diff options
| author | Elie Tournier <tournier.elie@gmail.com> | 2017-08-18 17:03:39 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2018-01-18 14:16:27 +1000 |
| commit | a82c344bb1b35ee981358d321b11429d85851e40 (patch) | |
| tree | 15d53436a54ea7ca89a03020989cc33864e2872e | |
| parent | 34657902a55ee4cb6137404dc6f1fb56a14e115d (diff) | |
glsl: Add a lowering pass for 64-bit float ceil()
Signed-off-by: Elie Tournier <elie.tournier@collabora.com>
| -rw-r--r-- | src/compiler/glsl/lower_instructions.cpp | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/src/compiler/glsl/lower_instructions.cpp b/src/compiler/glsl/lower_instructions.cpp index 9ff80a502f0..266bfc9911e 100644 --- a/src/compiler/glsl/lower_instructions.cpp +++ b/src/compiler/glsl/lower_instructions.cpp @@ -180,6 +180,7 @@ private: void min_to_less(ir_expression *ir); void max_to_less(ir_expression *ir); void dfloor_to_dtrunc(ir_expression *ir); + void dceil_to_dtrunc(ir_expression *ir); ir_expression *_carry(operand a, operand b); }; @@ -1728,6 +1729,27 @@ lower_instructions_visitor::dfloor_to_dtrunc(ir_expression *ir) this->progress = true; } +void +lower_instructions_visitor::dceil_to_dtrunc(ir_expression *ir) +{ + /* if x < 0, ceil(x) = trunc(x) + * else if (x - trunc(x) == 0), ceil(x) = x + * else, ceil(x) = trunc(x) + 1 + */ + + ir_rvalue *src = ir->operands[0]->clone(ir, NULL); + ir_rvalue *tr = trunc(src); + + ir->operation = ir_triop_csel; + ir->init_num_operands(); + ir->operands[0] = logic_or(less(src, new(ir) ir_constant(0.0, 1)), + equal(src, tr)); + ir->operands[1] = tr; + ir->operands[2] = add(tr, new(ir) ir_constant(1.0, 1)); + + this->progress = true; +} + ir_visitor_status lower_instructions_visitor::visit_leave(ir_expression *ir) { @@ -1811,8 +1833,13 @@ lower_instructions_visitor::visit_leave(ir_expression *ir) break; case ir_unop_ceil: - if (lowering(DOPS_TO_DFRAC) && ir->type->is_double()) - dceil_to_dfrac(ir); + if (ir->type->is_double()) { + if (lowering(DOPS_TO_DFRAC)) { + dceil_to_dfrac(ir); + } else if (lowering(DOPS_TO_DTRUNC) && ir->type->is_scalar()) { + dceil_to_dtrunc(ir); + } + } break; case ir_unop_floor: |