/**
* Prepare/validate middle part of the vertex pipeline.
* NOTE: if you change this function, also look at the non-LLVM
* function fetch_pipeline_prepare() for similar changes.
*/
static void
llvm_middle_end_prepare( struct draw_pt_middle_end *middle,
unsigned in_prim,
unsigned opt,
unsigned *max_vertices )
{
struct llvm_middle_end *fpme = llvm_middle_end(middle);
struct draw_context *draw = fpme->draw;
struct draw_vertex_shader *vs = draw->vs.vertex_shader;
struct draw_geometry_shader *gs = draw->gs.geometry_shader;
const unsigned out_prim = gs ? gs->output_primitive :
u_assembled_prim(in_prim);
unsigned point_clip = draw->rasterizer->fill_front == PIPE_POLYGON_MODE_POINT ||
out_prim == PIPE_PRIM_POINTS;
unsigned nr;
fpme->input_prim = in_prim;
fpme->opt = opt;
draw_pt_post_vs_prepare( fpme->post_vs,
draw->clip_xy,
draw->clip_z,
draw->clip_user,
point_clip ? draw->guard_band_points_xy :
draw->guard_band_xy,
draw->identity_viewport,
draw->rasterizer->clip_halfz,
(draw->vs.edgeflag_output ? TRUE : FALSE) );
draw_pt_so_emit_prepare( fpme->so_emit, gs == NULL );
if (!(opt & PT_PIPELINE)) {
draw_pt_emit_prepare( fpme->emit,
out_prim,
max_vertices );
*max_vertices = MAX2( *max_vertices, 4096 );
}
else {
/* limit max fetches by limiting max_vertices */
*max_vertices = 4096;
}
/* Get the number of float[4] attributes per vertex.
* Note: this must be done after draw_pt_emit_prepare() since that
* can effect the vertex size.
*/
nr = MAX2(vs->info.num_inputs, draw_total_vs_outputs(draw));
/* Always leave room for the vertex header whether we need it or
* not. It's hard to get rid of it in particular because of the
* viewport code in draw_pt_post_vs.c.
*/
fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
/* Get the number of float[4] attributes per vertex.
* Note: this must be done after draw_pt_emit_prepare() since that
* can effect the vertex size.
*/
nr = MAX2(vs->info.num_inputs, draw_total_vs_outputs(draw));
/* Always leave room for the vertex header whether we need it or
* not. It's hard to get rid of it in particular because of the
* viewport code in draw_pt_post_vs.c.
*/
fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
/* return even number */
*max_vertices = *max_vertices & ~1;
/* Find/create the vertex shader variant */
{
struct draw_llvm_variant_key *key;
struct draw_llvm_variant *variant = NULL;
struct draw_llvm_variant_list_item *li;
struct llvm_vertex_shader *shader = llvm_vertex_shader(vs);
char store[DRAW_LLVM_MAX_VARIANT_KEY_SIZE];
unsigned i;
key = draw_llvm_make_variant_key(fpme->llvm, store);
/* Search shader's list of variants for the key */
li = first_elem(&shader->variants);
while (!at_end(&shader->variants, li)) {
if (memcmp(&li->base->key, key, shader->variant_key_size) == 0) {
variant = li->base;
break;
}
li = next_elem(li);
}
if (variant) {
/* found the variant, move to head of global list (for LRU) */
move_to_head(&fpme->llvm->vs_variants_list,
&variant->list_item_global);
}
else {
/* Need to create new variant */
/* First check if we've created too many variants. If so, free
* 25% of the LRU to avoid using too much memory.
*/
if (fpme->llvm->nr_variants >= DRAW_MAX_SHADER_VARIANTS) {
/*
* XXX: should we flush here ?
