I don't think either of these work for negative numbers
On September 1, 2018 14:16:11 Christian Gmeiner
<christian.gmei...@gmail.com> wrote:
Signed-off-by: Christian Gmeiner <christian.gmei...@gmail.com>
---
src/compiler/nir/nir.h | 3 +++
src/compiler/nir/nir_opt_algebraic.py | 1 +
2 files changed, 4 insertions(+)
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 169fa1fa20..d81eefc032 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -2054,6 +2054,9 @@ typedef struct nir_shader_compiler_options {
*/
bool fdot_replicates;
+ /** lowers ffloor to fsub+ffract: */
+ bool lower_ffloor;
+
/** lowers ffract to fsub+ffloor: */
bool lower_ffract;
diff --git a/src/compiler/nir/nir_opt_algebraic.py
b/src/compiler/nir/nir_opt_algebraic.py
index ae1261f874..3d2b861a42 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -118,6 +118,7 @@ optimizations = [
(('~flrp', a, 0.0, c), ('fadd', ('fmul', ('fneg', a), c), a)),
(('flrp@32', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a),
'options->lower_flrp32'),
(('flrp@64', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a),
'options->lower_flrp64'),
+ (('ffloor', a), ('fsub', a, ('ffract', a)), 'options->lower_ffloor'),
(('ffract', a), ('fsub', a, ('ffloor', a)), 'options->lower_ffract'),
(('~fadd', ('fmul', a, ('fadd', 1.0, ('fneg', ('b2f', c)))), ('fmul', b,
('b2f', c))), ('bcsel', c, b, a), 'options->lower_flrp32'),
(('~fadd@32', ('fmul', a, ('fadd', 1.0, ('fneg', c ))), ('fmul', b,
c )), ('flrp', a, b, c), '!options->lower_flrp32'),
--
2.17.1
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