ec4 bitfieldInsert(ivec4 base, ivec4, int, int); uint bitfieldInsert( uint base,  uint, int, int);uvec2 bitfieldInsert(uvec2 base, uvec2, int, int);uvec3 bitfieldInsert(uvec3 base, uvec3, int, int);uvec4 bitfieldInsert(uvec4 base, uvec4, int, int);