GL_ATI_texture_float
http://www.opengl.org/registry/specs/ATI/texture_float.txt
GL_ATI_texture_float
GL_RGBA_FLOAT32_ATI 0x8814
GL_RGB_FLOAT32_ATI 0x8815
GL_ALPHA_FLOAT32_ATI 0x8816
GL_INTENSITY_FLOAT32_ATI 0x8817
GL_LUMINANCE_FLOAT32_ATI 0x8818
GL_LUMINANCE_ALPHA_FLOAT32_ATI 0x8819
GL_RGBA_FLOAT16_ATI 0x881A
GL_RGB_FLOAT16_ATI 0x881B
GL_ALPHA_FLOAT16_ATI 0x881C
GL_INTENSITY_FLOAT16_ATI 0x881D
GL_LUMINANCE_FLOAT16_ATI 0x881E
GL_LUMINANCE_ALPHA_FLOAT16_ATI 0x881F