diff options
| -rw-r--r-- | ChangeLog | 83 | ||||
| -rw-r--r-- | NEWS | 5 | ||||
| -rw-r--r-- | math/Makefile | 6 | ||||
| -rwxr-xr-x | math/gen-tgmath-tests.py | 184 | ||||
| -rw-r--r-- | math/tgmath.h | 167 |
5 files changed, 425 insertions, 20 deletions
diff --git a/ChangeLog b/ChangeLog index 2f8b8761ca..ee96090964 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,86 @@ +2019-08-21 Joseph Myers <joseph@codesourcery.com> + + * math/tgmath.h [__HAVE_FLOAT128X]: Give error. + [(__HAVE_FLOAT64X && !__HAVE_FLOAT128) + || (__HAVE_FLOAT128 && !__HAVE_FLOAT64X)]: Likewise. + (__TGMATH_2_NARROW_F): Likewise. + (__TGMATH_2_NARROW_D): New macro. + (__TGMATH_2_NARROW_F16): Likewise. + (__TGMATH_2_NARROW_F32): Likewise. + (__TGMATH_2_NARROW_F64): Likewise. + (__TGMATH_2_NARROW_F32X): Likewise. + (__TGMATH_2_NARROW_F64X): Likewise. + [__HAVE_BUILTIN_TGMATH] (__TGMATH_NARROW_FUNCS_F): Likewise. + [__HAVE_BUILTIN_TGMATH] (__TGMATH_NARROW_FUNCS_F16): Likewise. + [__HAVE_BUILTIN_TGMATH] (__TGMATH_NARROW_FUNCS_F32): Likewise. + [__HAVE_BUILTIN_TGMATH] (__TGMATH_NARROW_FUNCS_F64): Likewise. + [__HAVE_BUILTIN_TGMATH] (__TGMATH_NARROW_FUNCS_F32X): Likewise. + [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)] (fadd): Likewise. + [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)] (dadd): Likewise. + [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)] (fdiv): Likewise. + [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)] (ddiv): Likewise. + [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)] (fmul): Likewise. + [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)] (dmul): Likewise. + [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)] (fsub): Likewise. + [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)] (dsub): Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT16] (f16add): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT16] (f16div): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT16] (f16mul): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT16] (f16sub): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (f32add): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (f32div): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (f32mul): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32] (f32sub): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64 + && (__HAVE_FLOAT64X || __HAVE_FLOAT128)] (f64add): Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64 + && (__HAVE_FLOAT64X || __HAVE_FLOAT128)] (f64div): Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64 + && (__HAVE_FLOAT64X || __HAVE_FLOAT128)] (f64mul): Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64 + && (__HAVE_FLOAT64X || __HAVE_FLOAT128)] (f64sub): Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (f32xadd): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (f32xdiv): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (f32xmul): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT32X] (f32xsub): + Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X + && (__HAVE_FLOAT128X || __HAVE_FLOAT128)] (f64xadd): Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X + && (__HAVE_FLOAT128X || __HAVE_FLOAT128)] (f64xdiv): Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X + && (__HAVE_FLOAT128X || __HAVE_FLOAT128)] (f64xmul): Likewise. + [__GLIBC_USE (IEC_60559_TYPES_EXT) && __HAVE_FLOAT64X + && (__HAVE_FLOAT128X || __HAVE_FLOAT128)] (f64xsub): Likewise. + * math/gen-tgmath-tests.py (Type): Add members + non_standard_real_argument_types_list, long_double_type, + complex_float64_type and float32x_ext_type. + (Type.