SPIRV-Cross/reference/shaders-msl/comp/bitfield.noopt.comp
Hans-Kristian Arntzen 3ce6b2a23b Make bitfield test noopt for now.
SPIRV-Tools trips assertion.
2017-11-23 09:59:25 +01:00

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#pragma clang diagnostic ignored "-Wmissing-prototypes"
#include <metal_stdlib>
#include <simd/simd.h>
using namespace metal;
// Implementation of the GLSL findLSB() function
template<typename T>
T findLSB(T x)
{
return select(ctz(x), T(-1), x == T(0));
}
// Implementation of the signed GLSL findMSB() function
template<typename T>
T findSMSB(T x)
{
T v = select(x, T(-1) - x, x < T(0));
return select(clz(T(0)) - (clz(v) + T(1)), T(-1), v == T(0));
}
// Implementation of the unsigned GLSL findMSB() function
template<typename T>
T findUMSB(T x)
{
return select(clz(T(0)) - (clz(x) + T(1)), T(-1), x == T(0));
}
kernel void main0()
{
int signed_value = 0;
uint unsigned_value = 0u;
int s = extract_bits(signed_value, 5, 20);
uint u = extract_bits(unsigned_value, 6, 21);
s = insert_bits(s, 40, 5, 4);
u = insert_bits(u, 60u, 5, 4);
u = reverse_bits(u);
s = reverse_bits(s);
int v0 = popcount(u);
int v1 = popcount(s);
int v2 = findUMSB(u);
int v3 = findSMSB(s);
int v4 = findLSB(u);
int v5 = findLSB(s);
}