Unsigned int GLSL parsing fixed
Unsigned integers in GLSL were being parsed using the regular
integer parser, so it was limited to INT_MAX. All values from
INT_MAX + 1 to UINT_MAX could not be parsed properly.
Also, added constant folding for the 4 bit conversion glsl
functions.
Fixes shader compilation issue in the Epic Zen Garden example:
https://s3.amazonaws.com/mozilla-games/ZenGarden/EpicZenGarden.html
(unfortunately, the screen is still black, so there are other
issues left)
Fixes WebGL 2 test: conformance2/glsl3/float-parsing.html
Change-Id: Iae52b2c8e083f0e1a22599e5a583297b9850444d
Reviewed-on: https://swiftshader-review.googlesource.com/16648
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
diff --git a/src/OpenGL/compiler/util.h b/src/OpenGL/compiler/util.h
index a5c4842..563407e 100644
--- a/src/OpenGL/compiler/util.h
+++ b/src/OpenGL/compiler/util.h
@@ -21,14 +21,18 @@
// atof_clamp is like atof but
// 1. it forces C locale, i.e. forcing '.' as decimal point.
-// 2. it clamps the value to -FLT_MAX or FLT_MAX if overflow happens.
+// 2. it sets the value to FLT_MAX if overflow happens.
// Return false if overflow happens.
bool atof_clamp(const char *str, float *value);
-// If overflow happens, clamp the value to INT_MIN or INT_MAX.
+// If overflow happens, value is set to INT_MAX.
// Return false if overflow happens.
bool atoi_clamp(const char *str, int *value);
+// If overflow happens, value is set to UINT_MAX.
+// Return false if overflow happens.
+bool atou_clamp(const char *str, unsigned int *value);
+
#ifdef __cplusplus
} // end extern "C"
#endif
