How bizarre. I assumed that the RXE->RXY transition was fundamental, and RXE-format was completely superseded.
The -10 version of PoOp still shows RXE format for BFP instructions. There are a couple of odd DFP instructions that are documented as RXE, but DFP is mostly register-only. HFP of course, retains the historic RX-format op-codes, and evidently never added *Y forms. If I was interested enough, I think I'd test if the assembler agrees, and also coerce an RXY-format ADB or something to see what happens. There are RXY versions of LD (LDY), and STD (STDY), so I suppose this is a fairly academic issue. It's certainly not going to be a concern with my limited usage of FP. sas On Tue, Jan 17, 2017 at 11:09 AM, Jonathan Scott < jonathan_sc...@vnet.ibm.com> wrote: > Ref: Your note of Tue, 17 Jan 2017 10:38:47 -0500 > > It appears that the Summary of Changes is incorrect. The > floating point RXE instructions did not change to RXY format. > > Jonathan Scott > IBM Hursley, UK > -- sas
