Simplify C99 isgreater macros

Simplify the C99 isgreater macros.  Although some support was added
in GCC 2.97, not all targets added support until GCC 3.1.  Therefore
only use the builtins in math.h from GCC 3.1 onwards, and defer to
generic macros otherwise.  Improve the generic isunordered macro
to use compares rather than call fpclassify twice - this is not only
faster but also correct for signaling NaNs.

	* math/math.h: Improve handling of C99 isgreater macros.
	* sysdeps/alpha/fpu/bits/mathinline.h: Remove isgreater macros.
	* sysdeps/m68k/m680x0/fpu/bits/mathinline.h: Likewise.
	* sysdeps/powerpc/bits/mathinline.h: Likewise.
	* sysdeps/sparc/fpu/bits/mathinline.h: Likewise.
	* sysdeps/x86/fpu/bits/mathinline.h: Likewise.

1 files changed, 0 insertions, 93 deletions

diff --git a/sysdeps/x86/fpu/bits/mathinline.h b/sysdeps/x86/fpu/bits/mathinline.h
index bcd99bd..ac31dee 100644
--- a/sysdeps/x86/fpu/bits/mathinline.h
+++ b/sysdeps/x86/fpu/bits/mathinline.h
@@ -26,97 +26,6 @@
 # define __MATH_INLINE __extern_always_inline
 #endif
 
-
-#if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2
-/* GCC 2.97 and up have builtins that actually can be used.  */
-# if !__GNUC_PREREQ (2,97)
-/* ISO C99 defines some macros to perform unordered comparisons.  The
-   ix87 FPU supports this with special opcodes and we should use them.
-   These must not be inline functions since we have to be able to handle
-   all floating-point types.  */
-#  undef isgreater
-#  undef isgreaterequal
-#  undef isless
-#  undef islessequal
-#  undef islessgreater
-#  undef isunordered
-#  ifdef __i686__
-/* For the PentiumPro and more recent processors we can provide
-   better code.  */
-#   define isgreater(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucomip %%st(1), %%st; seta %%al"			      \
-		 : "=a" (__result) : "u" (y), "t" (x) : "cc", "st");	      \
-	__result; })
-#   define isgreaterequal(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucomip %%st(1), %%st; setae %%al"			      \
-		 : "=a" (__result) : "u" (y), "t" (x) : "cc", "st");	      \
-	__result; })
-
-#   define isless(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucomip %%st(1), %%st; seta %%al"			      \
-		 : "=a" (__result) : "u" (x), "t" (y) : "cc", "st");	      \
-	__result; })
-
-#   define islessequal(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucomip %%st(1), %%st; setae %%al"			      \
-		 : "=a" (__result) : "u" (x), "t" (y) : "cc", "st");	      \
-	__result; })
-
-#   define islessgreater(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucomip %%st(1), %%st; setne %%al"			      \
-		 : "=a" (__result) : "u" (y), "t" (x) : "cc", "st");	      \
-	__result; })
-
-#   define isunordered(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucomip %%st(1), %%st; setp %%al"			      \
-		 : "=a" (__result) : "u" (y), "t" (x) : "cc", "st");	      \
-	__result; })
-#  else
-/* This is the dumb, portable code for i386 and above.  */
-#   define isgreater(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucompp; fnstsw; testb $0x45, %%ah; setz %%al"	      \
-		 : "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
-	__result; })
-
-#   define isgreaterequal(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucompp; fnstsw; testb $0x05, %%ah; setz %%al"	      \
-		 : "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
-	__result; })
-
-#   define isless(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucompp; fnstsw; testb $0x45, %%ah; setz %%al"	      \
-		 : "=a" (__result) : "u" (x), "t" (y) : "cc", "st", "st(1)"); \
-	__result; })
-
-#   define islessequal(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucompp; fnstsw; testb $0x05, %%ah; setz %%al"	      \
-		 : "=a" (__result) : "u" (x), "t" (y) : "cc", "st", "st(1)"); \
-	__result; })
-
-#   define islessgreater(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucompp; fnstsw; testb $0x44, %%ah; setz %%al"	      \
-		 : "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
-	__result; })
-
-#   define isunordered(x, y) \
-     ({ register char __result;						      \
-	__asm__ ("fucompp; fnstsw; sahf; setp %%al"			      \
-		 : "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
-	__result; })
-#  endif /* __i686__ */
-# endif	/* GCC 2.97 */
-
 /* The gcc, version 2.7 or below, has problems with all this inlining
    code.  So disable it for this version of the compiler.  */
 # if __GNUC_PREREQ (2, 8)
@@ -154,8 +63,6 @@ __NTH (__signbitl (long double __x))
 }
 
 # endif
-#endif
-
 
 /* The gcc, version 2.7 or below, has problems with all this inlining
    code.  So disable it for this version of the compiler.  */