r600g: DP4 also supports writemasking

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index aaebd16a3102a441f210abab1dd2123c959ea4c8..3deabbca3a9a4075f042618e3091020891ff6b7f 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -1649,15 +1649,13 @@ static int tgsi_dp(struct r600_shader_ctx *ctx)
                        alu.src[j] = r600_src[j];
                        alu.src[j].chan = tgsi_chan(&inst->Src[j], i);
                }
-               if(inst->Dst[0].Register.WriteMask & (1 << i)) {
-                       r = tgsi_dst(ctx, &inst->Dst[0], i, &alu.dst);
-                       if (r)
-                               return r;
-               } else {
-                       alu.dst.sel = ctx->temp_reg;
-               }
+
+               r = tgsi_dst(ctx, &inst->Dst[0], i, &alu.dst);
+               if (r)
+                       return r;
+
                alu.dst.chan = i;
-               alu.dst.write = 1;
+               alu.dst.write = (inst->Dst[0].Register.WriteMask >> i) & 1;
                /* handle some special cases */
                switch (ctx->inst_info->tgsi_opcode) {
                case TGSI_OPCODE_DP2: