Re: Floating Point Definitions
On Wed, 30 Apr 2008 17:48:05 +0300, Binyamin Dissen wrote: >You can do > >FP2 EQU 2 >R2EQU 2 > >and if you > >LRR3,FP2 > >GR2 will be copied, not FPR2. And with the current release of HLASM you can also do this: R2 EQU 2GR R3 EQU 3GR ... FP2 EQU 2FPR and HLASM will then flag the above LR statement with a warning: ** ASMA323W Symbol FP2 has incompatible type with general register field Regards, Roger Bowler -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Floating Point Definitions
On Wed, 30 Apr 2008 06:34:31 -0700 Howard Rifkind <[EMAIL PROTECTED]> wrote: :>But can you give me an example of how one would code :>the instruction, showing a difference between GPR and :>the floating point register. The S/370-Z assembler is different that the assemblers for Intel. The opcodes for the S/370 assembler specify the type of operand. If you wish to copy a 32 bit value from a GPR to another GPR, you use LR. If you wish to copy a 32 bit value from one FPR to another, you use LER. To copy a FPR into a GPR you use LGDR. Each instruction generates a unique machine instruction. For Intel, as I recall it, there was a simple MOV opcode which would generate different machine code based on the operands. :>If you could use an EQU it would clear up the :>confusion to anyone reading the program. EQU is irrelevant to the issue. You can do FP2 EQU 2 R2EQU 2 and if you LRR3,FP2 GR2 will be copied, not FPR2. The opcode itself specifies what the operands are. :>--- Binyamin Dissen <[EMAIL PROTECTED]> :>wrote: :>> On Sun, 27 Apr 2008 11:28:00 -0700 Howard Rifkind :>> <[EMAIL PROTECTED]> wrote: :>> :>I want to use some of the floating point registers :>> for :>> :>general register purposes. I was told I could do :>> this :>> :>but I don't understand how to define them in the :>> :>assembler language program. :>> Only for some purposes. :>> :>For instance, I would define a general register :>> with :>> :>an equate such as: :>> :>R10 EQ 2 Equate Register 2 to R10 :>> :>However I would I do this for Floating point :>> register :>> :>3. :>> :>Hope my questions is clear. :>> :>And do I have to normalize the floating point :>> register :>> :>to use it for normal addresses? :>> You can't use them to address data. :>> You can save a GPR in an FPR with the appropriate :>> hardware, but it would lead :>> to most confusing code (IMHO). :>> You can use them for fixed point operations. -- Binyamin Dissen <[EMAIL PROTECTED]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Floating Point Definitions
Thanks, But can you give me an example of how one would code the instruction, showing a difference between GPR and the floating point register. If you could use an EQU it would clear up the confusion to anyone reading the program. Thanks. --- Binyamin Dissen <[EMAIL PROTECTED]> wrote: > On Sun, 27 Apr 2008 11:28:00 -0700 Howard Rifkind > <[EMAIL PROTECTED]> wrote: > > :>I want to use some of the floating point registers > for > :>general register purposes. I was told I could do > this > :>but I don't understand how to define them in the > :>assembler language program. > > Only for some purposes. > > :>For instance, I would define a general register > with > :>an equate such as: > > :>R10 EQ 2 Equate Register 2 to R10 > > :>However I would I do this for Floating point > register > :>3. > > :>Hope my questions is clear. > > :>And do I have to normalize the floating point > register > :>to use it for normal addresses? > > You can't use them to address data. > > You can save a GPR in an FPR with the appropriate > hardware, but it would lead > to most confusing code (IMHO). > > You can use them for fixed point operations. > > -- > Binyamin Dissen <[EMAIL PROTECTED]> > http://www.dissensoftware.com > > Director, Dissen Software, Bar & Grill - Israel > > > Should you use the mailblocks package and expect a > response from me, > you should preauthorize the dissensoftware.com > domain. > > I very rarely bother responding to > challenge/response systems, > especially those from irresponsible companies. > > -- > For IBM-MAIN subscribe / signoff / archive access > instructions, > send email to [EMAIL PROTECTED] with the message: > GET IBM-MAIN INFO > Search the archives at > http://bama.ua.edu/archives/ibm-main.html > > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Floating Point Definitions
On Sun, 27 Apr 2008 11:28:00 -0700 Howard Rifkind <[EMAIL PROTECTED]> wrote: :>I want to use some of the floating point registers for :>general register purposes. I was told I could do this :>but I don't understand how to define them in the :>assembler language program. Only for some purposes. :>For instance, I would define a general register with :>an equate such as: :>R10 EQ 2 Equate Register 2 to R10 :>However I would I do this for Floating point register :>3. :>Hope my questions is clear. :>And do I have to normalize the floating point register :>to use it for normal addresses? You can't use them to address data. You can save a GPR in an FPR with the appropriate hardware, but it would lead to most confusing code (IMHO). You can use them for fixed point operations. -- Binyamin Dissen <[EMAIL PROTECTED]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Floating Point Definitions
Speaking of Floating Point, I want to use some of the floating point registers for general register purposes. I was told I could do this but I don't understand how to define them in the assembler language program. For instance, I would define a general register with an equate such as: R10 EQ 2 Equate Register 2 to R10 However I would I do this for Floating point register 3. Hope my questions is clear. And do I have to normalize the floating point register to use it for normal addresses? Thanks. Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
