pan/midgard: Improve scheduling

Make scalar scheduling onto vector units more aggressive (it can only
help while we schedule strictly in order). Also, allow imov on VLUT.

total bundles in shared programs: 2176 -> 2117 (-2.71%)
bundles in affected programs: 901 -> 842 (-6.55%)
helped: 24
HURT: 0
helped stats (abs) min: 1 max: 18 x̄: 2.46 x̃: 2
helped stats (rel) min: 2.08% max: 20.00% x̄: 8.68% x̃: 5.94%
95% mean confidence interval for bundles value: -3.93 -0.99
95% mean confidence interval for bundles %-change: -10.92% -6.45%
Bundles are helped.

total quadwords in shared programs: 3605 -> 3566 (-1.08%)
quadwords in affected programs: 1984 -> 1945 (-1.97%)
helped: 28
HURT: 5
helped stats (abs) min: 1 max: 3 x̄: 1.68 x̃: 2
helped stats (rel) min: 1.02% max: 14.29% x̄: 5.12% x̃: 2.94%
HURT stats (abs)   min: 1 max: 3 x̄: 1.60 x̃: 1
HURT stats (rel)   min: 0.57% max: 9.09% x̄: 6.40% x̃: 9.09%
95% mean confidence interval for quadwords value: -1.67 -0.69
95% mean confidence interval for quadwords %-change: -5.37% -1.37%
Quadwords are helped.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>

diff --git a/src/panfrost/midgard/midgard_ops.c b/src/panfrost/midgard/midgard_ops.c
index ccd750c..6365652 100644 (file)
--- a/src/panfrost/midgard/midgard_ops.c
+++ b/src/panfrost/midgard/midgard_ops.c
@@ -73,7 +73,7 @@ struct mir_op_props alu_opcode_props[256] = {
         [midgard_alu_op_isubsat]        = {"isubsat", UNITS_MOST},
         [midgard_alu_op_usubsat]        = {"usubsat", UNITS_MOST},
         [midgard_alu_op_imul]           = {"imul", UNITS_MUL | OP_COMMUTES},
-        [midgard_alu_op_imov]           = {"imov", UNITS_MOST | QUIRK_FLIPPED_R24},
+        [midgard_alu_op_imov]           = {"imov", UNITS_ALL | QUIRK_FLIPPED_R24},
 
         /* For vector comparisons, use ball etc */
         [midgard_alu_op_feq]            = {"feq", UNITS_MOST | OP_TYPE_CONVERT | OP_COMMUTES},

diff --git a/src/panfrost/midgard/midgard_schedule.c b/src/panfrost/midgard/midgard_schedule.c
index 3bf656d..e180a1d 100644 (file)
--- a/src/panfrost/midgard/midgard_schedule.c
+++ b/src/panfrost/midgard/midgard_schedule.c
@@ -327,12 +327,16 @@ schedule_bundle(compiler_context *ctx, midgard_block *block, midgard_instruction
                                                 else
                                                         break;
                                         } else {
-                                                if ((units & UNIT_SADD) && !(control & UNIT_SADD) && !midgard_has_hazard(segment, segment_size, ains))
+                                                if ((units & UNIT_VMUL) && (last_unit < UNIT_VMUL))
+                                                        unit = UNIT_VMUL;
+                                                else if ((units & UNIT_SADD) && !(control & UNIT_SADD) && !midgard_has_hazard(segment, segment_size, ains))
                                                         unit = UNIT_SADD;
-                                                else if (units & UNIT_SMUL)
-                                                        unit = ((units & UNIT_VMUL) && !(last_unit >= UNIT_VMUL)) ? UNIT_VMUL : UNIT_SMUL;
-                                                else if ((units & UNIT_VADD) && !(control & UNIT_VADD))
+                                                else if (units & UNIT_VADD)
                                                         unit = UNIT_VADD;
+                                                else if (units & UNIT_SMUL)
+                                                        unit = UNIT_SMUL;
+                                                else if (units & UNIT_VLUT)
+                                                        unit = UNIT_VLUT;
                                                 else
                                                         break;
                                         }