Add support for Loongson EXT2 instructions.
gcc/
* config/mips/mips-protos.h
(mips_loongson_ext2_prefetch_cookie): New prototype.
* config/mips/mips.c (mips_loongson_ext2_prefetch_cookie): New.
(mips_option_override): Enable TARGET_LOONGSON_EXT when
TARGET_LOONGSON_EXT2 is true.
* config/mips/mips.h (TARGET_CPU_CPP_BUILTINS): Define
__mips_loongson_ext2, __mips_loongson_ext_rev=2.
(ISA_HAS_CTZ_CTO): New, true if TARGET_LOONGSON_EXT2.
(ISA_HAS_PREFETCH): Include TARGET_LOONGSON_EXT and
TARGET_LOONGSON_EXT2.
(ASM_SPEC): Add mloongson-ext2 and mno-loongson-ext2.
(define_insn "ctz<mode>2"): New insn pattern.
(define_insn "prefetch"): Include TARGET_LOONGSON_EXT2.
(define_insn "prefetch_indexed_<mode>"): Include
TARGET_LOONGSON_EXT and TARGET_LOONGSON_EXT2.
* config/mips/mips.opt (-mloongson-ext2): Add option.
* gcc/doc/invoke.texi (-mloongson-ext2): Document.
gcc/testsuite/
* gcc.target/mips/loongson-ctz.c: New test.
* gcc.target/mips/loongson-dctz.c: Likewise.
* gcc.target/mips/mips.exp (mips_option_groups): Add
-mloongson-ext2 option.
From-SVN: r265864