X-Git-Url: http://drtracing.org/?a=blobdiff_plain;ds=sidebyside;f=gas%2Fdoc%2Fc-avr.texi;h=86ecaf290d4e83b13c47f8b6f6a39eebbd7e5c39;hb=6f69abb0498286297936a178ba81c7e445aa4437;hp=8ef9aace4cc0ac70d70cd68d4f47686373a48d19;hpb=4d13caa0b9597137992f9c8b9e6d4f4a6391f7b3;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/doc/c-avr.texi b/gas/doc/c-avr.texi index 8ef9aace4c..86ecaf290d 100644 --- a/gas/doc/c-avr.texi +++ b/gas/doc/c-avr.texi @@ -1,4 +1,4 @@ -@c Copyright 2006-2013 Free Software Foundation, Inc. +@c Copyright (C) 2006-2019 Free Software Foundation, Inc. @c This is part of the GAS manual. @c For copying conditions, see the file as.texinfo. @@ -18,6 +18,7 @@ * AVR Options:: Options * AVR Syntax:: Syntax * AVR Opcodes:: Opcodes +* AVR Pseudo Instructions:: Pseudo Instructions @end menu @node AVR Options @@ -27,7 +28,7 @@ @table @code -@cindex @code{-mmcu=} command line option, AVR +@cindex @code{-mmcu=} command-line option, AVR @item -mmcu=@var{mcu} Specify ATMEL AVR instruction set or MCU type. @@ -45,7 +46,7 @@ space plus the MOVW instruction (MCU types: attiny13, attiny13a, attiny2313, attiny2313a, attiny24, attiny24a, attiny4313, attiny44, attiny44a, attiny84, attiny84a, attiny25, attiny45, attiny85, attiny261, attiny261a, attiny461, attiny461a, attiny861, attiny861a, attiny87, attiny43u, attiny48, attiny88, -at86rf401, ata6289). +attiny828, at86rf401, ata6289, ata5272). Instruction set avr3 is for the classic AVR core with up to 128K program memory space (MCU types: at43usb355, at76c711). @@ -54,77 +55,110 @@ Instruction set avr31 is for the classic AVR core with exactly 128K program memory space (MCU types: atmega103, at43usb320). Instruction set avr35 is for classic AVR core plus MOVW, CALL, and JMP -instructions (MCU types: attiny167, at90usb82, at90usb162, atmega8u2, -atmega16u2, atmega32u2). +instructions (MCU types: attiny167, attiny1634, at90usb82, at90usb162, +atmega8u2, atmega16u2, atmega32u2, ata5505). Instruction set avr4 is for the enhanced AVR core with up to 8K program -memory space (MCU types: atmega48, atmega48a, atmega48p, atmega8, atmega88, -atmega88a, atmega88p, atmega88pa, atmega8515, atmega8535, atmega8hva, at90pwm1, -at90pwm2, at90pwm2b, at90pwm3, at90pwm3b, at90pwm81). +memory space (MCU types: atmega48, atmega48a, atmega48pa, atmega48p, atmega8, +atmega8a, atmega88, atmega88a, atmega88p, atmega88pa, atmega8515, atmega8535, +atmega8hva, at90pwm1, at90pwm2, at90pwm2b, at90pwm3, at90pwm3b, at90pwm81, +ata6285, ata6286). Instruction set avr5 is for the enhanced AVR core with up to 128K program -memory space (MCU types: atmega16, atmega16a, atmega161, atmega162, -atmega163, atmega164a, atmega164p, atmega165, atmega165a, atmega165p, -atmega168, atmega168a, atmega168p, atmega169, atmega169a, atmega169p, -atmega169pa, atmega32, atmega323, atmega324a, atmega324p, atmega325, -atmega325a, atmega325p, atmega325pa, atmega3250, atmega3250a, -atmega3250p, atmega3250pa, atmega328, atmega328p, atmega329, -atmega329a, atmega329p, atmega329pa, atmega3290, atmega3290a, -atmega3290p, atmega3290pa, atmega406, atmega64, atmega640, atmega644, -atmega644a, atmega644p, atmega644pa, atmega645, atmega645a, -atmega645p, atmega6450, atmega6450a, atmega6450p, atmega649, -atmega649a, atmega649p, atmega6490, atmega6490a, atmega6490p, -atmega64rfr2, atmega644rfr2, atmega16hva, atmega16hva2, atmega16hvb, -atmega16hvbrevb, atmega32hvb, atmega32hvbrevb, atmega64hve, at90can32, -at90can64, at90pwm161, at90pwm216, at90pwm316, atmega32c1, atmega64c1, -atmega16m1, atmega32m1, atmega64m1, atmega16u4, atmega32u4, -atmega32u6, at90usb646, at90usb647, at94k, at90scr100). - -Instruction set avr51 is for the enhanced AVR core with exactly 128K program -memory space (MCU types: atmega128, atmega1280, atmega1281, atmega1284p, -atmega128rfa1, -atmega128rfr2, atmega1284rfr2, -at90can128, at90usb1286, at90usb1287, m3000). - -Instruction set avr6 is for the enhanced AVR core with a 3-byte PC (MCU types: -atmega2560, atmega2561, -atmega256rfr2, atmega2564rfr2). - -Instruction set avrxmega2 is for the XMEGA AVR core with 8K to 64K program -memory space and less than 64K data space (MCU types: atxmega16a4, atxmega16d4, -atxmega16x1, atxmega32a4, atxmega32d4, atxmega32x1). - -Instruction set avrxmega3 is for the XMEGA AVR core with 8K to 64K program -memory space and greater than 64K data space (MCU types: none). - -Instruction set avrxmega4 is for the XMEGA AVR core with up to 64K program -memory space and less than 64K data space (MCU types: atxmega64a3, atxmega64d3). - -Instruction set avrxmega5 is for the XMEGA AVR core with up to 64K program -memory space and greater than 64K data space (MCU types: atxmega64a1, -atxmega64a1u). - -Instruction set avrxmega6 is for the XMEGA AVR core with up to 256K program -memory space and less than 64K data space (MCU types: atxmega128a3, -atxmega128d3, atxmega192a3, atxmega128b1, atxmega192d3, atxmega256a3, -atxmega256a3b, atxmega256a3bu, atxmega192d3). - -Instruction set avrxmega7 is for the XMEGA AVR core with up to 256K program -memory space and greater than 64K data space (MCU types: atxmega128a1, -atxmega128a1u). - -@cindex @code{-mall-opcodes} command line option, AVR +memory space (MCU types: at90pwm161, atmega16, atmega16a, atmega161, atmega162, +atmega163, atmega164a, atmega164p, atmega164pa, atmega165, atmega165a, +atmega165p, atmega165pa, atmega168, atmega168a, atmega168p, atmega168pa, +atmega169, atmega169a, atmega169p, atmega169pa, atmega32, atmega323, atmega324a, +atmega324p, atmega324pa, atmega325, atmega325a, atmega32, atmega32a, atmega323, +atmega324a, atmega324p, atmega324pa, atmega325, atmega325a, atmega325p, +atmega325p, atmega325pa, atmega3250, atmega3250a, atmega3250p, atmega3250pa, +atmega328, atmega328p, atmega329, atmega329a, atmega329p, atmega329pa, +atmega3290a, atmega3290p, atmega3290pa, atmega406, atmega64, atmega64a, +atmega64rfr2, atmega644rfr2, atmega640, atmega644, atmega644a, atmega644p, +atmega644pa, atmega645, atmega645a, atmega645p, atmega6450, atmega6450a, +atmega6450p, atmega649, atmega649a, atmega649p, atmega6490, atmega6490a, +atmega6490p, atmega16hva, atmega16hva2, atmega16hvb, atmega16hvbrevb, +atmega32hvb, atmega32hvbrevb, atmega64hve, at90can32, at90can64, at90pwm161, +at90pwm216, at90pwm316, atmega32c1, atmega64c1, atmega16m1, atmega32m1, +atmega64m1, atmega16u4, atmega32u4, atmega32u6, at90usb646, at90usb647, at94k, +at90scr100, ata5790, ata5795). + +Instruction set avr51 is for the enhanced AVR core with exactly 128K +program memory space (MCU types: atmega128, atmega128a, atmega1280, +atmega1281, atmega1284, atmega1284p, atmega128rfa1, atmega128rfr2, +atmega1284rfr2, at90can128, at90usb1286, at90usb1287, m3000). + +Instruction set avr6 is for the enhanced AVR core with a 3-byte PC +(MCU types: atmega2560, atmega2561, atmega256rfr2, atmega2564rfr2). + +Instruction set avrxmega2 is for the XMEGA AVR core with 8K to 64K +program memory space and less than 64K data space (MCU types: +atxmega16a4, atxmega16a4u, atxmega16c4, atxmega16d4, atxmega16x1, +atxmega32a4, atxmega32a4u, atxmega32c4, atxmega32d4, atxmega16e5, +atxmega8e5, atxmega32e5, atxmega32x1). + +Instruction set avrxmega3 is for the XMEGA AVR core with up to 64K +of combined program memory and RAM, and with program memory +visible in the RAM address space (MCU types: +attiny212, attiny214, attiny412, attiny414, attiny416, attiny417, +attiny814, attiny816, attiny817, attiny1614, attiny1616, attiny1617, +attiny3214, attiny3216, attiny3217). + +Instruction set avrxmega4 is for the XMEGA AVR core with up to 64K +program memory space and