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d17e797f5c
Correct issues with INSN2_ALIAS annotation for branch instructions: - regular MIPS BEQZ/L and BNEZ/L assembly instructions are idioms for BEQ/L and BNE/L respectively with the `rs' operand equal to $0, - microMIPS 32-bit BEQZ and BNEZ assembly instructions are idioms for BEQ and BNE respectively with the `rt' operand equal to $0, - regular MIPS BAL assembly instruction is an idiom for architecture levels of up to the MIPSr5 ISA and a machine instruction on its own from the MIPSr6 ISA up. Add missing annotation to BEQZ/L and BNEZ/L accordingly then and add a new entry for BAL for the MIPSr6 ISA, correcting a disassembly bug: $ mips-linux-gnu-objdump -m mips:isa64r6 -M no-aliases -d bal.o bal.o: file format elf32-tradlittlemips Disassembly of section .text: 00000000 <foo>: 0: 04110000 0x4110000 ... $ Add test cases accordingly. Parts for regular MIPS BEQZ/L and BNEZ/L instructions from Sagar Patel. 2022-03-06 Maciej W. Rozycki <macro@orcam.me.uk> binutils/ * testsuite/binutils-all/mips/mips1-branch-alias.d: New test. * testsuite/binutils-all/mips/mips1-branch-noalias.d: New test. * testsuite/binutils-all/mips/mips2-branch-alias.d: New test. * testsuite/binutils-all/mips/mips2-branch-noalias.d: New test. * testsuite/binutils-all/mips/mips32r6-branch-alias.d: New test. * testsuite/binutils-all/mips/mips32r6-branch-noalias.d: New test. * testsuite/binutils-all/mips/micromips-branch-alias.d: New test. * testsuite/binutils-all/mips/micromips-branch-noalias.d: New test. * testsuite/binutils-all/mips/mips-branch-alias.s: New test source. * testsuite/binutils-all/mips/micromips-branch-alias.s: New test source. * testsuite/binutils-all/mips/mips.exp: Run the new tests. 2022-03-06 Sagar Patel <sagarmp@cs.unc.edu> Maciej W. Rozycki <macro@orcam.me.uk> opcodes/ * mips-opc.c (mips_builtin_opcodes): Fix INSN2_ALIAS annotation for "bal", "beqz", "beqzl", "bnez" and "bnezl" instructions. * micromips-opc.c (micromips_opcodes): Likewise for "beqz" and "bnez" instructions.
18 lines
612 B
Makefile
18 lines
612 B
Makefile
#PROG: objcopy
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#objdump: -d --prefix-addresses --show-raw-insn
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#name: microMIPS branch instruction alias disassembly
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#source: micromips-branch-alias.s
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.*: +file format .*mips.*
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Disassembly of section \.text:
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[0-9a-f]+ <[^>]*> 9400 0000 b [0-9a-f]+ <[^>]*>
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[0-9a-f]+ <[^>]*> 4040 0000 b [0-9a-f]+ <[^>]*>
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[0-9a-f]+ <[^>]*> 40e0 0000 bc [0-9a-f]+ <[^>]*>
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[0-9a-f]+ <[^>]*> 9401 0000 beqz at,[0-9a-f]+ <[^>]*>
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[0-9a-f]+ <[^>]*> b401 0000 bnez at,[0-9a-f]+ <[^>]*>
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[0-9a-f]+ <[^>]*> 4060 0000 bal [0-9a-f]+ <[^>]*>
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[0-9a-f]+ <[^>]*> 4260 0000 bals [0-9a-f]+ <[^>]*>
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[0-9a-f]+ <[^>]*> 0000 0000 nop
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\.\.\.
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