https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64681
David <gccbugzilla at limegreensocks dot com> changed:
What |Removed |Added
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CC| |gccbugzilla@limegreensocks.
| |com
--- Comment #4 from David <gccbugzilla at limegreensocks dot com> ---
Until very recently, *none* of the modifiers were documented. In the current
docs
(https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#i386Operandmodifiers),
only the i386 modifiers are doc'ed.
That said, you can always check out the gcc source. For example:
The comments above output_asm_insn in
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/final.c?view=co&content-type=text%2Fplain
describe some global modifiers.
For i386-specific modifiers, look above ix86_print_operand in
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/i386/i386.c?view=co&content-type=text%2Fplain
For arm, look above arm_print_operand in
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/arm/arm.c?view=co&content-type=text%2Fplain
Presumably there are similar sections for other configs.
