diff options
Diffstat (limited to 'mesalib/src/glsl/lower_instructions.cpp')
| -rw-r--r-- | mesalib/src/glsl/lower_instructions.cpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/mesalib/src/glsl/lower_instructions.cpp b/mesalib/src/glsl/lower_instructions.cpp index 8f8d448ea..44a6e8021 100644 --- a/mesalib/src/glsl/lower_instructions.cpp +++ b/mesalib/src/glsl/lower_instructions.cpp @@ -384,10 +384,10 @@ lower_instructions_visitor::ldexp_to_arith(ir_expression *ir) /* Constants */ ir_constant *zeroi = ir_constant::zero(ir, ivec); - ir_constant *sign_mantissa_mask = new(ir) ir_constant(0x807fffffu, vec_elem); ir_constant *sign_mask = new(ir) ir_constant(0x80000000u, vec_elem); ir_constant *exp_shift = new(ir) ir_constant(23u, vec_elem); + ir_constant *exp_width = new(ir) ir_constant(8u, vec_elem); /* Temporary variables */ ir_variable *x = new(ir) ir_variable(ir->type, "x", ir_var_temporary); @@ -449,11 +449,17 @@ lower_instructions_visitor::ldexp_to_arith(ir_expression *ir) */ ir_constant *exp_shift_clone = exp_shift->clone(ir, NULL); - 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)); + 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(BITFIELD_INSERT_TO_BFM_BFI)) + bitfield_insert_to_bfm_bfi(ir->operands[0]->as_expression()); + this->progress = true; } |