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kmos
65 lines
3.2 KiB
Plaintext
65 lines
3.2 KiB
Plaintext
- math: guard __builtin_roundeven against non-glibc platforms
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6b772fe4e9a0b647f5413a2b56489c776406eaa9
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- math: extend non-glibc guard to Clang and add exp10 guard
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e6f82439d5088c57344f0bc1113ecf8c4cc0a42a
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Index: thirdparty/simde/simde-math.h
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--- thirdparty/simde/simde-math.h.orig
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+++ thirdparty/simde/simde-math.h
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@@ -972,13 +972,18 @@ simde_math_fpclass(double v, const int imm8) {
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#endif
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#endif
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-#if HEDLEY_HAS_BUILTIN(__builtin_exp10) || HEDLEY_GCC_VERSION_CHECK(3,4,0)
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+/* __builtin_exp10 lowers to exp10() which is a GNU extension available
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+ * only in glibc. Other libcs (musl, OpenBSD, FreeBSD, MinGW, etc.)
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+ * lack the symbol and produce a link error. Fall back to pow(10, v). */
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+#if (HEDLEY_HAS_BUILTIN(__builtin_exp10) || HEDLEY_GCC_VERSION_CHECK(3,4,0)) && \
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+ defined(__GLIBC__)
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# define simde_math_exp10(v) __builtin_exp10(v)
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#else
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# define simde_math_exp10(v) simde_math_pow(10.0, (v))
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#endif
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-#if HEDLEY_HAS_BUILTIN(__builtin_exp10f) || HEDLEY_GCC_VERSION_CHECK(3,4,0)
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+#if (HEDLEY_HAS_BUILTIN(__builtin_exp10f) || HEDLEY_GCC_VERSION_CHECK(3,4,0)) && \
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+ defined(__GLIBC__)
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# define simde_math_exp10f(v) __builtin_exp10f(v)
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#else
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# define simde_math_exp10f(v) simde_math_powf(10.0f, (v))
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@@ -1265,9 +1270,16 @@ simde_math_fpclass(double v, const int imm8) {
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#endif
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#if !defined(simde_math_roundeven)
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+ /* __builtin_roundeven lowers to a roundeven() libm call on targets
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+ * without a native rounding instruction (x86 without SSE4.1,
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+ * powerpc, sparc, i386, etc.). roundeven() is C23 and only
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+ * available in glibc >= 2.25; other libcs (musl, OpenBSD, FreeBSD,
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+ * MinGW, etc.) lack the symbol and produce a link error. Guard for
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+ * all compilers: non-glibc platforms use the inline fallback below. */
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#if \
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- ((!defined(HEDLEY_EMSCRIPTEN_VERSION) || HEDLEY_EMSCRIPTEN_VERSION_CHECK(3, 1, 43)) && HEDLEY_HAS_BUILTIN(__builtin_roundeven)) || \
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- HEDLEY_GCC_VERSION_CHECK(10,0,0)
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+ ((!defined(HEDLEY_EMSCRIPTEN_VERSION) || HEDLEY_EMSCRIPTEN_VERSION_CHECK(3, 1, 43)) && \
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+ HEDLEY_HAS_BUILTIN(__builtin_roundeven) && \
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+ (defined(__GLIBC__) && ((__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 25))))
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#define simde_math_roundeven(v) __builtin_roundeven(v)
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#elif defined(simde_math_round) && defined(simde_math_fabs)
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static HEDLEY_INLINE
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@@ -1285,9 +1297,13 @@ simde_math_fpclass(double v, const int imm8) {
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#endif
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#if !defined(simde_math_roundevenf)
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+ /* Same rationale as simde_math_roundeven above; applies to the float
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+ * variant. Both GCC and Clang emit a roundevenf() libm call on
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+ * targets without a native instruction. */
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#if \
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- ((!defined(HEDLEY_EMSCRIPTEN_VERSION) || HEDLEY_EMSCRIPTEN_VERSION_CHECK(3, 1, 43)) && HEDLEY_HAS_BUILTIN(__builtin_roundevenf)) || \
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- HEDLEY_GCC_VERSION_CHECK(10,0,0)
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+ ((!defined(HEDLEY_EMSCRIPTEN_VERSION) || HEDLEY_EMSCRIPTEN_VERSION_CHECK(3, 1, 43)) && \
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+ HEDLEY_HAS_BUILTIN(__builtin_roundevenf) && \
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+ (defined(__GLIBC__) && ((__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 25))))
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#define simde_math_roundevenf(v) __builtin_roundevenf(v)
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#elif defined(simde_math_roundf) && defined(simde_math_fabsf)
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static HEDLEY_INLINE
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