Add PowerPC paired-singles support

[riptl]

Adds support for the proprietary paired-singles extension in PowerPC 750CXe (Gekko) and 750CL (Broadway) CPUs.

• Add TableGen code
• Re-run synctools
• Update bindings
• Add GQR registers (not needed; GQRs are SPRs, which Capstone represents as immediate)
• Support psq_l, psq_lu, psq_st, psq_stu
• Test disassembly

Closes #476

[riptl]

PPC_CRRC0RegClassID got removed, most likely due to LLVM TableGen version mismatch.

[riptl]

Also causing build warnings

[kabeor]

@terorie Cool, that's really great work, thanks for your contribution! Can I merge now?
Btw, which version of llvm you are using, still 8.0.0?

[riptl]

@kabeor I am using LLVM 7.0.1 (without patches), which is the wrong version. It seems the correct version uses some LLVM patch that fixes a security vulnerability: #1510 (comment). So therefore I would be cautious not to reintroduce it.

Perhaps let's try to move to LLVM 8.0.1 before merging? Hopefully there aren't too many breaking changes.

To make the build work under LLVM 7.0.1, I used the following patch.

HTM patch

From c9d1d43410b56a92aa6951c85497d5fe94c6e80b Mon Sep 17 00:00:00 2001
From: Richard Patel <me@terorie.dev>
Date: Sat, 23 Jul 2022 08:38:29 +0200
Subject: [PATCH] htm

---
 suite/synctools/tablegen/PPC/PPCInstrHTM.td | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/suite/synctools/tablegen/PPC/PPCInstrHTM.td b/suite/synctools/tablegen/PPC/PPCInstrHTM.td
index f9c4f42b..fa33a7db 100644
--- a/suite/synctools/tablegen/PPC/PPCInstrHTM.td
+++ b/suite/synctools/tablegen/PPC/PPCInstrHTM.td
@@ -22,7 +22,7 @@ def HTM_get_imm : SDNodeXForm<imm, [{
 
 let hasSideEffects = 1, usesCustomInserter = 1  in {
 def TCHECK_RET : Pseudo<(outs gprc:$out), (ins), "#TCHECK_RET", []>;
-def TBEGIN_RET : PPCCustomInserterPseudo<(outs gprc:$out), (ins u1imm:$R), "#TBEGIN_RET", []>;
+def TBEGIN_RET : Pseudo<(outs gprc:$out), (ins u1imm:$R), "#TBEGIN_RET", []>;
 }
 
 
-- 
2.32.1 (Apple Git-133)

[kabeor]

Perhaps let's try to move to LLVM 8.0.1 before merging? Hopefully there aren't too many breaking changes.

It's no need for this PR:) But would you like to check #1803 and #1831? Maybe we can auto-sync the latest version by using this tools.

[riptl]

@kabeor Sounds good, should I try to run PowerPC arch through auto-sync now or wait until #1831 gets merged first? There's not really a rush in getting this PR merged, so let's try the cleanest way maybe?

[kabeor]

@kabeor Sounds good, should I try to run PowerPC arch through auto-sync now or wait until #1831 gets merged first? There's not really a rush in getting this PR merged, so let's try the cleanest way maybe?

Ah, I will merge this immediately (after ci test finished). As you see, #1803 and #1831 lost their contributors, so I wonder to know if you would like to continue work on it?

[riptl]

As you see, #1803 and #1831 lost their contributors, so I wonder to know if you would like to continue work on it?

@kabeor Alright, I'm up for the challenge :) I'm not very experienced with LLVM but sounds like a cool project.