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i965: Reorganize prog_data->total_scratch code a bit.

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Cc: "12.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
(cherry picked from commit 40013c5033)
This commit is contained in:
Kenneth Graunke 2016-06-13 23:09:31 -07:00 • committed by Emil Velikov
parent 5e0b11cb6d
commit 2e8129ddf8
1 changed files with 19 additions and 16 deletions
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35
src/mesa/drivers/dri/i965/brw_fs.cpp
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@ -5989,23 +5989,26 @@ fs_visitor::allocate_registers(bool allow_spilling)
schedule_instructions(SCHEDULE_POST);
if (last_scratch > 0) {
unsigned max_scratch_size = 2 * 1024 * 1024;
prog_data->total_scratch = brw_get_scratch_size(last_scratch);
if (devinfo->is_haswell && stage == MESA_SHADER_COMPUTE) {
/* According to the MEDIA_VFE_STATE's "Per Thread Scratch Space"
* field documentation, Haswell supports a minimum of 2kB of
* scratch space for compute shaders, unlike every other stage
* and platform.
*/
prog_data->total_scratch = MAX2(prog_data->total_scratch, 2048);
} else if (devinfo->gen <= 7 && stage == MESA_SHADER_COMPUTE) {
/* According to the MEDIAVFE_STATE's "Per Thread Scratch Space"
* field documentation, platforms prior to Haswell measure scratch
* size linearly with a range of [1kB, 12kB] and 1kB granularity.
*/
prog_data->total_scratch = ALIGN(last_scratch, 1024);
assert(prog_data->total_scratch < 12 * 1024);
if (stage == MESA_SHADER_COMPUTE) {
if (devinfo->is_haswell) {
/* According to the MEDIA_VFE_STATE's "Per Thread Scratch Space"
* field documentation, Haswell supports a minimum of 2kB of
* scratch space for compute shaders, unlike every other stage
* and platform.
*/
prog_data->total_scratch = MAX2(prog_data->total_scratch, 2048);
} else if (devinfo->gen <= 7) {
/* According to the MEDIA_VFE_STATE's "Per Thread Scratch Space"
* field documentation, platforms prior to Haswell measure scratch
* size linearly with a range of [1kB, 12kB] and 1kB granularity.
*/
prog_data->total_scratch = ALIGN(last_scratch, 1024);
max_scratch_size = 12 * 1024;
}
}
/* We currently only support up to 2MB of scratch space. If we
@ -6018,7 +6021,7 @@ fs_visitor::allocate_registers(bool allow_spilling)
* See 3D-Media-GPGPU Engine > Media GPGPU Pipeline >
* Thread Group Tracking > Local Memory/Scratch Space.
*/
assert(prog_data->total_scratch < 2 * 1024 * 1024);
assert(prog_data->total_scratch < max_scratch_size);
}
}