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authorIan Moffett <ian@osmora.org>2024-03-07 17:28:52 -0500
committerIan Moffett <ian@osmora.org>2024-03-07 18:24:51 -0500
commitf5e48e94a2f4d4bbd6e5628c7f2afafc6dbcc459 (patch)
tree93b156621dc0303816b37f60ba88051b702d92f6 /lib/mlibc/options/ansi/musl-generic-math/atanhf.c
parentbd5969fc876a10b18613302db7087ef3c40f18e1 (diff)
build: Build mlibc + add distclean target
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'lib/mlibc/options/ansi/musl-generic-math/atanhf.c')
-rw-r--r--lib/mlibc/options/ansi/musl-generic-math/atanhf.c28
1 files changed, 0 insertions, 28 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/atanhf.c b/lib/mlibc/options/ansi/musl-generic-math/atanhf.c
deleted file mode 100644
index 65f07c0..0000000
--- a/lib/mlibc/options/ansi/musl-generic-math/atanhf.c
+++ /dev/null
@@ -1,28 +0,0 @@
-#include "libm.h"
-
-/* atanh(x) = log((1+x)/(1-x))/2 = log1p(2x/(1-x))/2 ~= x + x^3/3 + o(x^5) */
-float atanhf(float x)
-{
- union {float f; uint32_t i;} u = {.f = x};
- unsigned s = u.i >> 31;
- float_t y;
-
- /* |x| */
- u.i &= 0x7fffffff;
- y = u.f;
-
- if (u.i < 0x3f800000 - (1<<23)) {
- if (u.i < 0x3f800000 - (32<<23)) {
- /* handle underflow */
- if (u.i < (1<<23))
- FORCE_EVAL((float)(y*y));
- } else {
- /* |x| < 0.5, up to 1.7ulp error */
- y = 0.5f*log1pf(2*y + 2*y*y/(1-y));
- }
- } else {
- /* avoid overflow */
- y = 0.5f*log1pf(2*(y/(1-y)));
- }
- return s ? -y : y;
-}