+ * base_ptr + stride * index, where index depends on instance divisor
+ */
+ if (varient->instance_divisor) {
+ /* Our index is instance ID divided by instance divisor.
+ */
+ x86_mov(p->func, tmp_EAX, instance_id);
+
+ if (varient->instance_divisor != 1) {
+ struct x86_reg tmp_EDX = p->machine_EDX;
+ struct x86_reg tmp_ECX = p->outbuf_ECX;
+
+ /* TODO: Add x86_shr() to rtasm and use it whenever
+ * instance divisor is power of two.
+ */
+
+ x86_push(p->func, tmp_EDX);
+ x86_push(p->func, tmp_ECX);
+ x86_xor(p->func, tmp_EDX, tmp_EDX);
+ x86_mov_reg_imm(p->func, tmp_ECX, varient->instance_divisor);
+ x86_div(p->func, tmp_ECX); /* EAX = EDX:EAX / ECX */
+ x86_pop(p->func, tmp_ECX);
+ x86_pop(p->func, tmp_EDX);
+ }
+ } else {
+ x86_mov(p->func, tmp_EAX, elt);
+ }
+
+ /*
+ * TODO: Respect translate_buffer::max_index.