1 ; Options for the rs6000 port of the compiler
3 ; Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
4 ; Contributed by Aldy Hernandez <aldy@quesejoda.com>.
6 ; This file is part of GCC.
8 ; GCC is free software; you can redistribute it and/or modify it under
9 ; the terms of the GNU General Public License as published by the Free
10 ; Software Foundation; either version 3, or (at your option) any later
13 ; GCC is distributed in the hope that it will be useful, but WITHOUT
14 ; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 ; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 ; License for more details.
18 ; You should have received a copy of the GNU General Public License
19 ; along with GCC; see the file COPYING3. If not see
20 ; <http://www.gnu.org/licenses/>.
23 Target Report RejectNegative Mask(POWER)
24 Use POWER instruction set
27 Target Report RejectNegative
28 Do not use POWER instruction set
31 Target Report Mask(POWER2)
32 Use POWER2 instruction set
35 Target Report RejectNegative Mask(POWERPC)
36 Use PowerPC instruction set
39 Target Report RejectNegative
40 Do not use PowerPC instruction set
43 Target Report Mask(POWERPC64)
44 Use PowerPC-64 instruction set
47 Target Report Mask(PPC_GPOPT)
48 Use PowerPC General Purpose group optional instructions
51 Target Report Mask(PPC_GFXOPT)
52 Use PowerPC Graphics group optional instructions
55 Target Report Mask(MFCRF)
56 Use PowerPC V2.01 single field mfcr instruction
59 Target Report Mask(POPCNTB)
60 Use PowerPC V2.02 popcntb instruction
63 Target Report Mask(FPRND)
64 Use PowerPC V2.02 floating point rounding instructions
67 Target Report Mask(CMPB)
68 Use PowerPC V2.05 compare bytes instruction
71 Target Report Mask(MFPGPR)
72 Use extended PowerPC V2.05 move floating point to/from GPR instructions
75 Target Report Mask(ALTIVEC)
76 Use AltiVec instructions
79 Target Report Mask(DFP)
80 Use decimal floating point instructions
83 Target Report Mask(MULHW)
84 Use 4xx half-word multiply instructions
87 Target Report Mask(DLMZB)
88 Use 4xx string-search dlmzb instruction
91 Target Report Mask(MULTIPLE)
92 Generate load/store multiple instructions
95 Target Report Mask(STRING)
96 Generate string instructions for block moves
99 Target Report RejectNegative Mask(NEW_MNEMONICS)
100 Use new mnemonics for PowerPC architecture
103 Target Report RejectNegative InverseMask(NEW_MNEMONICS)
104 Use old mnemonics for PowerPC architecture
107 Target Report RejectNegative Mask(SOFT_FLOAT)
108 Do not use hardware floating point
111 Target Report RejectNegative InverseMask(SOFT_FLOAT, HARD_FLOAT)
112 Use hardware floating point
115 Target Report RejectNegative Mask(NO_UPDATE)
116 Do not generate load/store with update instructions
119 Target Report RejectNegative InverseMask(NO_UPDATE, UPDATE)
120 Generate load/store with update instructions
123 Target Report RejectNegative Mask(NO_FUSED_MADD)
124 Do not generate fused multiply/add instructions
127 Target Report RejectNegative InverseMask(NO_FUSED_MADD, FUSED_MADD)
128 Generate fused multiply/add instructions
131 Target Report Var(TARGET_SCHED_PROLOG) Init(1)
132 Schedule the start and end of the procedure
135 Target Undocumented Var(TARGET_SCHED_PROLOG) VarExists
138 Target Report RejectNegative Var(aix_struct_return)
139 Return all structures in memory (AIX default)
142 Target Report RejectNegative Var(aix_struct_return,0) VarExists
143 Return small structures in registers (SVR4 default)
146 Target Report Var(TARGET_XL_COMPAT)
147 Conform more closely to IBM XLC semantics
150 Target Report Var(TARGET_RECIP)
151 Generate software reciprocal sqrt for better throughput
154 Target Report RejectNegative Var(TARGET_NO_FP_IN_TOC)
155 Do not place floating point constants in TOC
158 Target Report RejectNegative Var(TARGET_NO_FP_IN_TOC,0)
159 Place floating point constants in TOC
162 Target RejectNegative Var(TARGET_NO_SUM_IN_TOC)
163 Do not place symbol+offset constants in TOC
166 Target RejectNegative Var(TARGET_NO_SUM_IN_TOC,0) VarExists
167 Place symbol+offset constants in TOC
169 ; Output only one TOC entry per module. Normally linking fails if
170 ; there are more than 16K unique variables/constants in an executable. With
171 ; this option, linking fails only if there are more than 16K modules, or
172 ; if there are more than 16K unique variables/constant in a single module.
174 ; This is at the cost of having 2 extra loads and one extra store per
175 ; function, and one less allocable register.
177 Target Report Mask(MINIMAL_TOC)
178 Use only one TOC entry per procedure
182 Put everything in the regular TOC
185 Target Report Var(TARGET_ALTIVEC_VRSAVE)
186 Generate VRSAVE instructions when generating AltiVec code
189 Target RejectNegative Joined
190 -mvrsave=yes/no Deprecated option. Use -mvrsave/-mno-vrsave instead
193 Target Var(rs6000_isel)
194 Generate isel instructions
197 Target RejectNegative Joined
198 -misel=yes/no Deprecated option. Use -misel/-mno-isel instead
201 Target Var(rs6000_spe)
202 Generate SPE SIMD instructions on E500
205 Target Var(rs6000_paired_float)
206 Generate PPC750CL paired-single instructions
209 Target RejectNegative Joined
210 -mspe=yes/no Deprecated option. Use -mspe/-mno-spe instead
213 Target RejectNegative Joined
214 -mdebug= Enable debug output
217 Target RejectNegative Joined
218 -mabi= Specify ABI to use
221 Target RejectNegative Joined
222 -mcpu= Use features of and schedule code for given CPU
225 Target RejectNegative Joined
226 -mtune= Schedule code for given CPU
229 Target RejectNegative Joined
230 -mtraceback= Select full, part, or no traceback table
233 Target Report Var(rs6000_default_long_calls)
234 Avoid all range limits on call instructions
237 Target Var(rs6000_warn_altivec_long) Init(1)
238 Warn about deprecated 'vector long ...' AltiVec type usage
241 Target RejectNegative Joined
242 -mfloat-gprs= Select GPR floating point method
245 Target RejectNegative Joined UInteger
246 -mlong-double-<n> Specify size of long double (64 or 128 bits)
249 Target RejectNegative Joined
250 Determine which dependences between insns are considered costly
253 Target RejectNegative Joined
254 Specify which post scheduling nop insertion scheme to apply
257 Target RejectNegative Joined
258 Specify alignment of structure fields default/natural
260 mprioritize-restricted-insns=
261 Target RejectNegative Joined UInteger Var(rs6000_sched_restricted_insns_priority)
262 Specify scheduling priority for dispatch slot restricted insns