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LibM: Specialiase FloatExtractor for long double as well

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Mițca Dumitru 2021-03-07 20:36:08 +02:00 • committed by Andreas Kling
parent a13f2b7df3
commit 190952675e
1 changed files with 20 additions and 0 deletions
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20
Userland/Libraries/LibM/math.cpp
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@ -24,6 +24,8 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/ */
#include <AK/Platform.h>
#include <AK/StdLibExtras.h>
#include <LibC/assert.h> #include <LibC/assert.h>
#include <math.h> #include <math.h>
#include <stdint.h> #include <stdint.h>
@ -67,6 +69,24 @@ enum class RoundingMode {
template<typename T> template<typename T>
union FloatExtractor; union FloatExtractor;
#if ARCH(I386) || ARCH(X86_64)
// This assumes long double is 80 bits, which is true with GCC on Intel platforms
template<>
union FloatExtractor<long double> {
static const int mantissa_bits = 64;
static const unsigned long long mantissa_max = ~0u;
static const int exponent_bias = 16383;
static const int exponent_bits = 15;
static const unsigned exponent_max = 32767;
struct {
unsigned long long mantissa;
unsigned exponent : 15;
unsigned sign : 1;
};
long double d;
};
#endif
template<> template<>
union FloatExtractor<double> { union FloatExtractor<double> {
static const int mantissa_bits = 52; static const int mantissa_bits = 52;