diff options
Diffstat (limited to 'gcc/doc/extend.texi')
| -rw-r--r-- | gcc/doc/extend.texi | 37 |
1 files changed, 30 insertions, 7 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 27363fc..b6244a0 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -1,4 +1,4 @@ -@c Copyright (C) 1988-2017 Free Software Foundation, Inc. +c Copyright (C) 1988-2017 Free Software Foundation, Inc. @c This is part of the GCC manual. @c For copying conditions, see the file gcc.texi. @@ -15229,13 +15229,21 @@ long long __builtin_darn_raw (void); int __builtin_darn_32 (void); unsigned int scalar_extract_exp (double source); +unsigned long long int scalar_extract_exp (__ieee128 source); + unsigned long long int scalar_extract_sig (double source); +unsigned __int128 scalar_extract_sig (__ieee128 source); double scalar_insert_exp (unsigned long long int significand, unsigned long long int exponent); double scalar_insert_exp (double significand, unsigned long long int exponent); +ieee_128 +scalar_insert_exp (unsigned __int128 significand, unsigned long long int exponent); +ieee_128 +scalar_insert_exp (ieee_128 significand, unsigned long long int exponent); + int scalar_cmp_exp_gt (double arg1, double arg2); int scalar_cmp_exp_lt (double arg1, double arg2); int scalar_cmp_exp_eq (double arg1, double arg2); @@ -15243,9 +15251,11 @@ int scalar_cmp_exp_unordered (double arg1, double arg2); bool scalar_test_data_class (float source, const int condition); bool scalar_test_data_class (double source, const int condition); +bool scalar_test_data_class (__ieee128 source, const int condition); bool scalar_test_neg (float source); bool scalar_test_neg (double source); +bool scalar_test_neg (__ieee128 source); int __builtin_byte_in_set (unsigned char u, unsigned long long set); int __builtin_byte_in_range (unsigned char u, unsigned int range); @@ -15285,25 +15295,38 @@ functions require a 64-bit environment supporting ISA 3.0 or later. The @code{scalar_extract_exp} and @code{scalar_extract_sig} built-in functions return the significand and the biased exponent value respectively of their @code{source} arguments. -Within the result returned by @code{scalar_extract_sig}, -the @code{0x10000000000000} bit is set if the +When supplied with a 64-bit @code{source} argument, the +result returned by @code{scalar_extract_sig} has +the @code{0x0010000000000000} bit set if the function's @code{source} argument is in normalized form. Otherwise, this bit is set to 0. +When supplied with a 128-bit @code{source} argument, the +@code{0x00010000000000000000000000000000} bit of the result is +treated similarly. Note that the sign of the significand is not represented in the result returned from the @code{scalar_extract_sig} function. Use the @code{scalar_test_neg} function to test the sign of its @code{double} argument. -The @code{scalar_insert_exp} -function requires a 64-bit environment supporting ISA 3.0 or later. -The @code{scalar_insert_exp} built-in function returns a double-precision +The @code{scalar_insert_exp} +functions require a 64-bit environment supporting ISA 3.0 or later. +When supplied with a 64-bit first argument, the +@code{scalar_insert_exp} built-in function returns a double-precision floating point value that is constructed by assembling the values of its @code{significand} and @code{exponent} arguments. The sign of the result is copied from the most significant bit of the @code{significand} argument. The significand and exponent components of the result are composed of the least significant 11 bits of the @code{exponent} argument and the least significant 52 bits of the -@code{significand} argument. +@code{significand} argument respectively. + +When supplied with a 128-bit first argument, the +@code{scalar_insert_exp} built-in function returns a quad-precision +ieee floating point value. The sign bit of the result is copied from +the most significant bit of the @code{significand} argument. +The significand and exponent components of the result are composed of +the least significant 15 bits of the @code{exponent} argument and the +least significant 112 bits of the @code{significand} argument respectively. The @code{scalar_cmp_exp_gt}, @code{scalar_cmp_exp_lt}, @code{scalar_cmp_exp_eq}, and @code{scalar_cmp_exp_unordered} built-in |