Select the target architecture. Valid values for name are the same as for the -march command-line option.
.arch clears any previously selected architecture
Add or remove an architecture extension to the target architecture. Valid values for name are the same as those accepted as architectural extensions by the -mcpu command-line option.
.arch_extension may be used multiple times to add or remove extensions
incrementally to the architecture being compiled for.
This directive switches to the
Set the target processor. Valid values for name are the same as those accepted by the -mcpu= command-line option.
.dword directive produces 64 bit values.
.even directive aligns the output on the next even byte
.float16 value [,...,value_n]
Place the half precision floating point representation of one or more floating-point values into the current section. The format used to encode the floating point values is always the IEEE 754-2008 half precision floating point format.
Inserts the expressions into the output as if they were instructions, rather than data.
This directive causes the current contents of the literal pool to be
dumped into the current section (which is assumed to be the .text
section) at the current location (aligned to a word boundary).
GAS maintains a separate literal pool for each section and each
.ltorg directive will only affect the literal
pool of the current section and sub-section. At the end of assembly
all remaining, un-empty literal pools will automatically be dumped.
Note - older versions of GAS would dump the current literal pool any time a section change occurred. This is no longer done, since it prevents accurate control of the placement of literal pools.
This is a synonym for .ltorg.
name .req register name
This creates an alias for register name called name. For example:
foo .req w0
ip0, ip1, lr and fp are automatically defined to alias to X16, X17, X30 and X29 respectively.
Emits a TLSDESC_ADD reloc on the next instruction.
Emits a TLSDESC_CALL reloc on the next instruction.
Emits a TLSDESC_LDR reloc on the next instruction.
This undefines a register alias which was previously defined using the
req directive. For example:
foo .req w0 .unreq foo
An error occurs if the name is undefined. Note - this pseudo op can be used to delete builtin in register name aliases (eg ’w0’). This should only be done if it is really necessary.
This directive marks symbol referencing a function that may follow a variant procedure call standard with different register usage convention from the base procedure call standard.
.xword directive produces 64 bit values. This is the same
.cfi_b_key_frame directive inserts a ’B’ character into the CIE
corresponding to the current frame’s FDE, meaning that its return address has
been signed with the B-key. If two frames are signed with differing keys then
they will not share the same CIE. This information is intended to be used by
the stack unwinder in order to properly authenticate return addresses.