Mercurial > projects > ldc
view lphobos/std/c/fenv.d @ 920:545f54041d91
Implemented proper support for naked asm using llvm module level asm. Still not 100% complete, but already 1000 times better that what we had before. Don's BignumX86 implementation from Tango (when turned into a standalone unittest) seems to fully work with no changes, and great performance :)
Fixed align N; in asm blocks.
Fixed inreg parameter passing on x86 for ref/out params.
Removed support for lazy initialization of function local static variables, I have no idea why I ever implemented this, it's not in the D spec, and DMD doesn't support it :P
Some of the global variable related changes might cause minor regressions, but they should be easily fixable.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Tue, 03 Feb 2009 08:54:57 +0100 |
parents | c53b6e3fe49a |
children |
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/** * C's <fenv.h> * Authors: Walter Bright, Digital Mars, www.digitalmars.com * License: Public Domain * Macros: * WIKI=Phobos/StdCFenv */ module std.c.fenv; extern (C): /// Entire floating point environment struct fenv_t { version (Windows) { ushort status; ushort control; ushort round; ushort reserved[2]; } else version (linux) { ushort __control_word; ushort __unused1; ushort __status_word; ushort __unused2; ushort __tags; ushort __unused3; uint __eip; ushort __cs_selector; ushort __opcode; uint __data_offset; ushort __data_selector; ushort __unused5; } else { static assert(0); } } alias int fexcept_t; /// Floating point status flags /// The various floating point exceptions enum { FE_INVALID = 1, /// FE_DENORMAL = 2, /// FE_DIVBYZERO = 4, /// FE_OVERFLOW = 8, /// FE_UNDERFLOW = 0x10, /// FE_INEXACT = 0x20, /// FE_ALL_EXCEPT = 0x3F, /// Mask of all the exceptions } /// Rounding modes enum { FE_TONEAREST = 0, /// FE_UPWARD = 0x800, /// FE_DOWNWARD = 0x400, /// FE_TOWARDZERO = 0xC00, /// } version (Windows) { extern fenv_t _FE_DFL_ENV; /// Default floating point environment fenv_t* FE_DFL_ENV = &_FE_DFL_ENV; } else version (linux) { /// Default floating point environment fenv_t* FE_DFL_ENV = cast(fenv_t*)(-1); } else { static assert(0); } /// Floating point precision enum { FE_FLTPREC = 0, /// FE_DBLPREC = 0x200, /// FE_LDBLPREC = 0x300, /// } int fetestexcept(int excepts); /// int feraiseexcept(int excepts); /// int feclearexcept(int excepts); /// //int fegetexcept(fexcept_t *flagp,int excepts); /// //int fesetexcept(fexcept_t *flagp,int excepts); /// int fegetround(); /// int fesetround(int round); /// int fegetprec(); /// int fesetprec(int prec); /// int fegetenv(fenv_t *envp); /// int fesetenv(fenv_t *envp); /// //void feprocentry(fenv_t *envp); /// //void feprocexit(const fenv_t *envp); /// int fegetexceptflag(fexcept_t *flagp,int excepts); /// int fesetexceptflag(fexcept_t *flagp,int excepts); /// int feholdexcept(fenv_t *envp); /// int feupdateenv(fenv_t *envp); ///