBL_HAS_SUBNORM != __LDBL_HAS_DENORM__
#error "Mandatory macro LDBL_HAS_SUBNORM is invalid."
#endif
#ifndef DBL_HAS_SUBNORM
#error "Mandatory macro DBL_HAS_SUBNORM is missing."
#elif DBL_HAS_SUBNORM != __DBL_HAS_DENORM__
#error "Mandatory macro DBL_HAS_SUBNORM is invalid."
#endif
#else
#ifdef FLT_DECIMAL_DIG
#error "Macro FLT_DECIMAL_DIG should not be defined."
#endif
#ifdef DBL_DECIMAL_DIG
#error "Macro DBL_DECIMAL_DIG should not be defined."
#endif
#ifdef LDBL_DECIMAL_DIG
#error "Macro LDBL_DECIMAL_DIG should not be defined."
#endif
#ifdef FLT_HAS_SUBNORM
#error "Macro FLT_HAS_SUBNORM should not be defined."
#endif
#ifdef DBL_HAS_SUBNORM
#error "Macro DBL_HAS_SUBNORM should not be defined."
#endif
#ifdef LDBL_HAS_SUBNORM
#error "Macro LDBL_HAS_SUBNORM should not be defined."
#endif
#endif
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
#ifndef DECIMAL_DIG
#error "Mandatory macro DECIMAL_DIG is missing."
#elif DECIMAL_DIG < 10
#error "Mandatory macro DECIMAL_DIG is invalid."
#endif
#else
#ifdef DECIMAL_DIG
#error "Macro DECIMAL_DIG should not be defined."
#endif
#endif
#ifndef FLT_DIG
#error "Mandatory macro FLT_DIG is missing."
#elif FLT_DIG < 6
#error "Mandatory macro FLT_DIG is invalid."
#endif
#ifndef DBL_DIG
#error "Mandatory macro DBL_DIG is missing."
#elif DBL_DIG < 10
#error "Mandatory macro DBL_DIG is invalid."
#endif
#ifndef LDBL_DIG
#error "Mandatory macro LDBL_DIG is missing."
#elif LDBL_DIG < 10
#error "Mandatory macro LDBL_DIG is invalid."
#endif
#if ((FLT_DIG > DBL_DIG) || (DBL_DIG > LDBL_DIG))
#error "Mandatory macros {FLT,DBL,LDBL}_DIG, are invalid."
#endif
#ifndef FLT_MIN_EXP
#error "Mandatory macro FLT_MIN_EXP is missing."
#elif FLT_MIN_EXP > -1
#error "Mandatory macro FLT_MIN_EXP is invalid."
#endif
#ifndef DBL_MIN_EXP
#error "Mandatory macro DBL_MIN_EXP is missing."
#elif DBL_MIN_EXP > -1
#error "Mandatory macro DBL_MIN_EXP is invalid."
#endif
#ifndef LDBL_MIN_EXP
#error "Mandatory macro LDBL_MIN_EXP is missing."
#elif LDBL_MIN_EXP > -1
#error "Mandatory macro LDBL_MIN_EXP is invalid."
#endif
#ifndef FLT_MIN_10_EXP
#error "Mandatory macro FLT_MIN_10_EXP is missing."
#elif FLT_MIN_10_EXP > -37
#error "Mandatory macro FLT_MIN_10_EXP is invalid."
#endif
#ifndef DBL_MIN_10_EXP
#error "Mandatory macro DBL_MIN_10_EXP is missing."
#elif DBL_MIN_10_EXP > -37
#error "Mandatory macro DBL_MIN_10_EXP is invalid."
#endif
#ifndef LDBL_MIN_10_EXP
#error "Mandatory macro LDBL_MIN_10_EXP is missing."
#elif LDBL_MIN_10_EXP > -37
#error "Mandatory macro LDBL_MIN_10_EXP is invalid."
#endif
#ifndef FLT_MAX_EXP
#error "Mandatory macro FLT_MAX_EXP is missing."
#elif FLT_MAX_EXP < 1
#error "Mandatory macro FLT_MAX_EXP is invalid."
#endif
#ifndef DBL_MAX_EXP
#error "Mandatory macro DBL_MAX_EXP is missing."
#elif DBL_MAX_EXP < 1
#error "Mandatory macro DBL_MAX_EXP is invalid."
#endif
#ifndef LDBL_MAX_EXP
#error "Mandatory macro LDBL_MAX_EXP is missing."
#elif LDBL_MAX_EXP < 1
#error "Mandatory macro LDBL_MAX_EXP is invalid."
#endif
#if ((FLT_MAX_EXP > DBL_MAX_EXP) || (DBL_MAX_EXP > LDBL_MAX_EXP))
#error "Mandatory macros {FLT,DBL,LDBL}_MAX_EXP are invalid."
#endif
#ifndef FLT_MAX_10_EXP
#error "Mandatory macro FLT_MAX_10_EXP is missing."
#elif FLT_MAX_10_EXP < 37
#error "Mandatory macro FLT_MAX_10_EXP is invalid."
#endif
#ifndef DBL_MAX_10_EXP
#error "Mandatory macro DBL_MAX_10_EXP is missing."
#elif DBL_MAX_10_EXP < 37
#error "Mandatory macro DBL_MAX_10_EXP is invalid."
