22 lines
953 B
Diff
22 lines
953 B
Diff
This ensures `is_iec559` is defined correctly under all long double ABIs,
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including musl and its 64-bit long double. Also, `__ppc__` or `__ppc64__`
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is not defined on gcc.
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--- include/limits
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+++ include/limits
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@@ -426,8 +426,14 @@ protected:
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_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return __builtin_nansl("");}
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_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type denorm_min() _NOEXCEPT {return __LDBL_DENORM_MIN__;}
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-#if (defined(__ppc__) || defined(__ppc64__))
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+#if defined(__powerpc__) || defined(__powerpc64__)
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+#if (__LDBL_MAX_EXP__ > __DBL_MAX_EXP__) || (__LDBL_MANT_DIG__ == __DBL_MANT_DIG__)
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+ /* IEEE 754 quadruple or double precision */
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+ static _LIBCPP_CONSTEXPR const bool is_iec559 = true;
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+#else
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+ /* 128-bit IBM double-double */
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static _LIBCPP_CONSTEXPR const bool is_iec559 = false;
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+#endif
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#else
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static _LIBCPP_CONSTEXPR const bool is_iec559 = true;
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#endif
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