upload android base code part8
This commit is contained in:
August
parent
841ae54672
commit
5425409085
57075 changed files with 9846578 additions and 0 deletions
388
android/toolchain/binutils/binutils-2.25/gas/doc/c-msp430.texi
Normal file
388
android/toolchain/binutils/binutils-2.25/gas/doc/c-msp430.texi
Normal file
|
|
@ -0,0 +1,388 @@
|
|||
@c Copyright (C) 2002-2014 Free Software Foundation, Inc.
|
||||
@c This is part of the GAS manual.
|
||||
@c For copying conditions, see the file as.texinfo.
|
||||
@ifset GENERIC
|
||||
@page
|
||||
@node MSP430-Dependent
|
||||
@chapter MSP 430 Dependent Features
|
||||
@end ifset
|
||||
@ifclear GENERIC
|
||||
@node Machine Dependencies
|
||||
@chapter MSP 430 Dependent Features
|
||||
@end ifclear
|
||||
|
||||
@cindex MSP 430 support
|
||||
@cindex 430 support
|
||||
@menu
|
||||
* MSP430 Options:: Options
|
||||
* MSP430 Syntax:: Syntax
|
||||
* MSP430 Floating Point:: Floating Point
|
||||
* MSP430 Directives:: MSP 430 Machine Directives
|
||||
* MSP430 Opcodes:: Opcodes
|
||||
* MSP430 Profiling Capability:: Profiling Capability
|
||||
@end menu
|
||||
|
||||
@node MSP430 Options
|
||||
@section Options
|
||||
@cindex MSP 430 options (none)
|
||||
@cindex options for MSP430 (none)
|
||||
@table @code
|
||||
|
||||
@item -mmcu
|
||||
selects the mcu architecture. If the architecture is 430Xv2 then this
|
||||
also enables NOP generation unless the @option{-mN} is also specified.
|
||||
|
||||
@item -mcpu
|
||||
selects the cpu architecture. If the architecture is 430Xv2 then this
|
||||
also enables NOP generation unless the @option{-mN} is also specified.
|
||||
|
||||
@item -mP
|
||||
enables polymorph instructions handler.
|
||||
|
||||
@item -mQ
|
||||
enables relaxation at assembly time. DANGEROUS!
|
||||
|
||||
@item -ml
|
||||
indicates that the input uses the large code model.
|
||||
|
||||
@item -mn
|
||||
enables the generation of a NOP instruction following any instruction
|
||||
that might change the interrupts enabled/disabled state. The
|
||||
pipelined nature of the MSP430 core means that any instruction that
|
||||
changes the interrupt state (@code{EINT}, @code{DINT}, @code{BIC #8,
|
||||
SR}, @code{BIS #8, SR} or @code{MOV.W <>, SR}) must be
|
||||
followed by a NOP instruction in order to ensure the correct
|
||||
processing of interrupts. By default it is up to the programmer to
|
||||
supply these NOP instructions, but this command line option enables
|
||||
the automatic insertion by the assembler, if they are missing.
|
||||
|
||||
@item -mN
|
||||
disables the generation of a NOP instruction following any instruction
|
||||
that might change the interrupts enabled/disabled state. This is the
|
||||
default behaviour.
|
||||
|
||||
@item -my
|
||||
tells the assembler to generate a warning message if a NOP does not
|
||||
immediately forllow an instruction that enables or disables
|
||||
interrupts. This is the default.
|
||||
|
||||
Note that this option can be stacked with the @option{-mn} option so
|
||||
that the assembler will both warn about missing NOP instructions and
|
||||
then insert them automatically.
|
||||
|
||||
@item -mY
|
||||
disables warnings about missing NOP instructions.
|
||||
|
||||
@item -md
|
||||
mark the object file as one that requires data to copied from ROM to
|
||||
RAM at execution startup. Disabled by default.
