convert_float_int fix

The convert_float_int was not scaling the [0,1] value to the full
1.31 fixed-point range before clamping the value.

Fixes all failures in:
dEQP-GLES3.functional.state_query.floats*

Change-Id: Ic558eb45f1f351d3c30a0a5047a1b252edb56bd0
Reviewed-on: https://swiftshader-review.googlesource.com/14968
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>

src/OpenGL/libGLESv2/libGLESv2.cpp

diff --git a/src/OpenGL/libGLESv2/libGLESv2.cpp b/src/OpenGL/libGLESv2/libGLESv2.cpp
index b834e00..123e97c 100644
--- a/src/OpenGL/libGLESv2/libGLESv2.cpp
+++ b/src/OpenGL/libGLESv2/libGLESv2.cpp
@@ -3103,7 +3103,7 @@
 				{
 					if(pname == GL_DEPTH_RANGE || pname == GL_COLOR_CLEAR_VALUE || pname == GL_DEPTH_CLEAR_VALUE || pname == GL_BLEND_COLOR)
 					{
-						params[i] = convert_float_int(floatParams[i]);
+						params[i] = convert_float_fixed(floatParams[i]);
 					}
 					else
 					{

src/OpenGL/libGLESv2/libGLESv3.cpp

diff --git a/src/OpenGL/libGLESv2/libGLESv3.cpp b/src/OpenGL/libGLESv2/libGLESv3.cpp
index 6c7f7a8..7c28ee5 100644
--- a/src/OpenGL/libGLESv2/libGLESv3.cpp
+++ b/src/OpenGL/libGLESv2/libGLESv3.cpp
@@ -1898,7 +1898,7 @@
 				{
 					if(target == GL_DEPTH_RANGE || target == GL_COLOR_CLEAR_VALUE || target == GL_DEPTH_CLEAR_VALUE || target == GL_BLEND_COLOR)
 					{
-						data[i] = convert_float_int(floatParams[i]);
+						data[i] = convert_float_fixed(floatParams[i]);
 					}
 					else
 					{
@@ -3243,7 +3243,7 @@
 				{
 					if(pname == GL_DEPTH_RANGE || pname == GL_COLOR_CLEAR_VALUE || pname == GL_DEPTH_CLEAR_VALUE || pname == GL_BLEND_COLOR)
 					{
-						data[i] = (GLint64)(convert_float_int(floatParams[i]));
+						data[i] = (GLint64)(convert_float_fixed(floatParams[i]));
 					}
 					else
 					{
@@ -3326,7 +3326,7 @@
 				{
 					if(target == GL_DEPTH_RANGE || target == GL_COLOR_CLEAR_VALUE || target == GL_DEPTH_CLEAR_VALUE || target == GL_BLEND_COLOR)
 					{
-						data[i] = (GLint64)(convert_float_int(floatParams[i]));
+						data[i] = (GLint64)(convert_float_fixed(floatParams[i]));
 					}
 					else
 					{

src/OpenGL/libGLESv2/mathutil.h

diff --git a/src/OpenGL/libGLESv2/mathutil.h b/src/OpenGL/libGLESv2/mathutil.h
index 3c820a1..1b0280e 100644
--- a/src/OpenGL/libGLESv2/mathutil.h
+++ b/src/OpenGL/libGLESv2/mathutil.h
@@ -90,6 +90,11 @@
 
 	return static_cast<int>(roundf(x));
 }
+
+inline int convert_float_fixed(float x)
+{
+	return convert_float_int(static_cast<float>(0x7FFFFFFF) * x);
+}
 }
 
 #endif   // LIBGLESV2_MATHUTIL_H_