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authorRich Felker <dalias@aerifal.cx>2018-06-14 11:00:58 -0400
committerRich Felker <dalias@aerifal.cx>2018-06-14 13:59:41 -0400
commit18f02c42a2b5397e8541f4663eb6ca00c1a806dd (patch)
tree88299f2477ca68b54ef6a5b5051bb56b79a51d9d /src/internal
parentd5e55ba3320c30310ca1d8938925d5424a652422 (diff)
downloadmusl-18f02c42a2b5397e8541f4663eb6ca00c1a806dd.tar.gz
add support for m68k 80-bit long double variant
since x86 and m68k are the only archs with 80-bit long double and each has mandatory endianness, select the variant via endianness. differences are minor: apparently just byte order and representation of infinities. the m68k format is not well-documented anywhere I could find, so if other differences are found they may require additional changes later.
Diffstat (limited to 'src/internal')
-rw-r--r--src/internal/libm.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/internal/libm.h b/src/internal/libm.h
index df864111..a2505f7e 100644
--- a/src/internal/libm.h
+++ b/src/internal/libm.h
@@ -28,6 +28,17 @@ union ldshape {
uint16_t se;
} i;
};
+#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __BIG_ENDIAN
+/* This is the m68k variant of 80-bit long double, and this definition only works
+ * on archs where the alignment requirement of uint64_t is <= 4. */
+union ldshape {
+ long double f;
+ struct {
+ uint16_t se;
+ uint16_t pad;
+ uint64_t m;
+ } i;
+};
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
union ldshape {
long double f;