[Mesa-dev] [PATCH 23/53] st/nine: Fix POW implementation

[Axel Davy]

POW doesn't match directly TGSI, since we should
take the absolute value of src0.

Fixes black textures in some games

Reviewed-by: David Heidelberg <david at ixit.cz>
Signed-off-by: Axel Davy <axel.davy at ens.fr>

Cc: "10.4" <mesa-stable at lists.freedesktop.org>
---
 src/gallium/state_trackers/nine/nine_shader.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/gallium/state_trackers/nine/nine_shader.c b/src/gallium/state_trackers/nine/nine_shader.c
index 6f8ddcc..da77da5 100644
--- a/src/gallium/state_trackers/nine/nine_shader.c
+++ b/src/gallium/state_trackers/nine/nine_shader.c
@@ -1946,6 +1946,17 @@ DECL_SPECIAL(DEFI)
     return D3D_OK;
 }
 
+DECL_SPECIAL(POW)
+{
+    struct ureg_dst dst = tx_dst_param(tx, &tx->insn.dst[0]);
+    struct ureg_src src[2] = {
+        tx_src_param(tx, &tx->insn.src[0]),
+        tx_src_param(tx, &tx->insn.src[1])
+    };
+    ureg_POW(tx->ureg, dst, ureg_abs(src[0]), src[1]);
+    return D3D_OK;
+}
+
 DECL_SPECIAL(NRM)
 {
     struct ureg_program *ureg = tx->ureg;
@@ -2288,7 +2299,7 @@ struct sm1_op_info inst_table[] =
 
     _OPI(DCL, NOP, V(0,0), V(3,0), V(0,0), V(3,0), 0, 0, SPECIAL(DCL)),
 
-    _OPI(POW, POW, V(0,0), V(3,0), V(0,0), V(3,0), 1, 2, NULL),
+    _OPI(POW, POW, V(0,0), V(3,0), V(0,0), V(3,0), 1, 2, SPECIAL(POW)),
     _OPI(CRS, XPD, V(0,0), V(3,0), V(0,0), V(3,0), 1, 2, NULL), /* XXX: .w */
     _OPI(SGN, SSG, V(2,0), V(3,0), V(0,0), V(0,0), 1, 3, SPECIAL(SGN)), /* ignore src1,2 */
     _OPI(ABS, ABS, V(0,0), V(3,0), V(0,0), V(3,0), 1, 1, NULL),
-- 
2.1.3