diff options
Diffstat (limited to 'src/gallium/drivers/vc4/vc4_program.c')
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_program.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index 3056c6736af..c6034257e42 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -1619,6 +1619,29 @@ emit_point_size_write(struct vc4_compile *c) qir_VPM_WRITE(c, point_size); } +/** + * Emits a VPM read of the stub vertex attribute set up by vc4_draw.c. + * + * The simulator insists that there be at least one vertex attribute, so + * vc4_draw.c will emit one if it wouldn't have otherwise. The simulator also + * insists that all vertex attributes loaded get read by the VS/CS, so we have + * to consume it here. + */ +static void +emit_stub_vpm_read(struct vc4_compile *c) +{ + if (c->num_inputs) + return; + + for (int i = 0; i < 4; i++) { + qir_emit(c, qir_inst(QOP_VPM_READ, + qir_get_temp(c), + c->undef, + c->undef)); + c->num_inputs++; + } +} + static void emit_vert_end(struct vc4_compile *c, struct vc4_varying_semantic *fs_inputs, @@ -1626,6 +1649,7 @@ emit_vert_end(struct vc4_compile *c, { struct qreg rcp_w = qir_RCP(c, c->outputs[3]); + emit_stub_vpm_read(c); emit_scaled_viewport_write(c, rcp_w); emit_zs_write(c, rcp_w); emit_rcp_wc_write(c, rcp_w); @@ -1658,6 +1682,8 @@ emit_coord_end(struct vc4_compile *c) { struct qreg rcp_w = qir_RCP(c, c->outputs[3]); + emit_stub_vpm_read(c); + for (int i = 0; i < 4; i++) qir_VPM_WRITE(c, c->outputs[i]); |