[Mesa-dev] [PATCH 10/12] st/nine: Remove usage of SQRT in ff code

[Axel Davy]

SQRT is not supported everywhere, so replace
it by RSQ + RCP

Signed-off-by: Axel Davy <axel.davy at ens.fr>
---
 src/gallium/state_trackers/nine/nine_ff.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gallium/state_trackers/nine/nine_ff.c b/src/gallium/state_trackers/nine/nine_ff.c
index a5466a7..894fc63 100644
--- a/src/gallium/state_trackers/nine/nine_ff.c
+++ b/src/gallium/state_trackers/nine/nine_ff.c
@@ -563,7 +563,8 @@ nine_ff_build_vs(struct NineDevice9 *device, struct vs_build_ctx *vs)
         struct ureg_src cPsz2 = ureg_DECL_constant(ureg, 27);
 
         ureg_DP3(ureg, tmp_x, ureg_src(r[1]), ureg_src(r[1]));
-        ureg_SQRT(ureg, tmp_y, _X(tmp));
+        ureg_RSQ(ureg, tmp_y, _X(tmp));
+        ureg_RCP(ureg, tmp_y, _Y(tmp));
         ureg_MAD(ureg, tmp_x, _Y(tmp), _YYYY(cPsz2), _XXXX(cPsz2));
         ureg_MAD(ureg, tmp_x, _Y(tmp), _X(tmp), _WWWW(cPsz1));
         ureg_RCP(ureg, tmp_x, ureg_src(tmp));
-- 
2.7.0