NV fp parser: Add support for condition codes

Conditional write masks and the condition-code based KIL instruction
are all supported.  The specific behavior of KIL in the following
shader may or may not match the behavior of other implementations:

!!ARBfp1.0
	TEMP	GT;
	MOVC	GT, fragment.texcoord[0];
	KIL	GT.x;
	END

Should be it interpreted as 'KIL srcReg' or as 'KIL ccTest'?  The
current parser will interpret it as 'KIL srcReg'.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/mesa/shader/program_parser.h b/src/mesa/shader/program_parser.h
index 497891f53d..bce6041381 100644
--- a/src/mesa/shader/program_parser.h
+++ b/src/mesa/shader/program_parser.h
@@ -278,4 +278,17 @@ extern int _mesa_ARBfp_parse_option(struct asm_parser_state *state,
 extern int _mesa_parse_instruction_suffix(const struct asm_parser_state *state,
     const char *suffix, struct prog_instruction *inst);
 
+/**
+ * Parses a condition code name
+ *
+ * The condition code names (e.g., \c LT, \c GT, \c NE) were added to assembly
+ * shaders with the \c GL_NV_fragment_program_option extension.  This function
+ * converts a string representation into one of the \c COND_ macros.
+ *
+ * \return
+ * One of the \c COND_ macros defined in prog_instruction.h on success or zero
+ * on failure.
+ */
+extern int _mesa_parse_cc(const char *s);
+
 /*@}*/