|
||||
|
||||
@end table
|
||||
|
||||
@node MSP430 Syntax
|
||||
@section Syntax
|
||||
@menu
|
||||
* MSP430-Macros:: Macros
|
||||
* MSP430-Chars:: Special Characters
|
||||
* MSP430-Regs:: Register Names
|
||||
* MSP430-Ext:: Assembler Extensions
|
||||
@end menu
|
||||
|
||||
@node MSP430-Macros
|
||||
@subsection Macros
|
||||
|
||||
@cindex Macros, MSP 430
|
||||
@cindex MSP 430 macros
|
||||
The macro syntax used on the MSP 430 is like that described in the MSP
|
||||
430 Family Assembler Specification. Normal @code{@value{AS}}
|
||||
macros should still work.
|
||||
|
||||
Additional built-in macros are:
|
||||
|
||||
@table @code
|
||||
|
||||
@item llo(exp)
|
||||
Extracts least significant word from 32-bit expression 'exp'.
|
||||
|
||||
@item lhi(exp)
|
||||
Extracts most significant word from 32-bit expression 'exp'.
|
||||
|
||||
@item hlo(exp)
|
||||
Extracts 3rd word from 64-bit expression 'exp'.
|
||||
|
||||
@item hhi(exp)
|
||||
Extracts 4rd word from 64-bit expression 'exp'.
|
||||
|
||||
@end table
|
||||
|
||||
They normally being used as an immediate source operand.
|
||||
@smallexample
|
||||
mov #llo(1), r10 ; == mov #1, r10
|
||||
mov #lhi(1), r10 ; == mov #0, r10
|
||||
@end smallexample
|
||||
|
||||
@node MSP430-Chars
|
||||
@subsection Special Characters
|
||||
|
||||
@cindex line comment character, MSP 430
|
||||
@cindex MSP 430 line comment character
|
||||
A semicolon (@samp{;}) appearing anywhere on a line starts a comment
|
||||
that extends to the end of that line.
|
||||
|
||||
If a @samp{#} appears as the first character of a line then the whole
|
||||
line is treated as a comment, but it can also be a logical line number
|
||||
directive (@pxref{Comments}) or a preprocessor control command
|
||||
(@pxref{Preprocessing}).
|
||||
|
||||
@cindex line separator, MSP 430
|
||||
@cindex statement separator, MSP 430
|
||||
@cindex MSP 430 line separator
|
||||
Multiple statements can appear on the same line provided that they are
|
||||
separated by the @samp{@{} character.
|
||||
|
||||
@cindex identifiers, MSP 430
|
||||
@cindex MSP 430 identifiers
|
||||
The character @samp{$} in jump instructions indicates current location and
|
||||
implemented only for TI syntax compatibility.
|
||||
|
||||
@node MSP430-Regs
|
||||
@subsection Register Names
|
||||
|
||||
@cindex MSP 430 register names
|
||||
@cindex register names, MSP 430
|
||||
General-purpose registers are represented by predefined symbols of the
|
||||
form @samp{r@var{N}} (for global registers), where @var{N} represents
|
||||
a number between @code{0} and @code{15}. The leading
|
||||
letters may be in either upper or lower case; for example, @samp{r13}
|
||||
and @samp{R7} are both valid register names.
|
||||
|
||||
@cindex special purpose registers, MSP 430
|
||||
Register names @samp{PC}, @samp{SP} and @samp{SR} cannot be used as register names
|
||||
and will be treated as variables. Use @samp{r0}, @samp{r1}, and @samp{r2} instead.
|
||||
|
||||
|
||||
@node MSP430-Ext
|
||||
@subsection Assembler Extensions
|
||||
@cindex MSP430 Assembler Extensions
|
||||
|
||||
@table @code
|
||||
|
||||
@item @@rN
|
||||
As destination operand being treated as @samp{0(rn)}
|
||||
|
||||
@item 0(rN)
|
||||
As source operand being treated as @samp{@@rn}
|
||||
|
||||
@item jCOND +N
|
||||
Skips next N bytes followed by jump instruction and equivalent to
|
||||
@samp{jCOND $+N+2}
|
||||
|
||||
@end table
|
||||
|
||||
Also, there are some instructions, which cannot be found in other assemblers.
|
||||
These are branch instructions, which has different opcodes upon jump distance.
