Mesa (master): broadcom/vc5: Add a QPU helper for instructions using the TLB.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: c3a504f470b8116ebcd892ce1f48125549817467
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c3a504f470b8116ebcd892ce1f48125549817467

Author: Eric Anholt <eric at anholt.net>
Date:   Mon Mar 19 11:30:27 2018 -0700

broadcom/vc5: Add a QPU helper for instructions using the TLB.

This will be used for detecting last thread segment in register spilling.

---

 src/broadcom/qpu/qpu_instr.c | 22 ++++++++++++++++++++++
 src/broadcom/qpu/qpu_instr.h |  1 +
 2 files changed, 23 insertions(+)

diff --git a/src/broadcom/qpu/qpu_instr.c b/src/broadcom/qpu/qpu_instr.c
index 978d470cc6..213a0826a5 100644
--- a/src/broadcom/qpu/qpu_instr.c
+++ b/src/broadcom/qpu/qpu_instr.c
@@ -569,6 +569,28 @@ v3d_qpu_add_op_writes_vpm(enum  v3d_qpu_add_op op)
 }
 
 bool
+v3d_qpu_uses_tlb(const struct v3d_qpu_instr *inst)
+{
+        if (inst->sig.ldtlb ||
+            inst->sig.ldtlbu)
+                return true;
+
+        if (inst->type == V3D_QPU_INSTR_TYPE_ALU) {
+                if (inst->alu.add.magic_write &&
+                    v3d_qpu_magic_waddr_is_tlb(inst->alu.add.waddr)) {
+                        return true;
+                }
+
+                if (inst->alu.mul.magic_write &&
+                    v3d_qpu_magic_waddr_is_tlb(inst->alu.mul.waddr)) {
+                        return true;
+                }
+        }
+
+        return false;
+}
+
+bool
 v3d_qpu_writes_tmu(const struct v3d_qpu_instr *inst)
 {
         return (inst->type == V3D_QPU_INSTR_TYPE_ALU &&
diff --git a/src/broadcom/qpu/qpu_instr.h b/src/broadcom/qpu/qpu_instr.h
index 9568857f11..e5e9a9a3f1 100644
--- a/src/broadcom/qpu/qpu_instr.h
+++ b/src/broadcom/qpu/qpu_instr.h
@@ -437,6 +437,7 @@ bool v3d_qpu_magic_waddr_is_tmu(enum v3d_qpu_waddr waddr) ATTRIBUTE_CONST;
 bool v3d_qpu_magic_waddr_is_tlb(enum v3d_qpu_waddr waddr) ATTRIBUTE_CONST;
 bool v3d_qpu_magic_waddr_is_vpm(enum v3d_qpu_waddr waddr) ATTRIBUTE_CONST;
 bool v3d_qpu_magic_waddr_is_tsy(enum v3d_qpu_waddr waddr) ATTRIBUTE_CONST;
+bool v3d_qpu_uses_tlb(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
 bool v3d_qpu_writes_tmu(const struct v3d_qpu_instr *inst) ATTRIBUTE_CONST;
 bool v3d_qpu_writes_r3(const struct v3d_device_info *devinfo,
                        const struct v3d_qpu_instr *instr) ATTRIBUTE_CONST;