1 ; Options for the IA-32 and AMD64 ports of the compiler.
3 ; Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
5 ; This file is part of GCC.
7 ; GCC is free software; you can redistribute it and/or modify it under
8 ; the terms of the GNU General Public License as published by the Free
9 ; Software Foundation; either version 3, or (at your option) any later
12 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 ; You should have received a copy of the GNU General Public License
18 ; along with GCC; see the file COPYING3. If not see
19 ; <http://www.gnu.org/licenses/>.
22 Target RejectNegative Report Mask(128BIT_LONG_DOUBLE)
23 sizeof(long double) is 16
26 Target Report Mask(80387)
30 Target RejectNegative Report InverseMask(128BIT_LONG_DOUBLE)
31 sizeof(long double) is 12
33 maccumulate-outgoing-args
34 Target Report Mask(ACCUMULATE_OUTGOING_ARGS)
35 Reserve space for outgoing arguments in the function prologue
38 Target Report Mask(ALIGN_DOUBLE)
39 Align some doubles on dword boundary
42 Target RejectNegative Joined Var(ix86_align_funcs_string)
43 Function starts are aligned to this power of 2
46 Target RejectNegative Joined Var(ix86_align_jumps_string)
47 Jump targets are aligned to this power of 2
50 Target RejectNegative Joined Var(ix86_align_loops_string)
51 Loop code aligned to this power of 2
54 Target RejectNegative Report InverseMask(NO_ALIGN_STRINGOPS, ALIGN_STRINGOPS)
55 Align destination of the string operations
58 Target RejectNegative Joined Var(ix86_arch_string)
59 Generate code for given CPU
62 Target RejectNegative Joined Var(ix86_asm_string)
63 Use given assembler dialect
66 Target RejectNegative Joined Var(ix86_branch_cost_string)
67 Branches are this expensive (1-5, arbitrary units)
69 mlarge-data-threshold=
70 Target RejectNegative Joined Var(ix86_section_threshold_string)
71 Data greater than given threshold will go into .ldata section in x86-64 medium model
74 Target RejectNegative Joined Var(ix86_cmodel_string)
75 Use given x86-64 code model
78 Target RejectNegative Report InverseMask(NO_FANCY_MATH_387, USE_FANCY_MATH_387)
79 Generate sin, cos, sqrt for FPU
82 Target Report Mask(FLOAT_RETURNS)
83 Return values of functions in FPU registers
86 Target RejectNegative Joined Var(ix86_fpmath_string)
87 Generate floating point mathematics using given instruction set
90 Target RejectNegative Mask(80387) MaskExists
94 Target Report Mask(IEEE_FP)
95 Use IEEE math for fp comparisons
98 Target Report Mask(INLINE_ALL_STRINGOPS)
99 Inline all known string operations
101 minline-stringops-dynamically
102 Target Report Mask(INLINE_STRINGOPS_DYNAMICALLY)
103 Inline memset/memcpy string operations, but perform inline version only for small blocks
110 Target Report Mask(MS_BITFIELD_LAYOUT)
111 Use native (MS) bitfield layout
114 Target RejectNegative Report Mask(NO_ALIGN_STRINGOPS) Undocumented
117 Target RejectNegative Report Mask(NO_FANCY_MATH_387) Undocumented
120 Target RejectNegative Report Mask(NO_PUSH_ARGS) Undocumented
123 Target RejectNegative Report Mask(NO_RED_ZONE) Undocumented
125 momit-leaf-frame-pointer
126 Target Report Mask(OMIT_LEAF_FRAME_POINTER)
127 Omit the frame pointer in leaf functions
130 Target RejectNegative Report Joined Var(ix87_precision_string)
131 Set 80387 floating-point precision (-mpc32, -mpc64, -mpc80)
133 mpreferred-stack-boundary=
134 Target RejectNegative Joined Var(ix86_preferred_stack_boundary_string)
135 Attempt to keep stack aligned to this power of 2
138 Target Report InverseMask(NO_PUSH_ARGS, PUSH_ARGS)
139 Use push instructions to save outgoing arguments
142 Target RejectNegative Report InverseMask(NO_RED_ZONE, RED_ZONE)
143 Use red-zone in the x86-64 code
146 Target RejectNegative Joined Var(ix86_regparm_string)
147 Number of registers used to pass integer arguments
150 Target Report Mask(RTD)
151 Alternate calling convention
154 Target InverseMask(80387)