#endif
#ifndef LDBL_MAX_10_EXP
#error "Mandatory macro LDBL_MAX_10_EXP is missing."
#elif LDBL_MAX_10_EXP < 37
#error "Mandatory macro LDBL_MAX_10_EXP is invalid."
#endif
#if ((FLT_MAX_10_EXP > DBL_MAX_10_EXP) || (DBL_MAX_10_EXP > LDBL_MAX_10_EXP))
#error "Mandatory macros {FLT,DBL,LDBL}_MAX_10_EXP are invalid."
#endif
#if __STDC_VERSION__ >= 202311L || !defined(__STRICT_ANSI__)
#ifndef INFINITY
#error "Mandatory macro INFINITY is missing."
#endif
#ifndef NAN
#error "Mandatory macro NAN is missing."
#endif
// FIXME: the NAN and INF diagnostics should only be issued once, not twice.
_Static_assert(_Generic(INFINITY, float : 1, default : 0), ""); // finite-warning {{use of infinity via a macro is undefined behavior due to the currently enabled floating-point options}} \
finite-warning {{use of infinity is undefined behavior due to the currently enabled floating-point options}}
_Static_assert(_Generic(NAN, float : 1, default : 0), ""); // finite-warning {{use of NaN is undefined behavior due to the currently enabled floating-point options}} \
finite-warning {{use of NaN via a macro is undefined behavior due to the currently enabled floating-point options}}
#ifndef FLT_NORM_MAX
#error "Mandatory macro FLT_NORM_MAX is missing."
#else
_Static_assert(FLT_NORM_MAX >= 1.0E+37F, "Mandatory macro FLT_NORM_MAX is invalid.");
#endif
#ifndef DBL_NORM_MAX
#error "Mandatory macro DBL_NORM_MAX is missing."
#else
_Static_assert(DBL_NORM_MAX >= 1.0E+37, "Mandatory macro DBL_NORM_MAX is invalid.");
#endif
#ifndef LDBL_NORM_MAX
#error "Mandatory macro LDBL_NORM_MAX is missing."
#else
_Static_assert(LDBL_NORM_MAX >= 1.0E+37L, "Mandatory macro LDBL_NORM_MAX is invalid.");
#endif
#else
#ifdef INFINITY
#error "Macro INFINITY should not be defined."
#endif
#ifdef NAN
#error "Macro NAN should not be defined."
#endif
#endif
/* Internal consistency checks */
_Static_assert(FLT_RADIX == __FLT_RADIX__, "");
_Static_assert(FLT_MANT_DIG == __FLT_MANT_DIG__, "");
_Static_assert(DBL_MANT_DIG == __DBL_MANT_DIG__, "");
_Static_assert(LDBL_MANT_DIG == __LDBL_MANT_DIG__, "");
#if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
_Static_assert(FLT_DECIMAL_DIG == __FLT_DECIMAL_DIG__, "");
_Static_assert(DBL_DECIMAL_DIG == __DBL_DECIMAL_DIG__, "");
_Static_assert(LDBL_DECIMAL_DIG == __LDBL_DECIMAL_DIG__, "");
#endif
#if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
_Static_assert(DECIMAL_DIG == __DECIMAL_DIG__, "");
#endif
_Static_assert(FLT_DIG == __FLT_DIG__, "");
_Static_assert(DBL_DIG == __DBL_DIG__, "");
_Static_assert(LDBL_DIG == __LDBL_DIG__, "");
_Static_assert(FLT_MIN_EXP == __FLT_MIN_EXP__, "");
_Static_assert(DBL_MIN_EXP == __DBL_MIN_EXP__, "");
_Static_assert(LDBL_MIN_EXP == __LDBL_MIN_EXP__, "");
_Static_assert(FLT_MIN_10_EXP == __FLT_MIN_10_EXP__, "");
_Static_assert(DBL_MIN_10_EXP == __DBL_MIN_10_EXP__, "");
_Static_assert(LDBL_MIN_10_EXP == __LDBL_MIN_10_EXP__, "");
_Static_assert(FLT_MAX_EXP == __FLT_MAX_EXP__, "");
_Static_assert(DBL_MAX_EXP == __DBL_MAX_EXP__, "");
_Static_assert(LDBL_MAX_EXP == __LDBL_MAX_EXP__, "");
_Static_assert(FLT_MAX_10_EXP == __FLT_MAX_10_EXP__, "");
_Static_assert(DBL_MAX_10_EXP == __DBL_MAX_10_EXP__, "");
_Static_assert(LDBL_MAX_10_EXP == __LDBL_MAX_10_EXP__, "");
#if __STDC_VERSION__ >= 202311L || !defined(__STRICT_ANSI__)
_Static_assert(FLT_NORM_MAX == __FLT_NORM_MAX__, "");
_Static_assert(DBL_NORM_MAX == __DBL_NORM_MAX__, "");
_Static_assert(LDBL_NORM_MAX == __LDBL_NORM_MAX__, "");
#if __FINITE_MATH_ONLY__ == 0
// Ensure INFINITY and NAN are suitable for use in a constant expression.
float f1 = INFINITY;
float f2 = NAN;
#endif
#endif
Codebase Browser
llvm