gcc/gcc7-rh1467526.patch

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2017-07-09 12:26:16 +00:00
2017-07-07 Peter Bergner <bergner@vnet.ibm.com>
* config/rs6000/float128-ifunc.c: Don't include auxv.h.
(have_ieee_hw_p): Delete function.
(SW_OR_HW) Use __builtin_cpu_supports().
--- libgcc/config/rs6000/float128-ifunc.c (revision 250060)
+++ libgcc/config/rs6000/float128-ifunc.c (revision 250061)
@@ -45,47 +45,7 @@
#error "This module must not be compiled with IEEE 128-bit hardware support"
#endif
-#include <sys/auxv.h>
-
-/* Use the namespace clean version of getauxval. However, not all versions of
- sys/auxv.h declare it, so declare it here. This code is intended to be
- temporary until a suitable version of __builtin_cpu_supports is added that
- allows us to tell quickly if the machine supports IEEE 128-bit hardware. */
-extern unsigned long __getauxval (unsigned long);
-
-static int
-have_ieee_hw_p (void)
-{
- static int ieee_hw_p = -1;
-
- if (ieee_hw_p < 0)
- {
- char *p = (char *) __getauxval (AT_PLATFORM);
-
- ieee_hw_p = 0;
-
- /* Don't use atoi/strtol/strncmp/etc. These may require the normal
- environment to be setup to set errno to 0, and the ifunc resolvers run
- before the whole glibc environment is initialized. */
- if (p && p[0] == 'p' && p[1] == 'o' && p[2] == 'w' && p[3] == 'e'
- && p[4] == 'r')
- {
- long n = 0;
- char ch;
-
- p += 5;
- while ((ch = *p++) >= '0' && (ch <= '9'))
- n = (n * 10) + (ch - '0');
-
- if (n >= 9)
- ieee_hw_p = 1;
- }
- }
-
- return ieee_hw_p;
-}
-
-#define SW_OR_HW(SW, HW) (have_ieee_hw_p () ? HW : SW)
+#define SW_OR_HW(SW, HW) (__builtin_cpu_supports ("ieee128") ? HW : SW)
/* Resolvers. */