| #ifndef _MATH_PRIVATE_H_ |
| #error "Never use <math_ldbl.h> directly; include <math_private.h> instead." |
| #endif |
| |
| /* A union which permits us to convert between a long double and |
| four 32 bit ints or two 64 bit ints. */ |
| |
| #if __FLOAT_WORD_ORDER == BIG_ENDIAN |
| |
| typedef union |
| { |
| long double value; |
| struct |
| { |
| u_int64_t msw; |
| u_int64_t lsw; |
| } parts64; |
| struct |
| { |
| u_int32_t w0, w1, w2, w3; |
| } parts32; |
| } ieee854_long_double_shape_type; |
| |
| #endif |
| |
| #if __FLOAT_WORD_ORDER == LITTLE_ENDIAN |
| |
| typedef union |
| { |
| long double value; |
| struct |
| { |
| u_int64_t lsw; |
| u_int64_t msw; |
| } parts64; |
| struct |
| { |
| u_int32_t w3, w2, w1, w0; |
| } parts32; |
| } ieee854_long_double_shape_type; |
| |
| #endif |
| |
| /* Get two 64 bit ints from a long double. */ |
| |
| #define GET_LDOUBLE_WORDS64(ix0,ix1,d) \ |
| do { \ |
| ieee854_long_double_shape_type qw_u; \ |
| qw_u.value = (d); \ |
| (ix0) = qw_u.parts64.msw; \ |
| (ix1) = qw_u.parts64.lsw; \ |
| } while (0) |
| |
| /* Set a long double from two 64 bit ints. */ |
| |
| #define SET_LDOUBLE_WORDS64(d,ix0,ix1) \ |
| do { \ |
| ieee854_long_double_shape_type qw_u; \ |
| qw_u.parts64.msw = (ix0); \ |
| qw_u.parts64.lsw = (ix1); \ |
| (d) = qw_u.value; \ |
| } while (0) |
| |
| /* Get the more significant 64 bits of a long double mantissa. */ |
| |
| #define GET_LDOUBLE_MSW64(v,d) \ |
| do { \ |
| ieee854_long_double_shape_type sh_u; \ |
| sh_u.value = (d); \ |
| (v) = sh_u.parts64.msw; \ |
| } while (0) |
| |
| /* Set the more significant 64 bits of a long double mantissa from an int. */ |
| |
| #define SET_LDOUBLE_MSW64(d,v) \ |
| do { \ |
| ieee854_long_double_shape_type sh_u; \ |
| sh_u.value = (d); \ |
| sh_u.parts64.msw = (v); \ |
| (d) = sh_u.value; \ |
| } while (0) |
| |
| /* Get the least significant 64 bits of a long double mantissa. */ |
| |
| #define GET_LDOUBLE_LSW64(v,d) \ |
| do { \ |
| ieee854_long_double_shape_type sh_u; \ |
| sh_u.value = (d); \ |
| (v) = sh_u.parts64.lsw; \ |
| } while (0) |