I also use the CL to catch negatives. One of those tricks I got from
this list.
Why the LTR? I don't know. I guess the reason is that I don't hardly
ever use an 'and' so I failed to notice that NR set the correct
condition code when I wrote this many years ago.
Tony Thigpen
-----Original Message -----
From: Gerhard Postpischil
Sent: 08/27/2012 02:29 PM
On 8/27/2012 1:19 PM, Tony Thigpen wrote:
Your code requires 2 scratch registers. The following uses just 1
scratch register and does not require literal storage:
LA R0,3
NR R0,R15
LTR R0,R0
BNZ BAD_RC
Why do you need the LTR? NR sets the condition code.
When I bother to add check code (mostly non-IBM calls), I use
CL R15,=A(maxvalue)
BH error
this test catches negative returns as well.
Gerhard Postpischil
Bradford, VT
