commit 74da73fed3f1715f07a08e6b51fba02a87b794b1
author Olli Etuaho <oetuaho@nvidia.com> Wed Feb 01 15:37:48 2017 +0000
committer Commit Bot <commit-bot@chromium.org> Fri Feb 03 11:00:36 2017 +0000
tree 1716afbdbd684e8551a9d351e9bbb1012452c347
parent 7e24bfd332215266161c286f0f904857af52f342

Add ESSL 3.10 ldexp/frexp builtins

This adds new built-ins found in ESSL 3.10 section 8.3 Common
Functions.

This includes constant folding support for ldexp and support for both
GLSL and HLSL output. In HLSL these functions need to be emulated.

BUG=angleproject:1730
TEST=angle_unittests

Change-Id: I1330e69978b0cf53efbc3416150194764414e96c
Reviewed-on: https://chromium-review.googlesource.com/435342
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

src/compiler/translator/IntermNode.cpp

diff --git a/src/compiler/translator/IntermNode.cpp b/src/compiler/translator/IntermNode.cpp
index 4039305..1401af7 100644
--- a/src/compiler/translator/IntermNode.cpp
+++ b/src/compiler/translator/IntermNode.cpp
@@ -3012,6 +3012,25 @@
             break;
         }
 
+        case EOpLdexp:
+        {
+            resultArray = new TConstantUnion[maxObjectSize];
+            for (size_t i = 0; i < maxObjectSize; i++)
+            {
+                float x = unionArrays[0][i].getFConst();
+                int exp = unionArrays[1][i].getIConst();
+                if (exp > 128)
+                {
+                    UndefinedConstantFoldingError(loc, op, basicType, diagnostics, &resultArray[i]);
+                }
+                else
+                {
+                    resultArray[i].setFConst(gl::Ldexp(x, exp));
+                }
+            }
+            break;
+        }
+
         case EOpFaceForward:
         {
             ASSERT(basicType == EbtFloat);