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author | Alexis211 <alexis211@gmail.com> | 2009-11-13 18:05:27 +0100 |
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committer | Alexis211 <alexis211@gmail.com> | 2009-11-13 18:05:27 +0100 |
commit | 2b9e97b8635c20c5a2b87789b1014489863d1994 (patch) | |
tree | 58fa9f2fa82ac9477819193b6731b8b927187224 /Source/Library/Common/cppsupport.wtf.cpp | |
parent | 7e3ecd80af5ddcedbfa3d849284400ed6568f516 (diff) | |
download | Melon-2b9e97b8635c20c5a2b87789b1014489863d1994.tar.gz Melon-2b9e97b8635c20c5a2b87789b1014489863d1994.zip |
Added a game of life simulator demo
Diffstat (limited to 'Source/Library/Common/cppsupport.wtf.cpp')
-rw-r--r-- | Source/Library/Common/cppsupport.wtf.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Source/Library/Common/cppsupport.wtf.cpp b/Source/Library/Common/cppsupport.wtf.cpp new file mode 100644 index 0000000..06ef1b9 --- /dev/null +++ b/Source/Library/Common/cppsupport.wtf.cpp @@ -0,0 +1,54 @@ +//This file just contains a few methods required for some C++ things to work +#include <types.h> + +namespace CMem { + u8int* memcpy(u8int*, const u8int*, int); +}; + +using namespace CMem; + +extern "C" void __cxa_pure_virtual() {} //Required when using abstract classes + +void *__dso_handle; //Required when using global objects +extern "C" int __cxa_atexit(void (*f)(void*), void *p, void *d) { return 0; } + +extern "C" void * memmove(void* dst, const void* src, size_t len) { + memcpy((u8int*)dst, (const u8int*)src, len); + return dst; +} + +//Functions for quad divisions/modulo. Taken and arranged from klibc include/asm/div64.h +//These only work with 32-bit divisors and only return 32-bit remainder. +//TODO : think of some correct quad div/mod algorithms +inline u64int doDiv(u64int dividend, u32int divisor, u32int *remainder) { + union { + u64int v64; + u32int v32[2]; + } d = { dividend }; + u32int upper; + + upper = d.v32[1]; + d.v32[1] = 0; + if (upper >= divisor) { + d.v32[1] = upper / divisor; + upper %= divisor; + } + asm ("divl %2" : "=a" (d.v32[0]), "=d" (*remainder) : + "rm" (divisor), "0" (d.v32[0]), "1" (upper)); + return d.v64; +} + +extern "C" { +u64int __udivdi3(u64int dividend, u64int b) { + u32int divisor, remainder; + divisor = b; + return doDiv(dividend, divisor, &remainder); +} + +u64int __umoddi3(u64int dividend, u64int b) { + u32int divisor, remainder; + divisor = b; + doDiv(dividend, divisor, &remainder); + return remainder; +} +} |