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i386-gen: preserve fp control word in gen_cvt_ftoi

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- Use runtime function for conversion
- Also initialize fp with tcc -run on windows

This fixes a bug where
  double x = 1.0;
  double y = 1.0000000000000001;
  double z = x < y ? 0 : sqrt (x*x - y*y);
caused a bad sqrt because rounding precision for the x < y comparison
was different to the one used within the sqrt function.

This also fixes a bug where
  printf("%d, %d", (int)pow(10, 2), (int)pow(10, 2));
would print
  100, 99

Unrelated:
  win32: document relative include & lib lookup
  win32: normalize_slashes: do not mirror silly gcc behavior
  This reverts part of commit 8a81f9e103
  winapi: add missing WINAPI decl. for some functions
This commit is contained in:
grischka
2013-08-28 22:55:05 +02:00
parent 69c2e7f96c
commit 73faaea227
11 changed files with 77 additions and 107 deletions
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12
win32/include/winapi/winbase.h
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@ -968,15 +968,15 @@ extern "C" {
LONG64 InterlockedExchangeAdd64(LONG64 volatile *Addend,LONG64 Value);
LONG64 InterlockedCompareExchange64(LONG64 volatile *Destination,LONG64 ExChange,LONG64 Comperand);
#else
LONG InterlockedIncrement(LONG volatile *lpAddend);
LONG InterlockedDecrement(LONG volatile *lpAddend);
LONG InterlockedExchange(LONG volatile *Target,LONG Value);
LONG WINAPI InterlockedIncrement(LONG volatile *lpAddend);
LONG WINAPI InterlockedDecrement(LONG volatile *lpAddend);
LONG WINAPI InterlockedExchange(LONG volatile *Target,LONG Value);
#define InterlockedExchangePointer(Target,Value) (PVOID)InterlockedExchange((PLONG)(Target),(LONG)(Value))
LONG InterlockedExchangeAdd(LONG volatile *Addend,LONG Value);
LONG InterlockedCompareExchange(LONG volatile *Destination,LONG Exchange,LONG Comperand);
LONGLONG InterlockedCompareExchange64(LONGLONG volatile *Destination,LONGLONG Exchange,LONGLONG Comperand);
LONG WINAPI InterlockedExchangeAdd(LONG volatile *Addend,LONG Value);
LONG WINAPI InterlockedCompareExchange(LONG volatile *Destination,LONG Exchange,LONG Comperand);
LONGLONG WINAPI InterlockedCompareExchange64(LONGLONG volatile *Destination,LONGLONG Exchange,LONGLONG Comperand);
__CRT_INLINE LONGLONG InterlockedAnd64 (LONGLONG volatile *Destination,LONGLONG Value) {
LONGLONG Old;