From 18f02c42a2b5397e8541f4663eb6ca00c1a806dd Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 14 Jun 2018 11:00:58 -0400 Subject: 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. --- src/internal/libm.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'src/internal') 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; -- cgit v1.2.1