v3d: add helpers to emit ldtlb and ldtlbu signals

The ldtlbu version will read an implicit uniform with the TLB read
specifier and should be used for the first read in a sequence
of TLB reads (unless the default configuration is valid, in which
case we can use ldtlb). The ldtlb version is used for any subsequent
TLB read in the sequence.

Reviewed-by: Eric Anholt <eric@anholt.net>

diff --git a/src/broadcom/compiler/v3d_compiler.h b/src/broadcom/compiler/v3d_compiler.h
index cb466c0c59f15123a4a6f00abbc6de4b7cdce4a1..5c4e3046f50080287502774d918b9738d4a5c2c7 100644 (file)
--- a/src/broadcom/compiler/v3d_compiler.h
+++ b/src/broadcom/compiler/v3d_compiler.h
@@ -1076,6 +1076,30 @@ vir_UMUL(struct v3d_compile *c, struct qreg src0, struct qreg src1)
         return vir_UMUL24(c, src0, src1);
 }
 
+static inline struct qreg
+vir_TLBU_COLOR_READ(struct v3d_compile *c, uint32_t config)
+{
+        assert(c->devinfo->ver >= 41); /* XXX */
+        assert((config & 0xffffff00) == 0xffffff00);
+
+        struct qinst *ldtlb = vir_add_inst(V3D_QPU_A_NOP, c->undef,
+                                           c->undef, c->undef);
+        ldtlb->qpu.sig.ldtlbu = true;
+        ldtlb->uniform = vir_get_uniform_index(c, QUNIFORM_CONSTANT, config);
+        return vir_emit_def(c, ldtlb);
+}
+
+static inline struct qreg
+vir_TLB_COLOR_READ(struct v3d_compile *c)
+{
+        assert(c->devinfo->ver >= 41); /* XXX */
+
+        struct qinst *ldtlb = vir_add_inst(V3D_QPU_A_NOP, c->undef,
+                                           c->undef, c->undef);
+        ldtlb->qpu.sig.ldtlb = true;
+        return vir_emit_def(c, ldtlb);
+}
+
 /*
 static inline struct qreg
 vir_LOAD_IMM(struct v3d_compile *c, uint32_t val)