From cb70d5ee4f7f8b2209b79546db938bdd4d4727a1 Mon Sep 17 00:00:00 2001
From: Sintendo <bram.speeckaert@gmail.com>
Date: Thu, 19 Nov 2020 21:20:54 +0100
Subject: [PATCH] Jit64: srawix - Handle constant input register

Much like we did for srawx. This was already implemented on JitArm64.

Before:
B8 00 00 00 00       mov         eax,0
8B F0                mov         esi,eax
C1 E8 1F             shr         eax,1Fh
23 C6                and         eax,esi
D1 FE                sar         esi,1
88 45 58             mov         byte ptr [rbp+58h],al

After:
C6 45 58 00          mov         byte ptr [rbp+58h],0
---
 Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp b/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
index e7591429e1..608e588bad 100644
--- a/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
+++ b/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
@@ -1995,7 +1995,13 @@ void Jit64::srawix(UGeckoInstruction inst)
   int s = inst.RS;
   int amount = inst.SH;
 
-  if (amount != 0)
+  if (gpr.IsImm(s))
+  {
+    s32 imm = gpr.SImm32(s);
+    gpr.SetImmediate32(a, imm >> amount);
+    FinalizeCarry(amount != 0 && imm < 0 && (u32(imm) << (32 - amount)));
+  }
+  else if (amount != 0)
   {
     RCX64Reg Ra = gpr.Bind(a, RCMode::Write);
     RCOpArg Rs = gpr.Use(s, RCMode::Read);