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tgsi: add support for geometry shader streams.

Browse source 
This adds support to retrieve the primitive counts
for each stream, along with the offset for each
primitive into the output array.

It also adds support for parsing the stream argument
to the emit and end instructions.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2015-05-27 17:35:32 +10:00 • committed by Dave Airlie
parent 333746011d
commit 00fe67c015
3 changed files with 61 additions and 17 deletions
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6
src/gallium/auxiliary/draw/draw_gs.c
View file

@ -89,9 +89,9 @@ tgsi_fetch_gs_outputs(struct draw_geometry_shader *shader,
*/
for (prim_idx = 0; prim_idx < num_primitives; ++prim_idx) {
unsigned num_verts_per_prim = machine->Primitives[prim_idx];
unsigned num_verts_per_prim = machine->Primitives[prim_idx][0];
shader->primitive_lengths[prim_idx + shader->emitted_primitives] =
machine->Primitives[prim_idx];
machine->Primitives[prim_idx][0];
shader->emitted_vertices += num_verts_per_prim;
for (j = 0; j < num_verts_per_prim; j++, current_idx++) {
int idx = current_idx * shader->info.num_outputs;
@ -696,7 +696,7 @@ draw_gs_init( struct draw_context *draw )
if (!draw->gs.tgsi.machine)
return FALSE;
draw->gs.tgsi.machine->Primitives = align_malloc(
draw->gs.tgsi.machine->Primitives[0] = align_malloc(
MAX_PRIMITIVES * sizeof(struct tgsi_exec_vector), 16);
if (!draw->gs.tgsi.machine->Primitives)
return FALSE;

58
src/gallium/auxiliary/tgsi/tgsi_exec.c
View file

@ -948,7 +948,22 @@ enum tgsi_exec_datatype {
#define TEMP_OUTPUT_C TGSI_EXEC_TEMP_OUTPUT_C
#define TEMP_PRIMITIVE_I TGSI_EXEC_TEMP_PRIMITIVE_I
#define TEMP_PRIMITIVE_C TGSI_EXEC_TEMP_PRIMITIVE_C
#define TEMP_PRIMITIVE_S1_I TGSI_EXEC_TEMP_PRIMITIVE_S1_I
#define TEMP_PRIMITIVE_S1_C TGSI_EXEC_TEMP_PRIMITIVE_S1_C
#define TEMP_PRIMITIVE_S2_I TGSI_EXEC_TEMP_PRIMITIVE_S2_I
#define TEMP_PRIMITIVE_S2_C TGSI_EXEC_TEMP_PRIMITIVE_S2_C
#define TEMP_PRIMITIVE_S3_I TGSI_EXEC_TEMP_PRIMITIVE_S3_I
#define TEMP_PRIMITIVE_S3_C TGSI_EXEC_TEMP_PRIMITIVE_S3_C
static const struct {
int idx;
int chan;
} temp_prim_idxs[] = {
{ TEMP_PRIMITIVE_I, TEMP_PRIMITIVE_C },
{ TEMP_PRIMITIVE_S1_I, TEMP_PRIMITIVE_S1_C },
{ TEMP_PRIMITIVE_S2_I, TEMP_PRIMITIVE_S2_C },
{ TEMP_PRIMITIVE_S3_I, TEMP_PRIMITIVE_S3_C },
};
/** The execution mask depends on the conditional mask and the loop mask */
#define UPDATE_EXEC_MASK(MACH) \
@ -2055,35 +2070,52 @@ exec_kill(struct tgsi_exec_machine *mach)
}
static void
emit_vertex(struct tgsi_exec_machine *mach)
emit_vertex(struct tgsi_exec_machine *mach,
const struct tgsi_full_instruction *inst)
{
union tgsi_exec_channel r[1];
unsigned stream_id;
unsigned *prim_count;
/* FIXME: check for exec mask correctly
unsigned i;
for (i = 0; i < TGSI_QUAD_SIZE; ++i) {
if ((mach->ExecMask & (1 << i)))
*/
IFETCH(&r[0], 0, TGSI_CHAN_X);
stream_id = r[0].u[0];
prim_count = &mach->Temps[temp_prim_idxs[stream_id].idx].xyzw[temp_prim_idxs[stream_id].chan].u[0];
if (mach->ExecMask) {
if (mach->Primitives[mach->Temps[TEMP_PRIMITIVE_I].xyzw[TEMP_PRIMITIVE_C].u[0]] >= mach->MaxOutputVertices)
if (mach->Primitives[stream_id][*prim_count] >= mach->MaxOutputVertices)
return;
if (mach->Primitives[stream_id][*prim_count] == 0)
mach->PrimitiveOffsets[stream_id][*prim_count] = mach->Temps[TEMP_OUTPUT_I].xyzw[TEMP_OUTPUT_C].u[0];
mach->Temps[TEMP_OUTPUT_I].xyzw[TEMP_OUTPUT_C].u[0] += mach->NumOutputs;
mach->Primitives[mach->Temps[TEMP_PRIMITIVE_I].xyzw[TEMP_PRIMITIVE_C].u[0]]++;
mach->Primitives[stream_id][*prim_count]++;
}
}
static void
emit_primitive(struct tgsi_exec_machine *mach)
emit_primitive(struct tgsi_exec_machine *mach,
const struct tgsi_full_instruction *inst)
{
unsigned *prim_count = &mach->Temps[TEMP_PRIMITIVE_I].xyzw[TEMP_PRIMITIVE_C].u[0];
unsigned *prim_count;
union tgsi_exec_channel r[1];
unsigned stream_id = 0;
/* FIXME: check for exec mask correctly
unsigned i;
for (i = 0; i < TGSI_QUAD_SIZE; ++i) {
if ((mach->ExecMask & (1 << i)))
*/
if (inst) {
IFETCH(&r[0], 0, TGSI_CHAN_X);
stream_id = r[0].u[0];
}
prim_count = &mach->Temps[temp_prim_idxs[stream_id].idx].xyzw[temp_prim_idxs[stream_id].chan].u[0];
if (mach->ExecMask) {
++(*prim_count);
debug_assert((*prim_count * mach->NumOutputs) < mach->MaxGeometryShaderOutputs);
mach->Primitives[*prim_count] = 0;
mach->Primitives[stream_id][*prim_count] = 0;
}
}
@ -2092,9 +2124,9 @@ conditional_emit_primitive(struct tgsi_exec_machine *mach)
{
if (PIPE_SHADER_GEOMETRY == mach->ShaderType) {
int emitted_verts =
mach->Primitives[mach->Temps[TEMP_PRIMITIVE_I].xyzw[TEMP_PRIMITIVE_C].u[0]];
mach->Primitives[0][mach->Temps[temp_prim_idxs[0].idx].xyzw[temp_prim_idxs[0].chan].u[0]];
if (emitted_verts) {
emit_primitive(mach);
emit_primitive(mach, NULL);
}
}
}
@ -5529,11 +5561,11 @@ exec_instruction(
break;
case TGSI_OPCODE_EMIT:
emit_vertex(mach);
emit_vertex(mach, inst);
break;
case TGSI_OPCODE_ENDPRIM:
emit_primitive(mach);
emit_primitive(mach, inst);
break;
case TGSI_OPCODE_BGNLOOP:
@ -6119,8 +6151,10 @@ tgsi_exec_machine_setup_masks(struct tgsi_exec_machine *mach)
mach->Temps[TEMP_OUTPUT_I].xyzw[TEMP_OUTPUT_C].u[0] = 0;
if (mach->ShaderType == PIPE_SHADER_GEOMETRY) {
mach->Temps[TEMP_PRIMITIVE_I].xyzw[TEMP_PRIMITIVE_C].u[0] = 0;
mach->Primitives[0] = 0;
for (unsigned i = 0; i < TGSI_MAX_VERTEX_STREAMS; i++) {
mach->Temps[temp_prim_idxs[i].idx].xyzw[temp_prim_idxs[i].chan].u[0] = 0;
mach->Primitives[i][0] = 0;
}
/* GS runs on a single primitive for now */
default_mask = 0x1;
}

