-@c Copyright 2002, 2004 Free Software Foundation, Inc.
+@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
@cindex options for MSP430 (none)
@table @code
-@item -m
-select the mpu arch. Currently has no effect.
-@item -mP
+@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
+@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
@table @code
-@item llo(exp)
+@item llo(exp)
Extracts least significant word from 32-bit expression 'exp'.
@item lhi(exp)
@item hlo(exp)
Extracts 3rd word from 64-bit expression 'exp'.
-@item hhi(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 #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
-@samp{;} is the 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{$} in jump instructions indicates current location and
+The character @samp{$} in jump instructions indicates current location and
implemented only for TI syntax compatibility.
@node MSP430-Regs
This directive is ignored; it is accepted for compatibility with other
MSP 430 assemblers.
-@cindex @code{sect} directive, MSP 430
+@cindex @code{arch} directive, MSP 430
@item .arch
-Currently this directive is ignored; it is accepted for compatibility with other
-MSP 430 assemblers.
+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
@samp{flags} is a combination of the following characters:
-@item s
+@item s
function entry
-@item x
+@item x
function exit
-@item i
+@item i
function is in init section
-@item f
+@item f
function is in fini section
-@item l
+@item l
library call
-@item c
+@item c
libc standard call
-@item d
+@item d
stack value demand
-@item I
+@item I
interrupt service routine
-@item P
+@item P
prologue start
-@item p
+@item p
prologue end
-@item E
+@item E
epilogue start
-@item e
+@item e
epilogue end
-@item j
+@item j
long jump / sjlj unwind
-@item a
+@item a
an arbitrary code fragment
@item t
extra parameter saved (a constant value like frame size)
@end table
-@item function_to_profile
+@item function_to_profile
a function address
-@item cycle_corrector
+@item cycle_corrector
a value which should be added to the cycle counter, zero if omitted.
-@item extra
+@item extra
any extra parameter, zero if omitted.
@end table
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
+ ; note, that spare var filled with
; the farme size
mov r15,r8
...
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