Previous: PowerPC AltiVec Built-in Functions Available on ISA 2.07, Up: PowerPC AltiVec/VSX Built-in Functions [Contents][Index]

The following additional built-in functions are also available for the
PowerPC family of processors, starting with ISA 3.0
(`-mcpu=power9`) or later:

unsigned int scalar_extract_exp (double source); unsigned long long int scalar_extract_exp (__ieee128 source); unsigned long long int scalar_extract_sig (double source); unsigned __int128 scalar_extract_sig (__ieee128 source); double scalar_insert_exp (unsigned long long int significand, unsigned long long int exponent); double scalar_insert_exp (double significand, unsigned long long int exponent); ieee_128 scalar_insert_exp (unsigned __int128 significand, unsigned long long int exponent); ieee_128 scalar_insert_exp (ieee_128 significand, unsigned long long int exponent); int scalar_cmp_exp_gt (double arg1, double arg2); int scalar_cmp_exp_lt (double arg1, double arg2); int scalar_cmp_exp_eq (double arg1, double arg2); int scalar_cmp_exp_unordered (double arg1, double arg2); bool scalar_test_data_class (float source, const int condition); bool scalar_test_data_class (double source, const int condition); bool scalar_test_data_class (__ieee128 source, const int condition); bool scalar_test_neg (float source); bool scalar_test_neg (double source); bool scalar_test_neg (__ieee128 source);

The `scalar_extract_exp`

and `scalar_extract_sig`

functions require a 64-bit environment supporting ISA 3.0 or later.
The `scalar_extract_exp`

and `scalar_extract_sig`

built-in
functions return the significand and the biased exponent value
respectively of their `source`

arguments.
When supplied with a 64-bit `source`

argument, the
result returned by `scalar_extract_sig`

has
the `0x0010000000000000`

bit set if the
function’s `source`

argument is in normalized form.
Otherwise, this bit is set to 0.
When supplied with a 128-bit `source`

argument, the
`0x00010000000000000000000000000000`

bit of the result is
treated similarly.
Note that the sign of the significand is not represented in the result
returned from the `scalar_extract_sig`

function. Use the
`scalar_test_neg`

function to test the sign of its `double`

argument.

The `scalar_insert_exp`

functions require a 64-bit environment supporting ISA 3.0 or later.
When supplied with a 64-bit first argument, the
`scalar_insert_exp`

built-in function returns a double-precision
floating point value that is constructed by assembling the values of its
`significand`

and `exponent`

arguments. The sign of the
result is copied from the most significant bit of the
`significand`

argument. The significand and exponent components
of the result are composed of the least significant 11 bits of the
`exponent`

argument and the least significant 52 bits of the
`significand`

argument respectively.

When supplied with a 128-bit first argument, the
`scalar_insert_exp`

built-in function returns a quad-precision
ieee floating point value. The sign bit of the result is copied from
the most significant bit of the `significand`

argument.
The significand and exponent components of the result are composed of
the least significant 15 bits of the `exponent`

argument and the
least significant 112 bits of the `significand`

argument respectively.

The `scalar_cmp_exp_gt`

, `scalar_cmp_exp_lt`

,
`scalar_cmp_exp_eq`

, and `scalar_cmp_exp_unordered`

built-in
functions return a non-zero value if `arg1`

is greater than, less
than, equal to, or not comparable to `arg2`

respectively. The
arguments are not comparable if one or the other equals NaN (not a
number).

The `scalar_test_data_class`

built-in function returns 1
if any of the condition tests enabled by the value of the
`condition`

variable are true, and 0 otherwise. The
`condition`

argument must be a compile-time constant integer with
value not exceeding 127. The
`condition`

argument is encoded as a bitmask with each bit
enabling the testing of a different condition, as characterized by the
following:

0x40 Test for NaN 0x20 Test for +Infinity 0x10 Test for -Infinity 0x08 Test for +Zero 0x04 Test for -Zero 0x02 Test for +Denormal 0x01 Test for -Denormal

The `scalar_test_neg`

built-in function returns 1 if its
`source`

argument holds a negative value, 0 otherwise.

