Re: SHI instruction
> On Dec 20, 2021, at 12:57:41, Alan Atkinson wrote: > > Which is just what we did - but turned it onto a macro. > > MACRO > SHI , SUBTRACT HALFWORD IMMEDIATE > AHI ,-() > MEXIT > MEND > (Are the parentheses needed around a SETA symbol? I see a SETC symbol might require them. I'd prefer that they appear at the point of definition: $C. SETC '(100-58)' ... if tradition hadn't overloaded them to mean register reference.) There's a slight gap due to the asymmetric 2's complement range. Consider: * if: AEQU -X'8000' * I can do: SH1,=Y(A) * but not: AHI 1,-A -- gil
Re: SHI instruction
Simpler still: Just code the AHI instruction with a negated argument. Keven > On Dec 20, 2021, at 13:57, Alan Atkinson wrote: > > Which is just what we did - but turned it onto a macro. > > MACRO > SHI , SUBTRACT HALFWORD IMMEDIATE > AHI ,-() > MEXIT > MEND > > On 12/20/21, 1:06 PM, "IBM Mainframe Assembler List on behalf of Ed Jaffe" > > wrote: > > > EXTERNAL > > >== >>On 12/20/2021 10:03 AM, industryn...@winwholesale.com wrote: >>AHI ,()*-1 > >Or you could simply use: > > AHI ,-() > >-- >Phoenix Software International >Edward E. Jaffe >831 Parkview Drive North >El Segundo, CA 90245 >https://www.phoenixsoftware.com/ > > > > >This e-mail message, including any attachments, appended messages and the >information contained therein, is for the sole use of the intended >recipient(s). If you are not an intended recipient or have otherwise >received this email message in error, any use, dissemination, distribution, >review, storage or copying of this e-mail message and the information >contained therein is strictly prohibited. If you are not an intended >recipient, please contact the sender by reply e-mail and destroy all copies >of this email message and do not otherwise utilize or retain this email >message or any or all of the information contained therein. Although this >email message and any attachments or appended messages are believed to be >free of any virus or other defect that might affect any computer system > into >which it is received and opened, it is the responsibility of the recipient >to ensure that it is virus free and no responsibility is accepted by the >sender for any loss or damage arising in any way from its opening or use. >
Re: SHI instruction
Which is just what we did - but turned it onto a macro. MACRO SHI , SUBTRACT HALFWORD IMMEDIATE AHI ,-() MEXIT MEND On 12/20/21, 1:06 PM, "IBM Mainframe Assembler List on behalf of Ed Jaffe" wrote: EXTERNAL == On 12/20/2021 10:03 AM, industryn...@winwholesale.com wrote: >AHI ,()*-1 Or you could simply use: AHI ,-() -- Phoenix Software International Edward E. Jaffe 831 Parkview Drive North El Segundo, CA 90245 https://www.phoenixsoftware.com/ This e-mail message, including any attachments, appended messages and the information contained therein, is for the sole use of the intended recipient(s). If you are not an intended recipient or have otherwise received this email message in error, any use, dissemination, distribution, review, storage or copying of this e-mail message and the information contained therein is strictly prohibited. If you are not an intended recipient, please contact the sender by reply e-mail and destroy all copies of this email message and do not otherwise utilize or retain this email message or any or all of the information contained therein. Although this email message and any attachments or appended messages are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by the sender for any loss or damage arising in any way from its opening or use.
Re: SHI instruction
On 12/20/2021 10:03 AM, industryn...@winwholesale.com wrote: AHI ,()*-1 Or you could simply use: AHI ,-() -- Phoenix Software International Edward E. Jaffe 831 Parkview Drive North El Segundo, CA 90245 https://www.phoenixsoftware.com/ This e-mail message, including any attachments, appended messages and the information contained therein, is for the sole use of the intended recipient(s). If you are not an intended recipient or have otherwise received this email message in error, any use, dissemination, distribution, review, storage or copying of this e-mail message and the information contained therein is strictly prohibited. If you are not an intended recipient, please contact the sender by reply e-mail and destroy all copies of this email message and do not otherwise utilize or retain this email message or any or all of the information contained therein. Although this email message and any attachments or appended messages are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by the sender for any loss or damage arising in any way from its opening or use.
