Author: steve-myers
Posted: Thu Dec 22, 2016 5:14 pm (GMT 5.5)
This is the PUT loop from the Assembler listing. The PUT macro is expanded.
I also located the code the PUT macro calls.
I still remember my reaction when I saw the the SLR/ICM business in the PUT macro to replace the OS/360 L 15,48(0,1). The SLR/ICM code works in an AMODE 31 program, though I didn't know that was the the reason when I first saw the code.
I have no idea what the purpose of the 3 NOPR instructions is. The cynic in me says they're there to sell more hardware.
Posted: Thu Dec 22, 2016 5:14 pm (GMT 5.5)
This is the PUT loop from the Assembler listing. The PUT macro is expanded.
| Code: |
| 53 LOOP PUT OUTPUT,OUTREC 000084 4110 C9B4 009B4 55+LOOP LA 1,OUTPUT 000088 4100 CB31 00B31 56+ LA 0,OUTREC 00008C 1FFF 57+ SLR 15,15 00008E BFF7 1031 00031 58+ ICM 15,7,49(1) 000092 05EF 59+ BALR 14,15 000094 4630 C084 00084 60 BCT 3,LOOP |
| Code: |
| PUTDUMMY NOPR 0 NOPR 0 NOPR 0 LR 1,0 BR 14 |
I have no idea what the purpose of the 3 NOPR instructions is. The cynic in me says they're there to sell more hardware.