commit 634c9417bdc81d9284e2831b818280eb5b04860a
author Mike Reed <reed@google.com> Thu Jul 18 13:20:04 2019 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Thu Jul 18 19:07:49 2019 +0000
tree d84963a8f9877e83b4c029a4ed94602150ec73a3
parent 62bccdaf3c1715fe47917e5f53d10364a9ed197e

add inverse() intrinsic function to sksl

Change-Id: Ic30f6e0345e851ea8a942996b9eaf2c894455e3e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228236
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Reed <reed@google.com>

src/sksl/SkSLByteCodeGenerator.cpp

diff --git a/src/sksl/SkSLByteCodeGenerator.cpp b/src/sksl/SkSLByteCodeGenerator.cpp
index 4b57673..8893ddb 100644
--- a/src/sksl/SkSLByteCodeGenerator.cpp
+++ b/src/sksl/SkSLByteCodeGenerator.cpp
@@ -17,13 +17,14 @@
     , fContext(*context)
     , fOutput(output)
     , fIntrinsics {
-         { "cos",   ByteCodeInstruction::kCos },
-         { "cross", ByteCodeInstruction::kCross },
-         { "dot",   SpecialIntrinsic::kDot },
-         { "sin",   ByteCodeInstruction::kSin },
-         { "sqrt",  ByteCodeInstruction::kSqrt },
-         { "tan",   ByteCodeInstruction::kTan },
-         { "mix",   ByteCodeInstruction::kMix },
+         { "cos",     ByteCodeInstruction::kCos },
+         { "cross",   ByteCodeInstruction::kCross },
+         { "dot",     SpecialIntrinsic::kDot },
+         { "inverse", ByteCodeInstruction::kInverse2x2 },
+         { "sin",     ByteCodeInstruction::kSin },
+         { "sqrt",    ByteCodeInstruction::kSqrt },
+         { "tan",     ByteCodeInstruction::kTan },
+         { "mix",     ByteCodeInstruction::kMix },
       } {}
 
 
@@ -203,6 +204,10 @@
         VECTOR_UNARY_OP(kNegateF)
         VECTOR_UNARY_OP(kNegateI)
 
+        case ByteCodeInstruction::kInverse2x2:
+        case ByteCodeInstruction::kInverse3x3:
+        case ByteCodeInstruction::kInverse4x4: return 0;
+
         case ByteCodeInstruction::kNotB: return 0;
         case ByteCodeInstruction::kNegateFN: return 0;
 
@@ -885,6 +890,17 @@
             case ByteCodeInstruction::kCross:
                 this->write(found->second.fValue.fInstruction);
                 break;
+            case ByteCodeInstruction::kInverse2x2: {
+                SkASSERT(c.fArguments.size() > 0);
+                auto op = ByteCodeInstruction::kInverse2x2;
+                switch (count) {
+                    case 4: break;  // float2x2
+                    case 9:  op = ByteCodeInstruction::kInverse3x3; break;
+                    case 16: op = ByteCodeInstruction::kInverse4x4; break;
+                    default: SkASSERT(false);
+                }
+                this->write(op);
+            } break;
             default:
                 SkASSERT(false);
         }