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diff --git a/gcc-4.2.1-5666.3/gcc/doc/libgcc.texi b/gcc-4.2.1-5666.3/gcc/doc/libgcc.texi deleted file mode 100644 index b7b1cdef0..000000000 --- a/gcc-4.2.1-5666.3/gcc/doc/libgcc.texi +++ /dev/null @@ -1,736 +0,0 @@ -@c Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. -@c This is part of the GCC manual. -@c For copying conditions, see the file gcc.texi. -@c Contributed by Aldy Hernandez <aldy@quesejoda.com> - -@node Libgcc -@chapter The GCC low-level runtime library - -GCC provides a low-level runtime library, @file{libgcc.a} or -@file{libgcc_s.so.1} on some platforms. GCC generates calls to -routines in this library automatically, whenever it needs to perform -some operation that is too complicated to emit inline code for. - -Most of the routines in @code{libgcc} handle arithmetic operations -that the target processor cannot perform directly. This includes -integer multiply and divide on some machines, and all floating-point -operations on other machines. @code{libgcc} also includes routines -for exception handling, and a handful of miscellaneous operations. - -Some of these routines can be defined in mostly machine-independent C@. -Others must be hand-written in assembly language for each processor -that needs them. - -GCC will also generate calls to C library routines, such as -@code{memcpy} and @code{memset}, in some cases. The set of routines -that GCC may possibly use is documented in @ref{Other -Builtins,,,gcc, Using the GNU Compiler Collection (GCC)}. - -These routines take arguments and return values of a specific machine -mode, not a specific C type. @xref{Machine Modes}, for an explanation -of this concept. For illustrative purposes, in this chapter the -floating point type @code{float} is assumed to correspond to @code{SFmode}; -@code{double} to @code{DFmode}; and @code{@w{long double}} to both -@code{TFmode} and @code{XFmode}. Similarly, the integer types @code{int} -and @code{@w{unsigned int}} correspond to @code{SImode}; @code{long} and -@code{@w{unsigned long}} to @code{DImode}; and @code{@w{long long}} and -@code{@w{unsigned long long}} to @code{TImode}. - -@menu -* Integer library routines:: -* Soft float library routines:: -* Decimal float library routines:: -* Exception handling routines:: -* Miscellaneous routines:: -@end menu - -@node Integer library routines -@section Routines for integer arithmetic - -The integer arithmetic routines are used on platforms that don't provide -hardware support for arithmetic operations on some modes. - -@subsection Arithmetic functions - -@deftypefn {Runtime Function} int __ashlsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __ashldi3 (long @var{a}, int @var{b}) -@deftypefnx {Runtime Function} {long long} __ashlti3 (long long @var{a}, int @var{b}) -These functions return the result of shifting @var{a} left by @var{b} bits. -@end deftypefn - -@deftypefn {Runtime Function} int __ashrsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __ashrdi3 (long @var{a}, int @var{b}) -@deftypefnx {Runtime Function} {long long} __ashrti3 (long long @var{a}, int @var{b}) -These functions return the result of arithmetically shifting @var{a} right -by @var{b} bits. -@end deftypefn - -@deftypefn {Runtime Function} int __divsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __divdi3 (long @var{a}, long @var{b}) -@deftypefnx {Runtime Function} {long long} __divti3 (long long @var{a}, long long @var{b}) -These functions return the quotient of the signed division of @var{a} and -@var{b}. -@end deftypefn - -@deftypefn {Runtime Function} int __lshrsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __lshrdi3 (long @var{a}, int @var{b}) -@deftypefnx {Runtime Function} {long long} __lshrti3 (long long @var{a}, int @var{b}) -These functions return the result of logically shifting @var{a} right by -@var{b} bits. -@end deftypefn - -@deftypefn {Runtime Function} int __modsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __moddi3 (long @var{a}, long @var{b}) -@deftypefnx {Runtime Function} {long long} __modti3 (long long @var{a}, long long @var{b}) -These functions return the remainder of the signed division of @var{a} -and @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} int __mulsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __muldi3 (long @var{a}, long @var{b}) -@deftypefnx {Runtime Function} {long long} __multi3 (long long @var{a}, long long @var{b}) -These functions return the product of @var{a} and @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} long __negdi2 (long @var{a}) -@deftypefnx {Runtime Function} {long long} __negti2 (long long @var{a}) -These functions return the negation of @var{a}. -@end deftypefn - -@deftypefn {Runtime Function} {unsigned int} __udivsi3 (unsigned int @var{a}, unsigned int @var{b}) -@deftypefnx {Runtime Function} {unsigned long} __udivdi3 (unsigned long @var{a}, unsigned long @var{b}) -@deftypefnx {Runtime Function} {unsigned long long} __udivti3 (unsigned long long @var{a}, unsigned long long @var{b}) -These functions return the quotient of the unsigned division of @var{a} -and @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} {unsigned long} __udivmoddi3 (unsigned long @var{a}, unsigned long @var{b}, unsigned long *@var{c}) -@deftypefnx {Runtime Function} {unsigned long long} __udivti3 (unsigned long long @var{a}, unsigned long long @var{b}, unsigned long long *@var{c}) -These functions calculate both the quotient and remainder of the unsigned -division of @var{a} and @var{b}. The return value is the quotient, and -the remainder is placed in variable pointed to by @var{c}. -@end deftypefn - -@deftypefn {Runtime Function} {unsigned int} __umodsi3 (unsigned int @var{a}, unsigned int @var{b}) -@deftypefnx {Runtime Function} {unsigned long} __umoddi3 (unsigned long @var{a}, unsigned long @var{b}) -@deftypefnx {Runtime Function} {unsigned long long} __umodti3 (unsigned long long @var{a}, unsigned long long @var{b}) -These functions return the remainder of the unsigned division of @var{a} -and @var{b}. -@end deftypefn - -@subsection Comparison functions - -The following functions implement integral comparisons. These functions -implement a low-level compare, upon which the higher level comparison -operators (such as less than and greater than or equal to) can be -constructed. The returned values lie in the range zero to two, to allow -the high-level operators to be implemented by testing the returned -result using either signed or unsigned comparison. - -@deftypefn {Runtime Function} int __cmpdi2 (long @var{a}, long @var{b}) -@deftypefnx {Runtime Function} int __cmpti2 (long long @var{a}, long long @var{b}) -These functions perform a signed comparison of @var{a} and @var{b}. If -@var{a} is less than @var{b}, they return 0; if @var{a} is greater than -@var{b}, they return 2; and if @var{a} and @var{b} are equal they return 1. -@end deftypefn - -@deftypefn {Runtime Function} int __ucmpdi2 (unsigned long @var{a}, unsigned long @var{b}) -@deftypefnx {Runtime Function} int __ucmpti2 (unsigned long long @var{a}, unsigned long long @var{b}) -These functions perform an unsigned comparison of @var{a} and @var{b}. -If @var{a} is less than @var{b}, they return 0; if @var{a} is greater than -@var{b}, they return 2; and if @var{a} and @var{b} are equal they return 1. -@end deftypefn - -@subsection Trapping arithmetic functions - -The following functions implement trapping arithmetic. These functions -call the libc function @code{abort} upon signed arithmetic overflow. - -@deftypefn {Runtime Function} int __absvsi2 (int @var{a}) -@deftypefnx {Runtime Function} long __absvdi2 (long @var{a}) -These functions return the absolute value of @var{a}. -@end deftypefn - -@deftypefn {Runtime Function} int __addvsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __addvdi3 (long @var{a}, long @var{b}) -These functions return the sum of @var{a} and @var{b}; that is -@code{@var{a} + @var{b}}. -@end deftypefn - -@deftypefn {Runtime Function} int __mulvsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __mulvdi3 (long @var{a}, long @var{b}) -The functions return the product of @var{a} and @var{b}; that is -@code{@var{a} * @var{b}}. -@end deftypefn - -@deftypefn {Runtime Function} int __negvsi2 (int @var{a}) -@deftypefnx {Runtime Function} long __negvdi2 (long @var{a}) -These functions return the negation of @var{a}; that is @code{-@var{a}}. -@end deftypefn - -@deftypefn {Runtime Function} int __subvsi3 (int @var{a}, int @var{b}) -@deftypefnx {Runtime Function} long __subvdi3 (long @var{a}, long @var{b}) -These functions return the difference between @var{b} and @var{a}; -that is @code{@var{a} - @var{b}}. -@end deftypefn - -@subsection Bit operations - -@deftypefn {Runtime Function} int __clzsi2 (int @var{a}) -@deftypefnx {Runtime Function} int __clzdi2 (long @var{a}) -@deftypefnx {Runtime Function} int __clzti2 (long long @var{a}) -These functions return the number of leading 0-bits in @var{a}, starting -at the most significant bit position. If @var{a} is zero, the result is -undefined. -@end deftypefn - -@deftypefn {Runtime Function} int __ctzsi2 (int @var{a}) -@deftypefnx {Runtime Function} int __ctzdi2 (long @var{a}) -@deftypefnx {Runtime Function} int __ctzti2 (long long @var{a}) -These functions return the number of trailing 0-bits in @var{a}, starting -at the least significant bit position. If @var{a} is zero, the result is -undefined. -@end deftypefn - -@deftypefn {Runtime Function} int __ffsdi2 (long @var{a}) -@deftypefnx {Runtime Function} int __ffsti2 (long long @var{a}) -These functions return the index of the least significant 1-bit in @var{a}, -or the value zero if @var{a} is zero. The least significant bit is index -one. -@end deftypefn - -@deftypefn {Runtime Function} int __paritysi2 (int @var{a}) -@deftypefnx {Runtime Function} int __paritydi2 (long @var{a}) -@deftypefnx {Runtime Function} int __parityti2 (long long @var{a}) -These functions return the value zero if the number of bits set in -@var{a} is even, and the value one otherwise. -@end deftypefn - -@deftypefn {Runtime Function} int __popcountsi2 (int @var{a}) -@deftypefnx {Runtime Function} int __popcountdi2 (long @var{a}) -@deftypefnx {Runtime Function} int __popcountti2 (long long @var{a}) -These functions return the number of bits set in @var{a}. -@end deftypefn -@c APPLE LOCAL begin mainline bswap -@deftypefn {Runtime Function} int32_t __bswapsi2 (int32_t @var{a}) -@deftypefnx {Runtime Function} int64_t __bswapdi2 (int64_t @var{a}) -These functions return the @var{a} byteswapped. -@end deftypefn -@c APPLE LOCAL end mainline bswap - -@node Soft float library routines -@section Routines for floating point emulation -@cindex soft float library -@cindex arithmetic library -@cindex math library -@opindex msoft-float - -The software floating point library is used on machines which do not -have hardware support for floating point. It is also used whenever -@option{-msoft-float} is used to disable generation of floating point -instructions. (Not all targets support this switch.) - -For compatibility with other compilers, the floating point emulation -routines can be renamed with the @code{DECLARE_LIBRARY_RENAMES} macro -(@pxref{Library Calls}). In this section, the default names are used. - -Presently the library does not support @code{XFmode}, which is used -for @code{long double} on some architectures. - -@subsection Arithmetic functions - -@deftypefn {Runtime Function} float __addsf3 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} double __adddf3 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} {long double} __addtf3 (long double @var{a}, long double @var{b}) -@deftypefnx {Runtime Function} {long double} __addxf3 (long double @var{a}, long double @var{b}) -These functions return the sum of @var{a} and @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} float __subsf3 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} double __subdf3 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} {long double} __subtf3 (long double @var{a}, long double @var{b}) -@deftypefnx {Runtime Function} {long double} __subxf3 (long double @var{a}, long double @var{b}) -These functions return the difference between @var{b} and @var{a}; -that is, @w{@math{@var{a} - @var{b}}}. -@end deftypefn - -@deftypefn {Runtime Function} float __mulsf3 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} double __muldf3 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} {long double} __multf3 (long double @var{a}, long double @var{b}) -@deftypefnx {Runtime Function} {long double} __mulxf3 (long double @var{a}, long double @var{b}) -These functions return the product of @var{a} and @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} float __divsf3 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} double __divdf3 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} {long double} __divtf3 (long double @var{a}, long double @var{b}) -@deftypefnx {Runtime Function} {long double} __divxf3 (long double @var{a}, long double @var{b}) -These functions return the quotient of @var{a} and @var{b}; that is, -@w{@math{@var{a} / @var{b}}}. -@end deftypefn - -@deftypefn {Runtime Function} float __negsf2 (float @var{a}) -@deftypefnx {Runtime Function} double __negdf2 (double @var{a}) -@deftypefnx {Runtime Function} {long double} __negtf2 (long double @var{a}) -@deftypefnx {Runtime Function} {long double} __negxf2 (long double @var{a}) -These functions return the negation of @var{a}. They simply flip the -sign bit, so they can produce negative zero and negative NaN@. -@end