From c106ae994425e384a9ad8d6d00747af71e8475a6 Mon Sep 17 00:00:00 2001
From: LDj3SNuD <35856442+LDj3SNuD@users.noreply.github.com>
Date: Sat, 23 Mar 2019 19:50:19 +0100
Subject: Add Tbl_V Sse opt. with Tests. (#651)

* Add v4, v5, v30, v31 required for Tbl_V Tests.

* Add Tests for Tbl_V.

* Add Tbl_V Sse opt..

* Nit.

* Small opt. on comparison constant vector.

* Nit.

* Add EmitLd/Stvectmp2/3.

* Nit.
---
 ChocolArm64/Instructions/InstEmitSimdMove.cs | 101 +++++++++++++++++++++------
 1 file changed, 80 insertions(+), 21 deletions(-)

(limited to 'ChocolArm64/Instructions/InstEmitSimdMove.cs')

diff --git a/ChocolArm64/Instructions/InstEmitSimdMove.cs b/ChocolArm64/Instructions/InstEmitSimdMove.cs
index 20647ce0..cdd35171 100644
--- a/ChocolArm64/Instructions/InstEmitSimdMove.cs
+++ b/ChocolArm64/Instructions/InstEmitSimdMove.cs
@@ -355,35 +355,94 @@ namespace ChocolArm64.Instructions
         {
             OpCodeSimdTbl64 op = (OpCodeSimdTbl64)context.CurrOp;
 
-            context.EmitLdvec(op.Rm);
-
-            for (int index = 0; index < op.Size; index++)
+            if (Optimizations.UseSsse3)
             {
-                context.EmitLdvec((op.Rn + index) & 0x1f);
-            }
+                Type[] typesCmpSflSub = new Type[] { typeof(Vector128<sbyte>), typeof(Vector128<sbyte>) };
+                Type[] typesOr        = new Type[] { typeof(Vector128<long> ), typeof(Vector128<long> ) };
+                Type[] typesSav       = new Type[] { typeof(long) };
 
-            switch (op.Size)
-            {
-                case 1: VectorHelper.EmitCall(context,
-                    nameof(VectorHelper.Tbl1_V64),
-                    nameof(VectorHelper.Tbl1_V128)); break;
+                context.EmitLdvec(op.Rn);
+                context.EmitLdvec(op.Rm);
 
-                case 2: VectorHelper.EmitCall(context,
-                    nameof(VectorHelper.Tbl2_V64),
-                    nameof(VectorHelper.Tbl2_V128)); break;
+                context.EmitLdc_I8(0x0F0F0F0F0F0F0F0FL);
+                context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.SetAllVector128), typesSav));
 
-                case 3: VectorHelper.EmitCall(context,
-                    nameof(VectorHelper.Tbl3_V64),
-                    nameof(VectorHelper.Tbl3_V128)); break;
+                context.EmitStvectmp2();
+                context.EmitLdvectmp2();
 
-                case 4: VectorHelper.EmitCall(context,
-                    nameof(VectorHelper.Tbl4_V64),
-                    nameof(VectorHelper.Tbl4_V128)); break;
+                context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.CompareGreaterThan), typesCmpSflSub));
 
-                default: throw new InvalidOperationException();
+                context.EmitLdvec(op.Rm);
+
+                context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.Or), typesOr));
+
+                context.EmitCall(typeof(Ssse3).GetMethod(nameof(Ssse3.Shuffle), typesCmpSflSub));
+
+                for (int index = 1; index < op.Size; index++)
+                {
+                    context.EmitLdvec((op.Rn + index) & 0x1F);
+                    context.EmitLdvec(op.Rm);
+
+                    context.EmitLdc_I8(0x1010101010101010L * index);
+                    context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.SetAllVector128), typesSav));
+
+                    context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.Subtract), typesCmpSflSub));
+
+                    context.EmitStvectmp();
+                    context.EmitLdvectmp();
+
+                    context.EmitLdvectmp2();
+
+                    context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.CompareGreaterThan), typesCmpSflSub));
+
+                    context.EmitLdvectmp();
+
+                    context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.Or), typesOr));
+
+                    context.EmitCall(typeof(Ssse3).GetMethod(nameof(Ssse3.Shuffle), typesCmpSflSub));
+
+                    context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.Or), typesOr));
+                }
+
+                context.EmitStvec(op.Rd);
+
+                if (op.RegisterSize == RegisterSize.Simd64)
+                {
+                    EmitVectorZeroUpper(context, op.Rd);
+                }
             }
+            else
+            {
+                context.EmitLdvec(op.Rm);
 
-            context.EmitStvec(op.Rd);
+                for (int index = 0; index < op.Size; index++)
+                {
+                    context.EmitLdvec((op.Rn + index) & 0x1F);
+                }
+
+                switch (op.Size)
+                {
+                    case 1: VectorHelper.EmitCall(context,
+                        nameof(VectorHelper.Tbl1_V64),
+                        nameof(VectorHelper.Tbl1_V128)); break;
+
+                    case 2: VectorHelper.EmitCall(context,
+                        nameof(VectorHelper.Tbl2_V64),
+                        nameof(VectorHelper.Tbl2_V128)); break;
+
+                    case 3: VectorHelper.EmitCall(context,
+                        nameof(VectorHelper.Tbl3_V64),
+                        nameof(VectorHelper.Tbl3_V128)); break;
+
+                    case 4: VectorHelper.EmitCall(context,
+                        nameof(VectorHelper.Tbl4_V64),
+                        nameof(VectorHelper.Tbl4_V128)); break;
+
+                    default: throw new InvalidOperationException();
+                }
+
+                context.EmitStvec(op.Rd);
+            }
         }
 
         public static void Trn1_V(ILEmitterCtx context)
-- 
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