Fix exp2 for integer input.

exp2(x) should be exact for integer values of x. For example exp(1.0) should produce 2.0. Change-Id: I9d6d1d388c23e813e09b7b5788c929ff07189357 Reviewed-on: https://swiftshader-review.googlesource.com/16188Tested-by: Nicolas Capens <nicolascapens@google.com> Reviewed-by: Alexis Hétu <sugoi@google.com>

Fix exp2 for integer input.
2d261a56 · Nicolas Capens · Nicolas Capens · cb302f92 · 2d261a56
Commit 2d261a56 authored Jan 10, 2018 by Nicolas Capens Committed by Nicolas Capens Jan 11, 2018
Hide whitespace changes
Inline Side-by-side

Showing with 1 addition and 1 deletion

ShaderCore.cpp src/Shader/ShaderCore.cpp +1 -1

No files found.
--- a/src/Shader/ShaderCore.cpp
+++ b/src/Shader/ShaderCore.cpp
@@ -139,7 +139,7 @@ namespace sw
 		x1 *= x0;
 		x1 += As<Float4>(Int4(0x3F31727B));   // 6.9315308e-1f
 		x1 *= x0;
-		x1 += As<Float4>(Int4(0x3F7FFFFF));   // 9.9999994e-1f
+		x1 += Float4(1.0f);
 		x1 *= As<Float4>(x2);

 		return x1;