Mesa (master): intel/compiler: Lower ffma on Gen4 and Gen5

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Module: Mesa
Branch: master
Commit: 26391cceaa17d9452f9adcf321aa05731eb50a39
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=26391cceaa17d9452f9adcf321aa05731eb50a39

Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Thu Apr 18 17:48:15 2019 -0700

intel/compiler: Lower ffma on Gen4 and Gen5

flrp32 is also a 3-source instruction, but there is another pending
series that handles that for Gen4 and Gen5.

v2: Rebase on "intel/compiler: Don't have sepearate, per-Gen
nir_options"

Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>
Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/intel/compiler/brw_compiler.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/intel/compiler/brw_compiler.c b/src/intel/compiler/brw_compiler.c
index f1acf838887..44296083711 100644
--- a/src/intel/compiler/brw_compiler.c
+++ b/src/intel/compiler/brw_compiler.c
@@ -183,6 +183,10 @@ brw_compiler_create(void *mem_ctx, const struct gen_device_info *devinfo)
             nir_options->lower_flrp32 = true;
          }
       }
+
+      /* Prior to Gen6, there are no three source operations. */
+      nir_options->lower_ffma = devinfo->gen < 6;
+
       nir_options->lower_int64_options = int64_options;
       nir_options->lower_doubles_options = fp64_options;
       compiler->glsl_compiler_options[i].NirOptions = nir_options;