chirping78 commented on issue #16235:
URL: https://github.com/apache/nuttx/issues/16235#issuecomment-2814404279
As a comparison, here is the disassemble output of xt-clang/xt-gdb,
toolchain from cadence, used in a product embedded a hifi4 dsp (which is also
LX7 arch based):
```
(xt-gdb) disassemble /r cmd_uname
Dump of assembler code for function cmd_uname:
0x2cd0f1d4 <+0>: 36 21 03 entry a1, 0x190
0x2cd0f1d7 <+3>: 2e c1 00 0f 19 e0 { s32i a2, a1, 48; movi
a15, 0 }
0x2cd0f1dd <+9>: 2e 4d 03 15 07 fd { l32r a2, 0x2cceb714
<_stext+5756> (0x2ce95ac0); mov.n a5, a3 }
0x2cd0f1e3 <+15>: 6e 50 00 18 07 e0 { l32r a6, 0x2cceb724
<_stext+5772> (0x2ce959d0 <__switchjump_table_xp_temp_9_0>); movi a8, 0 }
0x2cd0f1e9 <+21>: fe d1 6c 07 19 e0 { s32i a15, a1, 52; movi
a7, 108 }
0x2cd0f1ef <+27>: ae 95 04 0b 26 fd { mov.n a10, a5; mov.n a11,
a4 }
0x2cd0f1f5 <+33>: 3e 98 02 0c 26 fd { mov.n a3, a8; mov.n a12,
a2 }
0x2cd0f1fb <+39>: 65 cc f4 call8 0x2cd03ec0 <getopt>
...
```
You can see from the disassemble that:
- the instructions between curly brace is the so-called FLIX instruction
mentioned above
- after set some registers, `cmd_uname` calls `getopt` first, which match
with the source code
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