|
||||
They all got PC relative addressing mode.
|
||||
|
||||
@table @code
|
||||
@item beq label
|
||||
A polymorph instruction which is @samp{jeq label} in case if jump distance
|
||||
within allowed range for cpu's jump instruction. If not, this unrolls into
|
||||
a sequence of
|
||||
@smallexample
|
||||
jne $+6
|
||||
br label
|
||||
@end smallexample
|
||||
|
||||
@item bne label
|
||||
A polymorph instruction which is @samp{jne label} or @samp{jeq +4; br label}
|
||||
|
||||
@item blt label
|
||||
A polymorph instruction which is @samp{jl label} or @samp{jge +4; br label}
|
||||
|
||||
@item bltn label
|
||||
A polymorph instruction which is @samp{jn label} or @samp{jn +2; jmp +4; br label}
|
||||
|
||||
@item bltu label
|
||||
A polymorph instruction which is @samp{jlo label} or @samp{jhs +2; br label}
|
||||
|
||||
@item bge label
|
||||
A polymorph instruction which is @samp{jge label} or @samp{jl +4; br label}
|
||||
|
||||
@item bgeu label
|
||||
A polymorph instruction which is @samp{jhs label} or @samp{jlo +4; br label}
|
||||
|
||||
@item bgt label
|
||||
A polymorph instruction which is @samp{jeq +2; jge label} or @samp{jeq +6; jl +4; br label}
|
||||
|
||||
@item bgtu label
|
||||
A polymorph instruction which is @samp{jeq +2; jhs label} or @samp{jeq +6; jlo +4; br label}
|
||||
|
||||
@item bleu label
|
||||
A polymorph instruction which is @samp{jeq label; jlo label} or @samp{jeq +2; jhs +4; br label}
|
||||
|
||||
@item ble label
|
||||
A polymorph instruction which is @samp{jeq label; jl label} or @samp{jeq +2; jge +4; br label}
|
||||
|
||||
@item jump label
|
||||
A polymorph instruction which is @samp{jmp label} or @samp{br label}
|
||||
@end table
|
||||
|
||||
|
||||
@node MSP430 Floating Point
|
||||
@section Floating Point
|
||||
|
||||
@cindex floating point, MSP 430 (@sc{ieee})
|
||||
@cindex MSP 430 floating point (@sc{ieee})
|
||||
The MSP 430 family uses @sc{ieee} 32-bit floating-point numbers.
|
||||
|
||||
@node MSP430 Directives
|
||||
@section MSP 430 Machine Directives
|
||||
|
||||
@cindex machine directives, MSP 430
|
||||
@cindex MSP 430 machine directives
|
||||
@table @code
|
||||
@cindex @code{file} directive, MSP 430
|
||||
@item .file
|
||||
This directive is ignored; it is accepted for compatibility with other
|
||||
MSP 430 assemblers.
|
||||
|
||||
@quotation
|
||||
@emph{Warning:} in other versions of the @sc{gnu} assembler, @code{.file} is
|
||||
used for the directive called @code{.app-file} in the MSP 430 support.
|
||||
@end quotation
|
||||
|
||||
@cindex @code{line} directive, MSP 430
|
||||
@item .line
|
||||
This directive is ignored; it is accepted for compatibility with other
|
||||
MSP 430 assemblers.
|
||||
|
||||
@cindex @code{arch} directive, MSP 430
|
||||
@item .arch
|
||||
Sets the target microcontroller in the same way as the @option{-mmcu}
|
||||
command line option.
|
||||
|
||||
@cindex @code{cpu} directive, MSP 430
|
||||
@item .cpu
|
||||
Sets the target architecture in the same way as the @option{-mcpu}
|
||||
command line option.
|
||||
|
||||
@cindex @code{profiler} directive, MSP 430
|
||||
@item .profiler
|
||||
This directive instructs assembler to add new profile entry to the object file.
