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-rw-r--r--math/tgmath.h135
1 files changed, 89 insertions, 46 deletions
diff --git a/math/tgmath.h b/math/tgmath.h
index 019f072e3e..68cee645f3 100644
--- a/math/tgmath.h
+++ b/math/tgmath.h
@@ -48,19 +48,43 @@
/* This is ugly but unless gcc gets appropriate builtins we have to do
something like this. Don't ask how it works. */
-/* 1 if 'type' is a floating type, 0 if 'type' is an integer type.
- Allows for _Bool. Expands to an integer constant expression. */
+/* __floating_type expands to 1 if TYPE is a floating type (including
+ complex floating types), 0 if TYPE is an integer type (including
+ complex integer types). __real_integer_type expands to 1 if TYPE
+ is a real integer type. __complex_integer_type expands to 1 if
+ TYPE is a complex integer type. All these macros expand to integer
+ constant expressions. All these macros can assume their argument
+ has an arithmetic type (not vector, decimal floating-point or
+ fixed-point), valid to pass to tgmath.h macros. */
# if __GNUC_PREREQ (3, 1)
-# define __floating_type(type) \
- (__builtin_classify_type ((type) 0) == 8 \
- || (__builtin_classify_type ((type) 0) == 9 \
- && __builtin_classify_type (__real__ ((type) 0)) == 8))
+/* __builtin_classify_type expands to an integer constant expression
+ in GCC 3.1 and later. Default conversions applied to the argument
+ of __builtin_classify_type mean it always returns 1 for real
+ integer types rather than ever returning different values for
+ character, boolean or enumerated types. */
+# define __floating_type(type) \
+ (__builtin_classify_type (__real__ ((type) 0)) == 8)
+# define __real_integer_type(type) \
+ (__builtin_classify_type ((type) 0) == 1)
+# define __complex_integer_type(type) \
+ (__builtin_classify_type ((type) 0) == 9 \
+ && __builtin_classify_type (__real__ ((type) 0)) == 1)
# else
-# define __floating_type(type) (((type) 0.25) && ((type) 0.25 - 1))
+/* GCC versions predating __builtin_classify_type are also looser on
+ what counts as an integer constant expression. */
+# define __floating_type(type) (((type) 1.25) != 1)
+# define __real_integer_type(type) (((type) (1.25 + _Complex_I)) == 1)
+# define __complex_integer_type(type) \
+ (((type) (1.25 + _Complex_I)) == (1 + _Complex_I))
# endif
-/* The tgmath real type for T, where E is 0 if T is an integer type and
- 1 for a floating type. */
+/* Whether an expression (of arithmetic type) has a real type. */
+# define __expr_is_real(E) (__builtin_classify_type (E) != 9)
+
+/* The tgmath real type for T, where E is 0 if T is an integer type
+ and 1 for a floating type. If T has a complex type, it is
+ unspecified whether the return type is real or complex (but it has
+ the correct corresponding real type). */
# define __tgmath_real_type_sub(T, E) \
__typeof__ (*(0 ? (__typeof__ (0 ? (double *) 0 : (void *) (E))) 0 \
: (__typeof__ (0 ? (T *) 0 : (void *) (!(E)))) 0))
@@ -70,6 +94,27 @@
