Implement MIPS o32 FPXX, FP64, FP64A ABI extensions.
2014-11-12 Matthew Fortune <matthew.fortune@imgtec.com>
gcc/
* common/config/mips/mips-common.c (mips_handle_option): Ensure
that -mfp32, -mfp64 disable -mfpxx and -mfpxx disables -mfp64.
* config.gcc (--with-fp-32): New option.
(--with-odd-spreg-32): Likewise.
* config.in (HAVE_AS_DOT_MODULE): New config define.
* config/mips/mips-protos.h
(mips_secondary_memory_needed): New prototype.
(mips_hard_regno_caller_save_mode): Likewise.
* config/mips/mips.c (mips_get_reg_raw_mode): New static prototype.
(mips_get_arg_info): Assert that V2SFmode is only handled specially
with TARGET_PAIRED_SINGLE_FLOAT.
(mips_return_mode_in_fpr_p): Likewise.
(mips16_call_stub_mode_suffix): Likewise.
(mips_get_reg_raw_mode): New static function.
(mips_return_fpr_pair): O32 return values span two registers.
(mips16_build_call_stub): Likewise.
(mips_function_value_regno_p): Support both FP return registers.
(mips_output_64bit_xfer): Use mthc1 whenever TARGET_HAS_MXHC1. Add
specific cases for TARGET_FPXX to move via memory.
(mips_dwarf_register_span): For TARGET_FPXX pretend that modes larger
than UNITS_PER_FPREG 'span' one register.
(mips_dwarf_frame_reg_mode): New static function.
(mips_file_start): Switch to using .module instead of .gnu_attribute.
No longer support FP ABI 4 (-mips32r2 -mfp64), replace with FP ABI 6.
Add FP ABI 5 (-mfpxx) and FP ABI 7 (-mfp64 -mno-odd-spreg).
(mips_save_reg, mips_restore_reg): Always represent DFmode frame
slots with two CFI directives even for O32 FP64.
(mips_for_each_saved_gpr_and_fpr): Account for fixed_regs when
saving/restoring callee-saved registers.
(mips_hard_regno_mode_ok_p): Implement O32 FP64A extension.
(mips_secondary_memory_needed): New function.
(mips_option_override): ABI check for TARGET_FLOATXX. Disable
odd-numbered single-precision registers when using TARGET_FLOATXX.
Implement -modd-spreg and defaults.
(mips_conditional_register_usage): Redefine O32 FP64 to match O32 FP32
callee-saved behaviour.
(mips_hard_regno_caller_save_mode): Implement.
(TARGET_GET_RAW_RESULT_MODE): Define target hook.
(TARGET_GET_RAW_ARG_MODE): Define target hook.
(TARGET_DWARF_FRAME_REG_MODE): Define target hook.
* config/mips/mips.h (TARGET_FLOAT32): New macro.
(TARGET_O32_FP64A_ABI): Likewise.
(TARGET_CPU_CPP_BUILTINS): TARGET_FPXX is __mips_fpr==0. Add
_MIPS_SPFPSET builtin define.
(MIPS_FPXX_OPTION_SPEC): New macro.
(OPTION_DEFAULT_SPECS): Pass through --with-fp-32=* to -mfp and
--with-odd-spreg-32=* to -m[no-]odd-spreg.
(ISA_HAS_ODD_SPREG): New macro.
(ISA_HAS_MXHC1): True for anything other than -mfp32.
(ASM_SPEC): Pass through mfpxx, mfp64, -mno-odd-spreg and -modd-spreg.
(MIN_FPRS_PER_FMT): Redefine in terms of TARGET_ODD_SPREG.
(HARD_REGNO_CALLER_SAVE_MODE): Define. Implement O32 FPXX extension
(HARD_REGNO_CALL_PART_CLOBBERED): Likewise.
(SECONDARY_MEMORY_NEEDED): Likewise.
(FUNCTION_ARG_REGNO_P): Update for O32 FPXX and FP64 extensions.
* config/mips/mips.md (define_attr enabled): Implement O32 FPXX and
FP64A ABI extensions.
(move_doubleword_fpr<mode>): Use ISA_HAS_MXHC1 instead of
TARGET_FLOAT64.
* config/mips/mips.opt (mfpxx): New target option.
(modd-spreg): Likewise.
* config/mips/mti-elf.h (DRIVER_SELF_SPECS): Infer FP ABI from arch.
* config/mips/mti-linux.h (DRIVER_SELF_SPECS): Likewise and remove
fp64 sysroot.
* config/mips/t-mti-elf: Remove fp64 multilib.
* config/mips/t-mti-linux: Likewise.
* configure.ac: Detect .module support.
* configure: Regenerate.
* doc/invoke.texi: Document -mfpxx, -modd-spreg, -mno-odd-spreg option.
* doc/install.texi (--with-fp-32, --with-odd-spreg-32): Document new
options.
gcc/testsuite/
* gcc.target/mips/args-1.c: Handle __mips_fpr == 0.
* gcc.target/mips/call-clobbered-1.c: New.
* gcc.target/mips/call-clobbered-2.c: New.
* gcc.target/mips/call-clobbered-3.c: New.
* gcc.target/mips/call-clobbered-4.c: New.
* gcc.target/mips/call-clobbered-5.c: New.
* gcc.target/mips/call-saved-4.c: New.
* gcc.target/mips/call-saved-5.c: New.
* gcc.target/mips/call-saved-6.c: New.
* gcc.target/mips/mips.exp: Support -mfpxx, -ffixed-f*,
and -m[no-]odd-spreg. Use _MIPS_SPFPSET to determine default
odd-spreg option. Account for -modd-spreg in minimum arch code.
* gcc.target/mips/movdf-1.c: New.
* gcc.target/mips/movdf-2.c: New.
* gcc.target/mips/movdf-3.c: New.
* gcc.target/mips/oddspreg-1.c: New.
* gcc.target/mips/oddspreg-2.c: New.
* gcc.target/mips/oddspreg-3.c: New.
* gcc.target/mips/oddspreg-4.c: New.
* gcc.target/mips/oddspreg-5.c: New.
* gcc.target/mips/oddspreg-6.c: New.
libgcc/
* config/mips/mips16.S: Set .module when supported. Update O32
FP64 calling convention and use for FPXX when possible. Add FPXX
calling convention fallback case.
From-SVN: r217446
050af1445b