When the input's xyz are 0.0, the output
should be 0.0. This is due to the fact that
Inf * 0 = 0 for dx9. To handle this case,
cap the result of RSQ to FLT_MAX. We have
FLT_MAX * 0 = 0.
Reviewed-by: David Heidelberg <da...@ixit.cz>
Signed-off-by: Axel Davy <axel.d...@ens.fr>
Cc: "10.4" <mesa-sta...@lists.freedesktop.org>
---
src/gallium/state_trackers/nine/nine_shader.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/gallium/state_trackers/nine/nine_shader.c
b/src/gallium/state_trackers/nine/nine_shader.c
index 4dee5f5..48492b4 100644
--- a/src/gallium/state_trackers/nine/nine_shader.c
+++ b/src/gallium/state_trackers/nine/nine_shader.c
@@ -1973,10 +1973,12 @@ DECL_SPECIAL(NRM)
struct ureg_program *ureg = tx->ureg;
struct ureg_dst tmp = tx_scratch_scalar(tx);
struct ureg_src nrm = tx_src_scalar(tmp);
+ struct ureg_dst dst = tx_dst_param(tx, &tx->insn.dst[0]);
struct ureg_src src = tx_src_param(tx, &tx->insn.src[0]);
ureg_DP3(ureg, tmp, src, src);
ureg_RSQ(ureg, tmp, nrm);
- ureg_MUL(ureg, tx_dst_param(tx, &tx->insn.dst[0]), src, nrm);
+ ureg_MIN(ureg, tmp, ureg_imm1f(ureg, FLT_MAX), nrm);
+ ureg_MUL(ureg, dst, src, nrm);
return D3D_OK;
}
--
2.1.3
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