|
||||
|
||||
@cindex @code{refsym} directive, MSP 430
|
||||
@item .refsym
|
||||
This directive instructs assembler to add an undefined reference to
|
||||
the symbol following the directive. The maximum symbol name length is
|
||||
1023 characters. No relocation is created for this symbol; it will
|
||||
exist purely for pulling in object files from archives. Note that
|
||||
this reloc is not sufficient to prevent garbage collection; use a
|
||||
KEEP() directive in the linker file to preserve such objects.
|
||||
|
||||
@end table
|
||||
|
||||
@node MSP430 Opcodes
|
||||
@section Opcodes
|
||||
|
||||
@cindex MSP 430 opcodes
|
||||
@cindex opcodes for MSP 430
|
||||
@code{@value{AS}} implements all the standard MSP 430 opcodes. No
|
||||
additional pseudo-instructions are needed on this family.
|
||||
|
||||
For information on the 430 machine instruction set, see @cite{MSP430
|
||||
User's Manual, document slau049d}, Texas Instrument, Inc.
|
||||
|
||||
@node MSP430 Profiling Capability
|
||||
@section Profiling Capability
|
||||
|
||||
@cindex MSP 430 profiling capability
|
||||
@cindex profiling capability for MSP 430
|
||||
It is a performance hit to use gcc's profiling approach for this tiny target.
|
||||
Even more -- jtag hardware facility does not perform any profiling functions.
|
||||
However we've got gdb's built-in simulator where we can do anything.
|
||||
|
||||
We define new section @samp{.profiler} which holds all profiling information.
|
||||
We define new pseudo operation @samp{.profiler} which will instruct assembler to
|
||||
add new profile entry to the object file. Profile should take place at the
|
||||
present address.
|
||||
|
||||
Pseudo operation format:
|
||||
|
||||
@samp{.profiler flags,function_to_profile [, cycle_corrector, extra]}
|
||||
|
||||
|
||||
where:
|
||||
|
||||
@table @code
|
||||
|
||||
@table @code
|
||||
|
||||
@samp{flags} is a combination of the following characters:
|
||||
|
||||
@item s
|
||||
function entry
|
||||
@item x
|
||||
function exit
|
||||
@item i
|
||||
function is in init section
|
||||
@item f
|
||||
function is in fini section
|
||||
@item l
|
||||
library call
|
||||
@item c
|
||||
libc standard call
|
||||
@item d
|
||||
stack value demand
|
||||
@item I
|
||||
interrupt service routine
|
||||
@item P
|
||||
prologue start
|
||||
@item p
|
||||
prologue end
|
||||
@item E
|
||||
epilogue start
|
||||
@item e
|
||||
epilogue end
|
||||
@item j
|
||||
long jump / sjlj unwind
|
||||
@item a
|
||||
an arbitrary code fragment
|
||||
@item t
|
||||
extra parameter saved (a constant value like frame size)
|
||||
@end table
|
||||
|
||||
@item function_to_profile
|
||||
a function address
|
||||
@item cycle_corrector
|
||||
a value which should be added to the cycle counter, zero if omitted.
|
||||
@item extra
|
||||
any extra parameter, zero if omitted.
|
||||
|
||||
@end table
|
||||
|
||||
For example:
|
||||
@smallexample
|
||||
.global fxx
|
||||
.type fxx,@@function
|
||||
fxx:
|
||||
.LFrameOffset_fxx=0x08
|
||||
.profiler "scdP", fxx ; function entry.
|
||||
; we also demand stack value to be saved
|
||||
push r11
|
||||
push r10
|
||||
push r9
|
||||
push r8
|
||||
.profiler "cdpt",fxx,0, .LFrameOffset_fxx ; check stack value at this point
|
||||
; (this is a prologue end)
|
||||
; note, that spare var filled with
|
||||
; the farme size
|
||||
mov r15,r8
|
||||
...
|
||||
.profiler cdE,fxx ; check stack
|
||||
pop r8
|
||||
pop r9
|
||||
pop r10
|
||||
pop r11
|
||||
.profiler xcde,fxx,3 ; exit adds 3 to the cycle counter
|
||||
ret ; cause 'ret' insn takes 3 cycles
|
||||
@end smallexample
|
||||
Loading…
Add table
Add a link
Reference in a new issue