6.57.4 ARC SIMD Built-in Functions

SIMD builtins provided by the compiler can be used to generate the vector instructions. This section describes the available builtins and their usage in programs. With the -msimd option, the compiler provides 128-bit vector types, which can be specified using the vector_size attribute. The header file arc-simd.h can be included to use the following predefined types:

typedef int __v4si   __attribute__((vector_size(16)));
typedef short __v8hi __attribute__((vector_size(16)));

These types can be used to define 128-bit variables. The built-in functions listed in the following section can be used on these variables to generate the vector operations.

For all builtins, __builtin_arc_someinsn, the header file arc-simd.h also provides equivalent macros called _someinsn that can be used for programming ease and improved readability. The following macros for DMA control are also provided:

#define _setup_dma_in_channel_reg _vdiwr
#define _setup_dma_out_channel_reg _vdowr

The following is a complete list of all the SIMD built-ins provided for ARC, grouped by calling signature.

The following take two __v8hi arguments and return a __v8hi result:

__v8hi __builtin_arc_vaddaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vaddw (__v8hi, __v8hi)
__v8hi __builtin_arc_vand (__v8hi, __v8hi)
__v8hi __builtin_arc_vandaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vavb (__v8hi, __v8hi)
__v8hi __builtin_arc_vavrb (__v8hi, __v8hi)
__v8hi __builtin_arc_vbic (__v8hi, __v8hi)
__v8hi __builtin_arc_vbicaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vdifaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vdifw (__v8hi, __v8hi)
__v8hi __builtin_arc_veqw (__v8hi, __v8hi)
__v8hi __builtin_arc_vh264f (__v8hi, __v8hi)
__v8hi __builtin_arc_vh264ft (__v8hi, __v8hi)
__v8hi __builtin_arc_vh264fw (__v8hi, __v8hi)
__v8hi __builtin_arc_vlew (__v8hi, __v8hi)
__v8hi __builtin_arc_vltw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmaxaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmaxw (__v8hi, __v8hi)
__v8hi __builtin_arc_vminaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vminw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr1aw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr1w (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr2aw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr2w (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr3aw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr3w (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr4aw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr4w (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr5aw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr5w (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr6aw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr6w (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr7aw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmr7w (__v8hi, __v8hi)
__v8hi __builtin_arc_vmrb (__v8hi, __v8hi)
__v8hi __builtin_arc_vmulaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmulfaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmulfw (__v8hi, __v8hi)
__v8hi __builtin_arc_vmulw (__v8hi, __v8hi)
__v8hi __builtin_arc_vnew (__v8hi, __v8hi)
__v8hi __builtin_arc_vor (__v8hi, __v8hi)
__v8hi __builtin_arc_vsubaw (__v8hi, __v8hi)
__v8hi __builtin_arc_vsubw (__v8hi, __v8hi)
__v8hi __builtin_arc_vsummw (__v8hi, __v8hi)
__v8hi __builtin_arc_vvc1f (__v8hi, __v8hi)
__v8hi __builtin_arc_vvc1ft (__v8hi, __v8hi)
__v8hi __builtin_arc_vxor (__v8hi, __v8hi)
__v8hi __builtin_arc_vxoraw (__v8hi, __v8hi)

The following take one __v8hi and one int argument and return a __v8hi result:

__v8hi __builtin_arc_vbaddw (__v8hi, int)
__v8hi __builtin_arc_vbmaxw (__v8hi, int)
__v8hi __builtin_arc_vbminw (__v8hi, int)
__v8hi __builtin_arc_vbmulaw (__v8hi, int)
__v8hi __builtin_arc_vbmulfw (__v8hi, int)
__v8hi __builtin_arc_vbmulw (__v8hi, int)
__v8hi __builtin_arc_vbrsubw (__v8hi, int)
__v8hi __builtin_arc_vbsubw (__v8hi, int)

The following take one __v8hi argument and one int argument which must be a 3-bit compile time constant indicating a register number I0-I7. They return a __v8hi result.

__v8hi __builtin_arc_vasrw (__v8hi, const int)
__v8hi __builtin_arc_vsr8 (__v8hi, const int)
__v8hi __builtin_arc_vsr8aw (__v8hi, const int)

The following take one __v8hi argument and one int argument which must be a 6-bit compile time constant. They return a __v8hi result.

