* doc/invoke.texi: Document -mabi=meabi, and expand on the EABI

	description.  Document -mips32, -mips64, and the associated -march
	values.  Describe the "mipsN" arguments to -march.  Say that the
	-mipsN options are equivalent to -march.  Reword the description
	of default type sizes.
	* toplev.h (target_flags_explicit): Declare.
	* toplev.c (target_flags_explicit): New var.
	(set_target_switch): Update target_flags_explicit.
	* config/mips/abi64.h (SUBTARGET_TARGET_OPTIONS): Undefine.
	* config/mips/elf64.h (MIPS_ISA_DEFAULT): Undefine.
	* config/mips/iris6.h (SUBTARGET_ASM_SPEC): -mabi=64 implies -mips3.
	* config/mips/isa3264.h (MIPS_ENABLE_EMBEDDED_O32): Undefine.
	* config/mips/mips.h (mips_cpu_info): New struct.
	(mips_cpu_string, mips_explicit_type_size_string): Remove.
	(mips_cpu_info_table, mips_arch_info, mips_tune_info): Declare.
	(MIPS_CPP_SET_PROCESSOR): New macro.
	(TARGET_CPP_BUILTINS): Declare a macro for each supported processor.
	Define _MIPS_ARCH and _MIPS_TUNE.
	(MIPS_ISA_DEFAULT): Don't provide a default value.  Instead...
	(MIPS_CPU_STRING_DEFAULT): Set to "from-abi" if neither it nor
	MIPS_ISA_DEFAULT were already defined.
	(MULTILIB_DEFAULTS): Add MULTILIB_ABI_DEFAULT.
	(TARGET_OPTIONS): Remove -mcpu and -mexplicit-type-size.
	(ABI_NEEDS_32BIT_REGS, ABI_NEEDS_64BIT_REGS): New.
	(GAS_ASM_SPEC): Remove -march, -mcpu, -mgp* and -mabi rules.
	(ABI_GAS_ASM_SPEC): Remove.
	(MULTILIB_ABI_DEFAULT, ASM_ABI_DEFAULT_SPEC): New macros.
	(ASM_SPEC): Add -mgp32, -mgp64, -march, -mabi=eabi and -mabi=o64.
	Invoke %(asm_abi_default_spec) if no ABI was specified.
	(CC1_SPEC): Remove ISA -> register-size rules.
	(EXTRA_SPECS): Remove abi_gas_asm_spec.  Add asm_abi_default_spec.
	* config/mips/mips.c (mips_arch_info, mips_tune_info): New vars.
	(mips_cpu_string, mips_explicit_type_size_string): Remove.
	(mips_cpu_info_table): New array.
	(mips_set_architecture, mips_set_tune): New fns.
	(override_options): Rework to make -mipsN equivalent to -march.
	Detect more erroneous cases, including those removed from CC1_SPEC.
	Don't change the ABI based on architecture, or vice versa.
	Unify logic with GAS.
	(mips_asm_file_start): Get architecture name from mips_arch_info.
	(mips_strict_matching_cpu_name_p, mips_matching_cpu_name_p): New fns.
	(mips_parse_cpu): Take the name of the option as argument.  Handle
	'from-abi'.  Raise an error if the option is wrong.
	(mips_cpu_info_from_isa): New fn.

[gcc/testsuite]
	* gcc.dg/mips-args-[123].c: New tests.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@55747 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 35 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/mips-args-1.c b/gcc/testsuite/gcc.dg/mips-args-1.c
new file mode 100644
index 00000000000..d5799fae0e6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/mips-args-1.c
@@ -0,0 +1,35 @@
+/* Check that certain preprocessor macros are defined, and do some
+   consistency checks.  */
+/* { dg-do compile { target mips*-*-* } } */
+
+const char *compiled_for = _MIPS_ARCH;
+const char *optimized_for = _MIPS_TUNE;
+
+#if __mips_fpr != 32 && __mips_fpr != 64
+#error Bad __mips_fpr
+#endif
+
+/* Test complementary macro pairs: exactly one of each pair
+   must be defined.  */
+
+#if defined (_R3000) == defined (_R4000)
+#error _R3000 / _R4000 mismatch
+#endif
+
+#if defined (__mips_hard_float) == defined (__mips_soft_float)
+#error __mips_hard_float / __mips_soft_float mismatch
+#endif
+
+#if defined (_MIPSEL) == defined (_MIPSEB)
+#error _MIPSEL / _MIPSEB mismatch
+#endif
+
+/* Check for __mips64 consistency.  */
+
+#if defined (__mips64) != defined (_R4000)
+#error __mips64 / _R4000 mismatch
+#endif
+
+#if defined (__mips64) && __mips != 3 && __mips != 4 && __mips != 64
+#error __mips64 / __mips mismatch
+#endif