r600g: Implemented the Z and W component write for the SCS opcode.

Signed-off-by: Tilman Sauerbeck <tilman@code-monkey.de>

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 523b6d24515610e217b846a44d69eeddbac35c45..1702475fa35a69a247abe8a3809a76db3bf3c0b3 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -967,6 +967,55 @@ static int tgsi_scs(struct r600_shader_ctx *ctx)
                        return r;
        }
 
+       /* dst.z = 0.0; */
+       if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_Z) {
+               fprintf(stderr, "writing z\n");
+               memset(&alu, 0, sizeof(struct r600_bc_alu));
+
+               alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV);
+
+               r = tgsi_dst(ctx, &inst->Dst[0], 2, &alu.dst);
+               if (r)
+                       return r;
+
+               alu.src[0].sel = V_SQ_ALU_SRC_0;
+               alu.src[0].chan = 0;
+
+               alu.last = 1;
+
+               r = r600_bc_add_alu(ctx->bc, &alu);
+               if (r)
+                       return r;
+
+               r = r600_bc_add_literal(ctx->bc, ctx->value);
+               if (r)
+                       return r;
+       }
+
+       /* dst.w = 1.0; */
+       if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_W) {
+               memset(&alu, 0, sizeof(struct r600_bc_alu));
+
+               alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV);
+
+               r = tgsi_dst(ctx, &inst->Dst[0], 3, &alu.dst);
+               if (r)
+                       return r;
+
+               alu.src[0].sel = V_SQ_ALU_SRC_1;
+               alu.src[0].chan = 0;
+
+               alu.last = 1;
+
+               r = r600_bc_add_alu(ctx->bc, &alu);
+               if (r)
+                       return r;
+
+               r = r600_bc_add_literal(ctx->bc, ctx->value);
+               if (r)
+                       return r;
+       }
+
        return 0;
 }