The following built-in functions are also available for the PowerPC family
of processors, starting with ISA 3.0 or later
(`-mcpu=power9`). These string functions are described
separately in order to group the descriptions closer to the function
prototypes:

int vec_all_nez (vector signed char, vector signed char); int vec_all_nez (vector unsigned char, vector unsigned char); int vec_all_nez (vector signed short, vector signed short); int vec_all_nez (vector unsigned short, vector unsigned short); int vec_all_nez (vector signed int, vector signed int); int vec_all_nez (vector unsigned int, vector unsigned int); int vec_any_eqz (vector signed char, vector signed char); int vec_any_eqz (vector unsigned char, vector unsigned char); int vec_any_eqz (vector signed short, vector signed short); int vec_any_eqz (vector unsigned short, vector unsigned short); int vec_any_eqz (vector signed int, vector signed int); int vec_any_eqz (vector unsigned int, vector unsigned int); vector bool char vec_cmpnez (vector signed char arg1, vector signed char arg2); vector bool char vec_cmpnez (vector unsigned char arg1, vector unsigned char arg2); vector bool short vec_cmpnez (vector signed short arg1, vector signed short arg2); vector bool short vec_cmpnez (vector unsigned short arg1, vector unsigned short arg2); vector bool int vec_cmpnez (vector signed int arg1, vector signed int arg2); vector bool int vec_cmpnez (vector unsigned int, vector unsigned int); vector signed char vec_cnttz (vector signed char); vector unsigned char vec_cnttz (vector unsigned char); vector signed short vec_cnttz (vector signed short); vector unsigned short vec_cnttz (vector unsigned short); vector signed int vec_cnttz (vector signed int); vector unsigned int vec_cnttz (vector unsigned int); vector signed long long vec_cnttz (vector signed long long); vector unsigned long long vec_cnttz (vector unsigned long long); signed int vec_cntlz_lsbb (vector signed char); signed int vec_cntlz_lsbb (vector unsigned char); signed int vec_cnttz_lsbb (vector signed char); signed int vec_cnttz_lsbb (vector unsigned char); unsigned int vec_first_match_index (vector signed char, vector signed char); unsigned int vec_first_match_index (vector unsigned char, vector unsigned char); unsigned int vec_first_match_index (vector signed int, vector signed int); unsigned int vec_first_match_index (vector unsigned int, vector unsigned int); unsigned int vec_first_match_index (vector signed short, vector signed short); unsigned int vec_first_match_index (vector unsigned short, vector unsigned short); unsigned int vec_first_match_or_eos_index (vector signed char, vector signed char); unsigned int vec_first_match_or_eos_index (vector unsigned char, vector unsigned char); unsigned int vec_first_match_or_eos_index (vector signed int, vector signed int); unsigned int vec_first_match_or_eos_index (vector unsigned int, vector unsigned int); unsigned int vec_first_match_or_eos_index (vector signed short, vector signed short); unsigned int vec_first_match_or_eos_index (vector unsigned short, vector unsigned short); unsigned int vec_first_mismatch_index (vector signed char, vector signed char); unsigned int vec_first_mismatch_index (vector unsigned char, vector unsigned char); unsigned int vec_first_mismatch_index (vector signed int, vector signed int); unsigned int vec_first_mismatch_index (vector unsigned int, vector unsigned int); unsigned int vec_first_mismatch_index (vector signed short, vector signed short); unsigned int vec_first_mismatch_index (vector unsigned short, vector unsigned short); unsigned int vec_first_mismatch_or_eos_index (vector signed char, vector signed char); unsigned int vec_first_mismatch_or_eos_index (vector unsigned char, vector unsigned char); unsigned int vec_first_mismatch_or_eos_index (vector signed int, vector signed int); unsigned int vec_first_mismatch_or_eos_index (vector unsigned