gallium: Cleanup predicate and condition code TGSI tokens.

There is little point in having a special TGSI token just to handle
predicate register updates. Remove tgsi_dst_register_ext_predicate token
and instead use a new PREDICATE register file to update predicates.
Actually, the contents of the obsolete token are being moved
to tgsi_instruction_ext_predicate, where they should be
from the very beginning.

Remove the NVIDIA-specific condition code tokens -- nobody uses them
and they can be emulated with predicates if needed.

Introduce PIPE_CAP_SM3 that indicates whether a driver supports
SM3-level instructions, and in particular predicates.

Add PIPE_CAP_MAX_PREDICATE_REGISTERS that can be used to query the driver
how many predicate registers it supports (currently it would be 1).

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 52887ea0adc..6a61aea8fd7 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -333,6 +333,8 @@ enum pipe_transfer_usage {
 #define PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS 26
 #define PIPE_CAP_TGSI_CONT_SUPPORTED     27
 #define PIPE_CAP_BLEND_EQUATION_SEPARATE 28
+#define PIPE_CAP_SM3                     29  /*< Shader Model 3 supported */
+#define PIPE_CAP_MAX_PREDICATE_REGISTERS 30
 
 
 /**