i965/vec4: add support for packing vs/gs/tes outputs

Here we create a new output_generic_reg array with the ability to
store the dst_reg for each component of user defined varyings.
This is needed as the previous code only stored the dst_reg based
on the varying location which meant packed varyings would overwrite
each other.

Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Alejandro Piñeiro <[email protected]>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_vec4.h b/src/mesa/drivers/dri/i965/brw_vec4.h
index d544e711da9..1505ba6ecb1 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.h
+++ b/src/mesa/drivers/dri/i965/brw_vec4.h
@@ -114,6 +114,8 @@ public:
     * for the ir->location's used.
     */
    dst_reg output_reg[BRW_VARYING_SLOT_COUNT];
+   dst_reg output_generic_reg[MAX_VARYINGS_INCL_PATCH][4];
+   unsigned output_generic_num_components[MAX_VARYINGS_INCL_PATCH][4];
    const char *output_reg_annotation[BRW_VARYING_SLOT_COUNT];
    int uniforms;
 
@@ -269,6 +271,7 @@ public:
    void emit_ndc_computation();
    void emit_psiz_and_flags(dst_reg reg);
    vec4_instruction *emit_generic_urb_slot(dst_reg reg, int varying);
+   void emit_generic_urb_slot(dst_reg reg, int varying, int component);
    virtual void emit_urb_slot(dst_reg reg, int varying);
 
    void emit_shader_time_begin();