1 @c Copyright (C) 2001-2015 Free Software Foundation, Inc.
2 @c This is part of the GAS manual.
3 @c For copying conditions, see the file as.texinfo.
8 @chapter PowerPC Dependent Features
11 @node Machine Dependencies
12 @chapter PowerPC Dependent Features
15 @cindex PowerPC support
17 * PowerPC-Opts:: Options
18 * PowerPC-Pseudo:: PowerPC Assembler Directives
19 * PowerPC-Syntax:: PowerPC Syntax
25 @cindex options for PowerPC
26 @cindex PowerPC options
27 @cindex architectures, PowerPC
28 @cindex PowerPC architectures
29 The PowerPC chip family includes several successive levels, using the same
30 core instruction set, but including a few additional instructions at
31 each level. There are exceptions to this however. For details on what
32 instructions each variant supports, please see the chip's architecture
35 The following table lists all available PowerPC options.
40 Generate ELF32 or XCOFF32.
43 Generate ELF64 or XCOFF64.
46 Set EF_PPC_RELOCATABLE_LIB in ELF flags.
49 Generate code for POWER/2 (RIOS2).
52 Generate code for POWER (RIOS1)
55 Generate code for PowerPC 601.
57 @item -mppc, -mppc32, -m603, -m604
58 Generate code for PowerPC 603/604.
61 Generate code for PowerPC 403/405.
64 Generate code for PowerPC 440. BookE and some 405 instructions.
67 Generate code for PowerPC 464.
70 Generate code for PowerPC 476.
72 @item -m7400, -m7410, -m7450, -m7455
73 Generate code for PowerPC 7400/7410/7450/7455.
76 Generate code for PowerPC 750CL.
79 Generate code for PowerPC 620/625/630.
81 @item -me500, -me500x2
82 Generate code for Motorola e500 core complex.
85 Generate code for Freescale e500mc core complex.
88 Generate code for Freescale e500mc64 core complex.
91 Generate code for Freescale e5500 core complex.
94 Generate code for Freescale e6500 core complex.
97 Generate code for Motorola SPE instructions.
100 Generate code for AppliedMicro Titan core complex.
103 Generate code for PowerPC 64, including bridge insns.
106 Generate code for 32-bit BookE.
109 Generate code for A2 architecture.
112 Generate code for PowerPC e300 family.
115 Generate code for processors with AltiVec instructions.
118 Generate code for Freescale PowerPC VLE instructions.
121 Generate code for processors with Vector-Scalar (VSX) instructions.
124 Generate code for processors with Hardware Transactional Memory instructions.
126 @item -mpower4, -mpwr4
127 Generate code for Power4 architecture.
129 @item -mpower5, -mpwr5, -mpwr5x
130 Generate code for Power5 architecture.
132 @item -mpower6, -mpwr6
133 Generate code for Power6 architecture.
135 @item -mpower7, -mpwr7
136 Generate code for Power7 architecture.
138 @item -mpower8, -mpwr8
139 Generate code for Power8 architecture.
143 Generate code for Cell Broadband Engine architecture.
146 Generate code Power/PowerPC common instructions.
149 Generate code for any architecture (PWR/PWRX/PPC).
152 Allow symbolic names for registers.
155 Do not allow symbolic names for registers.
158 Support for GCC's -mrelocatable option.
160 @item -mrelocatable-lib
161 Support for GCC's -mrelocatable-lib option.
164 Set PPC_EMB bit in ELF flags.
166 @item -mlittle, -mlittle-endian, -le
167 Generate code for a little endian machine.
169 @item -mbig, -mbig-endian, -be
170 Generate code for a big endian machine.
173 Generate code for Solaris.
176 Do not generate code for Solaris.
178 @item -nops=@var{count}
179 If an alignment directive inserts more than @var{count} nops, put a
180 branch at the beginning to skip execution of the nops.
186 @section PowerPC Assembler Directives
188 @cindex directives for PowerPC
189 @cindex PowerPC directives
190 A number of assembler directives are available for PowerPC. The
191 following table is far from complete.
194 @item .machine "string"
195 This directive allows you to change the machine for which code is
196 generated. @code{"string"} may be any of the -m cpu selection options
197 (without the -m) enclosed in double quotes, @code{"push"}, or
198 @code{"pop"}. @code{.machine "push"} saves the currently selected
199 cpu, which may be restored with @code{.machine "pop"}.
203 @section PowerPC Syntax
205 * PowerPC-Chars:: Special Characters
209 @subsection Special Characters
211 @cindex line comment character, PowerPC
212 @cindex PowerPC line comment character
213 The presence of a @samp{#} on a line indicates the start of a comment
214 that extends to the end of the current line.
216 If a @samp{#} appears as the first character of a line then the whole
217 line is treated as a comment, but in this case the line could also be
218 a logical line number directive (@pxref{Comments}) or a preprocessor
219 control command (@pxref{Preprocessing}).
221 If the assembler has been configured for the ppc-*-solaris* target
222 then the @samp{!} character also acts as a line comment character.
223 This can be disabled via the @option{-mno-solaris} command line
226 @cindex line separator, PowerPC
227 @cindex statement separator, PowerPC
228 @cindex PowerPC line separator
229 The @samp{;} character can be used to separate statements on the same