r600g: fix replace_gpr_with_pv_ps

Instructions with 3 source operands have no write mask, so we may replace their
destinations with PV/PS in the next group even if their dst.write is 0.

Note: This is a candidate for the 7.11 branch.

Signed-off-by: Vadim Girlin <vadimgirlin@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/src/gallium/drivers/r600/r600_asm.c b/src/gallium/drivers/r600/r600_asm.c
index 604cb60..27febdf 100644 (file)
--- a/src/gallium/drivers/r600/r600_asm.c
+++ b/src/gallium/drivers/r600/r600_asm.c
@@ -787,7 +787,7 @@ static int replace_gpr_with_pv_ps(struct r600_bytecode *bc,
                return r;
 
        for (i = 0; i < max_slots; ++i) {
-               if(prev[i] && prev[i]->dst.write && !prev[i]->dst.rel) {
+               if (prev[i] && (prev[i]->dst.write || prev[i]->is_op3) && !prev[i]->dst.rel) {
                        gpr[i] = prev[i]->dst.sel;
                        /* cube writes more than PV.X */
                        if (!is_alu_cube_inst(bc, prev[i]) && is_alu_reduction_inst(bc, prev[i]))