win32ss/gdi/eng/floatobj.h

   1 #pragma once
   2
   3 #if defined(_M_IX86)
   4
   5 FORCEINLINE
   6 BOOL
   7 _FLOATOBJ_Equal(FLOATOBJ *pf1, FLOATOBJ *pf2)
   8 {
   9     EFLOAT_S *pef1 = (EFLOAT_S*)pf1;
  10     EFLOAT_S *pef2 = (EFLOAT_S*)pf2;
  11     return (pef1->lMant == pef2->lMant && pef1->lExp == pef2->lExp);
  12 }
  13
  14 FORCEINLINE
  15 LONG
  16 _FLOATOBJ_GetLong(FLOATOBJ *pf)
  17 {
  18     EFLOAT_S *pef = (EFLOAT_S*)pf;
  19     return pef->lMant >> (32 - pef->lExp);
  20 }
  21
  22 FORCEINLINE
  23 LONG
  24 _FLOATOBJ_GetFix(FLOATOBJ *pf)
  25 {
  26     EFLOAT_S *pef = (EFLOAT_S*)pf;
  27     LONG Shift = (28 - pef->lExp);
  28     return (Shift >= 0 ? pef->lMant >> Shift : pef->lMant << -Shift);
  29 }
  30
  31 FORCEINLINE
  32 BOOL
  33 _FLOATOBJ_IsLong(FLOATOBJ *pf)
  34 {
  35     EFLOAT_S *pef = (EFLOAT_S*)pf;
  36     ULONG ulShift = pef->lExp;
  37     if (ulShift < 32)
  38         return ((pef->lMant << ulShift) == 0);
  39     else
  40         return (ulShift == 32);
  41 }
  42
  43 FORCEINLINE
  44 BOOL
  45 _FLOATOBJ_Equal0(FLOATOBJ *pf)
  46 {
  47     EFLOAT_S *pef = (EFLOAT_S*)pf;
  48     return (pef->lMant == 0 && pef->lExp == 0);
  49 }
  50
  51 FORCEINLINE
  52 BOOL
  53 _FLOATOBJ_Equal1(FLOATOBJ *pf)
  54 {
  55     EFLOAT_S *pef = (EFLOAT_S*)pf;
  56     return (pef->lMant == 0x40000000 && pef->lExp == 2);
  57 }
  58
  59 extern const FLOATOBJ gef0;
  60 extern const FLOATOBJ gef1;
  61 extern const FLOATOBJ gef16;
  62
  63 #define FLOATOBJ_0 {0x00000000, 0x00000000}
  64 #define FLOATOBJ_1 {0x40000000, 0x00000002}
  65 #define FLOATOBJ_16 {0x40000000, 0x00000006}
  66 #define FLOATOBJ_1_16 {0x40000000, 0xfffffffe}
  67
  68 #define FLOATOBJ_Set0(fo) do { (fo)->ul1 = 0; (fo)->ul2 = 0; } while (0)
  69 #define FLOATOBJ_Set1(fo) do { (fo)->ul1 = 0x40000000; (fo)->ul2 = 2; } while (0)
  70
  71 #else
  72
  73 #define _FLOATOBJ_Equal(pf,pf1) (*(pf) == *(pf1))
  74 #define _FLOATOBJ_GetLong(pf) ((LONG)*(pf))
  75 #define _FLOATOBJ_IsLong(pf) ((FLOAT)((LONG)*(pf)) == *(pf))
  76 #define _FLOATOBJ_Equal0(pf) (*(pf) == 0.)
  77 #define _FLOATOBJ_Equal1(pf) (*(pf) == 1.)
  78 #define _FLOATOBJ_GetFix(pf) ((LONG)(*(pf) * 16.))
  79
  80 #define FLOATOBJ_0 0.
  81 #define FLOATOBJ_1 1.
  82 #define FLOATOBJ_16 16.
  83 #define FLOATOBJ_1_16 (1./16.)
  84
  85 static const FLOATOBJ gef0 = 0.;
  86 static const FLOATOBJ gef1 = 1.;
  87 static const FLOATOBJ gef16 = 16.;
  88
  89 #define FLOATOBJ_Set0(fo) *(fo) = 0;
  90 #define FLOATOBJ_Set1(fo) *(fo) = 1;
  91
  92 #endif