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Re: [RFC PATCH 0/7] VSX MMA Implementation

From: Lucas Mateus Martins Araujo e Castro
Subject: Re: [RFC PATCH 0/7] VSX MMA Implementation
Date: Thu, 28 Apr 2022 11:05:22 -0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0

Something I forgot to mention in the cover letter, the XVFGER instructions accumulate the exception status and at the end set the FPSCR and take a Program interrupt on a trap-enabled exception, but as the exception functions are currently set up in target/ppc/fpu_helper.c a call to set a FPSCR bit could raise an exception before all bits could be set.

Victor (CCing him) is working on a patch series to fix the FPSCR.FI bit that will reorganize do_float_check_status (that would solve the aforementioned problem), so for now I sent without trying to solve that problem

In v2 I'll remember to mention this in the cover letter

On 26/04/2022 09:50, Lucas Mateus Castro(alqotel) wrote:
From: "Lucas Mateus Castro (alqotel)" <lucas.araujo@eldorado.org.br>

This patch series is an RFC of the Matrix-Multiply Assist (MMA)
instructions implementation from the PowerISA 3.1 

These and the VDIV/VMOD implementation are the last new PowerISA 3.1
instructions left to be implemented.

Lucas Mateus Castro (alqotel) (7):
  target/ppc: Implement xxm[tf]acc and xxsetaccz
  target/ppc: Implemented xvi*ger* instructions
  target/ppc: Implemented pmxvi*ger* instructions
  target/ppc: Implemented xvf*ger*
  target/ppc: Implemented xvf16ger*
  target/ppc: Implemented pmxvf*ger*
  target/ppc: Implemented [pm]xvbf16ger2*

 include/fpu/softfloat.h             |   9 ++
 target/ppc/cpu.h                    |  15 +++
 target/ppc/fpu_helper.c             | 130 ++++++++++++++++++
 target/ppc/helper.h                 |   7 +
 target/ppc/insn32.decode            |  49 +++++++
 target/ppc/insn64.decode            |  80 +++++++++++
 target/ppc/int_helper.c             |  85 ++++++++++++
 target/ppc/internal.h               |  28 ++++
 target/ppc/translate/vsx-impl.c.inc | 200 ++++++++++++++++++++++++++++
 9 files changed, 603 insertions(+)

Lucas Mateus M. Araujo e Castro
Instituto de Pesquisas ELDORADO
Departamento Computação Embarcada
Analista de Software Trainee
Aviso Legal - Disclaimer

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