Pavel Ondračka
b4ca45911d
Otherwise nir_lower_int_to_float (or specifically nir_gather_ssa_types)
will fail to recognize we already have float constants and converts them
again.
Example from spec/glsl-1.10/execution/vs-loop-array-index-unroll.shader_test
with r300 driver (after enabling has_fused_comp_and_csel).
impl main {
block block_0:
/* preds: */
vec1 32 ssa_0 = load_const (0x00000000 = 0.000000)
vec4 32 ssa_1 = intrinsic load_input (ssa_0) (base=0, component=0, dest_type=float32, io location=VERT_ATTRIB_POS slots=1) /* gl_Vertex */
vec3 32 ssa_2 = load_const (0x00000000, 0x3e800000, 0x3f800000) = (0.000000, 0.250000, 1.000000)
vec3 32 ssa_3 = load_const (0x00000000, 0x3f000000, 0x3f800000) = (0.000000, 0.500000, 1.000000)
vec3 32 ssa_4 = load_const (0x00000000, 0x3f400000, 0x3f800000) = (0.000000, 0.750000, 1.000000)
vec2 32 ssa_5 = load_const (0x00000000, 0x3f800000) = (0.000000, 1.000000)
vec1 32 ssa_6 = load_const (0x3f800000 = 1.000000)
vec1 32 ssa_7 = intrinsic load_ubo_vec4 (ssa_0, ssa_0) (access=0, base=0, component=0)
vec4 32 ssa_8 = load_const (0x00000000, 0x00000001, 0x00000002, 0x00000003) = (0.000000, 0.000000, 0.000000, 0.000000)
vec4 1 ssa_9 = ilt ssa_8, ssa_7.xxxx
vec3 32 ssa_10 = bcsel ssa_9.www, ssa_5.xyy, ssa_4
vec3 32 ssa_11 = bcsel ssa_9.zzz, ssa_10, ssa_3
vec3 32 ssa_12 = bcsel ssa_9.yyy, ssa_11, ssa_2
vec3 32 ssa_15 = i32csel_gt ssa_7.xxx, ssa_12, ssa_6.xxx
vec4 32 ssa_14 = fsat ssa_15.xyxz
intrinsic store_output (ssa_14, ssa_0) (base=1, wrmask=xyzw, component=0, src_type=float32, io location=VARYING_SLOT_COL0 slots=1, xfb(), xfb2()) /* gl_FrontColor */
intrinsic store_output (ssa_1, ssa_0) (base=0, wrmask=xyzw, component=0, src_type=float32, io location=VARYING_SLOT_POS slots=1, xfb(), xfb2()) /* gl_Position */
/* succs: block_1 */
block block_1:
}
and after nir_lower_int_to_float
impl main {
block block_0:
/* preds: */
vec1 32 ssa_0 = load_const (0x00000000 = 0.000000)
vec4 32 ssa_1 = intrinsic load_input (ssa_0) (base=0, component=0, dest_type=float32, io location=VERT_ATTRIB_POS slots=1) /* gl_Vertex */
vec3 32 ssa_2 = load_const (0x00000000, 0x4e7a0000, 0x4e7e0000) = (0.000000, 1048576000.000000, 1065353216.000000)
vec3 32 ssa_3 = load_const (0x00000000, 0x4e7c0000, 0x4e7e0000) = (0.000000, 1056964608.000000, 1065353216.000000)
vec3 32 ssa_4 = load_const (0x00000000, 0x4e7d0000, 0x4e7e0000) = (0.000000, 1061158912.000000, 1065353216.000000)
vec2 32 ssa_5 = load_const (0x00000000, 0x4e7e0000) = (0.000000, 1065353216.000000)
vec1 32 ssa_6 = load_const (0x4e7e0000 = 1065353216.000000)
vec1 32 ssa_7 = intrinsic load_ubo_vec4 (ssa_0, ssa_0) (access=0, base=0, component=0)
vec4 32 ssa_8 = load_const (0x00000000, 0x3f800000, 0x40000000, 0x40400000) = (0.000000, 1.000000, 2.000000, 3.000000)
vec4 1 ssa_9 = flt ssa_8, ssa_7.xxxx
vec3 32 ssa_10 = bcsel ssa_9.www, ssa_5.xyy, ssa_4
vec3 32 ssa_11 = bcsel ssa_9.zzz, ssa_10, ssa_3
vec3 32 ssa_12 = bcsel ssa_9.yyy, ssa_11, ssa_2
vec3 32 ssa_13 = fcsel_gt ssa_7.xxx, ssa_12, ssa_6.xxx
vec4 32 ssa_14 = fsat ssa_13.xyxz
intrinsic store_output (ssa_14, ssa_0) (base=1, wrmask=xyzw, component=0, src_type=float32, io location=VARYING_SLOT_COL0 slots=1, xfb(), xfb2()) /* gl_FrontColor */
intrinsic store_output (ssa_1, ssa_0) (base=0, wrmask=xyzw, component=0, src_type=float32, io location=VARYING_SLOT_POS slots=1, xfb(), xfb2()) /* gl_Position */
/* succs: block_1 */
block block_1:
}
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23704>
`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_): .. code-block:: sh $ mkdir build $ cd build $ meson .. $ sudo ninja install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `OFTC's #dri-devel <irc://irc.oftc.net/dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.