+static unsigned tgsi_chan(const struct tgsi_full_src_register *tgsi_src, unsigned swizzle)
+{
+ switch (swizzle) {
+ case 0:
+ return tgsi_src->Register.SwizzleX;
+ case 1:
+ return tgsi_src->Register.SwizzleY;
+ case 2:
+ return tgsi_src->Register.SwizzleZ;
+ case 3:
+ return tgsi_src->Register.SwizzleW;
+ default:
+ return 0;
+ }
+}
+
+static int tgsi_split_constant(struct r600_shader_ctx *ctx, struct r600_bc_alu_src r600_src[3])
+{
+ struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
+ struct r600_bc_alu alu;
+ int i, j, k, nconst, r;
+
+ for (i = 0, nconst = 0; i < inst->Instruction.NumSrcRegs; i++) {
+ if (inst->Src[i].Register.File == TGSI_FILE_CONSTANT) {
+ nconst++;
+ }
+ r = tgsi_src(ctx, &inst->Src[i], &r600_src[i]);
+ if (r) {
+ return r;
+ }
+ }
+ for (i = 0, j = nconst - 1; i < inst->Instruction.NumSrcRegs; i++) {
+ if (inst->Src[j].Register.File == TGSI_FILE_CONSTANT && j > 0) {
+ for (k = 0; k < 4; k++) {
+ memset(&alu, 0, sizeof(struct r600_bc_alu));
+ alu.inst = V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV;
+ alu.src[0].sel = r600_src[0].sel;
+ alu.src[0].chan = k;
+ alu.dst.sel = ctx->temp_reg + j;
+ alu.dst.chan = k;
+ alu.dst.write = 1;
+ if (k == 3)
+ alu.last = 1;
+ r = r600_bc_add_alu(ctx->bc, &alu);
+ if (r)
+ return r;
+ }
+ r600_src[0].sel = ctx->temp_reg + j;
+ j--;
+ }
+ }
+ return 0;
+}
+