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authorDenis Vlasenko <vda.linux@googlemail.com>2008-12-28 22:15:26 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2008-12-28 22:15:26 +0000
commit657f68a8f714863321c29dd23aa18f0d5ab40d65 (patch)
treef34d83fa156f971b8201d1687062dfc276d4c820 /libm/e_exp.c
parenta5ed82b5f226456bc5dd86b4ee36e4175b4abe2a (diff)
downloaduClibc-alpine-657f68a8f714863321c29dd23aa18f0d5ab40d65.tar.bz2
uClibc-alpine-657f68a8f714863321c29dd23aa18f0d5ab40d65.tar.xz
remove many functions which just call __ieee754_<function>,
define them as aliases instead. text data bss dec hex filename - 45402 180 4 45586 b212 lib/libm-0.9.30-svn.so + 45302 180 4 45486 b1ae lib/libm-0.9.30-svn.so
Diffstat (limited to 'libm/e_exp.c')
-rw-r--r--libm/e_exp.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/libm/e_exp.c b/libm/e_exp.c
index ebf2e5af0..abfb17675 100644
--- a/libm/e_exp.c
+++ b/libm/e_exp.c
@@ -155,3 +155,28 @@ double attribute_hidden __ieee754_exp(double x) /* default IEEE double exp */
return y*twom1000;
}
}
+
+/*
+ * wrapper exp(x)
+ */
+#ifndef _IEEE_LIBM
+double exp(double x)
+{
+ static const double o_threshold = 7.09782712893383973096e+02; /* 0x40862E42, 0xFEFA39EF */
+ static const double u_threshold = -7.45133219101941108420e+02; /* 0xc0874910, 0xD52D3051 */
+
+ double z = __ieee754_exp(x);
+ if (_LIB_VERSION == _IEEE_)
+ return z;
+ if (isfinite(x)) {
+ if (x > o_threshold)
+ return __kernel_standard(x, x, 6); /* exp overflow */
+ if (x < u_threshold)
+ return __kernel_standard(x, x, 7); /* exp underflow */
+ }
+ return z;
+}
+#else
+strong_alias(__ieee754_exp, exp)
+#endif
+libm_hidden_def(exp)