isaspec: Make possible to obtain gpu_id in <expr> blocks

Done with ISA_GPU_ID() macro. This makes possible to use
gpu generation in to select between overrides.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23217>

src/compiler/isaspec/encode.py

@@ -391,6 +391,11 @@ store_instruction(BITSET_WORD *dst, bitmask_t instr)
  */
 struct encode_state;
 
+/**
+ * Allows to use gpu_id in expr functions
+ */
+#define ISA_GPU_ID() s->gen
+
 struct bitset_params;
 
 static bitmask_t

src/compiler/isaspec/isaspec_decode_decl.h

@@ -61,6 +61,12 @@ void isa_decode_bitset(void *out, const struct isa_bitset **bitsets, struct deco
 /**
  * Used by generated decode functions
  */
+uint32_t isa_get_gpu_id(struct decode_scope *scope);
+
+/**
+ * Allows to use gpu_id in expr functions
+ */
+#define ISA_GPU_ID() isa_get_gpu_id(scope)
 
 /**
  * For bitset fields, there are some cases where we want to "remap" field

src/compiler/isaspec/isaspec_decode_impl.c

@@ -557,6 +557,12 @@ isa_decode_field(struct decode_scope *scope, const char *field_name)
 	return bitmask_to_uint64_t(val);
 }
 
+uint32_t
+isa_get_gpu_id(struct decode_scope *scope)
+{
+	return scope->state->options->gpu_id;
+}
+
 static void
 display_field(struct decode_scope *scope, const char *field_name)
 {