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AVR documentation update
- To: gcc-patches at gcc dot gnu dot org
- Subject: AVR documentation update
- From: marekm at diament dot ists dot pwr dot wroc dot pl
- Date: Thu, 30 Nov 2000 16:37:48 +0100 (CET)
- CC: denisc at overta dot ru, marekm at linux dot org dot pl
- Reply-To: marekm at linux dot org dot pl
2000-11-30 Marek Michalkiewicz <marekm@linux.org.pl>
* install.texi (avr): Replace incomplete list of supported MCU
types with a link to the current one ...
* invoke.texi (AVR Options): ... here. Update -mmcu= to list
all supported MCU types. Document -minit-stack= default.
Document new options -mno-tablejump, -mtiny-stack.
* md.texi (AVR family): Fix typo in 'w' constraint letter
description. Document 'q'. Update 'O'.
diff -rc3p orig/egcs/gcc/install.texi egcs/gcc/install.texi
*** orig/egcs/gcc/install.texi Sun Oct 22 20:48:15 2000
--- egcs/gcc/install.texi Thu Nov 30 16:14:15 2000
*************** AMD Am29050 used in a system running a v
*** 992,1004 ****
@item avr
ATMEL AVR-family micro controllers. These are used in embedded
applications. There are no standard Unix configurations.
! Supports following MCU's:
! - AT90S23xx
! - ATtiny22
! - AT90S44xx
! - AT90S85xx
! - ATmega603/603L
! - ATmega103/103L
@item decstation-*
MIPS-based DECstations can support three different personalities:
--- 992,998 ----
@item avr
ATMEL AVR-family micro controllers. These are used in embedded
applications. There are no standard Unix configurations.
! See @xref{AVR Options} for the list of supported MCU types.
@item decstation-*
MIPS-based DECstations can support three different personalities:
diff -rc3p orig/egcs/gcc/invoke.texi egcs/gcc/invoke.texi
*** orig/egcs/gcc/invoke.texi Sat Nov 25 20:58:52 2000
--- egcs/gcc/invoke.texi Thu Nov 30 16:17:18 2000
*************** in the following sections.
*** 474,480 ****
@emph{AVR Options}
-mmcu=@var{mcu} -msize -minit-stack=@var{n} -mno-interrupts
! -mcall-prologues
@emph{MCore Options}
-mhardlit, -mno-hardlit -mdiv -mno-div -mrelax-immediates
--- 474,480 ----
@emph{AVR Options}
-mmcu=@var{mcu} -msize -minit-stack=@var{n} -mno-interrupts
! -mcall-prologues -mno-tablejump -mtiny-stack
@emph{MCore Options}
-mhardlit, -mno-hardlit -mdiv -mno-div -mrelax-immediates
*************** These options are defined for AVR implem
*** 7312,7325 ****
@table @code
@item -mmcu=@var{mcu}
! Specify ATMEL AVR mcu (at90s23xx,attiny22,at90s44xx,at90s85xx,atmega603,
! atmega103).
@item -msize
! Output instruction size's to the asm file
@item -minit-stack=@var{N}
! Specify the initial stack address
@item -mno-interrupts
Generated code is not compatible with hardware interrupts.
--- 7312,7343 ----
@table @code
@item -mmcu=@var{mcu}
! Specify ATMEL AVR instruction set or MCU type.
!
! Instruction set avr1 is for the minimal AVR core, not supported by the C
! compiler, only for assembler programs (MCU types: at90s1200, attiny10,
! attiny11, attiny12, attiny15, attiny28).
!
! Instruction set avr2 (default) is for the classic AVR core with up to
! 8K program memory space (MCU types: at90s2313, at90s2323, attiny22,
! at90s2333, at90s2343, at90s4414, at90s4433, at90s4434, at90s8515,
! at90c8534, at90s8535).
!
! Instruction set avr3 is for the classic AVR core with up to 128K program
! memory space (MCU types: atmega103, atmega603).
!
! Instruction set avr4 is for the enhanced AVR core with up to 8K program
! memory space (MCU types: atmega83, atmega85).
!
! Instruction set avr5 is for the enhanced AVR core with up to 128K program
! memory space (MCU types: atmega161, atmega163, atmega32, at94k).
@item -msize
! Output instruction sizes to the asm file.
@item -minit-stack=@var{N}
! Specify the initial stack address, which may be a symbol or numeric value,
! __stack is the default.
@item -mno-interrupts
Generated code is not compatible with hardware interrupts.
*************** Code size will be smaller.
*** 7328,7333 ****
--- 7346,7357 ----
@item -mcall-prologues
Functions prologues/epilogues expanded as call to appropriate
subroutines. Code size will be smaller.
+
+ @item -mno-tablejump
+ Do not generate tablejump insns which sometimes increase code size.
+
+ @item -mtiny-stack
+ Change only the low 8 bits of the stack pointer.
@end table
@node MCore Options
diff -rc3p orig/egcs/gcc/md.texi egcs/gcc/md.texi
*** orig/egcs/gcc/md.texi Wed Nov 22 18:32:09 2000
--- egcs/gcc/md.texi Thu Nov 30 16:16:42 2000
*************** Registers from r16 to r23
*** 1349,1355 ****
Registers from r16 to r31
@item w
! Register from r24 to r31. This registers can be used in @samp{addw} command
@item e
Pointer register (r26 - r31)
--- 1349,1355 ----
Registers from r16 to r31
@item w
! Registers from r24 to r31. These registers can be used in @samp{adiw} command
@item e
Pointer register (r26 - r31)
*************** Pointer register (r26 - r31)
*** 1357,1362 ****
--- 1357,1365 ----
@item b
Base pointer register (r28 - r31)
+ @item q
+ Stack pointer register (SPH:SPL)
+
@item t
Temporary register r0
*************** Constant that fits in 8 bits
*** 1388,1394 ****
Constant integer -1
@item O
! Constant integer 8
@item P
Constant integer 1
--- 1391,1397 ----
Constant integer -1
@item O
! Constant integer 8, 16, or 24
@item P
Constant integer 1