deftypefn - -@subsection Conversion functions - -@deftypefn {Runtime Function} double __extendsfdf2 (float @var{a}) -@deftypefnx {Runtime Function} {long double} __extendsftf2 (float @var{a}) -@deftypefnx {Runtime Function} {long double} __extendsfxf2 (float @var{a}) -@deftypefnx {Runtime Function} {long double} __extenddftf2 (double @var{a}) -@deftypefnx {Runtime Function} {long double} __extenddfxf2 (double @var{a}) -These functions extend @var{a} to the wider mode of their return -type. -@end deftypefn - -@deftypefn {Runtime Function} double __truncxfdf2 (long double @var{a}) -@deftypefnx {Runtime Function} double __trunctfdf2 (long double @var{a}) -@deftypefnx {Runtime Function} float __truncxfsf2 (long double @var{a}) -@deftypefnx {Runtime Function} float __trunctfsf2 (long double @var{a}) -@deftypefnx {Runtime Function} float __truncdfsf2 (double @var{a}) -These functions truncate @var{a} to the narrower mode of their return -type, rounding toward zero. -@end deftypefn - -@deftypefn {Runtime Function} int __fixsfsi (float @var{a}) -@deftypefnx {Runtime Function} int __fixdfsi (double @var{a}) -@deftypefnx {Runtime Function} int __fixtfsi (long double @var{a}) -@deftypefnx {Runtime Function} int __fixxfsi (long double @var{a}) -These functions convert @var{a} to a signed integer, rounding toward zero. -@end deftypefn - -@deftypefn {Runtime Function} long __fixsfdi (float @var{a}) -@deftypefnx {Runtime Function} long __fixdfdi (double @var{a}) -@deftypefnx {Runtime Function} long __fixtfdi (long double @var{a}) -@deftypefnx {Runtime Function} long __fixxfdi (long double @var{a}) -These functions convert @var{a} to a signed long, rounding toward zero. -@end deftypefn - -@deftypefn {Runtime Function} {long long} __fixsfti (float @var{a}) -@deftypefnx {Runtime Function} {long long} __fixdfti (double @var{a}) -@deftypefnx {Runtime Function} {long long} __fixtfti (long double @var{a}) -@deftypefnx {Runtime Function} {long long} __fixxfti (long double @var{a}) -These functions convert @var{a} to a signed long long, rounding toward zero. -@end deftypefn - -@deftypefn {Runtime Function} {unsigned int} __fixunssfsi (float @var{a}) -@deftypefnx {Runtime Function} {unsigned int} __fixunsdfsi (double @var{a}) -@deftypefnx {Runtime Function} {unsigned int} __fixunstfsi (long double @var{a}) -@deftypefnx {Runtime Function} {unsigned int} __fixunsxfsi (long double @var{a}) -These functions convert @var{a} to an unsigned integer, rounding -toward zero. Negative values all become zero. -@end deftypefn - -@deftypefn {Runtime Function} {unsigned long} __fixunssfdi (float @var{a}) -@deftypefnx {Runtime Function} {unsigned long} __fixunsdfdi (double @var{a}) -@deftypefnx {Runtime Function} {unsigned long} __fixunstfdi (long double @var{a}) -@deftypefnx {Runtime Function} {unsigned long} __fixunsxfdi (long double @var{a}) -These functions convert @var{a} to an unsigned long, rounding -toward zero. Negative values all become zero. -@end deftypefn - -@deftypefn {Runtime Function} {unsigned long long} __fixunssfti (float @var{a}) -@deftypefnx {Runtime Function} {unsigned long long} __fixunsdfti (double @var{a}) -@deftypefnx {Runtime Function} {unsigned long long} __fixunstfti (long double @var{a}) -@deftypefnx {Runtime Function} {unsigned long long} __fixunsxfti (long double @var{a}) -These functions convert @var{a} to an unsigned long long, rounding -toward zero. Negative values all become zero. -@end deftypefn - -@deftypefn {Runtime Function} float __floatsisf (int @var{i}) -@deftypefnx {Runtime Function} double __floatsidf (int @var{i}) -@deftypefnx {Runtime Function} {long double} __floatsitf (int @var{i}) -@deftypefnx {Runtime Function} {long double} __floatsixf (int @var{i}) -These functions convert @var{i}, a signed integer, to floating point. -@end deftypefn - -@deftypefn {Runtime Function} float __floatdisf (long @var{i}) -@deftypefnx {Runtime Function} double __floatdidf (long @var{i}) -@deftypefnx {Runtime Function} {long double} __floatditf (long @var{i}) -@deftypefnx {Runtime Function} {long double} __floatdixf (long @var{i}) -These functions convert @var{i}, a signed long, to floating point. -@end deftypefn - -@deftypefn {Runtime Function} float __floattisf (long long @var{i}) -@deftypefnx {Runtime Function} double __floattidf (long long @var{i}) -@deftypefnx {Runtime Function} {long double} __floattitf (long long @var{i}) -@deftypefnx {Runtime Function} {long double} __floattixf (long long @var{i}) -These functions convert @var{i}, a signed long long, to floating