__tgmath_real_type_sub (__typeof__ ((__typeof__ (+(expr))) 0), \
__floating_type (__typeof__ (+(expr))))
+/* The tgmath complex type for T, where E1 is 1 if T has a floating
+ type and 0 otherwise, E2 is 1 if T has a real integer type and 0
+ otherwise, and E3 is 1 if T has a complex type and 0 otherwise. */
+# define __tgmath_complex_type_sub(T, E1, E2, E3) \
+ __typeof__ (*(0 \
+ ? (__typeof__ (0 ? (T *) 0 : (void *) (!(E1)))) 0 \
+ : (__typeof__ (0 \
+ ? (__typeof__ (0 \
+ ? (double *) 0 \
+ : (void *) (!(E2)))) 0 \
+ : (__typeof__ (0 \
+ ? (_Complex double *) 0 \
+ : (void *) (!(E3)))) 0)) 0))
+
+/* The tgmath complex type of EXPR. */
+# define __tgmath_complex_type(expr) \
+ __tgmath_complex_type_sub (__typeof__ ((__typeof__ (+(expr))) 0), \
+ __floating_type (__typeof__ (+(expr))), \
+ __real_integer_type (__typeof__ (+(expr))), \
+ __complex_integer_type (__typeof__ (+(expr))))
+
/* Expand to text that checks if ARG_COMB has type _Float128, and if
so calls the appropriately suffixed FCT (which may include a cast),
or FCT and CFCT for complex functions, with arguments ARG_CALL. */
@@ -79,7 +124,7 @@
? fct ## f128 arg_call :
# define __TGMATH_CF128(arg_comb, fct, cfct, arg_call) \
__builtin_types_compatible_p (__typeof (+__real__ (arg_comb)), _Float128) \
- ? (sizeof (+__real__ (arg_comb)) == sizeof (+(arg_comb)) \
+ ? (__expr_is_real (arg_comb) \
? fct ## f128 arg_call \
: cfct ## f128 arg_call) :
# else
@@ -244,19 +289,20 @@
# define __TGMATH_UNARY_REAL_IMAG(Val, Fct, Cfct) \
(__extension__ ((sizeof (+__real__ (Val)) == sizeof (double) \
|| __builtin_classify_type (__real__ (Val)) != 8) \
- ? ((sizeof (+__real__ (Val)) == sizeof (+(Val))) \
- ? (__tgmath_real_type (Val)) Fct (Val) \
- : (__tgmath_real_type (Val)) Cfct (Val)) \
+ ? (__expr_is_real (Val) \
+ ? (__tgmath_complex_type (Val)) Fct (Val) \
+ : (__tgmath_complex_type (Val)) Cfct (Val)) \
: (sizeof (+__real__ (Val)) == sizeof (float)) \
- ? ((sizeof (+__real__ (Val)) == sizeof (+(Val))) \
- ? (__tgmath_real_type (Val)) Fct##f (Val) \
- : (__tgmath_real_type (Val)) Cfct##f (Val)) \
- : __TGMATH_CF128 ((Val), (__tgmath_real_type (Val)) Fct, \
- (__tgmath_real_type (Val)) Cfct, \
+ ? (__expr_is_real (Val) \
+ ? (__tgmath_complex_type (Val)) Fct##f (Val) \
+ : (__tgmath_complex_type (Val)) Cfct##f (Val)) \
+ : __TGMATH_CF128 ((Val), \
+ (__tgmath_complex_type (Val)) Fct, \
+ (__tgmath_complex_type (Val)) Cfct, \
(Val)) \
- ((sizeof (+__real__ (Val)) == sizeof (+(Val))) \
- ? (__tgmath_real_type (Val)) __tgml(Fct) (Val) \
- : (__tgmath_real_type (Val)) __tgml(Cfct) (Val))))
+ (__expr_is_real (Val) \
+ ? (__tgmath_complex_type (Val)) __tgml(Fct) (Val) \
+ : (__tgmath_complex_type (Val)) __tgml(Cfct) (Val))))
# define __TGMATH_UNARY_IMAG(Val, Cfct) \
(__extension__ ((sizeof (+__real__ (Val)) == sizeof (double) \
@@ -278,13 +324,13 @@
# define __TGMATH_UNARY_REAL_IMAG_RET_REAL(Val, Fct, Cfct) \
(__extension__ ((sizeof (+__real__ (Val)) == sizeof (double) \
|| __builtin_classify_type (__real__ (Val)) != 8) \
- ? ((sizeof (+__real__ (Val)) == sizeof (+(Val))) \
+ ? (__expr_is_real (Val) \