int, vector unsigned int); unsigned int vec_first_mismatch_or_eos_index (vector signed short, vector signed short); unsigned int vec_first_mismatch_or_eos_index (vector unsigned short, vector unsigned short); vector unsigned short vec_pack_to_short_fp32 (vector float, vector float); vector signed char vec_xl_be (signed long long, signed char *); vector unsigned char vec_xl_be (signed long long, unsigned char *); vector signed int vec_xl_be (signed long long, signed int *); vector unsigned int vec_xl_be (signed long long, unsigned int *); vector signed __int128 vec_xl_be (signed long long, signed __int128 *); vector unsigned __int128 vec_xl_be (signed long long, unsigned __int128 *); vector signed long long vec_xl_be (signed long long, signed long long *); vector unsigned long long vec_xl_be (signed long long, unsigned long long *); vector signed short vec_xl_be (signed long long, signed short *); vector unsigned short vec_xl_be (signed long long, unsigned short *); vector double vec_xl_be (signed long long, double *); vector float vec_xl_be (signed long long, float *); vector signed char vec_xl_len (signed char *addr, size_t len); vector unsigned char vec_xl_len (unsigned char *addr, size_t len); vector signed int vec_xl_len (signed int *addr, size_t len); vector unsigned int vec_xl_len (unsigned int *addr, size_t len); vector signed __int128 vec_xl_len (signed __int128 *addr, size_t len); vector unsigned __int128 vec_xl_len (unsigned __int128 *addr, size_t len); vector signed long long vec_xl_len (signed long long *addr, size_t len); vector unsigned long long vec_xl_len (unsigned long long *addr, size_t len); vector signed short vec_xl_len (signed short *addr, size_t len); vector unsigned short vec_xl_len (unsigned short *addr, size_t len); vector double vec_xl_len (double *addr, size_t len); vector float vec_xl_len (float *addr, size_t len); vector unsigned char vec_xl_len_r (unsigned char *addr, size_t len); void vec_xst_len (vector signed char data, signed char *addr, size_t len); void vec_xst_len (vector unsigned char data, unsigned char *addr, size_t len); void vec_xst_len (vector signed int data, signed int *addr, size_t len); void vec_xst_len (vector unsigned int data, unsigned int *addr, size_t len); void vec_xst_len (vector unsigned __int128 data, unsigned __int128 *addr, size_t len); void vec_xst_len (vector signed long long data, signed long long *addr, size_t len); void vec_xst_len (vector unsigned long long data, unsigned long long *addr, size_t len); void vec_xst_len (vector signed short data, signed short *addr, size_t len); void vec_xst_len (vector unsigned short data, unsigned short *addr, size_t len); void vec_xst_len (vector signed __int128 data, signed __int128 *addr, size_t len); void vec_xst_len (vector double data, double *addr, size_t len); void vec_xst_len (vector float data, float *addr, size_t len); void vec_xst_len_r (vector unsigned char data, unsigned char *addr, size_t len); signed char vec_xlx (unsigned int index, vector signed char data); unsigned char vec_xlx (unsigned int index, vector unsigned char data); signed short vec_xlx (unsigned int index, vector signed short data); unsigned short vec_xlx (unsigned int index, vector unsigned short data); signed int vec_xlx (unsigned int index, vector signed int data); unsigned int vec_xlx (unsigned int index, vector unsigned int data); float vec_xlx (unsigned int index, vector float data); signed char vec_xrx (unsigned int index, vector signed char data); unsigned char vec_xrx (unsigned int index, vector unsigned char data); signed short vec_xrx (unsigned int index, vector signed short data); unsigned short vec_xrx (unsigned int index, vector unsigned short data); signed int vec_xrx (unsigned int index, vector signed int data); unsigned int vec_xrx (unsigned int index, vector unsigned int data); float vec_xrx (unsigned int index, vector float data);

