about summary refs log tree commit diff
path: root/src/internal/libm.h
diff options
context:
space:
mode:
authorSzabolcs Nagy <nsz@port70.net>2013-09-02 00:38:51 +0000
committerSzabolcs Nagy <nsz@port70.net>2013-09-05 11:30:07 +0000
commitaf5f6d9556441487e5c66a7a4cfeddf4ed354aa7 (patch)
tree34a31a68753c2851628109713a3462cb4742ef44 /src/internal/libm.h
parentff4d6020d1c8aaab4f05e561789d6dad3d7ef083 (diff)
downloadmusl-af5f6d9556441487e5c66a7a4cfeddf4ed354aa7.tar.gz
musl-af5f6d9556441487e5c66a7a4cfeddf4ed354aa7.tar.xz
musl-af5f6d9556441487e5c66a7a4cfeddf4ed354aa7.zip
long double cleanup, initial commit
new ldshape union, ld128 support is kept, code that used the old
ldshape union was rewritten (IEEEl2bits union of freebsd libm is
not touched yet)

ld80 __fpclassifyl no longer tries to handle invalid representation
Diffstat (limited to 'src/internal/libm.h')
-rw-r--r--src/internal/libm.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/internal/libm.h b/src/internal/libm.h
index 64cc8388..52ac61ec 100644
--- a/src/internal/libm.h
+++ b/src/internal/libm.h
@@ -17,6 +17,7 @@
 #include <float.h>
 #include <math.h>
 #include <complex.h>
+#include <endian.h>
 
 #include "longdbl.h"
 
@@ -32,6 +33,33 @@ union dshape {
 	uint64_t bits;
 };
 
+#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
+#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
+union ldshape {
+	long double f;
+	struct {
+		uint64_t m;
+		uint16_t se;
+	} i;
+};
+#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
+union ldshape {
+	long double f;
+	struct {
+		uint64_t lo;
+		uint32_t mid;
+		uint16_t top;
+		uint16_t se;
+	} i;
+	struct {
+		uint64_t lo;
+		uint64_t hi;
+	} i2;
+};
+#else
+#error Unsupported long double representation
+#endif
+
 #define FORCE_EVAL(x) do {                          \
 	if (sizeof(x) == sizeof(float)) {           \
 		volatile float __x;                 \