? (__typeof__ (__real__ (__tgmath_real_type (Val)) 0))\
Fct (Val) \
: (__typeof__ (__real__ (__tgmath_real_type (Val)) 0))\
Cfct (Val)) \
: (sizeof (+__real__ (Val)) == sizeof (float)) \
- ? ((sizeof (+__real__ (Val)) == sizeof (+(Val))) \
+ ? (__expr_is_real (Val) \
? (__typeof__ (__real__ (__tgmath_real_type (Val)) 0))\
Fct##f (Val) \
: (__typeof__ (__real__ (__tgmath_real_type (Val)) 0))\
@@ -297,7 +343,7 @@
(__real__ \
(__tgmath_real_type (Val)) 0)) Cfct, \
(Val)) \
- ((sizeof (+__real__ (Val)) == sizeof (+(Val))) \
+ (__expr_is_real (Val) \
? (__typeof__ (__real__ (__tgmath_real_type (Val)) 0)) \
__tgml(Fct) (Val) \
: (__typeof__ (__real__ (__tgmath_real_type (Val)) 0)) \
@@ -312,41 +358,38 @@
+ __real__ (Val2)) == 8) \
? __TGMATH_CF128 ((Val1) + (Val2), \
(__typeof \
- ((__tgmath_real_type (Val1)) 0 \
- + (__tgmath_real_type (Val2)) 0)) \
+ ((__tgmath_complex_type (Val1)) 0 \
+ + (__tgmath_complex_type (Val2)) 0)) \
Fct, \
(__typeof \
- ((__tgmath_real_type (Val1)) 0 \
- + (__tgmath_real_type (Val2)) 0)) \
+ ((__tgmath_complex_type (Val1)) 0 \
+ + (__tgmath_complex_type (Val2)) 0)) \
Cfct, \
(Val1, Val2)) \
- ((sizeof (+__real__ (Val1)) == sizeof (+(Val1)) \
- && sizeof (+__real__ (Val2)) == sizeof (+(Val2))) \
- ? (__typeof ((__tgmath_real_type (Val1)) 0 \
- + (__tgmath_real_type (Val2)) 0)) \
+ (__expr_is_real ((Val1) + (Val2)) \
+ ? (__typeof ((__tgmath_complex_type (Val1)) 0 \
+ + (__tgmath_complex_type (Val2)) 0)) \
__tgml(Fct) (Val1, Val2) \
- : (__typeof ((__tgmath_real_type (Val1)) 0 \
- + (__tgmath_real_type (Val2)) 0)) \
+ : (__typeof ((__tgmath_complex_type (Val1)) 0 \
+ + (__tgmath_complex_type (Val2)) 0)) \
__tgml(Cfct) (Val1, Val2)) \
: (sizeof (+__real__ (Val1)) == sizeof (double) \
|| sizeof (+__real__ (Val2)) == sizeof (double) \
|| __builtin_classify_type (__real__ (Val1)) != 8 \
|| __builtin_classify_type (__real__ (Val2)) != 8) \
- ? ((sizeof (+__real__ (Val1)) == sizeof (+(Val1)) \
- && sizeof (+__real__ (Val2)) == sizeof (+(Val2))) \
- ? (__typeof ((__tgmath_real_type (Val1)) 0 \
- + (__tgmath_real_type (Val2)) 0)) \
+ ? (__expr_is_real ((Val1) + (Val2)) \
+ ? (__typeof ((__tgmath_complex_type (Val1)) 0 \
+ + (__tgmath_complex_type (Val2)) 0)) \
Fct (Val1, Val2) \
- : (__typeof ((__tgmath_real_type (Val1)) 0 \
- + (__tgmath_real_type (Val2)) 0)) \
+ : (__typeof ((__tgmath_complex_type (Val1)) 0 \
+ + (__tgmath_complex_type (Val2)) 0)) \
Cfct (Val1, Val2)) \
- : ((sizeof (+__real__ (Val1)) == sizeof (+(Val1)) \
- && sizeof (+__real__ (Val2)) == sizeof (+(Val2))) \
- ? (__typeof ((__tgmath_real_type (Val1)) 0 \
- + (__tgmath_real_type (Val2)) 0)) \
+ : (__expr_is_real ((Val1) + (Val2)) \
+ ? (__typeof ((__tgmath_complex_type (Val1)) 0 \
+ + (__tgmath_complex_type (Val2)) 0)) \
Fct##f (Val1, Val2) \
- : (__typeof ((__tgmath_real_type (Val1)) 0 \
- + (__tgmath_real_type (Val2)) 0)) \
+ : (__typeof ((__tgmath_complex_type (Val1)) 0 \
+ + (__tgmath_complex_type (Val2)) 0)) \
Cfct##f (Val1, Val2))))
#else
# error "Unsupported compiler; you cannot use <tgmath.h>"