diff options
| -rw-r--r-- | src/broadcom/compiler/nir_to_vir.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/broadcom/compiler/nir_to_vir.c b/src/broadcom/compiler/nir_to_vir.c index 75e35067f27..893dfa160aa 100644 --- a/src/broadcom/compiler/nir_to_vir.c +++ b/src/broadcom/compiler/nir_to_vir.c @@ -1103,9 +1103,31 @@ emit_vpm_write_setup(struct v3d_compile *c) v3d33_vir_vpm_write_setup(c); } +/** + * Sets up c->outputs[c->output_position_index] for the vertex shader + * epilogue, if an output vertex position wasn't specified in the user's + * shader. This may be the case for transform feedback with rasterizer + * discard enabled. + */ +static void +setup_default_position(struct v3d_compile *c) +{ + if (c->output_position_index != -1) + return; + + c->output_position_index = c->outputs_array_size; + for (int i = 0; i < 4; i++) { + add_output(c, + c->output_position_index + i, + VARYING_SLOT_POS, i); + } +} + static void emit_vert_end(struct v3d_compile *c) { + setup_default_position(c); + uint32_t vpm_index = 0; struct qreg rcp_w = vir_SFU(c, V3D_QPU_WADDR_RECIP, c->outputs[c->output_position_index + 3]); |