aboutsummaryrefslogtreecommitdiff
path: root/lib/mlibc/options/ansi/musl-generic-math/__expo2.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/mlibc/options/ansi/musl-generic-math/__expo2.c')
-rw-r--r--lib/mlibc/options/ansi/musl-generic-math/__expo2.c16
1 files changed, 0 insertions, 16 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/__expo2.c b/lib/mlibc/options/ansi/musl-generic-math/__expo2.c
deleted file mode 100644
index 740ac68..0000000
--- a/lib/mlibc/options/ansi/musl-generic-math/__expo2.c
+++ /dev/null
@@ -1,16 +0,0 @@
-#include "libm.h"
-
-/* k is such that k*ln2 has minimal relative error and x - kln2 > log(DBL_MIN) */
-static const int k = 2043;
-static const double kln2 = 0x1.62066151add8bp+10;
-
-/* exp(x)/2 for x >= log(DBL_MAX), slightly better than 0.5*exp(x/2)*exp(x/2) */
-double __expo2(double x)
-{
- double scale;
-
- /* note that k is odd and scale*scale overflows */
- INSERT_WORDS(scale, (uint32_t)(0x3ff + k/2) << 20, 0);
- /* exp(x - k ln2) * 2**(k-1) */
- return exp(x - kln2) * scale * scale;
-}