less than 64K data space (MCU types: +atxmega64a3, atxmega64a3u, atxmega64a4u, atxmega64b1, atxmega64b3, +atxmega64c3, atxmega64d3, atxmega64d4). + +Instruction set avrxmega5 is for the XMEGA AVR core with up to 64K +program memory space and greater than 64K data space (MCU types: +atxmega64a1, atxmega64a1u). + +Instruction set avrxmega6 is for the XMEGA AVR core with larger than +64K program memory space and less than 64K data space (MCU types: +atxmega128a3, atxmega128a3u, atxmega128c3, atxmega128d3, atxmega128d4, +atxmega192a3, atxmega192a3u, atxmega128b1, atxmega128b3, atxmega192c3, +atxmega192d3, atxmega256a3, atxmega256a3u, atxmega256a3b, +atxmega256a3bu, atxmega256c3, atxmega256d3, atxmega384c3, +atxmega256d3). + +Instruction set avrxmega7 is for the XMEGA AVR core with larger than +64K program memory space and greater than 64K data space (MCU types: +atxmega128a1, atxmega128a1u, atxmega128a4u). + +Instruction set avrtiny is for the ATtiny4/5/9/10/20/40 +microcontrollers. + +@cindex @code{-mall-opcodes} command-line option, AVR @item -mall-opcodes Accept all AVR opcodes, even if not supported by @code{-mmcu}. -@cindex @code{-mno-skip-bug} command line option, AVR +@cindex @code{-mno-skip-bug} command-line option, AVR @item -mno-skip-bug This option disable warnings for skipping two-word instructions. -@cindex @code{-mno-wrap} command line option, AVR +@cindex @code{-mno-wrap} command-line option, AVR @item -mno-wrap This option reject @code{rjmp/rcall} instructions with 8K wrap-around. +@cindex @code{-mrmw} command-line option, AVR +@item -mrmw +Accept Read-Modify-Write (@code{XCH,LAC,LAS,LAT}) instructions. + +@cindex @code{-mlink-relax} command-line option, AVR +@item -mlink-relax +Enable support for link-time relaxation. This is now on by default +and this flag no longer has any effect. + +@cindex @code{-mno-link-relax} command-line option, AVR +@item -mno-link-relax +Disable support for link-time relaxation. The assembler will resolve +relocations when it can, and may be able to better compress some debug +information. + +@cindex @code{-mgcc-isr} command-line option, AVR +@item -mgcc-isr +Enable the @code{__gcc_isr} pseudo instruction. + @end table @@ -415,3 +449,60 @@ The following table summarizes the AVR opcodes, and their arguments. 1001010100011001 eicall 1001010000011001 eijmp @end smallexample + +@node AVR Pseudo Instructions +@section Pseudo Instructions + +The only available pseudo-instruction @code{__gcc_isr} can be activated by +option @option{-mgcc-isr}. + +@table @code + +@item __gcc_isr 1 +Emit code chunk to be used in avr-gcc ISR prologue. +It will expand to at most six 1-word instructions, all optional: +push of @code{tmp_reg}, push of @code{SREG}, +push and clear of @code{zero_reg}, push of @var{Reg}. + +@item __gcc_isr 2 +Emit code chunk to be used in an avr-gcc ISR epilogue. +It will expand to at most five 1-word instructions, all optional: +pop of @var{Reg}, pop of @code{zero_reg}, +pop of @code{SREG}, pop of @code{tmp_reg}. + +@item __gcc_isr 0, @var{Reg} +Finish avr-gcc ISR function. Scan code since the last prologue +for usage of: @code{SREG}, @code{tmp_reg}, @code{zero_reg}. +Prologue chunk and epilogue chunks will be replaced by appropriate code +to save / restore @code{SREG}, @code{tmp_reg}, @code{zero_reg} and @var{Reg}. + +@end table + +Example input: + +@example +__vector1: + __gcc_isr 1 + lds r24, var + inc r24 + sts var, r24 + __gcc_isr 2 + reti + __gcc_isr 0, r24 +@end example + +Example output: + +@example +00000000 <__vector1>: + 0: 8f 93 push r24 + 2: 8f b7 in r24, 0x3f + 4: 8f 93 push r24 + 6: 80 91 60 00 lds r24, 0x0060 ; 0x800060 + a: 83 95 inc r24 + c: 80 93 60 00 sts 0x0060, r24 ; 0x800060 + 10: 8f 91 pop r24 + 12: 8f bf out 0x3f, r24 + 14: 8f 91 pop r24 + 16: 18 95 reti +@end example