-
Kenneth Graunke authored
GL_EXT_packed_float, 2.1.B Unsigned 10-Bit Floating-Point Numbers: 0.0, if E == 0 and M == 0, 2^-14 * (M / 32), if E == 0 and M != 0, 2^(E-15) * (1 + M/32), if 0 < E < 31, INF, if E == 31 and M == 0, or NaN, if E == 31 and M != 0, In the second case (E == 0 and M != 0), we were multiplying the mantissa by 2^-20, when we should have been multiplying by 2^-19 (which is 2^(-14 + -5), or 2^-14 * 2^-5, or 2^-14 / 32). The previous section defines the formula for 11-bit numbers, which is: 2^-14 * (M / 64), if E == 0 and M != 0, In other words, we had accidentally copy and pasted the 11-bit code to the 10-bit case, and neglected to change the exponent. Fixes dEQP-GLES3.functional.pbo.renderbuffer.r11f_g11f_b10f_triangles when run with surface dimensions of 1536x1152 or 1920x1080. Cc: mesa-stable@lists.freedesktop.org References: https://code.google.com/p/chrome-os-partner/issues/detail?id=56244 Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Stephane Marchesin <stephane.marchesin@gmail.com> Reviewed-by: Antia Puentes <apuentes@igalia.com>
01e99cba