aboutsummaryrefslogtreecommitdiff
path: root/lib/mlibc/options/ansi/musl-generic-math/fmodf.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/mlibc/options/ansi/musl-generic-math/fmodf.c')
-rw-r--r--lib/mlibc/options/ansi/musl-generic-math/fmodf.c65
1 files changed, 0 insertions, 65 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/fmodf.c b/lib/mlibc/options/ansi/musl-generic-math/fmodf.c
deleted file mode 100644
index ff58f93..0000000
--- a/lib/mlibc/options/ansi/musl-generic-math/fmodf.c
+++ /dev/null
@@ -1,65 +0,0 @@
-#include <math.h>
-#include <stdint.h>
-
-float fmodf(float x, float y)
-{
- union {float f; uint32_t i;} ux = {x}, uy = {y};
- int ex = ux.i>>23 & 0xff;
- int ey = uy.i>>23 & 0xff;
- uint32_t sx = ux.i & 0x80000000;
- uint32_t i;
- uint32_t uxi = ux.i;
-
- if (uy.i<<1 == 0 || isnan(y) || ex == 0xff)
- 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<<9; i>>31 == 0; ex--, i <<= 1);
- uxi <<= -ex + 1;
- } else {
- uxi &= -1U >> 9;
- uxi |= 1U << 23;
- }
- if (!ey) {
- for (i = uy.i<<9; i>>31 == 0; ey--, i <<= 1);
- uy.i <<= -ey + 1;
- } else {
- uy.i &= -1U >> 9;
- uy.i |= 1U << 23;
- }
-
- /* x mod y */
- for (; ex > ey; ex--) {
- i = uxi - uy.i;
- if (i >> 31 == 0) {
- if (i == 0)
- return 0*x;
- uxi = i;
- }
- uxi <<= 1;
- }
- i = uxi - uy.i;
- if (i >> 31 == 0) {
- if (i == 0)
- return 0*x;
- uxi = i;
- }
- for (; uxi>>23 == 0; uxi <<= 1, ex--);
-
- /* scale result up */
- if (ex > 0) {
- uxi -= 1U << 23;
- uxi |= (uint32_t)ex << 23;
- } else {
- uxi >>= -ex + 1;
- }
- uxi |= sx;
- ux.i = uxi;
- return ux.f;
-}