diff options
Diffstat (limited to 'src/compiler/glsl/lower_instructions.cpp')
| -rw-r--r-- | src/compiler/glsl/lower_instructions.cpp | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/src/compiler/glsl/lower_instructions.cpp b/src/compiler/glsl/lower_instructions.cpp index 372ded180a5..3e25e2b91bf 100644 --- a/src/compiler/glsl/lower_instructions.cpp +++ b/src/compiler/glsl/lower_instructions.cpp @@ -392,7 +392,6 @@ lower_instructions_visitor::ldexp_to_arith(ir_expression *ir) ir_constant *sign_mask = new(ir) ir_constant(0x80000000u, vec_elem); ir_constant *exp_shift = new(ir) ir_constant(23, vec_elem); - ir_constant *exp_width = new(ir) ir_constant(8, vec_elem); /* Temporary variables */ ir_variable *x = new(ir) ir_variable(ir->type, "x", ir_var_temporary); @@ -455,10 +454,22 @@ lower_instructions_visitor::ldexp_to_arith(ir_expression *ir) */ ir_constant *exp_shift_clone = exp_shift->clone(ir, NULL); - ir->operation = ir_unop_bitcast_i2f; - ir->operands[0] = bitfield_insert(bitcast_f2i(x), resulting_biased_exp, - exp_shift_clone, exp_width); - ir->operands[1] = NULL; + + /* Don't generate new IR that would need to be lowered in an additional + * pass. + */ + if (!lowering(INSERT_TO_SHIFTS)) { + ir_constant *exp_width = new(ir) ir_constant(8u, vec_elem); + ir->operation = ir_unop_bitcast_i2f; + ir->operands[0] = bitfield_insert(bitcast_f2i(x), resulting_biased_exp, + exp_shift_clone, exp_width); + ir->operands[1] = NULL; + } else { + ir_constant *sign_mantissa_mask = new(ir) ir_constant(0x807fffffu, vec_elem); + ir->operation = ir_unop_bitcast_u2f; + ir->operands[0] = bit_or(bit_and(bitcast_f2u(x), sign_mantissa_mask), + lshift(i2u(resulting_biased_exp), exp_shift_clone)); + } this->progress = true; } |