155 Do not use hardware fp
158 Target RejectNegative Mask(SSEREGPARM)
159 Use SSE register passing conventions for SF and DF mode
162 Target Report Var(ix86_force_align_arg_pointer)
163 Realign stack in prologue
166 Target Report Mask(STACK_PROBE)
170 Target RejectNegative Joined Var(ix86_stringop_string)
171 Chose strategy to generate stringop using
174 Target RejectNegative Joined Var(ix86_tls_dialect_string)
175 Use given thread-local storage dialect
178 Target Report Mask(TLS_DIRECT_SEG_REFS)
179 Use direct references against %gs when accessing tls data
182 Target RejectNegative Joined Var(ix86_tune_string)
183 Schedule code for given CPU
186 Target RejectNegative Joined Var(ix86_veclibabi_string)
187 Vector library ABI to use
192 Target RejectNegative Negative(m64) Report InverseMask(ISA_64BIT) Var(ix86_isa_flags) VarExists
193 Generate 32bit i386 code
196 Target RejectNegative Negative(m32) Report Mask(ISA_64BIT) Var(ix86_isa_flags) VarExists
197 Generate 64bit x86-64 code
200 Target Report Mask(ISA_MMX) Var(ix86_isa_flags) VarExists
201 Support MMX built-in functions
204 Target Report Mask(ISA_3DNOW) Var(ix86_isa_flags) VarExists
205 Support 3DNow! built-in functions
208 Target Undocumented Mask(ISA_3DNOW_A) Var(ix86_isa_flags) VarExists
209 Support Athlon 3Dnow! built-in functions
212 Target Report Mask(ISA_SSE) Var(ix86_isa_flags) VarExists
213 Support MMX and SSE built-in functions and code generation
216 Target Report Mask(ISA_SSE2) Var(ix86_isa_flags) VarExists
217 Support MMX, SSE and SSE2 built-in functions and code generation
220 Target Report Mask(ISA_SSE3) Var(ix86_isa_flags) VarExists
221 Support MMX, SSE, SSE2 and SSE3 built-in functions and code generation
224 Target Report Mask(ISA_SSSE3) Var(ix86_isa_flags) VarExists
225 Support MMX, SSE, SSE2, SSE3 and SSSE3 built-in functions and code generation
228 Target Report Mask(ISA_SSE4_1) Var(ix86_isa_flags) VarExists
229 Support MMX, SSE, SSE2, SSE3, SSSE3 and SSE4.1 built-in functions and code generation
232 Target Report Mask(ISA_SSE4_2) Var(ix86_isa_flags) VarExists
233 Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE4.2 built-in functions and code generation
236 Target RejectNegative Report Mask(ISA_SSE4_2) MaskExists Var(ix86_isa_flags) VarExists
237 Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE4.2 built-in functions and code generation
240 Target RejectNegative Report InverseMask(ISA_SSE4_1) MaskExists Var(ix86_isa_flags) VarExists
241 Do not support SSE4.1 and SSE4.2 built-in functions and code generation
244 Target Report Mask(ISA_SSE4A) Var(ix86_isa_flags) VarExists
245 Support MMX, SSE, SSE2, SSE3 and SSE4A built-in functions and code generation
248 Target Report Mask(ISA_SSE5) Var(ix86_isa_flags) VarExists
249 Support SSE5 built-in functions and code generation
251 ;; Instruction support
254 Target Report Mask(CLD)
255 Generate cld instruction in the function prologue.
258 Target Report RejectNegative Var(x86_abm)
259 Support code generation of Advanced Bit Manipulation (ABM) instructions.
262 Target Report RejectNegative Var(x86_cmpxchg16b)
263 Support code generation of cmpxchg16b instruction.
266 Target Report RejectNegative Var(x86_popcnt)
267 Support code generation of popcnt instruction.
270 Target Report RejectNegative Var(x86_sahf)
271 Support code generation of sahf instruction in 64bit x86-64 code.
274 Target Report RejectNegative Var(x86_recip)
275 Generate reciprocals instead of divss and sqrtss.
278 Target Report Var(x86_fused_muladd) Init(1)
279 Enable automatic generation of fused floating point multiply-add instructions
280 if the ISA supports such instructions. The -mfused-madd option is on by
284 Target Report RejectNegative Var(x86_aes)
285 Support AES built-in functions and code generation
288 Target Report RejectNegative Var(x86_pclmul)
289 Support PCLMUL built-in functions and code generation