ZealOS/src/Demo/SubIntAccess.ZC
TomAwezome 3a33e6baaf Rename CosmiC to ZealC.
Rename all .CC files to .ZC extension.
2021-12-11 06:21:22 -05:00

22 lines
653 B
HolyC
Executable file

/*ZealOS has a feature that allows access to bytes and words of larger ints.
See $LK,"U64i union",A="FF:::/Kernel/KernelA.HH,U64i union"$.
The versions with "i" are internal data types. Use "I64" instead of "U64i" and you will have access to subbytes and subwords.
Unfortunately, byte access causes the compiler to not use a register for the variable.
See $LK,"::/Demo/Lectures/FixedPoint.ZC"$.
*/
I64 q = 0xFEDCBA9876543210, q1;
"q\t\t\t\t=%016X\n", q;
q1 = q.i16[2];
"q.i16[2]\t\t=%016X\n", q1;
q1 = q.u8[5];
"q.u8[5]\t\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;