Diff: Headers/FixedMath.h

Revision:

0:085749c8446f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Headers/FixedMath.h	Wed Jun 13 15:10:06 2012 +0000
@@ -0,0 +1,63 @@
+#include "DataTypes.h"
+
+#ifndef FIXEDMATH_H_
+#define FIXEDMATH_H_
+
+
+typedef SIGNED_WORD FIXED_7_8;
+typedef SIGNED_WORD FIXED_9_6;
+
+typedef SIGNED_WORD FIXED_0_15;
+typedef SIGNED_WORD FIXED_1_14;
+
+
+extern const FIXED_1_14 Fixed_1_14_SineTable [256];
+extern const FIXED_7_8 Fixed_7_8_SineTable [256];
+
+#define FMul_15_0(A,B)             (FIXED_0_15)(((FIXED_0_15)(A) * (FIXED_0_15 )(B))>>15)
+#define FMul_7_8to0_15(A,B)        (FIXED_7_8)(((FIXED_7_8)(A) * (FIXED_0_15)(B))>>15)
+#define FMul_15_0to7_8(A,B)        (SIGNED_WORD)(((SIGNED_WORD)(A) * (FIXED_7_8)(B))>>8)
+
+
+
+#define INT_7_8(A)                (SIGNED_WORD)(A>>8)
+#define INT_TO_7_8(A)            ((FIXED_7_8)(A)<<8)
+#define FRAC_7_8(A)                (FIXED_7_8)(A&0xFF)
+
+#define INT_9_6(A)                (SIGNED_WORD)(A>>6)
+#define INT_TO_9_6(A)            ((FIXED_9_6)(A)<<6)
+#define FRAC_6_9(A)                (FIXED_9_6)(A&0x3F)
+
+
+
+//#define FMul_15_0to0_15            (SIGNED_WORD)(((SIGNED_WORD)(A) * (FIXED_0_15)(B))>>16)
+inline SIGNED_WORD FMul_15_0to0_15(SIGNED_WORD A,SIGNED_WORD B)
+{
+    return  (((long)(A) * (long)(B))>>15);
+}
+
+inline SIGNED_WORD FMul_15_0to1_14(SIGNED_WORD A,SIGNED_WORD B)
+{
+    long temp;
+    temp = (((long)(A) * (long)(B))>>13);
+    if(temp&0x01)
+    {
+        temp = temp>>1;
+        temp = temp +1;
+    }
+    else
+    {
+        temp = temp>>1;
+    }
+    return  temp;
+}
+
+//inline SIGNED_WORD ABS(A)
+//{
+    //if(A<0)
+        //return -A;
+    //else
+        //return A;    
+//}
+
+#endif /*FIXEDMATH_H_*/