__init__): Set the new members. + (Type.floating_type): Add new argument floatn. + (Type.real_floating_type): Likewise. + (Type.can_combine_types): Likewise. + (Type.combine_types): Likewise. + (Type.init_types): Create internal Float32x_ext type. + (Tests.__init__): Define Float32x_ext in generated C code. + (Tests.add_tests): Handle narrowing functions. + (Tests.add_all_tests): Likewise. + (Tests.tests_text): Allow variation in mant_dig for narrowing + functions with compilers before GCC 8. + * math/Makefile (tgmath3-narrow-types): New variable. + (tgmath3-narrow-macros): Likewise. + (tgmath3-macros): Add $(tgmath3-narrow-macros). + 2019-08-20 Andreas Schwab <schwab@suse.de> * sysdeps/i386/fpu/libm-test-ulps: Update. diff --git a/NEWS b/NEWS index 045720b3fb..a64b89986a 100644 --- a/NEWS +++ b/NEWS @@ -16,6 +16,11 @@ Major new features: liable to change. Features from C2X are also enabled by _GNU_SOURCE, or by compiling with "gcc -std=gnu2x". +* The <math.h> functions that round their results to a narrower type now + have corresponding type-generic macros in <tgmath.h>, as defined in TS + 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of + Clarification Request 13 to TS 18661-3. + Deprecated and removed features, and other changes affecting compatibility: * The totalorder and totalordermag functions, and the corresponding diff --git a/math/Makefile b/math/Makefile index 15c864c98b..247e31d7b9 100644 --- a/math/Makefile +++ b/math/Makefile @@ -368,6 +368,10 @@ $(foreach t,$(libm-tests-base),\ $(foreach t,$(libm-tests-base),\ $(objpfx)$(t)-compat_totalordermag.o): $(objpfx)libm-test-totalordermag.c +# _Float128x omitted as not supported by gen-tgmath-tests.py. +tgmath3-narrow-types = f d f16 f32 f64 f128 f32x f64x +tgmath3-narrow-macros = $(foreach t,$(tgmath3-narrow-types), \ + $(foreach f,$(libm-narrow-fns),$(t)$(f))) tgmath3-macros = atan2 cbrt ceil copysign erf erfc exp2 expm1 fdim floor \ fma fmax fmin fmod frexp hypot ilogb ldexp lgamma llrint \ llround log10 log1p log2 logb lrint lround nearbyint \ @@ -375,7 +379,7 @@ tgmath3-macros = atan2 cbrt ceil copysign erf erfc exp2 expm1 fdim floor \ scalbln tgamma trunc acos asin atan acosh asinh atanh cos \ sin tan cosh sinh tanh exp log pow sqrt fabs carg cimag conj \ cproj creal roundeven nextup nextdown fminmag fmaxmag llogb \ - fromfp fromfpx ufromfp ufromfpx scalb + fromfp fromfpx ufromfp ufromfpx scalb $(tgmath3-narrow-macros) tgmath3-macro-tests = $(addprefix test-tgmath3-,$(tgmath3-macros)) tests += $(tgmath3-macro-tests) generated += $(addsuffix .c,$(tgmath3-macro-tests)) diff --git a/math/gen-tgmath-tests.py b/math/gen-tgmath-tests.py index 2a7d94e737..1c098440f4 100755 --- a/math/gen-tgmath-tests.py +++ b/math/gen-tgmath-tests.py @@ -69,17 +69,27 @@ class Type(object): # Real argument types that correspond to a standard floating type # (float, double or long double; not _FloatN or _FloatNx). standard_real_argument_types_list = [] + # Real argument types other than float, double and long double + # (i.e., those that are valid as arguments to narrowing macros + # returning _FloatN or _FloatNx). + non_standard_real_argument_types_list = [] # The real floating types by their order properties (which are # tuples giving the positions in both the possible orders above). real_types_order = {} # The type double. double_type = None + # The type long double. + long_double_type = None # The type _Complex double. complex_double_type = None # The type _Float64. float64_type = None + # The type _Complex _Float64. + complex_float64_type = None # The type _Float64x. float64x_type = None + # The type _Float64x if available, otherwise _Float64. + float32x_ext_type = None def __init__(self, name, suffix=None, mant_dig=None, condition='1', order=None, integer=False, complex=False, real_type=None): @@ -109,16 +119,24 @@ class Type(object): Type.real_argument_types_list.append(self) if not self.name.startswith('_Float'): Type.standard_real_argument_types_list.append(self) + if self.name not in ('float', 'double', 'long double'): + Type.non_standard_real_argument_types_list.append(self) if self.order is not None: Type.real_types_order[self.order] = self if self.name == 'double': Type.double_type = self + if self.name == 'long double': + Type.long_double_type = self if self.name == '_Complex double': Type.complex_double_type = self if self.name == '_Float64': Type.float64_type = self + if self.name == '_Complex _Float64': + Type.complex_float64_type = self if self.name == '_Float64x': Type.float64x_type = self + if self.name == 'Float32x_ext': + Type.float32x_ext_type = self @staticmethod def create_type(name, suffix=None, mant_dig=None, condition='1', order=None, @@ -142,18 +160,23 @@ class Type(object): if complex_type is not None: complex_type.register_type(internal) - def floating_type(self): + def floating_type(self, floatn): """Return the corresponding floating type.""" if self.integer: - return (Type.complex_double_type - if self.complex - else Type.double_type) + if floatn: + return (Type.complex_float64_type + if self.complex + else Type.float64_type) + else: + return (Type.complex_double_type + if self.complex + else Type.double_type) else: return self - def real_floating_type(self): + def real_floating_type(self, floatn): """Return the corresponding real floating type.""" - return self.real_type.floating_type() + return self.real_type.floating_type(floatn) def __str__(self): """Return string representation of a type.""" @@ -212,15 +235,21 @@ class Type(object): complex_name='complex_long_double_Float64x', condition='defined HUGE_VAL_F64X', order=(7, 7), internal=True) + # An internal type for the argument type used by f32x* + # narrowing macros (_Float64x if available, otherwise + # _Float64). + Type.create_type('Float32x_ext', None, 'FLT32X_EXT_MANT_DIG', + complex_name='complex_Float32x_ext', + condition='1', internal=True) @staticmethod - def can_combine_types(types): + def can_combine_types(types, floatn): """Return a C preprocessor conditional for whether the given list of types can be used together as type-generic macro arguments.""" have_long_double = False have_float128 = False for t in types: - t = t.real_floating_type() + t = t.real_floating_type(floatn) if t.name == 'long double': have_long_double = True if t.name == '_Float128' or t.name == '_Float64x': @@ -233,14 +262,14 @@ class Type(object): return '1' @staticmethod - def combine_types(types): + def combine_types(types, floatn): """Return the result of combining a set of types.""" have_complex = False combined = None for t in types: if t.complex: have_complex = True - t = t.real_floating_type() + t = t.real_floating_type(floatn) if combined is None: combined = t else: @@ -316,6 +345,7 @@ class Tests(object): ' const char *func_name;\n' ' const char *test_name;\n' ' int mant_dig;\n' + ' int narrow_mant_dig;\n' ' };\n' 'int num_pass, num_fail;\n' 'volatile int called_mant_dig;\n' @@ -345,8 +375,18 @@ class Tests(object): '# endif\n') float64x_text = if_cond_text([Type.float64x_type.condition], float64x_text) + float32x_ext_text = ('#ifdef HUGE_VAL_F64X\n' + 'typedef _Float64x Float32x_ext;\n' + 'typedef __CFLOAT64X complex_Float32x_ext;\n' + '# define FLT32X_EXT_MANT_DIG FLT64X_MANT_DIG\n' + '#else\n' + 'typedef _Float64 Float32x_ext;\n' + 'typedef __CFLOAT64 complex_Float32x_ext;\n' + '# define FLT32X_EXT_MANT_DIG FLT64_MANT_DIG\n' + '#endif\n') self.header_list.append(float64_text) self.header_list.append(float64x_text) + self.header_list.append(float32x_ext_text) self.types_seen = set() for t in Type.all_types_list: self.add_type_var(t.name, t.condition) @@ -377,6 +417,8 @@ class Tests(object): return have_complex = False func = macro + narrowing = False + narrowing_std = False if ret == 'c' or 'c' in args: # Complex-only. have_complex = True @@ -387,6 +429,49 @@ class Tests(object): have_complex = True if complex_func == None: complex_func = 'c%s' % func + # For narrowing macros, compute narrow_args, the list of + # argument types for which there is an actual corresponding + # function. If none of those types exist, or the return type + # does not exist, then the macro is not defined and no tests + # of it can be run. + if ret == 'float': + narrowing = True + narrowing_std = True + narrow_cond = '1' + narrow_args = [Type.double_type, Type.long_double_type] + narrow_fallback = Type.double_type + elif ret == 'double': + narrowing = True + narrowing_std = True + narrow_cond = '1' + narrow_args = [Type.long_double_type] + narrow_fallback = Type.long_double_type + elif ret.startswith('_Float'): + narrowing = True + narrow_args = [] + nret_type = None + narrow_fallback = None + for order, real_type in sorted(Type.real_types_order.items()): + if real_type.name == ret: + nret_type = real_type + elif nret_type and real_type.name.startswith('_Float'): + narrow_args.append(real_type) + if (narrow_fallback is None + and ret.endswith('x') == real_type.name.endswith('x')): + narrow_fallback = real_type + if narrow_args: + narrow_cond = ('(%s && (%s))' + % (nret_type.condition, + ' || '.join(t.condition + for t in narrow_args))) + if narrow_fallback is None: + narrow_fallback = narrow_args[0] + if ret == '_Float32x': + narrow_fallback = Type.float32x_ext_type + else: + # No possible argument types, even conditionally. + narrow_cond = '0' + narrowing_nonstd = narrowing and not narrowing_std types = [ret] + args for t in types: if t != 'c' and t != 'g' and t != 'r' and t != 's': @@ -400,6 +485,8 @@ class Tests(object): continue if ret == 's' and t.name.startswith('_Float'): continue + if narrowing and t not in narrow_args: + continue if ret == 'c': ret_name = t.complex_type.name elif ret == 'g': @@ -432,23 +519,56 @@ class Tests(object): '}\n' % (ret_name, dummy_func_name, t.real_type.suffix, ', '.join(arg_list), t.real_type.mant_dig, dummy_func_name)) - dummy_func = if_cond_text([t.condition], dummy_func) + if narrowing: + dummy_cond = [narrow_cond, t.condition] + else: + dummy_cond = [t.condition] + dummy_func = if_cond_text(dummy_cond, dummy_func) self.test_text_list.append(dummy_func) arg_types = [] for t in args: if t == 'g' or t == 'c': arg_types.append(Type.argument_types_list) elif t == 'r': - arg_types.append(Type.real_argument_types_list) + if narrowing_std: + arg_types.append(Type.standard_real_argument_types_list) + elif narrowing: + arg_types.append( + Type.non_standard_real_argument_types_list) + else: + arg_types.append(Type.real_argument_types_list) elif t == 's': arg_types.append(Type.standard_real_argument_types_list) arg_types_product = list_product(arg_types) test_num = 0 for this_args in arg_types_product: - comb_type = Type.combine_types(this_args) - can_comb = Type.can_combine_types(this_args) + comb_type = Type.combine_types(this_args, narrowing_nonstd) + if narrowing: + # As long as there are no integer arguments, and as + # long as the chosen argument type is as wide as all + # the floating-point arguments passed, the semantics + # of the macro call do not depend on the exact + # function chosen. In particular, for f32x functions + # when _Float64x exists, the chosen type should differ + # for _Float32x and _Float64 arguments, but it is not + # always possible to distinguish those types before + # GCC 7 and the implementation does not attempt to do + # so before GCC 8. + narrow_mant_dig = comb_type.real_type.mant_dig + for arg_type in this_args: + if arg_type.integer: + narrow_mant_dig = 0 + else: + narrow_mant_dig = 0 + if (narrowing + and comb_type not in narrow_args + and narrow_fallback is not None): + comb_type = narrow_fallback + can_comb = Type.can_combine_types(this_args, narrowing_nonstd) all_conds = [t.condition for t in this_args] all_conds.append(can_comb) + if narrowing: + all_conds.append(narrow_cond) any_complex = func == None for t in this_args: if t.complex: @@ -459,8 +579,9 @@ class Tests(object): test_func_name = 'test_%s_%d' % (macro, test_num) test_num += 1 mant_dig = comb_type.real_type.mant_dig - test_text = '%s, "%s", "%s", %s' % (test_func_name, func_name, - test_name, mant_dig) + test_text = '%s, "%s", "%s", %s, %s' % (test_func_name, func_name, + test_name, mant_dig, + narrow_mant_dig) test_text = ' { %s },\n' % test_text test_text = if_cond_text(all_conds, test_text) self.test_array_list.append(test_text) @@ -575,9 +696,16 @@ class Tests(object): self.add_tests('fromfpx', 'intmax_t', ['r', 'int', 'unsigned int']) self.add_tests('ufromfp', 'uintmax_t', ['r', 'int', 'unsigned int']) self.add_tests('ufromfpx', 'uintmax_t', ['r', 'int', 'unsigned int']) - # The functions that round their result to a narrower type, - # and the associated type-generic macros, are not yet - # supported by this script or by glibc. + for fn in ('add', 'div', 'mul', 'sub'): + for ret, prefix in (('float', 'f'), + ('double', 'd'), + ('_Float16', 'f16'), + ('_Float32', 'f32'), + ('_Float64', 'f64'), + ('_Float128', 'f128'), + ('_Float32x', 'f32x'), + ('_Float64x', 'f64x')): + self.add_tests(prefix + fn, ret, ['r', 'r']) # Miscellaneous functions. self.add_tests('scalb', 's', ['s', 's']) @@ -602,6 +730,24 @@ class Tests(object): ' && strcmp (called_func_name,\n' ' tests[i].func_name) == 0)\n' ' num_pass++;\n' + '#if !__GNUC_PREREQ (8, 0)\n' + ' else if (tests[i].narrow_mant_dig > 0\n' + ' && (called_mant_dig\n' + ' >= tests[i].narrow_mant_dig)\n' + ' && strcmp (called_func_name,\n' + ' tests[i].func_name) == 0)\n' + ' {\n' + ' num_pass++;\n' + ' printf ("Test %zu (%s):\\n"\n' + ' " Expected: %s precision %d\\n"\n' + ' " Actual: %s precision %d\\n"\n' + ' " (OK with old GCC)\\n\\n",\n' + ' i, tests[i].test_name,\n' + ' tests[i].func_name,\n' + ' tests[i].mant_dig,\n' + ' called_func_name, called_mant_dig);\n' + ' }\n' + '#endif\n' ' else\n' ' {\n' ' num_fail++;\n' diff --git a/math/tgmath.h b/math/tgmath.h index d9dfca459b..0c58cc9326 100644 --- a/math/tgmath.h +++ b/math/tgmath.h @@ -43,6 +43,25 @@ #if __GNUC_PREREQ (2, 7) +/* Certain cases of narrowing macros only need to call a single + function so cannot use __builtin_tgmath and do not need any + complicated logic. */ +# if __HAVE_FLOAT128X +# error "Unsupported _Float128x type for <tgmath.h>." +# endif +# if ((__HAVE_FLOAT64X && !