The `vec_all_nez`

, `vec_any_eqz`

, and `vec_cmpnez`

perform pairwise comparisons between the elements at the same
positions within their two vector arguments.
The `vec_all_nez`

function returns a
non-zero value if and only if all pairwise comparisons are not
equal and no element of either vector argument contains a zero.
The `vec_any_eqz`

function returns a
non-zero value if and only if at least one pairwise comparison is equal
or if at least one element of either vector argument contains a zero.
The `vec_cmpnez`

function returns a vector of the same type as
its two arguments, within which each element consists of all ones to
denote that either the corresponding elements of the incoming arguments are
not equal or that at least one of the corresponding elements contains
zero. Otherwise, the element of the returned vector contains all zeros.

The `vec_cntlz_lsbb`

function returns the count of the number of
consecutive leading byte elements (starting from position 0 within the
supplied vector argument) for which the least-significant bit
equals zero. The `vec_cnttz_lsbb`

function returns the count of
the number of consecutive trailing byte elements (starting from
position 15 and counting backwards within the supplied vector
argument) for which the least-significant bit equals zero.

The `vec_xl_len`

and `vec_xst_len`

functions require a
64-bit environment supporting ISA 3.0 or later. The `vec_xl_len`

function loads a variable length vector from memory. The
`vec_xst_len`

function stores a variable length vector to memory.
With both the `vec_xl_len`

and `vec_xst_len`

functions, the
`addr`

argument represents the memory address to or from which
data will be transferred, and the
`len`

argument represents the number of bytes to be
transferred, as computed by the C expression `min((len & 0xff), 16)`

.
If this expression’s value is not a multiple of the vector element’s
size, the behavior of this function is undefined.
In the case that the underlying computer is configured to run in
big-endian mode, the data transfer moves bytes 0 to `(len - 1)`

of
the corresponding vector. In little-endian mode, the data transfer
moves bytes `(16 - len)`

to `15`

of the corresponding
vector. For the load function, any bytes of the result vector that
are not loaded from memory are set to zero.
The value of the `addr`

argument need not be aligned on a
multiple of the vector’s element size.

The `vec_xlx`

and `vec_xrx`

functions extract the single
element selected by the `index`

argument from the vector
represented by the `data`

argument. The `index`

argument
always specifies a byte offset, regardless of the size of the vector
element. With `vec_xlx`

, `index`

is the offset of the first
byte of the element to be extracted. With `vec_xrx`

, `index`

represents the last byte of the element to be extracted, measured
from the right end of the vector. In other words, the last byte of
the element to be extracted is found at position `(15 - index)`

.
There is no requirement that `index`

be a multiple of the vector
element size. However, if the size of the vector element added to
`index`

is greater than 15, the content of the returned value is
undefined.

If the ISA 3.0 instruction set additions (`-mcpu=power9`)
are available:

vector unsigned long long vec_bperm (vector unsigned long long, vector unsigned char); vector bool char vec_cmpne (vector bool char, vector bool char); vector bool char vec_cmpne (vector signed char, vector signed char); vector bool char vec_cmpne (vector unsigned char, vector unsigned char); vector bool int vec_cmpne (vector bool int, vector bool int); vector bool int vec_cmpne (vector signed int, vector signed int); vector bool int vec_cmpne (vector unsigned int, vector unsigned int); vector bool long long vec_cmpne (vector bool long long, vector bool long long); vector bool long long vec_cmpne (vector signed long long, vector signed long long); vector bool long long vec_cmpne (vector unsigned long long, vector unsigned long long); vector bool short vec_cmpne (vector bool short, vector bool short); vector bool short vec_cmpne (vector signed short, vector signed short); vector bool short vec_cmpne (vector unsigned short, vector unsigned short); vector bool long long vec_cmpne (vector double, vector double); vector bool int vec_cmpne (vector float, vector float); vector float vec_extract_fp32_from_shorth (vector unsigned short); vector float vec_extract_fp32_from_shortl (vector unsigned short); vector long long vec_vctz (vector long long); vector unsigned long long vec_vctz (vector unsigned long long); vector int vec_vctz (vector int); vector unsigned int vec_vctz (vector int); vector short vec_vctz (vector short); vector unsigned short vec_vctz (vector unsigned short); vector signed char vec_vctz (vector signed char); vector unsigned char vec_vctz (vector unsigned char); vector signed char vec_vctzb (vector signed char); vector unsigned char vec_vctzb (vector unsigned char); vector long long vec_vctzd (vector long long); vector unsigned long long vec_vctzd (vector unsigned long long); vector short vec_vctzh (vector short); vector unsigned short vec_vctzh (vector unsigned short); vector int vec_vctzw (vector int); vector unsigned int vec_vctzw (vector int); vector unsigned long long vec_extract4b (vector unsigned char, const int); vector unsigned char vec_insert4b (vector signed int, vector unsigned char, const int); vector unsigned char vec_insert4b (vector unsigned int, vector unsigned char, const int); vector unsigned int vec_parity_lsbb (vector signed int); vector unsigned int vec_parity_lsbb (vector unsigned int); vector unsigned __int128 vec_parity_lsbb (vector signed __int128); vector unsigned __int128 vec_parity_lsbb (vector unsigned __int128); vector unsigned long long vec_parity_lsbb (vector signed long long); vector unsigned long long vec_parity_lsbb (vector unsigned long long); vector int vec_vprtyb (vector int); vector unsigned int vec_vprtyb (vector unsigned int); vector long long vec_vprtyb (vector long long); vector unsigned long long vec_vprtyb (vector unsigned long long); vector int vec_vprtybw (vector int); vector unsigned int vec_vprtybw (vector unsigned int); vector long long vec_vprtybd (vector long long); vector unsigned long long vec_vprtybd (vector unsigned long long);

