+/*------------------------------------------------------------------*/
+/* ulFromVal - value to unsigned long conversion */
+/*------------------------------------------------------------------*/
+unsigned long
+ulFromVal (value * val)
+{
+ if (!val)
+ return 0;
+
+ if (val->etype && SPEC_SCLS (val->etype) != S_LITERAL)
+ {
+ werror (E_CONST_EXPECTED, val->name);
+ return 0;
+ }
+
+ /* if it is not a specifier then we can assume that */
+ /* it will be an unsigned long */
+ if (!IS_SPEC (val->type))
+ return SPEC_CVAL (val->etype).v_ulong;
+
+ if (SPEC_NOUN (val->etype) == V_FLOAT)
+ return double2ul (SPEC_CVAL (val->etype).v_float);
+
+ if (SPEC_NOUN (val->etype) == V_FIXED16X16)
+ return double2ul (doubleFromFixed16x16 (SPEC_CVAL (val->etype).v_fixed16x16));
+
+ if (SPEC_LONG (val->etype))
+ {
+ if (SPEC_USIGN (val->etype))
+ return SPEC_CVAL (val->etype).v_ulong;
+ else
+ return SPEC_CVAL (val->etype).v_long;
+ }
+
+ if (SPEC_NOUN (val->etype) == V_INT)
+ {
+ if (SPEC_USIGN (val->etype))
+ return SPEC_CVAL (val->etype).v_uint;
+ else
+ return SPEC_CVAL (val->etype).v_int;
+ }
+
+ if (SPEC_NOUN (val->etype) == V_CHAR)
+ {
+ if (SPEC_USIGN (val->etype))
+ return (unsigned char) SPEC_CVAL (val->etype).v_uint;
+ else
+ return (signed char) SPEC_CVAL (val->etype).v_int;
+ }
+
+ if (IS_BITVAR(val->etype))
+ return SPEC_CVAL (val->etype).v_uint;
+
+ if (SPEC_NOUN (val->etype) == V_VOID)
+ return SPEC_CVAL (val->etype).v_ulong;
+
+ /* we are lost ! */
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__, "ulFromVal: unknown value");
+ return 0;
+}
+
+/*-----------------------------------------------------------------*/
+/* doubleFromFixed16x16 - convert a fixed16x16 to double */
+/*-----------------------------------------------------------------*/
+double doubleFromFixed16x16(TYPE_TARGET_ULONG value)
+{
+#if 0
+ /* This version is incorrect negative values. */
+ double tmp=0, exp=2;
+
+ tmp = (value & 0xffff0000) >> 16;
+
+ while(value) {
+ value &= 0xffff;
+ if(value & 0x8000)tmp += 1/exp;
+ exp *= 2;
+ value <<= 1;
+ }
+
+ return (tmp);
+#else
+ return ((double)(value * 1.0) / (double)(1UL << 16));
+#endif
+}
+
+TYPE_TARGET_ULONG fixed16x16FromDouble(double value)
+{
+#if 0
+ /* This version is incorrect negative values. */
+ unsigned int tmp=0, pos=16;
+ TYPE_TARGET_ULONG res;
+
+ tmp = floor( value );
+ res = tmp << 16;
+ value -= tmp;
+
+ tmp = 0;
+ while(pos--) {
+ value *= 2;
+ if(value >= 1.0)tmp |= (1 << pos);
+ value -= floor( value );
+ }
+
+ res |= tmp;
+
+ return (res);
+#else
+ return double2ul (value * (double)(1UL << 16));
+#endif
+}
+