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view dmd2/port.h @ 1047:6bb04dbee21f
Some calling convention work for x86-64:
- Implement x86-64 extern(C), hopefully correctly.
- Tried to be a bit smarter about extern(D) while I was there.
Interestingly, this code seems to be generating more efficient code than
gcc and llvm-gcc in some edge cases, like returning a `{ [7 x i8] }` loaded from
a stack slot from an extern(C) function. (gcc generates 7 1-byte loads, while
this code generates a 4-byte, a 2-byte and a 1-byte load)
I also added some changes to make sure structs being returned from functions or
passed in as parameters are stored in memory where the rest of the backend seems
to expect them to be. These should be removed when support for first-class
aggregates improves.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Fri, 06 Mar 2009 16:00:47 +0100 |
parents | f04dde6e882c |
children |
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// Copyright (c) 1999-2002 by Digital Mars // All Rights Reserved // written by Walter Bright // www.digitalmars.com #ifndef PORT_H #define PORT_H // Portable wrapper around compiler/system specific things. // The idea is to minimize #ifdef's in the app code. #ifndef TYPEDEFS #define TYPEDEFS #include <wchar.h> #if _MSC_VER typedef __int64 longlong; typedef unsigned __int64 ulonglong; #else typedef long long longlong; typedef unsigned long long ulonglong; #endif #endif typedef double d_time; struct Port { static double nan; static double infinity; static double dbl_max; static double dbl_min; #if __GNUC__ // These conflict with macros in math.h, should rename them #undef isnan #undef isfinite #undef isinfinity #undef signbit #endif static int isNan(double); static int isFinite(double); static int isInfinity(double); static int Signbit(double); static double floor(double); static double pow(double x, double y); static ulonglong strtoull(const char *p, char **pend, int base); static char *ull_to_string(char *buffer, ulonglong ull); static wchar_t *ull_to_string(wchar_t *buffer, ulonglong ull); // Convert ulonglong to double static double ull_to_double(ulonglong ull); // Get locale-dependent list separator static char *list_separator(); static wchar_t *wlist_separator(); }; #endif