14
src/gallium/auxiliary/tgsi/tgsi_exec.h
View file

@ -281,7 +281,14 @@ struct tgsi_sampler
#define TGSI_EXEC_TEMP_ADDR (TGSI_EXEC_NUM_TEMPS + 8)
#define TGSI_EXEC_NUM_ADDRS 3
#define TGSI_EXEC_NUM_TEMP_EXTRAS 12
#define TGSI_EXEC_TEMP_PRIMITIVE_S1_I (TGSI_EXEC_NUM_TEMPS + 11)
#define TGSI_EXEC_TEMP_PRIMITIVE_S1_C 0
#define TGSI_EXEC_TEMP_PRIMITIVE_S2_I (TGSI_EXEC_NUM_TEMPS + 12)
#define TGSI_EXEC_TEMP_PRIMITIVE_S2_C 1
#define TGSI_EXEC_TEMP_PRIMITIVE_S3_I (TGSI_EXEC_NUM_TEMPS + 13)
#define TGSI_EXEC_TEMP_PRIMITIVE_S3_C 2
#define TGSI_EXEC_NUM_TEMP_EXTRAS 14
@ -312,6 +319,8 @@ struct tgsi_sampler
#define TGSI_MAX_MISC_INPUTS 8
#define TGSI_MAX_VERTEX_STREAMS 4
/** function call/activation record */
struct tgsi_call_record
{
@ -377,7 +386,8 @@ struct tgsi_exec_machine
enum pipe_shader_type ShaderType; /**< PIPE_SHADER_x */
/* GEOMETRY processor only. */
unsigned *Primitives;
unsigned *Primitives[TGSI_MAX_VERTEX_STREAMS];
unsigned *PrimitiveOffsets[TGSI_MAX_VERTEX_STREAMS];
unsigned NumOutputs;
unsigned MaxGeometryShaderOutputs;
unsigned MaxOutputVertices;