*/
for (i = 0; i < DRAW_MAX_SHADER_VARIANTS / 4; i++) {
struct draw_llvm_variant_list_item *item;
if (is_empty_list(&fpme->llvm->vs_variants_list)) {
break;
}
item = last_elem(&fpme->llvm->vs_variants_list);
assert(item);
assert(item->base);
draw_llvm_destroy_variant(item->base);
}
}
variant = draw_llvm_create_variant(fpme->llvm, nr, key);
if (variant) {
insert_at_head(&shader->variants, &variant->list_item_local);
insert_at_head(&fpme->llvm->vs_variants_list,
&variant->list_item_global);
fpme->llvm->nr_variants++;
shader->variants_cached++;
}
}
fpme->current_variant = variant;
}
if (gs) {
llvm_middle_end_prepare_gs(fpme);
}
}
static void
llvm_middle_end_prepare( struct draw_pt_middle_end *middle,
unsigned in_prim,
unsigned opt,
unsigned *max_vertices )
{
struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
struct draw_context *draw = fpme->draw;
struct llvm_vertex_shader *shader =
llvm_vertex_shader(draw->vs.vertex_shader);
char store[DRAW_LLVM_MAX_VARIANT_KEY_SIZE];
struct draw_llvm_variant_key *key;
struct draw_llvm_variant *variant = NULL;
struct draw_llvm_variant_list_item *li;
unsigned i;
unsigned instance_id_index = ~0;
const unsigned out_prim = (draw->gs.geometry_shader ?
draw->gs.geometry_shader->output_primitive :
in_prim);
/* Add one to num_outputs because the pipeline occasionally tags on
* an additional texcoord, eg for AA lines.
*/
const unsigned nr = MAX2( shader->base.info.num_inputs,
shader->base.info.num_outputs + 1 );
/* Scan for instanceID system value.
* XXX but we never use instance_id_index?!
*/
for (i = 0; i < shader->base.info.num_inputs; i++) {
if (shader->base.info.input_semantic_name[i] == TGSI_SEMANTIC_INSTANCEID) {
instance_id_index = i;
break;
}
}
fpme->input_prim = in_prim;
fpme->opt = opt;
/* Always leave room for the vertex header whether we need it or
* not. It's hard to get rid of it in particular because of the
* viewport code in draw_pt_post_vs.c.
*/
fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
/* XXX: it's not really gl rasterization rules we care about here,
* but gl vs dx9 clip spaces.
*/
draw_pt_post_vs_prepare( fpme->post_vs,
draw->clip_xy,
draw->clip_z,
draw->clip_user,
draw->identity_viewport,
(boolean)draw->rasterizer->gl_rasterization_rules,
(draw->vs.edgeflag_output ? TRUE : FALSE) );
draw_pt_so_emit_prepare( fpme->so_emit );
if (!(opt & PT_PIPELINE)) {
draw_pt_emit_prepare( fpme->emit,
out_prim,
max_vertices );
*max_vertices = MAX2( *max_vertices, 4096 );
}
else {
/* limit max fetches by limiting max_vertices */
*max_vertices = 4096;
}
/* return even number */
*max_vertices = *max_vertices & ~1;
key = draw_llvm_make_variant_key(fpme->llvm, store);
/* Search shader's list of variants for the key */
li = first_elem(&shader->variants);
while (!at_end(&shader->variants, li)) {
if (memcmp(&li->base->key, key, shader->variant_key_size) == 0) {
variant = li->base;
break;
}
li = next_elem(li);
}
if (variant) {
/* found the variant, move to head of global list (for LRU) */
move_to_head(&fpme->llvm->vs_variants_list, &variant->list_item_global);
}
else {
/* Need to create new variant */
unsigned i;
/* First check if we've created too many variants. If so, free
* 25% of the LRU to avoid using too much memory.
*/
if (fpme->llvm->nr_variants >= DRAW_MAX_SHADER_VARIANTS) {
/*
* XXX: should we flush here ?
*/
for (i = 0; i < DRAW_MAX_SHADER_VARIANTS / 4; i++) {
struct draw_llvm_variant_list_item *item =
last_elem(&fpme->llvm->vs_variants_list);
draw_llvm_destroy_variant(item->base);
}
}
variant = draw_llvm_create_variant(fpme->llvm, nr, key);
if (variant) {
insert_at_head(&shader->variants, &variant->list_item_local);
insert_at_head(&fpme->llvm->vs_variants_list, &variant->list_item_global);
fpme->llvm->nr_variants++;
shader->variants_cached++;
}
}
fpme->current_variant = variant;
/*XXX we only support one constant buffer */
fpme->llvm->jit_context.vs_constants =
draw->pt.user.vs_constants[0];
fpme->llvm->jit_context.gs_constants =
draw->pt.user.gs_constants[0];
fpme->llvm->jit_context.planes =
(float (*) [12][4]) draw->pt.user.planes[0];
fpme->llvm->jit_context.viewport =
(float *)draw->viewport.scale;
}