Just "for fun and profit" (learning), I inserted an unnecessary HLASM
statement into a C program (helloworld.c type). I am curious about the
generated code. Mainly that the compiler inserted an NOPR 0 after my simple
command. The statement was the first executable in main() and output in the
compiler listing looks like:
000008 | * char word[]="123456";
00006E D206 D0B4 1000 000008 | MVC
word$init$0(7,r13,180),+CONSTANT_AREA(r1,0)
000009 | * __asm(" L
1,%0":"=m"(i3)::"r1");
*000000 581D 00B0 000B0 8 L 1,176(13)
000009
*000004 0700 9 NOPR 0
000009
000074 581D 00B0 000009 | L r1,176(r13,)
000078 0700 000009 | NOPR 0
000010 | * printf("%.*s\n",i1,word);
The compile was done on z/OS UNIX shell invocation of xlc:
xlc -qaggregate -qasm -qchars=unsigned -qevents=hello.events -qexpmac
-qinfo -qlanglvl=extc1x -qoffset -qshowinc -qlist -qskipsrc=hide
-qsource=hello.lst hello.c
The compiler said it was: "5650ZOS V2.1.1 z/OS XL C"
This is just curiosity on my part. It is not a "bug" or a complaint.
--
Schrodinger's backup: The condition of any backup is unknown until a
restore is attempted.
Yoda of Borg, we are. Futile, resistance is, yes. Assimilated, you will be.
He's about as useful as a wax frying pan.
10 to the 12th power microphones = 1 Megaphone
Maranatha! <><
John McKown
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
