[Mesa-dev] [PATCH 2/2] radeonsi: lower ffma in nir to mad.

Dave Airlie airlied at gmail.com
Tue Oct 10 03:25:09 UTC 2017


From: Dave Airlie <airlied at redhat.com>

This lowers ffma to a * b + c.

This seems like it should keep Marek happiest, so
we'd never get to the fma instruction emission code.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/gallium/drivers/radeonsi/si_pipe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 4384987..b02247d 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -794,6 +794,7 @@ static const struct nir_shader_compiler_options nir_options = {
 	.lower_fsat = true,
 	.lower_fdiv = true,
 	.lower_sub = true,
+	.lower_ffma = true,
 	.lower_pack_snorm_2x16 = true,
 	.lower_pack_snorm_4x8 = true,
 	.lower_pack_unorm_2x16 = true,
-- 
2.9.5



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