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"Unambiguous" is is in particular taking as reference the assembler, which also accepts certain insns - despite them allowing for varying operand size, and hence in principle being ambiguous - without any suffix. For example, from the very beginning of the life of x86-64 I had trouble understanding why a plain and simple RET had to be printed as RETQ. In case someone really used the 16-bit form, RETW disambiguates the two quite fine.
13 lines
286 B
D
13 lines
286 B
D
#source: pr19609-5.s
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#as: --64 -mrelax-relocations=yes
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#ld: -melf_x86_64 -Ttext=0x80000000 --no-relax
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#objdump: -dw
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.*: +file format .*
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Disassembly of section .text:
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[a-f0-9]+ <_start>:
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[ ]+[a-f0-9]+: ff 15 ([0-9a-f]{2} ){4} * call \*-?0x[a-f0-9]+\(%rip\) # [a-f0-9]+ <.*>
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