tgsi_to_nir: Fix TGSI LIT translation by using flt.

TGSI spec says LIT needs a "greater than" comparison. NIR doesn't have that,
so let's use "less than" and swap the arguments. Previously "greater than or equal"
was used by tgsi_to_nir which is incorrect.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Tested-by: Andre Heider <a.heider@gmail.com>
Tested-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Eric Anholt <eric@anholt.net>

diff --git a/src/gallium/auxiliary/nir/tgsi_to_nir.c b/src/gallium/auxiliary/nir/tgsi_to_nir.c
index b35950289b99e3f256aad0913e66140915377305..545051e84fffeda439813eb0a5f351e80ad44c34 100644 (file)
--- a/src/gallium/auxiliary/nir/tgsi_to_nir.c
+++ b/src/gallium/auxiliary/nir/tgsi_to_nir.c
@@ -858,9 +858,9 @@ ttn_lit(nir_builder *b, nir_op op, nir_alu_dest dest, nir_ssa_def **src)
 
       ttn_move_dest_masked(b, dest,
                            nir_bcsel(b,
-                                     nir_fge(b,
-                                             nir_imm_float(b, 0.0),
-                                             ttn_channel(b, src[0], X)),
+                                     nir_flt(b,
+                                             ttn_channel(b, src[0], X),
+                                             nir_imm_float(b, 0.0)),
                                      nir_imm_float(b, 0.0),
                                      pow),
                            TGSI_WRITEMASK_Z);