-static void
-etna_lower_alu_impl(nir_function_impl *impl, bool has_new_transcendentals)
-{
- nir_shader *shader = impl->function->shader;
-
- nir_builder b;
- nir_builder_init(&b, impl);
-
- /* in a seperate loop so we can apply the multiple-uniform logic to the new fmul */
- nir_foreach_block(block, impl) {
- nir_foreach_instr_safe(instr, block) {
- if (instr->type != nir_instr_type_alu)
- continue;
-
- nir_alu_instr *alu = nir_instr_as_alu(instr);
- /* multiply sin/cos src by constant
- * TODO: do this earlier (but it breaks const_prop opt)
- */
- if (alu->op == nir_op_fsin || alu->op == nir_op_fcos) {
- b.cursor = nir_before_instr(instr);
-
- nir_ssa_def *imm = has_new_transcendentals ?
- nir_imm_float(&b, 1.0 / M_PI) :
- nir_imm_float(&b, 2.0 / M_PI);
-
- nir_instr_rewrite_src(instr, &alu->src[0].src,
- nir_src_for_ssa(nir_fmul(&b, alu->src[0].src.ssa, imm)));
- }
-
- /* change transcendental ops to vec2 and insert vec1 mul for the result
- * TODO: do this earlier (but it breaks with optimizations)
- */
- if (has_new_transcendentals && (
- alu->op == nir_op_fdiv || alu->op == nir_op_flog2 ||
- alu->op == nir_op_fsin || alu->op == nir_op_fcos)) {
- nir_ssa_def *ssa = &alu->dest.dest.ssa;
-
- assert(ssa->num_components == 1);
-
- nir_alu_instr *mul = nir_alu_instr_create(shader, nir_op_fmul);
- mul->src[0].src = mul->src[1].src = nir_src_for_ssa(ssa);
- mul->src[1].swizzle[0] = 1;
-
- mul->dest.write_mask = 1;
- nir_ssa_dest_init(&mul->instr, &mul->dest.dest, 1, 32, NULL);
-
- ssa->num_components = 2;
-
- mul->dest.saturate = alu->dest.saturate;
- alu->dest.saturate = 0;
-
- nir_instr_insert_after(instr, &mul->instr);
-
- nir_ssa_def_rewrite_uses_after(ssa, nir_src_for_ssa(&mul->dest.dest.ssa), &mul->instr);
- }
- }
- }
-}
-
-static void etna_lower_alu(nir_shader *shader, bool has_new_transcendentals)
-{
- nir_foreach_function(function, shader) {
- if (function->impl)
- etna_lower_alu_impl(function->impl, has_new_transcendentals);
- }
-}
-