1 ; Options for the rs6000 port of the compiler
3 ; Copyright (C) 2005 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 2, 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 COPYING. If not, write to the Free
20 ; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
24 Target Report RejectNegative Mask(POWER)
25 Use POWER instruction set
28 Target Report RejectNegative
29 Do not use POWER instruction set
32 Target Report Mask(POWER2)
33 Use POWER2 instruction set
36 Target Report RejectNegative Mask(POWERPC)
37 Use PowerPC instruction set
40 Target Report RejectNegative
41 Do not use PowerPC instruction set
44 Target Report Mask(POWERPC64)
45 Use PowerPC-64 instruction set
48 Target Report Mask(PPC_GPOPT)
49 Use PowerPC General Purpose group optional instructions
52 Target Report Mask(PPC_GFXOPT)
53 Use PowerPC Graphics group optional instructions
56 Target Report Mask(MFCRF)
57 Use PowerPC V2.01 single field mfcr instruction
60 Target Report Mask(POPCNTB)
61 Use PowerPC V2.02 popcntb instruction
64 Target Report Mask(FPRND)
65 Use PowerPC V2.02 floating point rounding instructions
68 Target Report Mask(MFPGPR)
69 Use extended PowerPC V2.05 move floating point to/from GPR instructions
72 Target Report Mask(ALTIVEC)
73 Use AltiVec instructions
76 Target Report Mask(MULHW)
77 Use 4xx half-word multiply instructions
80 Target Report Mask(DLMZB)
81 Use 4xx string-search dlmzb instruction
84 Target Report Mask(MULTIPLE)
85 Generate load/store multiple instructions
88 Target Report Mask(STRING)
89 Generate string instructions for block moves
92 Target Report RejectNegative Mask(NEW_MNEMONICS)
93 Use new mnemonics for PowerPC architecture
96 Target Report RejectNegative InverseMask(NEW_MNEMONICS)
97 Use old mnemonics for PowerPC architecture
100 Target Report RejectNegative Mask(SOFT_FLOAT)
101 Do not use hardware floating point
104 Target Report RejectNegative InverseMask(SOFT_FLOAT, HARD_FLOAT)
105 Use hardware floating point
108 Target Report RejectNegative Mask(NO_UPDATE)
109 Do not generate load/store with update instructions
112 Target Report RejectNegative InverseMask(NO_UPDATE, UPDATE)
113 Generate load/store with update instructions
116 Target Report RejectNegative Mask(NO_FUSED_MADD)
117 Do not generate fused multiply/add instructions
120 Target Report RejectNegative InverseMask(NO_FUSED_MADD, FUSED_MADD)
121 Generate fused multiply/add instructions
124 Target Report Var(TARGET_SCHED_PROLOG) Init(1)
125 Schedule the start and end of the procedure
128 Target Undocumented Var(TARGET_SCHED_PROLOG) VarExists
131 Target Report RejectNegative Var(aix_struct_return)
132 Return all structures in memory (AIX default)
135 Target Report RejectNegative Var(aix_struct_return,0) VarExists
136 Return small structures in registers (SVR4 default)
139 Target Report Var(TARGET_XL_COMPAT)
140 Conform more closely to IBM XLC semantics
143 Target Report Var(swdiv)
144 Generate software floating point divide for better throughput
147 Target Report RejectNegative Var(TARGET_NO_FP_IN_TOC)
148 Do not place floating point constants in TOC
151 Target Report RejectNegative Var(TARGET_NO_FP_IN_TOC,0)
152 Place floating point constants in TOC
155 Target RejectNegative Var(TARGET_NO_SUM_IN_TOC)
156 Do not place symbol+offset constants in TOC
159 Target RejectNegative Var(TARGET_NO_SUM_IN_TOC,0) VarExists
160 Place symbol+offset constants in TOC
162 ; Output only one TOC entry per module. Normally linking fails if
163 ; there are more than 16K unique variables/constants in an executable. With
164 ; this option, linking fails only if there are more than 16K modules, or
165 ; if there are more than 16K unique variables/constant in a single module.
167 ; This is at the cost of having 2 extra loads and one extra store per
168 ; function, and one less allocable register.
170 Target Report Mask(MINIMAL_TOC)
171 Use only one TOC entry per procedure
175 Put everything in the regular TOC
178 Target Report Var(TARGET_ALTIVEC_VRSAVE)
179 Generate VRSAVE instructions when generating AltiVec code
182 Target RejectNegative Joined
183 -mvrsave=yes/no Deprecated option. Use -mvrsave/-mno-vrsave instead
186 Target Var(rs6000_isel)
187 Generate isel instructions
190 Target RejectNegative Joined
191 -misel=yes/no Deprecated option. Use -misel/-mno-isel instead
194 Target Var(rs6000_spe)
195 Generate SPE SIMD instructions on E500
198 Target RejectNegative Joined
199 -mspe=yes/no Deprecated option. Use -mspe/-mno-spe instead
202 Target RejectNegative Joined
203 -mdebug= Enable debug output
206 Target RejectNegative Joined
207 -mabi= Specify ABI to use
210 Target RejectNegative Joined
211 -mcpu= Use features of and schedule code for given CPU
214 Target RejectNegative Joined
215 -mtune= Schedule code for given CPU
218 Target RejectNegative Joined
219 -mtraceback= Select full, part, or no traceback table
222 Target Report Var(rs6000_default_long_calls)
223 Avoid all range limits on call instructions
226 Target Var(rs6000_warn_altivec_long) Init(1)
227 Warn about deprecated 'vector long ...' AltiVec type usage
230 Target RejectNegative Joined
231 -mfloat-gprs= Select GPR floating point method
234 Target RejectNegative Joined UInteger
235 -mlong-double-<n> Specify size of long double (64 or 128 bits)
238 Target RejectNegative Joined
239 Determine which dependences between insns are considered costly
242 Target RejectNegative Joined
243 Specify which post scheduling nop insertion scheme to apply
246 Target RejectNegative Joined
247 Specify alignment of structure fields default/natural
249 mprioritize-restricted-insns=
250 Target RejectNegative Joined UInteger Var(rs6000_sched_restricted_insns_priority)
251 Specify scheduling priority for dispatch slot restricted insns