From 24db1a5112fb651efb83520b856ffb6d0e612ddb Mon Sep 17 00:00:00 2001
From: Iago Toral Quiroga <itoral@igalia.com>
Date: Thu, 11 Feb 2021 13:22:28 +0100
Subject: [PATCH] broadcom/compiler: add a helper to check if an instruction
 writes unifa
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Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8980>
---
 src/broadcom/qpu/qpu_instr.c | 24 ++++++++++++++++++++++++
 src/broadcom/qpu/qpu_instr.h |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/src/broadcom/qpu/qpu_instr.c b/src/broadcom/qpu/qpu_instr.c
index 4cbf84ef00c..b771f270930 100644
--- a/src/broadcom/qpu/qpu_instr.c
+++ b/src/broadcom/qpu/qpu_instr.c
@@ -749,6 +749,30 @@ v3d_qpu_writes_vpm(const struct v3d_qpu_instr *inst)
         return false;
 }
 
+bool
+v3d_qpu_writes_unifa(const struct v3d_device_info *devinfo,
+                     const struct v3d_qpu_instr *inst)
+{
+        if (devinfo->ver < 40)
+                return false;
+
+        if (inst->type == V3D_QPU_INSTR_TYPE_ALU) {
+                if (inst->alu.add.op != V3D_QPU_A_NOP &&
+                    inst->alu.add.magic_write &&
+                    inst->alu.add.waddr == V3D_QPU_WADDR_UNIFA) {
+                        return true;
+                }
+
+                if (inst->alu.mul.op != V3D_QPU_M_NOP &&
+                    inst->alu.mul.magic_write &&
+                    inst->alu.mul.waddr == V3D_QPU_WADDR_UNIFA) {
+                        return true;
+                }
+        }
+
+        return false;
+}
+
 static bool
 v3d_qpu_waits_vpm(const struct v3d_qpu_instr *inst)
 {
diff --git a/src/broadcom/qpu/qpu_instr.h b/src/broadcom/qpu/qpu_instr.h
index 432312ca45d..4996e0134f7 100644
--- a/src/broadcom/qpu/qpu_instr.h
+++ b/src/broadcom/qpu/qpu_instr.h
@@ -470,6 +470,8 @@ bool v3d_qpu_writes_vpm(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
 bool v3d_qpu_reads_or_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_writes_unifa(const struct v3d_device_info *devinfo,
+                          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;
 bool v3d_qpu_unpacks_f32(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;