path: root/gcc/config/sh/sh.opt

; Options for the SH port of the compiler.

; Copyright (C) 2005-2017 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
; GCC is free software; you can redistribute it and/or modify it under
; the terms of the GNU General Public License as published by the Free
; Software Foundation; either version 3, or (at your option) any later
; version.
;
; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
; WARRANTY; without even the implied warranty of MERCHANTABILITY or
; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
; for more details.
;
; You should have received a copy of the GNU General Public License
; along with GCC; see the file COPYING3.  If not see
; <http://www.gnu.org/licenses/>.

;; Used for various architecture options.
Mask(SH_E)

;; Set if the default precision of the FPU is single.
Mask(FPU_SINGLE)

;; Set if the a double-precision FPU is present but is restricted to
;; single precision usage only.
Mask(FPU_SINGLE_ONLY)

;; Set if we should generate code using type 2A insns.
Mask(HARD_SH2A)

;; Set if we should generate code using type 2A DF insns.
Mask(HARD_SH2A_DOUBLE)

;; Set if compiling for SH4 hardware (to be used for insn costs etc.)
Mask(HARD_SH4)

m1
Target RejectNegative Mask(SH1) Condition(SUPPORT_SH1)
Generate SH1 code.

m2
Target RejectNegative Mask(SH2) Condition(SUPPORT_SH2)
Generate SH2 code.

m2a
Target RejectNegative Condition(SUPPORT_SH2A)
Generate default double-precision SH2a-FPU code.

m2a-nofpu
Target RejectNegative Condition(SUPPORT_SH2A_NOFPU)
Generate SH2a FPU-less code.

m2a-single
Target RejectNegative Condition(SUPPORT_SH2A_SINGLE)
Generate default single-precision SH2a-FPU code.

m2a-single-only
Target RejectNegative Condition(SUPPORT_SH2A_SINGLE_ONLY)
Generate only single-precision SH2a-FPU code.

m2e
Target RejectNegative Condition(SUPPORT_SH2E)
Generate SH2e code.

m3
Target RejectNegative Mask(SH3) Condition(SUPPORT_SH3)
Generate SH3 code.

m3e
Target RejectNegative Condition(SUPPORT_SH3E)
Generate SH3e code.

m4
Target RejectNegative Mask(SH4) Condition(SUPPORT_SH4)
Generate SH4 code.

m4-100
Target RejectNegative Condition(SUPPORT_SH4)
Generate SH4-100 code.

m4-200
Target RejectNegative Condition(SUPPORT_SH4)
Generate SH4-200 code.

;; TARGET_SH4_300 indicates if we have the ST40-300 instruction set and
;; pipeline - irrespective of ABI.
m4-300
Target RejectNegative Condition(SUPPORT_SH4) Var(TARGET_SH4_300)
Generate SH4-300 code.

m4-nofpu
Target RejectNegative Condition(SUPPORT_SH4_NOFPU)
Generate SH4 FPU-less code.

m4-100-nofpu
Target RejectNegative Condition(SUPPORT_SH4_NOFPU)
Generate SH4-100 FPU-less code.

m4-200-nofpu
Target RejectNegative Condition(SUPPORT_SH4_NOFPU)
Generate SH4-200 FPU-less code.

m4-300-nofpu
Target RejectNegative Condition(SUPPORT_SH4_NOFPU) Var(TARGET_SH4_300)
Generate SH4-300 FPU-less code.

m4-340
Target RejectNegative Condition(SUPPORT_SH4_NOFPU) Var(TARGET_SH4_300)
Generate code for SH4 340 series (MMU/FPU-less).
;; passes -isa=sh4-nommu-nofpu to the assembler.

m4-400
Target RejectNegative Condition(SUPPORT_SH4_NOFPU)
Generate code for SH4 400 series (MMU/FPU-less).
;; passes -isa=sh4-nommu-nofpu to the assembler.

m4-500
Target RejectNegative Condition(SUPPORT_SH4_NOFPU)
Generate code for SH4 500 series (FPU-less).
;; passes -isa=sh4-nofpu to the assembler.

m4-single
Target RejectNegative Condition(SUPPORT_SH4_SINGLE)
Generate default single-precision SH4 code.

m4-100-single
Target RejectNegative Condition(SUPPORT_SH4_SINGLE)
Generate default single-precision SH4-100 code.

m4-200-single
Target RejectNegative Condition(SUPPORT_SH4_SINGLE)
Generate default single-precision SH4-200 code.

m4-300-single
Target RejectNegative Condition(SUPPORT_SH4_SINGLE) Var(TARGET_SH4_300)
Generate default single-precision SH4-300 code.

m4-single-only
Target RejectNegative Condition(SUPPORT_SH4_SINGLE_ONLY)
Generate only single-precision SH4 code.

m4-100-single-only
Target RejectNegative Condition(SUPPORT_SH4_SINGLE_ONLY)
Generate only single-precision SH4-100 code.

m4-200-single-only
Target RejectNegative Condition(SUPPORT_SH4_SINGLE_ONLY)
Generate only single-precision SH4-200 code.

