v3d: Move "does this instruction have flags" from sched to generic helpers.

I wanted to reuse it for DCE of flags updates.

2 files changed, 43 insertions, 0 deletions

diff --git a/src/broadcom/qpu/qpu_instr.c b/src/broadcom/qpu/qpu_instr.c
index 08f29a40937..338a1887f03 100644
--- a/src/broadcom/qpu/qpu_instr.c
+++ b/src/broadcom/qpu/qpu_instr.c
@@ -809,3 +809,44 @@ v3d_qpu_sig_writes_address(const struct v3d_device_info *devinfo,
                 sig->ldtlb ||
                 sig->ldtlbu);
 }
+
+bool
+v3d_qpu_reads_flags(const struct v3d_qpu_instr *inst)
+{
+        if (inst->type == V3D_QPU_INSTR_TYPE_BRANCH) {
+                return inst->branch.cond != V3D_QPU_BRANCH_COND_ALWAYS;
+        } else if (inst->type == V3D_QPU_INSTR_TYPE_ALU) {
+                if (inst->flags.ac != V3D_QPU_COND_NONE ||
+                    inst->flags.mc != V3D_QPU_COND_NONE ||
+                    inst->flags.auf != V3D_QPU_UF_NONE ||
+                    inst->flags.muf != V3D_QPU_UF_NONE)
+                        return true;
+
+                switch (inst->alu.add.op) {
+                case V3D_QPU_A_VFLA:
+                case V3D_QPU_A_VFLNA:
+                case V3D_QPU_A_VFLB:
+                case V3D_QPU_A_VFLNB:
+                case V3D_QPU_A_FLAPUSH:
+                case V3D_QPU_A_FLBPUSH:
+                        return true;
+                default:
+                        break;
+                }
+        }
+
+        return false;
+}
+
+bool
+v3d_qpu_writes_flags(const struct v3d_qpu_instr *inst)
+{
+        if (inst->flags.apf != V3D_QPU_PF_NONE ||
+            inst->flags.mpf != V3D_QPU_PF_NONE ||
+            inst->flags.auf != V3D_QPU_UF_NONE ||
+            inst->flags.muf != V3D_QPU_UF_NONE) {
+                return true;
+        }
+
+        return false;
+}
diff --git a/src/broadcom/qpu/qpu_instr.h b/src/broadcom/qpu/qpu_instr.h
index 49d66ee888f..0da61fbb5d5 100644
--- a/src/broadcom/qpu/qpu_instr.h
+++ b/src/broadcom/qpu/qpu_instr.h
@@ -458,6 +458,8 @@ bool v3d_qpu_uses_mux(const struct v3d_qpu_instr *inst, enum v3d_qpu_mux mux);
 bool v3d_qpu_uses_vpm(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
 bool v3d_qpu_reads_vpm(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
 bool v3d_qpu_writes_vpm(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
+bool v3d_qpu_reads_flags(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
+bool v3d_qpu_writes_flags(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
 bool v3d_qpu_sig_writes_address(const struct v3d_device_info *devinfo,
                                 const struct v3d_qpu_sig *sig) ATTRIBUTE_CONST;