SparrowOSTS_121127.ISO

SparrowOS/Demo/SubIntAccess.CPP

@@ -0,0 +1,32 @@
+/*
+  SparrowOS has a feat that allows
+  access to bytes and words of larger
+  integers.
+
+  See $LK,"U64i union","FF:::/SparrowOS/OSMain/Adam1a.HPP.Z,U64i union"$
+ 
+  The versions with "i" are internal data types.
+  Use "I64" instead of "U64i" and you
+  will have access to subbytes and
+  subwords.
+
+$BK,1$	Unfortunately byte access causes the
+  compiler to not use a register for the
+  variable.$BK,0$
+
+  See $LK,"::/SparrowOS/Demo/Lectures/FixedPoint.CPP.Z","FI:::/SparrowOS/Demo/Lectures/FixedPoint.CPP.Z"$.
+*/
+
+I64 q=0xFEDCBA9876543210,q1;
+
+"q\t\t=%016X\n",q;
+q1=q.i16[2];
+"q.i16[2]\t=%016X\n",q1;
+q1=q.u8[5];
+"q.u8[5]\t\t=%016X\n",q1;
+q1=q.i32[1].u8[2];
+"q.i32[1].u8[2]\t=%016X\n",q1;
+q1=q.i32[0].i8[1];
+"q.i32[0].i8[1]\t=%016X\n",q1;
+
+