point. -@end deftypefn - -@deftypefn {Runtime Function} float __floatunsisf (unsigned int @var{i}) -@deftypefnx {Runtime Function} double __floatunsidf (unsigned int @var{i}) -@deftypefnx {Runtime Function} {long double} __floatunsitf (unsigned int @var{i}) -@deftypefnx {Runtime Function} {long double} __floatunsixf (unsigned int @var{i}) -These functions convert @var{i}, an unsigned integer, to floating point. -@end deftypefn - -@deftypefn {Runtime Function} float __floatundisf (unsigned long @var{i}) -@deftypefnx {Runtime Function} double __floatundidf (unsigned long @var{i}) -@deftypefnx {Runtime Function} {long double} __floatunditf (unsigned long @var{i}) -@deftypefnx {Runtime Function} {long double} __floatundixf (unsigned long @var{i}) -These functions convert @var{i}, an unsigned long, to floating point. -@end deftypefn - -@deftypefn {Runtime Function} float __floatuntisf (unsigned long long @var{i}) -@deftypefnx {Runtime Function} double __floatuntidf (unsigned long long @var{i}) -@deftypefnx {Runtime Function} {long double} __floatuntitf (unsigned long long @var{i}) -@deftypefnx {Runtime Function} {long double} __floatuntixf (unsigned long long @var{i}) -These functions convert @var{i}, an unsigned long long, to floating point. -@end deftypefn - -@subsection Comparison functions - -There are two sets of basic comparison functions. - -@deftypefn {Runtime Function} int __cmpsf2 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} int __cmpdf2 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} int __cmptf2 (long double @var{a}, long double @var{b}) -These functions calculate @math{a <=> b}. That is, if @var{a} is less -than @var{b}, they return @minus{}1; if @var{a} is greater than @var{b}, they -return 1; and if @var{a} and @var{b} are equal they return 0. If -either argument is NaN they return 1, but you should not rely on this; -if NaN is a possibility, use one of the higher-level comparison -functions. -@end deftypefn - -@deftypefn {Runtime Function} int __unordsf2 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} int __unorddf2 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} int __unordtf2 (long double @var{a}, long double @var{b}) -These functions return a nonzero value if either argument is NaN, otherwise 0. -@end deftypefn - -There is also a complete group of higher level functions which -correspond directly to comparison operators. They implement the ISO C -semantics for floating-point comparisons, taking NaN into account. -Pay careful attention to the return values defined for each set. -Under the hood, all of these routines are implemented as - -@smallexample - if (__unord@var{X}f2 (a, b)) - return @var{E}; - return __cmp@var{X}f2 (a, b); -@end smallexample - -@noindent -where @var{E} is a constant chosen to give the proper behavior for -NaN@. Thus, the meaning of the return value is different for each set. -Do not rely on this implementation; only the semantics documented -below are guaranteed. - -@deftypefn {Runtime Function} int __eqsf2 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} int __eqdf2 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} int __eqtf2 (long double @var{a}, long double @var{b}) -These functions return zero if neither argument is NaN, and @var{a} and -@var{b} are equal. -@end deftypefn - -@deftypefn {Runtime Function} int __nesf2 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} int __nedf2 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} int __netf2 (long double @var{a}, long double @var{b}) -These functions return a nonzero value if either argument is NaN, or -if @var{a} and @var{b} are unequal. -@end deftypefn - -@deftypefn {Runtime Function} int __gesf2 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} int __gedf2 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} int __getf2 (long double @var{a}, long double @var{b}) -These functions return a value greater than or equal to zero if -neither argument is NaN, and @var{a} is greater than or equal to -@var{b}. -@end deftypefn - -@deftypefn {Runtime Function} int __ltsf2 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} int __ltdf2 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} int __lttf2 (long double @var{a}, long double @var{b}) -These functions return a value less than zero if neither argument is -NaN, and @var{a} is strictly less than @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} int __lesf2 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} int __ledf2 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} int __letf2 (long double @var{a}, long double @var{b}) -These functions return a value less than or equal to zero if neither -argument is NaN, and @var{a} is less than or equal to @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} int __gtsf2 (float @var{a}, float @var{b}) -@deftypefnx {Runtime Function} int __gtdf2 (double @var{a}, double @var{b}) -@deftypefnx {Runtime Function} int __gttf2 (long double @var{a}, long double @var{b}) -These functions return a value greater than zero if neither argument -is NaN, and @var{a} is strictly greater than @var{b}. -@end deftypefn - -@subsection Other floating-point functions - -@deftypefn {Runtime Function} float __powisf2 (float @var{a}, int @var{b}) -@deftypefnx {Runtime Function} double __powidf2 (double @var{a}, int @var{b}) -@deftypefnx {Runtime Function} {long double} __powitf2 (long double @var{a}, int @var{b}) -@deftypefnx {Runtime Function} {long double} __powixf2 (long double @var{a}, int @var{b}) -These functions convert raise @var{a} to the power @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} {complex float} __mulsc3 (float @var{a}, float @var{b}, float @var{c}, float @var{d}) -@deftypefnx {Runtime Function} {complex double} __muldc3 (double @var{a}, double @var{b}, double @var{c}, double @var{d}) -@deftypefnx {Runtime Function} {complex long double} __multc3 (long double @var{a}, long double @var{b}, long double @var{c}, long double @var{d}) -@deftypefnx {Runtime Function} {complex long double} __mulxc3 (long double @var{a}, long double @var{b}, long double @var{c}, long double @var{d}) -These functions return the product of @math{@var{a} + i@var{b}} and -@math{@var{c} + i@var{d}}, following the rules of C99 Annex G@. -@end deftypefn - -@deftypefn {Runtime Function} {complex float} __divsc3 (float @var{a}, float @var{b}, float @var{c}, float @var{d}) -@deftypefnx {Runtime Function} {complex double} __divdc3 (double @var{a}, double @var{b}, double @var{c}, double @var{d}) -@deftypefnx {Runtime Function} {complex long double} __divtc3 (long double @var{a}, long double @var{b}, long double @var{c}, long double @var{d}) -@deftypefnx {Runtime Function} {complex long double} __divxc3 (long double @var{a}, long double @var{b}, long double @var{c}, long double @var{d}) -These functions return the quotient of @math{@var{a} + i@var{b}} and -@math{@var{c} + i@var{d}} (i.e., @math{(@var{a} + i@var{b}) / (@var{c} -+ i@var{d})}), following the rules of C99 Annex G@. -@end deftypefn - -@node Decimal float library routines -@section Routines for decimal floating point emulation -@cindex decimal float library -@cindex IEEE-754R - -The software decimal floating point library implements IEEE 754R -decimal floating point arithmetic and is only activated on selected -targets. - -@subsection Arithmetic functions - -@deftypefn {Runtime Function} _Decimal32 __addsd3 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} _Decimal64 __adddd3 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} _Decimal128 __addtd3 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return the sum of @var{a} and @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} _Decimal32 __subsd3 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} _Decimal64 __subdd3 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} _Decimal128 __subtd3 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return the difference between @var{b} and @var{a}; -that is, @w{@math{@var{a} - @var{b}}}. -@end deftypefn - -@deftypefn {Runtime Function} _Decimal32 __mulsd3 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} _Decimal64 __muldd3 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} _Decimal128 __multd3 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return the product of @var{a} and @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} _Decimal32 __divsd3 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} _Decimal64 __divdd3 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} _Decimal128 __divtd3 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return the quotient of @var{a} and @var{b}; that is, -@w{@math{@var{a} / @var{b}}}. -@end deftypefn - -@deftypefn {Runtime Function} _Decimal32 __negsd2 (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} _Decimal64 __negdd2 (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} _Decimal128 __negtd2 (_Decimal128 @var{a}) -These functions return the negation of @var{a}. They simply flip the -sign bit, so they can produce negative zero and negative