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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/fmod.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/fmod.c')
-rw-r--r--lib/mlibc/options/ansi/musl-generic-math/fmod.c68
1 files changed, 0 insertions, 68 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/fmod.c b/lib/mlibc/options/ansi/musl-generic-math/fmod.c
deleted file mode 100644
index 6849722..0000000
--- a/lib/mlibc/options/ansi/musl-generic-math/fmod.c
+++ /dev/null
@@ -1,68 +0,0 @@
-#include <math.h>
-#include <stdint.h>
-
-double fmod(double x, double y)
-{
- union {double f; uint64_t i;} ux = {x}, uy = {y};
- int ex = ux.i>>52 & 0x7ff;
- int ey = uy.i>>52 & 0x7ff;
- int sx = ux.i>>63;
- uint64_t i;
-
- /* in the followings uxi should be ux.i, but then gcc wrongly adds */
- /* float load/store to inner loops ruining performance and code size */
- uint64_t uxi = ux.i;
-
- if (uy.i<<1 == 0 || isnan(y) || ex == 0x7ff)
- return (x*y)/(x*y);
- if (uxi<<1 <= uy.i<<1) {
- if (uxi<<1 == uy.i<<1)
- return 0*x;
- return x;
- }
-
- /* normalize x and y */
- if (!ex) {
- for (i = uxi<<12; i>>63 == 0; ex--, i <<= 1);
- uxi <<= -ex + 1;
- } else {
- uxi &= -1ULL >> 12;
- uxi |= 1ULL << 52;
- }
- if (!ey) {
- for (i = uy.i<<12; i>>63 == 0; ey--, i <<= 1);
- uy.i <<= -ey + 1;
- } else {
- uy.i &= -1ULL >> 12;
- uy.i |= 1ULL << 52;
- }
-
- /* x mod y */
- for (; ex > ey; ex--) {
- i = uxi - uy.i;
- if (i >> 63 == 0) {
- if (i == 0)
- return 0*x;
- uxi = i;
- }
- uxi <<= 1;
- }
- i = uxi - uy.i;
- if (i >> 63 == 0) {
- if (i == 0)
- return 0*x;
- uxi = i;
- }
- for (; uxi>>52 == 0; uxi <<= 1, ex--);
-
- /* scale result */
- if (ex > 0) {
- uxi -= 1ULL << 52;
- uxi |= (uint64_t)ex << 52;
- } else {
- uxi >>= -ex + 1;
- }
- uxi |= (uint64_t)sx << 63;
- ux.i = uxi;
- return ux.f;
-}