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[require]
GLSL >= 1.50
GL_ARB_gpu_shader_fp64
[vertex shader]
#version 130
in vec4 vertex;
void main() {
gl_Position = vertex;
}
[fragment shader]
#version 150
#extension GL_ARB_gpu_shader_fp64 : enable
out vec4 color;
uniform dvec4 expected_double;
uniform dvec4 given_double;
uniform ivec4 given_exponent;
void main()
{
int i;
dvec4 result;
/* Green if both pass. */
color = vec4(0.0, 0.0, 0.0, 0.0);
/* Compare the results after going through floatBitsToInt() allows us
* to distinguish -0.0f from 0.0f.
*/
result = ldexp(given_double, given_exponent);
for (i = 0; i < 4; i++) {
if (unpackDouble2x32(expected_double[i]) !=
unpackDouble2x32(result[i])) {
color[i] = 1.0;
}
}
}
[vertex data]
vertex/float/2
-1.0 -1.0
1.0 -1.0
1.0 1.0
-1.0 1.0
[test]
# Basic tests with exponent = 0.
uniform dvec4 expected_double 0.0 -0.0 0.5 -0.5
uniform dvec4 given_double 0.0 -0.0 0.5 -0.5
uniform ivec4 given_exponent 0 0 0 0
#draw arrays GL_TRIANGLE_FAN 0 4
#probe rgba 0 0 0.0 0.0 0.0 0.0
# Basic tests.
uniform dvec4 expected_double 0.49 1.0 25.0 100
uniform dvec4 given_double 0.98 0.5 0.78125 0.78125
uniform ivec4 given_exponent -1 1 5 7
draw arrays GL_TRIANGLE_FAN 0 4
probe rgba 1 0 0.0 0.0 0.0 0.0
# Test generating FLT_MIN (1.1754944e-38) and FLT_MAX (3.40282347e38).
uniform dvec4 expected_double 1.1754943508222875e-38 -1.1754943508222875e-38 3.4028234699999998e+38 -3.4028234699999998e+38
uniform dvec4 given_double 0.5 -0.5 0.99999994145762339 -0.99999994145762339
uniform ivec4 given_exponent -125 -125 128 128
draw arrays GL_TRIANGLE_FAN 0 4
probe rgba 2 0 0.0 0.0 0.0 0.0
# Test FLT_MIN (1.1754944e-38) and FLT_MAX (3.40282347e38) as inputs.
uniform dvec4 expected_double 0.5 -0.5 0.99999994145762339 -0.99999994145762339
uniform dvec4 given_double 1.1754943508222875e-38 -1.1754943508222875e-38 3.4028234699999998e+38 -3.4028234699999998e+38
uniform ivec4 given_exponent 125 125 -128 -128
draw arrays GL_TRIANGLE_FAN 0 4
probe rgba 3 0 0.0 0.0 0.0 0.0
# Test DBL_MIN (2.2250738585072014E-308) and DBL_MAX (1.7976931348623157E+308)
uniform dvec4 expected_double 2.2250738585072014e-308 -2.2250738585072014e-308 1.7976931348623157e+308 -1.7976931348623157e+308
uniform dvec4 given_double 0.5 -0.5 0.99999999999999989 -0.99999999999999989
uniform ivec4 given_exponent -1021 -1021 1024 1024
draw arrays GL_TRIANGLE_FAN 0 4
probe rgba 4 0 0.0 0.0 0.0 0.0
# Test DBL_MIN (2.2250738585072014E-308) and DBL_MAX (1.7976931348623157E+308) as inputs.
uniform dvec4 expected_double 0.5 -0.5 0.99999999999999989 -0.99999999999999989
uniform dvec4 given_double 2.2250738585072014E-308 -2.2250738585072014E-308 1.7976931348623157E+308 -1.7976931348623157E+308
uniform ivec4 given_exponent 1021 1021 -1024 -1024
draw arrays GL_TRIANGLE_FAN 0 4
probe rgba 5 0 0.0 0.0 0.0 0.0
# Test underflow generates zero with sign of x.
uniform dvec4 expected_double 0.0 -0.0 0.0 -0.0
uniform dvec4 given_double 0.0 -0.0 0.5 -0.5
uniform ivec4 given_exponent -1028 -1028 -1078 -1078
draw arrays GL_TRIANGLE_FAN 0 4
probe rgba 6 0 0.0 0.0 0.0 0.0
uniform dvec4 expected_double 0.0 -0.0 0.0 -0.0
uniform dvec4 given_double 2.2250738585072014E-308 -2.2250738585072014E-308 1.7976931348623157E+308 -1.7976931348623157E+308
uniform ivec4 given_exponent -53 -53 -2100 -2100
draw arrays GL_TRIANGLE_FAN 0 4
probe rgba 7 0 0.0 0.0 0.0 0.0
# Overflow is undefined according to the GLSL spec, so nothing to test.
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