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AVR: extend.texi - Use @defbuiltin to document built-ins.

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gcc/
	* doc/extend.texi (AVR Built-in Functions): Use @defbuiltin
	instead of @table.
This commit is contained in:
Georg-Johann Lay 2024-02-20 13:46:30 +01:00
parent 97f34ad10d
commit 39ff13375d
1 changed files with 20 additions and 16 deletions
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36
gcc/doc/extend.texi
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@ -16782,37 +16782,41 @@ or if not a specific built-in is implemented or not. For example, if
@code{__builtin_avr_nop} is available the macro
@code{__BUILTIN_AVR_NOP} is defined to @code{1} and undefined otherwise.
@table @code
@defbuiltin{void __builtin_avr_nop (void)}
@defbuiltinx{void __builtin_avr_nop (void)}
@defbuiltinx{void __builtin_avr_sei (void)}
@defbuiltinx{void __builtin_avr_cli (void)}
@defbuiltinx{void __builtin_avr_sleep (void)}
@defbuiltinx{void __builtin_avr_wdr (void)}
@defbuiltinx{{unsigned char} __builtin_avr_swap (unsigned char)}
@defbuiltinx{{unsigned int} __builtin_avr_fmul (unsigned char, unsigned char)}
@defbuiltinx{int __builtin_avr_fmuls (char, char)}
@defbuiltinx{int __builtin_avr_fmulsu (char, unsigned char)}
@item void __builtin_avr_nop (void)
@itemx void __builtin_avr_sei (void)
@itemx void __builtin_avr_cli (void)
@itemx void __builtin_avr_sleep (void)
@itemx void __builtin_avr_wdr (void)
@itemx unsigned char __builtin_avr_swap (unsigned char)
@itemx unsigned int __builtin_avr_fmul (unsigned char, unsigned char)
@itemx int __builtin_avr_fmuls (char, char)
@itemx int __builtin_avr_fmulsu (char, unsigned char)
These built-in functions map to the respective machine
instruction, i.e.@: @code{nop}, @code{sei}, @code{cli}, @code{sleep},
@code{wdr}, @code{swap}, @code{fmul}, @code{fmuls}
resp. @code{fmulsu}. The three @code{fmul*} built-ins are implemented
as library call if no hardware multiplier is available.
@item void __builtin_avr_delay_cycles (unsigned long ticks)
@enddefbuiltin
@defbuiltin{void __builtin_avr_delay_cycles (unsigned long @var{ticks})}
Delay execution for @var{ticks} cycles. Note that this
built-in does not take into account the effect of interrupts that
might increase delay time. @var{ticks} must be a compile-time
integer constant; delays with a variable number of cycles are not supported.
@enddefbuiltin
@item char __builtin_avr_flash_segment (const __memx void*)
@defbuiltin{char __builtin_avr_flash_segment (const __memx void*)}
This built-in takes a byte address to the 24-bit
@ref{AVR Named Address Spaces,address space} @code{__memx} and returns
the number of the flash segment (the 64 KiB chunk) where the address
points to. Counting starts at @code{0}.
If the address does not point to flash memory, return @code{-1}.
@enddefbuiltin
@item uint8_t __builtin_avr_insert_bits (uint32_t map, uint8_t bits, uint8_t val)
@defbuiltin{uint8_t __builtin_avr_insert_bits (uint32_t @var{map}, uint8_t @var{bits}, uint8_t @var{val})}
Insert bits from @var{bits} into @var{val} and return the resulting
value. The nibbles of @var{map} determine how the insertion is
performed: Let @var{X} be the @var{n}-th nibble of @var{map}
@ -16856,12 +16860,12 @@ __builtin_avr_insert_bits (0xffff3210, bits, val);
// reverse the bit order of bits
__builtin_avr_insert_bits (0x01234567, bits, 0);
@end smallexample
@enddefbuiltin
@item void __builtin_avr_nops (unsigned count)
@defbuiltin{void __builtin_avr_nops (unsigned @var{count})}
Insert @var{count} @code{NOP} instructions.
The number of instructions must be a compile-time integer constant.
@end table
@enddefbuiltin
@noindent
There are many more AVR-specific built-in functions that are used to