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authorDave Airlie <[email protected]>2016-04-26 14:30:31 +1000
committerDave Airlie <[email protected]>2016-04-27 09:00:44 +1000
commitfbea4e177f12cd8655a26711af7e61c784bfa267 (patch)
treefcd470b61bdb738f894cb2772efee3bbb83c9c45 /src/gallium/auxiliary
parent8ffa3c58d4bfec789872c58a16da4af4352119f3 (diff)
tgsi/exec: implement restartable machine.
This lets us restart the machine at a PC value, and exits the machine when we hit a barrier. Compute shaders will then execute all the threads up to the barrier, then restart the machines after the barrier once all are done. v2: comment the code a bit, change return types. Acked-by: Roland Scheidegger <[email protected]> Signed-off-by: Dave Airlie <[email protected]>
Diffstat (limited to 'src/gallium/auxiliary')
-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_exec.c50
-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_exec.h2
2 files changed, 35 insertions, 17 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 9348528c42a..717ead947e7 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -4821,7 +4821,12 @@ micro_umsb(union tgsi_exec_channel *dst,
dst->i[3] = util_last_bit(src->u[3]) - 1;
}
-static void
+/**
+ * Execute a TGSI instruction.
+ * Returns TRUE if a barrier instruction is hit,
+ * otherwise FALSE.
+ */
+static boolean
exec_instruction(
struct tgsi_exec_machine *mach,
const struct tgsi_full_instruction *inst,
@@ -5140,7 +5145,7 @@ exec_instruction(
mach->CondStackTop = 0;
mach->LoopStackTop = 0;
*pc = -1;
- return;
+ return FALSE;
}
assert(mach->CallStackTop > 0);
@@ -5789,10 +5794,12 @@ exec_instruction(
break;
case TGSI_OPCODE_BARRIER:
case TGSI_OPCODE_MEMBAR:
+ return TRUE;
break;
default:
assert( 0 );
}
+ return FALSE;
}
static void
@@ -5836,13 +5843,16 @@ uint
tgsi_exec_machine_run( struct tgsi_exec_machine *mach, int start_pc )
{
uint i;
- int pc = 0;
- tgsi_exec_machine_setup_masks(mach);
+ mach->pc = start_pc;
+
+ if (!start_pc) {
+ tgsi_exec_machine_setup_masks(mach);
- /* execute declarations (interpolants) */
- for (i = 0; i < mach->NumDeclarations; i++) {
- exec_declaration( mach, mach->Declarations+i );
+ /* execute declarations (interpolants) */
+ for (i = 0; i < mach->NumDeclarations; i++) {
+ exec_declaration( mach, mach->Declarations+i );
+ }
}
{
@@ -5851,24 +5861,30 @@ tgsi_exec_machine_run( struct tgsi_exec_machine *mach, int start_pc )
struct tgsi_exec_vector outputs[PIPE_MAX_ATTRIBS];
uint inst = 1;
- memset(mach->Temps, 0, sizeof(temps));
- if (mach->Outputs)
- memset(mach->Outputs, 0, sizeof(outputs));
- memset(temps, 0, sizeof(temps));
- memset(outputs, 0, sizeof(outputs));
+ if (!start_pc) {
+ memset(mach->Temps, 0, sizeof(temps));
+ if (mach->Outputs)
+ memset(mach->Outputs, 0, sizeof(outputs));
+ memset(temps, 0, sizeof(temps));
+ memset(outputs, 0, sizeof(outputs));
+ }
#endif
/* execute instructions, until pc is set to -1 */
- while (pc != -1) {
-
+ while (mach->pc != -1) {
+ boolean barrier_hit;
#if DEBUG_EXECUTION
uint i;
- tgsi_dump_instruction(&mach->Instructions[pc], inst++);
+ tgsi_dump_instruction(&mach->Instructions[mach->pc], inst++);
#endif
- assert(pc < (int) mach->NumInstructions);
- exec_instruction(mach, mach->Instructions + pc, &pc);
+ assert(mach->pc < (int) mach->NumInstructions);
+ barrier_hit = exec_instruction(mach, mach->Instructions + mach->pc, &mach->pc);
+
+ /* for compute shaders if we hit a barrier return now for later rescheduling */
+ if (barrier_hit && mach->ShaderType == PIPE_SHADER_COMPUTE)
+ return 0;
#if DEBUG_EXECUTION
for (i = 0; i < TGSI_EXEC_NUM_TEMPS + TGSI_EXEC_NUM_TEMP_EXTRAS; i++) {
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.h b/src/gallium/auxiliary/tgsi/tgsi_exec.h
index 564b3d5d5cc..9343d788db7 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.h
@@ -445,6 +445,8 @@ struct tgsi_exec_machine
SamplerViews[PIPE_MAX_SHADER_SAMPLER_VIEWS];
boolean UsedGeometryShader;
+
+ int pc;
};
struct tgsi_exec_machine *