6.58.4 ARC Built-in Functions

— Built-in Function: int __builtin_arc_aligned (void *val, int alignval)

Return 1 if val is known to have the byte alignment given by alignval, otherwise return 0. Note that this is different from

__alignof__(*(char *)val) >= alignval

because __alignof__ sees only the type of the dereference, whereas __builtin_arc_align uses alignment information from the pointer as well as from the pointed-to type. The information available will depend on optimization level.

— Built-in Function: void __builtin_arc_brk (void)

Generates

brk

— Built-in Function: unsigned int __builtin_arc_core_read (unsigned int regno)

The operand is the number of a register to be read. Generates:

mov  dest, rregno

where the value in dest will be the result returned from the built-in.

— Built-in Function: void __builtin_arc_core_write (unsigned int regno, unsigned int val)

The first operand is the number of a register to be written, the second operand is a compile time constant to write into that register. Generates:

mov  rregno, val

— Built-in Function: int __builtin_arc_divaw (int a, int b)

Only available if either -mcpu=ARC700 or -meA is set. Generates:

divaw  dest, a, b

where the value in dest will be the result returned from the built-in.

— Built-in Function: void __builtin_arc_flag (unsigned int a)

Generates

flag  a

— Built-in Function: unsigned int __builtin_arc_lr (unsigned int auxr)

The operand, auxv, is the address of an auxiliary register and must be a compile time constant. Generates:

lr  dest, [auxr]

Where the value in dest will be the result returned from the built-in.

— Built-in Function: void __builtin_arc_mul64 (int a, int b)

Only available with -mmul64. Generates:

mul64  a, b

— Built-in Function: void __builtin_arc_mulu64 (unsigned int a, unsigned int b)

Only available with -mmul64. Generates:

mulu64  a, b

— Built-in Function: void __builtin_arc_nop (void)

Generates:

nop

— Built-in Function: int __builtin_arc_norm (int src)

Only valid if the ‘norm’ instruction is available through the -mnorm option or by default with -mcpu=ARC700. Generates:

norm  dest, src

Where the value in dest will be the result returned from the built-in.

— Built-in Function: short int __builtin_arc_normw (short int src)

Only valid if the ‘normw’ instruction is available through the -mnorm option or by default with -mcpu=ARC700. Generates:

normw  dest, src

Where the value in dest will be the result returned from the built-in.

— Built-in Function: void __builtin_arc_rtie (void)

Generates:

rtie

— Built-in Function: void __builtin_arc_sleep (int a

Generates:

sleep  a

— Built-in Function: void __builtin_arc_sr (unsigned int auxr, unsigned int val)

The first argument, auxv, is the address of an auxiliary register, the second argument, val, is a compile time constant to be written to the register. Generates:

sr  auxr, [val]

— Built-in Function: int __builtin_arc_swap (int src)

Only valid with -mswap. Generates:

swap  dest, src

Where the value in dest will be the result returned from the built-in.

— Built-in Function: void __builtin_arc_swi (void)

Generates:

swi

— Built-in Function: void __builtin_arc_sync (void)

Only available with -mcpu=ARC700. Generates:

sync

— Built-in Function: void __builtin_arc_trap_s (unsigned int c)

Only available with -mcpu=ARC700. Generates:

trap_s  c

— Built-in Function: void __builtin_arc_unimp_s (void)

Only available with -mcpu=ARC700. Generates:

unimp_s

__builtin_arc_brk()
__builtin_arc_core_read()
__builtin_arc_core_write()
__builtin_arc_flag()
__builtin_arc_lr()
__builtin_arc_sleep()
__builtin_arc_sr()
__builtin_arc_swi()