r600g: add doubles support for CAYMAN

Only a subset of AMD GPUs supported by r600g support doubles,
CAYMAN and CYPRESS are probably all we'll try and support, however
I don't have a CYPRESS so ignore that for now.

This disables SB support for doubles, as we think we need to
make the scheduler smarter to introduce delay slots.

[airlied: pushing this to avoid pain of rebasing, it mostly
works on cayman only so far, Glenn has some ideas about
delay slot issues we need to look into. turned off by
default for now]

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/gallium/drivers/r600/r600_asm.c b/src/gallium/drivers/r600/r600_asm.c
index 9b356ba..bc69806 100644
--- a/src/gallium/drivers/r600/r600_asm.c
+++ b/src/gallium/drivers/r600/r600_asm.c
@@ -252,6 +252,12 @@ static int alu_uses_rel(struct r600_bytecode *bc, struct r600_bytecode_alu *alu)
 	return 0;
 }
 
+static int is_alu_64bit_inst(struct r600_bytecode *bc, struct r600_bytecode_alu *alu)
+{
+	const struct alu_op_info *op = r600_isa_alu(alu->op);
+	return (op->flags & AF_64);
+}
+
 static int is_alu_vec_unit_inst(struct r600_bytecode *bc, struct r600_bytecode_alu *alu)
 {
 	unsigned slots = r600_isa_alu_slots(bc->isa->hw_class, alu->op);
@@ -576,6 +582,12 @@ static int replace_gpr_with_pv_ps(struct r600_bytecode *bc,
 
 	for (i = 0; i < max_slots; ++i) {
 		if (prev[i] && (prev[i]->dst.write || prev[i]->is_op3) && !prev[i]->dst.rel) {
+
+			if (is_alu_64bit_inst(bc, prev[i])) {
+				gpr[i] = -1;
+				continue;
+			}
+
 			gpr[i] = prev[i]->dst.sel;
 			/* cube writes more than PV.X */
 			if (is_alu_reduction_inst(bc, prev[i]))
@@ -591,6 +603,8 @@ static int replace_gpr_with_pv_ps(struct r600_bytecode *bc,
 		if(!alu)
 			continue;
 
+		if (is_alu_64bit_inst(bc, alu))
+			continue;
 		num_src = r600_bytecode_get_num_operands(bc, alu);
 		for (src = 0; src < num_src; ++src) {
 			if (!is_gpr(alu->src[src].sel) || alu->src[src].rel)