m4-300-single-only
Target RejectNegative Condition(SUPPORT_SH4_SINGLE_ONLY) Var(TARGET_SH4_300)
Generate only single-precision SH4-300 code.

m4a
Target RejectNegative Mask(SH4A) Condition(SUPPORT_SH4A)
Generate SH4a code.

m4a-nofpu
Target RejectNegative Condition(SUPPORT_SH4A_NOFPU)
Generate SH4a FPU-less code.

m4a-single
Target RejectNegative Condition(SUPPORT_SH4A_SINGLE)
Generate default single-precision SH4a code.

m4a-single-only
Target RejectNegative Condition(SUPPORT_SH4A_SINGLE_ONLY)
Generate only single-precision SH4a code.

m4al
Target RejectNegative Condition(SUPPORT_SH4AL)
Generate SH4al-dsp code.

maccumulate-outgoing-args
Target Report Var(TARGET_ACCUMULATE_OUTGOING_ARGS) Init(1)
Reserve space for outgoing arguments in the function prologue.

mb
Target Report RejectNegative InverseMask(LITTLE_ENDIAN)
Generate code in big endian mode.

mbigtable
Target Report RejectNegative Mask(BIGTABLE)
Generate 32-bit offsets in switch tables.

mbitops
Target Report RejectNegative Mask(BITOPS)
Generate bit instructions.

mbranch-cost=
Target RejectNegative Joined UInteger Var(sh_branch_cost) Init(-1)
Cost to assume for a branch insn.

mzdcbranch
Target Report Var(TARGET_ZDCBRANCH)
Assume that zero displacement conditional branches are fast.

mcbranch-force-delay-slot
Target Report RejectNegative Var(TARGET_CBRANCH_FORCE_DELAY_SLOT) Init(0)
Force the usage of delay slots for conditional branches.

mdalign
Target Report RejectNegative Mask(ALIGN_DOUBLE)
Align doubles at 64-bit boundaries.

mdiv=
Target RejectNegative Joined Var(sh_div_str) Init("")
Division strategy, one of: call-div1, call-fp, call-table.

mdivsi3_libfunc=
Target RejectNegative Joined Var(sh_divsi3_libfunc) Init("")
Specify name for 32 bit signed division function.

mfdpic
Target Report Var(TARGET_FDPIC) Init(0)
Generate ELF FDPIC code.

mfmovd
Target RejectNegative Mask(FMOVD)
Enable the use of 64-bit floating point registers in fmov instructions.  See -mdalign if 64-bit alignment is required.

mfixed-range=
Target RejectNegative Joined Var(sh_fixed_range_str)
Specify range of registers to make fixed.

mhitachi
Target Report RejectNegative Mask(HITACHI)
Follow Renesas (formerly Hitachi) / SuperH calling conventions.

mieee
Target Var(TARGET_IEEE)
Increase the IEEE compliance for floating-point comparisons.

minline-ic_invalidate
Target Report Var(TARGET_INLINE_IC_INVALIDATE)
inline code to invalidate instruction cache entries after setting up nested function trampolines.

misize
Target Report RejectNegative Mask(DUMPISIZE)
Annotate assembler instructions with estimated addresses.

ml
Target Report RejectNegative Mask(LITTLE_ENDIAN)
Generate code in little endian mode.

mnomacsave
Target Report RejectNegative Mask(NOMACSAVE)
Mark MAC register as call-clobbered.

;; ??? This option is not useful, but is retained in case there are people
;; who are still relying on it.  It may be deleted in the future.
mpadstruct
Target Report RejectNegative Mask(PADSTRUCT)
Make structs a multiple of 4 bytes (warning: ABI altered).

mprefergot
Target Report RejectNegative Mask(PREFERGOT)
Emit function-calls using global offset table when generating PIC.

mrelax
Target Report RejectNegative Mask(RELAX)
Shorten address references during linking.

mrenesas
Target Mask(HITACHI)
Follow Renesas (formerly Hitachi) / SuperH calling conventions.

matomic-model=
Target Report RejectNegative Joined Var(sh_atomic_model_str)
Specify the model for atomic operations.

mtas
Target Report RejectNegative Var(TARGET_ENABLE_TAS)
Use tas.b instruction for __atomic_test_and_set.

multcost=
Target RejectNegative Joined UInteger Var(sh_multcost) Init(-1)
Cost to assume for a multiply insn.

musermode
Target Var(TARGET_USERMODE)
Don't generate privileged-mode only code; implies -mno-inline-ic_invalidate if the inline code would not work in user mode.

;; We might want to enable this by default for TARGET_HARD_SH4, because
;; zero-offset branches have zero latency.  Needs some benchmarking.
mpretend-cmove
Target Var(TARGET_PRETEND_CMOVE)
Pretend a branch-around-a-move is a conditional move.

mfsca
Target Var(TARGET_FSCA)
Enable the use of the fsca instruction.

mfsrra
Target Var(TARGET_FSRRA)
Enable the use of the fsrra instruction.

mlra
Target Report Var(sh_lra_flag) Init(0) Save
Use LRA instead of reload (transitional).