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/*
* Copyright (C) 2020 Collabora Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors (Collabora):
* Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
*/
#include "pan_ir.h"
/* TODO: ssbo_size */
static int
panfrost_sysval_for_ssbo(nir_intrinsic_instr *instr)
{
nir_src index = instr->src[0];
assert(nir_src_is_const(index));
uint32_t uindex = nir_src_as_uint(index);
return PAN_SYSVAL(SSBO, uindex);
}
static int
panfrost_sysval_for_sampler(nir_intrinsic_instr *instr)
{
/* TODO: indirect samplers !!! */
nir_src index = instr->src[0];
assert(nir_src_is_const(index));
uint32_t uindex = nir_src_as_uint(index);
return PAN_SYSVAL(SAMPLER, uindex);
}
static unsigned
panfrost_nir_sysval_for_intrinsic(nir_intrinsic_instr *instr)
{
switch (instr->intrinsic) {
case nir_intrinsic_load_viewport_scale:
return PAN_SYSVAL_VIEWPORT_SCALE;
case nir_intrinsic_load_viewport_offset:
return PAN_SYSVAL_VIEWPORT_OFFSET;
case nir_intrinsic_load_num_work_groups:
return PAN_SYSVAL_NUM_WORK_GROUPS;
case nir_intrinsic_load_ssbo_address:
case nir_intrinsic_get_buffer_size:
return panfrost_sysval_for_ssbo(instr);
case nir_intrinsic_load_sampler_lod_parameters_pan:
return panfrost_sysval_for_sampler(instr);
default:
return ~0;
}
}
int
panfrost_sysval_for_instr(nir_instr *instr, nir_dest *dest)
{
nir_intrinsic_instr *intr;
nir_dest *dst = NULL;
nir_tex_instr *tex;
unsigned sysval = ~0;
switch (instr->type) {
case nir_instr_type_intrinsic:
intr = nir_instr_as_intrinsic(instr);
sysval = panfrost_nir_sysval_for_intrinsic(intr);
dst = &intr->dest;
break;
case nir_instr_type_tex:
tex = nir_instr_as_tex(instr);
if (tex->op != nir_texop_txs)
break;
sysval = PAN_SYSVAL(TEXTURE_SIZE,
PAN_TXS_SYSVAL_ID(tex->texture_index,
nir_tex_instr_dest_size(tex) -
(tex->is_array ? 1 : 0),
tex->is_array));
dst = &tex->dest;
break;
default:
break;
}
if (dest && dst)
*dest = *dst;
return sysval;
}
static void
panfrost_nir_assign_sysval_body(struct panfrost_sysvals *ctx, nir_instr *instr)
{
int sysval = panfrost_sysval_for_instr(instr, NULL);
if (sysval < 0)
return;
/* We have a sysval load; check if it's already been assigned */
if (_mesa_hash_table_u64_search(ctx->sysval_to_id, sysval))
return;
/* It hasn't -- so assign it now! */
unsigned id = ctx->sysval_count++;
_mesa_hash_table_u64_insert(ctx->sysval_to_id, sysval, (void *) ((uintptr_t) id + 1));
ctx->sysvals[id] = sysval;
}
void
panfrost_nir_assign_sysvals(struct panfrost_sysvals *ctx, nir_shader *shader)
{
ctx->sysval_count = 0;
ctx->sysval_to_id = _mesa_hash_table_u64_create(NULL);
nir_foreach_function(function, shader) {
if (!function->impl) continue;
nir_foreach_block(block, function->impl) {
nir_foreach_instr_safe(instr, block) {
panfrost_nir_assign_sysval_body(ctx, instr);
}
}
}
}
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