__v8hi __builtin_arc_vasrpwbi (__v8hi, const int)
__v8hi __builtin_arc_vasrrpwbi (__v8hi, const int)
__v8hi __builtin_arc_vasrrwi (__v8hi, const int)
__v8hi __builtin_arc_vasrsrwi (__v8hi, const int)
__v8hi __builtin_arc_vasrwi (__v8hi, const int)
__v8hi __builtin_arc_vsr8awi (__v8hi, const int)
__v8hi __builtin_arc_vsr8i (__v8hi, const int)

The following take one __v8hi argument and one int argument which must be a 8-bit compile time constant. They return a __v8hi result.

__v8hi __builtin_arc_vd6tapf (__v8hi, const int)
__v8hi __builtin_arc_vmvaw (__v8hi, const int)
__v8hi __builtin_arc_vmvw (__v8hi, const int)
__v8hi __builtin_arc_vmvzw (__v8hi, const int)

The following take two int arguments, the second of which which must be a 8-bit compile time constant. They return a __v8hi result:

__v8hi __builtin_arc_vmovaw (int, const int)
__v8hi __builtin_arc_vmovw (int, const int)
__v8hi __builtin_arc_vmovzw (int, const int)

The following take a single __v8hi argument and return a __v8hi result:

__v8hi __builtin_arc_vabsaw (__v8hi)
__v8hi __builtin_arc_vabsw (__v8hi)
__v8hi __builtin_arc_vaddsuw (__v8hi)
__v8hi __builtin_arc_vexch1 (__v8hi)
__v8hi __builtin_arc_vexch2 (__v8hi)
__v8hi __builtin_arc_vexch4 (__v8hi)
__v8hi __builtin_arc_vsignw (__v8hi)
__v8hi __builtin_arc_vupbaw (__v8hi)
__v8hi __builtin_arc_vupbw (__v8hi)
__v8hi __builtin_arc_vupsbaw (__v8hi)
__v8hi __builtin_arc_vupsbw (__v8hi)

The followign take two int arguments and return no result:

void __builtin_arc_vdirun (int, int)
void __builtin_arc_vdorun (int, int)

The following take two int arguments and return no result. The first argument must a 3-bit compile time constant indicating one of the DR0-DR7 DMA setup channels:

void __builtin_arc_vdiwr (const int, int)
void __builtin_arc_vdowr (const int, int)

The following take an int argument and return no result:

void __builtin_arc_vendrec (int)
void __builtin_arc_vrec (int)
void __builtin_arc_vrecrun (int)
void __builtin_arc_vrun (int)

The following take a __v8hi argument and two int arguments and return a __v8hi result. The second argument must be a 3-bit compile time constants, indicating one the registers I0-I7, and the third argument must be an 8-bit compile time constant.

Note: Although the equivalent hardware instructions do not take an SIMD register as an operand, these builtins overwrite the relevant bits of the __v8hi register provided as the first argument with the value loaded from the [Ib, u8] location in the SDM.

__v8hi __builtin_arc_vld32 (__v8hi, const int, const int)
__v8hi __builtin_arc_vld32wh (__v8hi, const int, const int)
__v8hi __builtin_arc_vld32wl (__v8hi, const int, const int)
__v8hi __builtin_arc_vld64 (__v8hi, const int, const int)

The following take two int arguments and return a __v8hi result. The first argument must be a 3-bit compile time constants, indicating one the registers I0-I7, and the second argument must be an 8-bit compile time constant.

__v8hi __builtin_arc_vld128 (const int, const int)
__v8hi __builtin_arc_vld64w (const int, const int)

The following take a __v8hi argument and two int arguments and return no result. The second argument must be a 3-bit compile time constants, indicating one the registers I0-I7, and the third argument must be an 8-bit compile time constant.

void __builtin_arc_vst128 (__v8hi, const int, const int)
void __builtin_arc_vst64 (__v8hi, const int, const int)

The following take a __v8hi argument and three int arguments and return no result. The second argument must be a 3-bit compile-time constant, identifying the 16-bit sub-register to be stored, the third argument must be a 3-bit compile time constants, indicating one the registers I0-I7, and the fourth argument must be an 8-bit compile time constant.

void __builtin_arc_vst16_n (__v8hi, const int, const int, const int)
void __builtin_arc_vst32_n (__v8hi, const int, const int, const int)