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Add support for a __gcc_isr pseudo isntruction to the AVR assembler.

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PR gas/21683
include * opcode/avr.h (AVR_INSN): Add one for __gcc_isr.

gas * doc/c-avr.texi (AVR Options) <-mgcc-isr>: Document it.
    (AVR Pseudo Instructions): New node.
    * config/tc-avr.h (md_pre_output_hook): Define to avr_pre_output_hook.
    (md_undefined_symbol): Define to avr_undefined_symbol.
    (avr_pre_output_hook, avr_undefined_symbol): New protos.
    * config/tc-avr.c (struc-symbol.h): Include it.
    (ISR_CHUNK_Done, ISR_CHUNK_Prologue, ISR_CHUNK_Epilogue): New enums.
    (avr_isr, avr_gccisr_opcode)
    (avr_no_sreg_hash, avr_no_sreg): New static variables.
    (avr_opt_s) <have_gccisr>: Add field.
    (avr_opt): Add initializer for have_gccisr.
    (enum options) <OPTION_HAVE_GCCISR>: Add enum.
    (md_longopts) <"mgcc-isr">: Add entry.
    (md_show_usage): Document -mgcc-isr.
    (md_parse_option) [OPTION_HAVE_GCCISR]: Handle it.
    (md_undefined_symbol): Remove.
    (avr_undefined_symbol, avr_pre_output_hook): New fuctions.
    (md_begin) <avr_no_sreg_hash, avr_gccisr_opcode>: Initialize them.
    (avr_operand) <pregno>: Add argument and set *pregno if function
    is called for a register constraint.
    [N]: Handle constraint.
    (avr_operands) <avr_operand>: Pass 5th parameter to calls.
    [avr_opt.have_gccisr]: Call avr_update_gccisr.  Call
    avr_gccisr_operands instead of avr_operands.
    (avr_update_gccisr, avr_emit_insn, avr_patch_gccisr_frag)
    (avr_gccisr_operands, avr_check_gccisr_done): New static functions.
    * testsuite/gas/avr/gccisr-01.d: New test.
    * testsuite/gas/avr/gccisr-01.s: New test.
    * testsuite/gas/avr/gccisr-02.d: New test.
    * testsuite/gas/avr/gccisr-02.s: New test.
    * testsuite/gas/avr/gccisr-03.d: New test.
    * testsuite/gas/avr/gccisr-03.s: New test.
This commit is contained in:
Georg-Johann Lay
2017-06-30 16:37:39 +01:00
committed by Nick Clifton
parent 33f466961c
commit 32f76c6773
12 changed files with 1060 additions and 7 deletions

5
include/opcode/avr.h

@ -110,6 +110,7 @@
z - Z pointer register (for [e]lpm Rd,Z[+])
M - immediate value from 0 to 255
n - immediate value from 0 to 255 ( n = ~M ). Relocation impossible
N - immediate value from 0 to 255. Relocation impossible
s - immediate value from 0 to 7
P - Port address value from 0 to 63. (in, out)
p - Port address value from 0 to 31. (cbi, sbi, sbic, sbis)
@ -306,3 +307,7 @@ AVR_INSN (eijmp, "", "1001010000011001", 1, AVR_ISA_EIND, 0x9419)
/* DES instruction for encryption and decryption. */
AVR_INSN (des, "E", "10010100EEEE1011", 1, AVR_ISA_DES, 0x940B)
/* Operands are evaluated by hand and won't pop new fux-ups.
The pseudo-insn is hidden behind NOP so that avr-dis.c don't see it. */
AVR_INSN (__gcc_isr, "", "0000000000000000", 1, AVR_ISA_1200, 0x0)