Added Jaguar Object Processor assembler.

[rmac] / fltpoint.c

diff --git a/fltpoint.c b/fltpoint.c
index fa1eb41ad9c78af887a63b444f099a4ecf184d95..911e0085ae2729b6c513cf16f975061a86287adb 100644 (file)
--- a/fltpoint.c
+++ b/fltpoint.c
@@ -14,6 +14,7 @@
 #include "fltpoint.h"
 #include <float.h>
 #include <math.h>
+#include <stdio.h>
 
 //
 // Check for IEEE-754 conformance (C99 compilers should be OK here)
@@ -169,3 +170,25 @@ void DoubleToExtended(double d, uint8_t out[])
        out[11] = intMant & 0xFF;
 }
 
+
+//
+// Convert a host native floating point number to a fixed point number.
+//
+uint64_t DoubleToFixedPoint(double d, int intBits, int fracBits)
+{
+       uint8_t signBit = (signbit(d) ? 1 : 0);
+
+       // Ensure what we're working on is positive...
+       if (d < 0)
+               d *= -1;
+
+       double scaleFactor = (double)(1 << fracBits);
+       uint64_t result = (uint64_t)(d * scaleFactor);
+
+       // Invert the result, if necessary
+       if (signBit == 1)
+               result = (result = 0xFFFFFFFFFFFFFFFFLL) + 1;
+
+       return result;
+}
+