prog_to_nir, tgsi_to_nir: make sure kill doesn't discard NaNs

Reviewed-by: Connor Abbott <[email protected]>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/mesa/program/prog_to_nir.c b/src/mesa/program/prog_to_nir.c
index a5ac37af908..84ba708d0be 100644
--- a/src/mesa/program/prog_to_nir.c
+++ b/src/mesa/program/prog_to_nir.c
@@ -456,7 +456,10 @@ ptn_lrp(nir_builder *b, nir_alu_dest dest, nir_ssa_def **src)
 static void
 ptn_kil(nir_builder *b, nir_ssa_def **src)
 {
+   /* flt must be exact, because NaN shouldn't discard. (apps rely on this) */
+   b->exact = true;
    nir_ssa_def *cmp = nir_bany(b, nir_flt(b, src[0], nir_imm_float(b, 0.0)));
+   b->exact = false;
 
    nir_intrinsic_instr *discard =
       nir_intrinsic_instr_create(b->shader, nir_intrinsic_discard_if);