summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/math/scalbn.c18
-rw-r--r--src/math/scalbnf.c18
2 files changed, 20 insertions, 16 deletions
diff --git a/src/math/scalbn.c b/src/math/scalbn.c
index 1fec432f..530e07c7 100644
--- a/src/math/scalbn.c
+++ b/src/math/scalbn.c
@@ -1,29 +1,31 @@
-#include "libm.h"
+#include <math.h>
+#include <stdint.h>
double scalbn(double x, int n)
{
- double scale;
+ union {double f; uint64_t i;} u;
+ double_t y = x;
if (n > 1023) {
- x *= 0x1p1023;
+ y *= 0x1p1023;
n -= 1023;
if (n > 1023) {
- x *= 0x1p1023;
+ y *= 0x1p1023;
n -= 1023;
if (n > 1023)
n = 1023;
}
} else if (n < -1022) {
- x *= 0x1p-1022;
+ y *= 0x1p-1022;
n += 1022;
if (n < -1022) {
- x *= 0x1p-1022;
+ y *= 0x1p-1022;
n += 1022;
if (n < -1022)
n = -1022;
}
}
- INSERT_WORDS(scale, (uint32_t)(0x3ff+n)<<20, 0);
- STRICT_ASSIGN(double, x, x * scale);
+ u.i = (uint64_t)(0x3ff+n)<<52;
+ x = y * u.f;
return x;
}
diff --git a/src/math/scalbnf.c b/src/math/scalbnf.c
index c0eeaf84..0b62c3c7 100644
--- a/src/math/scalbnf.c
+++ b/src/math/scalbnf.c
@@ -1,29 +1,31 @@
-#include "libm.h"
+#include <math.h>
+#include <stdint.h>
float scalbnf(float x, int n)
{
- float scale;
+ union {float f; uint32_t i;} u;
+ float_t y = x;
if (n > 127) {
- x *= 0x1p127f;
+ y *= 0x1p127f;
n -= 127;
if (n > 127) {
- x *= 0x1p127f;
+ y *= 0x1p127f;
n -= 127;
if (n > 127)
n = 127;
}
} else if (n < -126) {
- x *= 0x1p-126f;
+ y *= 0x1p-126f;
n += 126;
if (n < -126) {
- x *= 0x1p-126f;
+ y *= 0x1p-126f;
n += 126;
if (n < -126)
n = -126;
}
}
- SET_FLOAT_WORD(scale, (uint32_t)(0x7f+n)<<23);
- STRICT_ASSIGN(float, x, x * scale);
+ u.i = (uint32_t)(0x7f+n)<<23;
+ x = y * u.f;
return x;
}