NaN@. -@end deftypefn - -@subsection Conversion functions - -@c DFP/DFP conversions -@deftypefn {Runtime Function} _Decimal64 __extendsddd2 (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} _Decimal128 __extendsdtd2 (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} _Decimal128 __extendddtd2 (_Decimal64 @var{a}) -@c DFP/binary FP conversions -@deftypefnx {Runtime Function} _Decimal32 __extendsfsd (float @var{a}) -@deftypefnx {Runtime Function} double __extendsddf (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} {long double} __extendsdxf (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} _Decimal64 __extendsfdd (float @var{a}) -@deftypefnx {Runtime Function} _Decimal64 __extenddfdd (double @var{a}) -@deftypefnx {Runtime Function} {long double} __extendddxf (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} _Decimal128 __extendsftd (float @var{a}) -@deftypefnx {Runtime Function} _Decimal128 __extenddftd (double @var{a}) -@deftypefnx {Runtime Function} _Decimal128 __extendxftd ({long double} @var{a}) -These functions extend @var{a} to the wider mode of their return type. -@end deftypefn - -@c DFP/DFP conversions -@deftypefn {Runtime Function} _Decimal32 __truncddsd2 (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} _Decimal32 __trunctdsd2 (_Decimal128 @var{a}) -@deftypefnx {Runtime Function} _Decimal64 __trunctddd2 (_Decimal128 @var{a}) -@c DFP/binary FP conversions -@deftypefnx {Runtime Function} float __truncsdsf (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} _Decimal32 __truncdfsd (double @var{a}) -@deftypefnx {Runtime Function} _Decimal32 __truncxfsd ({long double} @var{a}) -@deftypefnx {Runtime Function} float __truncddsf (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} double __truncdddf (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} _Decimal64 __truncxfdd ({long double} @var{a}) -@deftypefnx {Runtime Function} float __trunctdsf (_Decimal128 @var{a}) -@deftypefnx {Runtime Function} double __trunctddf (_Decimal128 @var{a}) -@deftypefnx {Runtime Function} {long double} __trunctdxf (_Decimal128 @var{a}) -These functions truncate @var{a} to the narrower mode of their return -type. -@end deftypefn - -@deftypefn {Runtime Function} int __fixsdsi (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} int __fixddsi (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} int __fixtdsi (_Decimal128 @var{a}) -These functions convert @var{a} to a signed integer. -@end deftypefn - -@deftypefn {Runtime Function} long __fixsddi (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} long __fixdddi (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} long __fixtddi (_Decimal128 @var{a}) -These functions convert @var{a} to a signed long. -@end deftypefn - -@deftypefn {Runtime Function} {unsigned int} __fixunssdsi (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} {unsigned int} __fixunsddsi (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} {unsigned int} __fixunstdsi (_Decimal128 @var{a}) -These functions convert @var{a} to an unsigned integer. Negative values all become zero. -@end deftypefn - -@deftypefn {Runtime Function} {unsigned long} __fixunssddi (_Decimal32 @var{a}) -@deftypefnx {Runtime Function} {unsigned long} __fixunsdddi (_Decimal64 @var{a}) -@deftypefnx {Runtime Function} {unsigned long} __fixunstddi (_Decimal128 @var{a}) -These functions convert @var{a} to an unsigned long. Negative values -all become zero. -@end deftypefn - -@deftypefn {Runtime Function} _Decimal32 __floatsisd (int @var{i}) -@deftypefnx {Runtime Function} _Decimal64 __floatsidd (int @var{i}) -@deftypefnx {Runtime Function} _Decimal128 __floatsitd (int @var{i}) -These functions convert @var{i}, a signed integer, to decimal floating point. -@end deftypefn - -@deftypefn {Runtime Function} _Decimal32 __floatdisd (long @var{i}) -@deftypefnx {Runtime Function} _Decimal64 __floatdidd (long @var{i}) -@deftypefnx {Runtime Function} _Decimal128 __floatditd (long @var{i}) -These functions convert @var{i}, a signed long, to decimal floating point. -@end deftypefn - -@deftypefn {Runtime Function} _Decimal32 __floatunssisd (unsigned int @var{i}) -@deftypefnx {Runtime Function} _Decimal64 __floatunssidd (unsigned int @var{i}) -@deftypefnx {Runtime Function} _Decimal128 __floatunssitd (unsigned int @var{i}) -These functions convert @var{i}, an unsigned integer, to decimal floating point. -@end deftypefn - -@deftypefn {Runtime Function} _Decimal32 __floatunsdisd (unsigned long @var{i}) -@deftypefnx {Runtime Function} _Decimal64 __floatunsdidd (unsigned long @var{i}) -@deftypefnx {Runtime Function} _Decimal128 __floatunsditd (unsigned long @var{i}) -These functions convert @var{i}, an unsigned long, to decimal floating point. -@end deftypefn - -@subsection Comparison functions - -@deftypefn {Runtime Function} int __unordsd2 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} int __unorddd2 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} int __unordtd2 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return a nonzero value if either argument is NaN, otherwise 0. -@end deftypefn - -There is also a complete group of higher level functions which -correspond directly to comparison operators. They implement the ISO C -semantics for floating-point comparisons, taking NaN into account. -Pay careful attention to the return values defined for each set. -Under the hood, all of these routines are implemented as - -@smallexample - if (__unord@var{X}d2 (a, b)) - return @var{E}; - return __cmp@var{X}d2 (a, b); -@end smallexample - -@noindent -where @var{E} is a constant chosen to give the proper behavior for -NaN@. Thus, the meaning of the return value is different for each set. -Do not rely on this implementation; only the semantics documented -below are guaranteed. - -@deftypefn {Runtime Function} int __eqsd2 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} int __eqdd2 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} int __eqtd2 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return zero if neither argument is NaN, and @var{a} and -@var{b} are equal. -@end deftypefn - -@deftypefn {Runtime Function} int __nesd2 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} int __nedd2 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} int __netd2 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return a nonzero value if either argument is NaN, or -if @var{a} and @var{b} are unequal. -@end deftypefn - -@deftypefn {Runtime Function} int __gesd2 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} int __gedd2 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} int __getd2 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return a value greater than or equal to zero if -neither argument is NaN, and @var{a} is greater than or equal to -@var{b}. -@end deftypefn - -@deftypefn {Runtime Function} int __ltsd2 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} int __ltdd2 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} int __lttd2 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return a value less than zero if neither argument is -NaN, and @var{a} is strictly less than @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} int __lesd2 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} int __ledd2 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} int __letd2 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return a value less than or equal to zero if neither -argument is NaN, and @var{a} is less than or equal to @var{b}. -@end deftypefn - -@deftypefn {Runtime Function} int __gtsd2 (_Decimal32 @var{a}, _Decimal32 @var{b}) -@deftypefnx {Runtime Function} int __gtdd2 (_Decimal64 @var{a}, _Decimal64 @var{b}) -@deftypefnx {Runtime Function} int __gttd2 (_Decimal128 @var{a}, _Decimal128 @var{b}) -These functions return a value greater than zero if neither argument -is NaN, and @var{a} is strictly greater than @var{b}. -@end deftypefn - -@node Exception handling routines -@section Language-independent routines for exception handling - -document me! - -@smallexample - _Unwind_DeleteException - _Unwind_Find_FDE - _Unwind_ForcedUnwind - _Unwind_GetGR - _Unwind_GetIP - _Unwind_GetLanguageSpecificData - _Unwind_GetRegionStart - _Unwind_GetTextRelBase - _Unwind_GetDataRelBase - _Unwind_RaiseException - _Unwind_Resume - _Unwind_SetGR - _Unwind_SetIP - _Unwind_FindEnclosingFunction - _Unwind_SjLj_Register - _Unwind_SjLj_Unregister - _Unwind_SjLj_RaiseException - _Unwind_SjLj_ForcedUnwind - _Unwind_SjLj_Resume - __deregister_frame - __deregister_frame_info - __deregister_frame_info_bases - __register_frame - __register_frame_info - __register_frame_info_bases - __register_frame_info_table - __register_frame_info_table_bases - __register_frame_table -@end smallexample - -@node Miscellaneous routines -@section Miscellaneous runtime library routines - -@subsection Cache control functions -@deftypefn {Runtime Function} void __clear_cache (char *@var{beg}, char *@var{end}) -This function clears the instruction cache between @var{beg} and @var{end}. -@end deftypefn |