<div dir="ltr">Reviewed-by: Jason Ekstrand <<a href="mailto:jason@jlekstrand.net">jason@jlekstrand.net</a>><br></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Nov 12, 2018 at 12:17 PM Jonathan Marek <<a href="mailto:jonathan@marek.ca">jonathan@marek.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">lowers ceil(x) as -floor(-x)<br>
<br>
Signed-off-by: Jonathan Marek <<a href="mailto:jonathan@marek.ca" target="_blank">jonathan@marek.ca</a>><br>
---<br>
src/compiler/nir/nir.h | 3 +++<br>
src/compiler/nir/nir_opt_algebraic.py | 1 +<br>
2 files changed, 4 insertions(+)<br>
<br>
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h<br>
index dc3c729dee..f9b32a5daf 100644<br>
--- a/src/compiler/nir/nir.h<br>
+++ b/src/compiler/nir/nir.h<br>
@@ -2086,6 +2086,9 @@ typedef struct nir_shader_compiler_options {<br>
/** lowers ffract to fsub+ffloor: */<br>
bool lower_ffract;<br>
<br>
+ /** lowers fceil to fneg+ffloor+fneg: */<br>
+ bool lower_fceil;<br>
+<br>
bool lower_ldexp;<br>
<br>
bool lower_pack_half_2x16;<br>
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py<br>
index 8b24daddfd..8f4df891b8 100644<br>
--- a/src/compiler/nir/nir_opt_algebraic.py<br>
+++ b/src/compiler/nir/nir_opt_algebraic.py<br>
@@ -124,6 +124,7 @@ optimizations = [<br>
(('flrp@32', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a), 'options->lower_flrp32'),<br>
(('flrp@64', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a), 'options->lower_flrp64'),<br>
(('ffract', a), ('fsub', a, ('ffloor', a)), 'options->lower_ffract'),<br>
+ (('fceil', a), ('fneg', ('ffloor', ('fneg', a))), 'options->lower_fceil'),<br>
(('~fadd', ('fmul', a, ('fadd', 1.0, ('fneg', ('b2f', c)))), ('fmul', b, ('b2f', c))), ('bcsel', c, b, a), 'options->lower_flrp32'),<br>
(('~fadd@32', ('fmul', a, ('fadd', 1.0, ('fneg', c ))), ('fmul', b, c )), ('flrp', a, b, c), '!options->lower_flrp32'),<br>
(('~fadd@64', ('fmul', a, ('fadd', 1.0, ('fneg', c ))), ('fmul', b, c )), ('flrp', a, b, c), '!options->lower_flrp64'),<br>
-- <br>
2.17.1<br>
<br>
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</blockquote></div>