nir: fix lower_wpos for 16-bit fddy
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5002>
diff --git a/src/compiler/nir/nir_lower_wpos_ytransform.c b/src/compiler/nir/nir_lower_wpos_ytransform.c
index d0a694f..2771f2a 100644
--- a/src/compiler/nir/nir_lower_wpos_ytransform.c
+++ b/src/compiler/nir/nir_lower_wpos_ytransform.c
@@ -267,8 +267,11 @@
b->cursor = nir_before_instr(&fddy->instr);
p = nir_ssa_for_alu_src(b, fddy, 0);
- trans = get_transform(state);
- pt = nir_fmul(b, p, nir_channel(b, trans, 0));
+ trans = nir_channel(b, get_transform(state), 0);
+ if (p->bit_size == 16)
+ trans = nir_f2f16(b, trans);
+
+ pt = nir_fmul(b, p, trans);
nir_instr_rewrite_src(&fddy->instr,
&fddy->src[0].src,
