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