__HAVE_FLOAT128) \ + || (__HAVE_FLOAT128 && !__HAVE_FLOAT64X)) +# error "Unsupported combination of types for <tgmath.h>." +# endif +# define __TGMATH_2_NARROW_D(F, X, Y) \ + (F ## l (X, Y)) +# define __TGMATH_2_NARROW_F64X(F, X, Y) \ + (F ## f128 (X, Y)) +# if !__HAVE_FLOAT128 +# define __TGMATH_2_NARROW_F32X(F, X, Y) \ + (F ## f64 (X, Y)) +# endif + # if __HAVE_BUILTIN_TGMATH # if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT) @@ -94,6 +113,33 @@ # define __TGMATH_2C(F, C, X, Y) __builtin_tgmath (__TGMATH_RCFUNCS (F, C) \ (X), (Y)) +# define __TGMATH_NARROW_FUNCS_F(X) X, X ## l, +# define __TGMATH_NARROW_FUNCS_F16(X) \ + __TG_F32_ARG (X) __TG_F64_ARG (X) __TG_F128_ARG (X) \ + __TG_F32X_ARG (X) __TG_F64X_ARG (X) __TG_F128X_ARG (X) +# define __TGMATH_NARROW_FUNCS_F32(X) \ + __TG_F64_ARG (X) __TG_F128_ARG (X) \ + __TG_F32X_ARG (X) __TG_F64X_ARG (X) __TG_F128X_ARG (X) +# define __TGMATH_NARROW_FUNCS_F64(X) \ + __TG_F128_ARG (X) \ + __TG_F64X_ARG (X) __TG_F128X_ARG (X) +# define __TGMATH_NARROW_FUNCS_F32X(X) \ + __TG_F64X_ARG (X) __TG_F128X_ARG (X) \ + __TG_F64_ARG (X) __TG_F128_ARG (X) + +# define __TGMATH_2_NARROW_F(F, X, Y) \ + __builtin_tgmath (__TGMATH_NARROW_FUNCS_F (F) (X), (Y)) +# define __TGMATH_2_NARROW_F16(F, X, Y) \ + __builtin_tgmath (__TGMATH_NARROW_FUNCS_F16 (F) (X), (Y)) +# define __TGMATH_2_NARROW_F32(F, X, Y) \ + __builtin_tgmath (__TGMATH_NARROW_FUNCS_F32 (F) (X), (Y)) +# define __TGMATH_2_NARROW_F64(F, X, Y) \ + __builtin_tgmath (__TGMATH_NARROW_FUNCS_F64 (F) (X), (Y)) +# if __HAVE_FLOAT128 +# define __TGMATH_2_NARROW_F32X(F, X, Y) \ + __builtin_tgmath (__TGMATH_NARROW_FUNCS_F32X (F) (X), (Y)) +# endif + # else /* !__HAVE_BUILTIN_TGMATH. */ # ifdef __NO_LONG_DOUBLE_MATH @@ -493,6 +539,65 @@ : (__typeof ((__tgmath_complex_type (Val1)) 0 \ + (__tgmath_complex_type (Val2)) 0)) \ Cfct##f (Val1, Val2)))) + +# define __TGMATH_2_NARROW_F(F, X, Y) \ + (__extension__ (sizeof ((__tgmath_real_type (X)) 0 \ + + (__tgmath_real_type (Y)) 0) > sizeof (double) \ + ? F ## l (X, Y) \ + : F (X, Y))) +/* In most cases, these narrowing macro definitions based on sizeof + ensure that the function called has the right argument format, as + for other <tgmath.h> macros for compilers before GCC 8, but may not + have exactly the argument type (among the types with that format) + specified in the standard logic. + + In the case of macros for _Float32x return type, when _Float64x + exists, _Float64 arguments should result in the *f64 function being + called while _Float32x arguments should result in the *f64x + function being called. These cases cannot be distinguished using + sizeof (or at all if the types are typedefs rather than different + types). However, for these functions it is OK (does not affect the + final result) to call a function with any argument format at least + as wide as all the floating-point arguments, unless that affects + rounding of integer arguments. Integer arguments are considered to + have type _Float64, so the *f64 functions are preferred for f32x* + macros when no argument has a wider floating-point type. */ +# if __HAVE_FLOAT64X_LONG_DOUBLE && __HAVE_DISTINCT_FLOAT128 +# define __TGMATH_2_NARROW_F32(F, X, Y) \ + (__extension__ (sizeof ((__tgmath_real_type (X)) 0 \ + + (__tgmath_real_type (Y)) 0) > sizeof (_Float64) \ + ? __TGMATH_F128 ((X) + (Y), F, (X, Y)) \ + F ## f64x (X, Y) \ + : F ## f64 (X, Y))) +# define __TGMATH_2_NARROW_F64(F, X, Y) \ + (__extension__ (sizeof ((__tgmath_real_type (X)) 0 \ + + (__tgmath_real_type (Y)) 0) > sizeof (_Float64) \ + ? __TGMATH_F128 ((X) + (Y), F, (X, Y)) \ + F ## f64x (X, Y) \ + : F ## f128 (X, Y))) +# define __TGMATH_2_NARROW_F32X(F, X, Y) \ + (__extension__ (sizeof ((__tgmath_real_type (X)) 0 \ + + (__tgmath_real_type (Y)) 0) > sizeof (_Float64) \ + ? __TGMATH_F128 ((X) + (Y), F, (X, Y)) \ + F ## f64x (X, Y) \ + : F ## f64 (X, Y))) +# elif __HAVE_FLOAT128 +# define __TGMATH_2_NARROW_F32(F, X, Y) \ + (__extension__ (sizeof ((__tgmath_real_type (X)) 0 \ + + (__tgmath_real_type (Y)) 0) > sizeof (_Float64) \ + ? F ## f128 (X, Y) \ + : F ## f64 (X, Y))) +# define __TGMATH_2_NARROW_F64(F, X, Y) \ + (F ## f128 (X, Y)) +# define __TGMATH_2_NARROW_F32X(F, X, Y) \ + (__extension__ (sizeof ((__tgmath_real_type (X)) 0 \ + + (__tgmath_real_type (Y)) 0) > sizeof (_Float32x) \ + ? F ## f64x (X, Y) \ + : F ## f64 (X, Y))) +# else +# define __TGMATH_2_NARROW_F32(F, X, Y) \ + (F ## f64 (X, Y)) +# endif # endif /* !__HAVE_BUILTIN_TGMATH. */ #else # error "Unsupported compiler; you cannot use <tgmath.h>" @@ -739,4 +844,66 @@ /* Real part of Z. */ #define creal(Val) __TGMATH_UNARY_REAL_IMAG_RET_REAL_SAME (Val, creal) + +/* Narrowing functions. */ + +#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) + +/* Add. */ +# define fadd(Val1, Val2) __TGMATH_2_NARROW_F (fadd, Val1, Val2) +# define dadd(Val1, Val2) __TGMATH_2_NARROW_D (dadd, Val1, Val2) + +/* Divide. */ +# define fdiv(Val1, Val2) __TGMATH_2_NARROW_F (fdiv, Val1, Val2) +# define ddiv(Val1, Val2) __TGMATH_2_NARROW_D (ddiv, Val1, Val2) + +/* Multiply. */ +# define fmul(Val1, Val2) __TGMATH_2_NARROW_F (fmul, Val1, Val2) +# define dmul(Val1, Val2) __TGMATH_2_NARROW_D (dmul, Val1, Val2) + +/* Subtract. */ +# define fsub(Val1, Val2) __TGMATH_2_NARROW_F (fsub, Val1, Val2) +# define dsub(Val1, Val2) __TGMATH_2_NARROW_D (dsub, Val1, Val2) + +#endif + +#if __GLIBC_USE (IEC_60559_TYPES_EXT) + +# if __HAVE_FLOAT16 +# define f16add(Val1, Val2) __TGMATH_2_NARROW_F16 (f16add, Val1, Val2) +# define f16div(Val1, Val2) __TGMATH_2_NARROW_F16 (f16div, Val1, Val2) +# define f16mul(Val1, Val2) __TGMATH_2_NARROW_F16 (f16mul, Val1, Val2) +# define f16sub(Val1, Val2) __TGMATH_2_NARROW_F16 (f16sub, Val1, Val2) +# endif + +# if __HAVE_FLOAT32 +# define f32add(Val1, Val2) __TGMATH_2_NARROW_F32 (f32add, Val1, Val2) +# define f32div(Val1, Val2) __TGMATH_2_NARROW_F32 (f32div, Val1, Val2) +# define f32mul(Val1, Val2) __TGMATH_2_NARROW_F32 (f32mul, Val1, Val2) +# define f32sub(Val1, Val2) __TGMATH_2_NARROW_F32 (f32sub, Val1, Val2) +# endif + +# if __HAVE_FLOAT64 && (__HAVE_FLOAT64X || __HAVE_FLOAT128) +# define f64add(Val1, Val2) __TGMATH_2_NARROW_F64 (f64add, Val1, Val2) +# define f64div(Val1, Val2) __TGMATH_2_NARROW_F64 (f64div, Val1, Val2) +# define f64mul(Val1, Val2) __TGMATH_2_NARROW_F64 (f64mul, Val1, Val2) +# define f64sub(Val1, Val2) __TGMATH_2_NARROW_F64 (f64sub, Val1, Val2) +# endif + +# if __HAVE_FLOAT32X +# define f32xadd(Val1, Val2) __TGMATH_2_NARROW_F32X (f32xadd, Val1, Val2) +# define f32xdiv(Val1, Val2) __TGMATH_2_NARROW_F32X (f32xdiv, Val1, Val2) +# define f32xmul(Val1, Val2) __TGMATH_2_NARROW_F32X (f32xmul, Val1, Val2) +# define f32xsub(Val1, Val2) __TGMATH_2_NARROW_F32X (f32xsub, Val1, Val2) +# endif + +# if __HAVE_FLOAT64X && (__HAVE_FLOAT128X || __HAVE_FLOAT128) +# define f64xadd(Val1, Val2) __TGMATH_2_NARROW_F64X (f64xadd, Val1, Val2) +# define f64xdiv(Val1, Val2) __TGMATH_2_NARROW_F64X (f64xdiv, Val1, Val2) +# define f64xmul(Val1, Val2) __TGMATH_2_NARROW_F64X (f64xmul, Val1, Val2) +# define f64xsub(Val1, Val2) __TGMATH_2_NARROW_F64X (f64xsub, Val1, Val2) +# endif + +#endif + #endif /* tgmath.h */ |