On 64-bit targets, if the ISA 3.0 additions (`-mcpu=power9`)
are available:

vector long vec_vprtyb (vector long); vector unsigned long vec_vprtyb (vector unsigned long); vector __int128 vec_vprtyb (vector __int128); vector __uint128 vec_vprtyb (vector __uint128); vector long vec_vprtybd (vector long); vector unsigned long vec_vprtybd (vector unsigned long); vector __int128 vec_vprtybq (vector __int128); vector __uint128 vec_vprtybd (vector __uint128);

The following built-in vector functions are available for the PowerPC family
of processors, starting with ISA 3.0 or later (`-mcpu=power9`):

__vector unsigned char vec_slv (__vector unsigned char src, __vector unsigned char shift_distance); __vector unsigned char vec_srv (__vector unsigned char src, __vector unsigned char shift_distance);

The `vec_slv`

and `vec_srv`

functions operate on
all of the bytes of their `src`

and `shift_distance`

arguments in parallel. The behavior of the `vec_slv`

is as if
there existed a temporary array of 17 unsigned characters
`slv_array`

within which elements 0 through 15 are the same as
the entries in the `src`

array and element 16 equals 0. The
result returned from the `vec_slv`

function is a
`__vector`

of 16 unsigned characters within which element
`i`

is computed using the C expression
```
0xff & (*((unsigned short *)(slv_array + i)) << (0x07 &
shift_distance[i]))
```

,
with this resulting value coerced to the `unsigned char`

type.
The behavior of the `vec_srv`

is as if
there existed a temporary array of 17 unsigned characters
`srv_array`

within which element 0 equals zero and
elements 1 through 16 equal the elements 0 through 15 of
the `src`

array. The
result returned from the `vec_srv`

function is a
`__vector`

of 16 unsigned characters within which element
`i`

is computed using the C expression
```
0xff & (*((unsigned short *)(srv_array + i)) >>
(0x07 & shift_distance[i]))
```

,
with this resulting value coerced to the `unsigned char`

type.

The following built-in functions are available for the PowerPC family
of processors, starting with ISA 3.0 or later (`-mcpu=power9`):

__vector unsigned char vec_absd (__vector unsigned char arg1, __vector unsigned char arg2); __vector unsigned short vec_absd (__vector unsigned short arg1, __vector unsigned short arg2); __vector unsigned int vec_absd (__vector unsigned int arg1, __vector unsigned int arg2); __vector unsigned char vec_absdb (__vector unsigned char arg1, __vector unsigned char arg2); __vector unsigned short vec_absdh (__vector unsigned short arg1, __vector unsigned short arg2); __vector unsigned int vec_absdw (__vector unsigned int arg1, __vector unsigned int arg2);

The `vec_absd`

, `vec_absdb`

, `vec_absdh`

, and
`vec_absdw`

built-in functions each computes the absolute
differences of the pairs of vector elements supplied in its two vector
arguments, placing the absolute differences into the corresponding
elements of the vector result.

The following built-in functions are available for the PowerPC family
of processors, starting with ISA 3.0 or later (`-mcpu=power9`):

__vector unsigned int vec_extract_exp (__vector float source); __vector unsigned long long int vec_extract_exp (__vector double source); __vector unsigned int vec_extract_sig (__vector float source); __vector unsigned long long int vec_extract_sig (__vector double source); __vector float vec_insert_exp (__vector unsigned int significands, __vector unsigned int exponents); __vector float vec_insert_exp (__vector unsigned float significands, __vector unsigned int exponents); __vector double vec_insert_exp (__vector unsigned long long int significands, __vector unsigned long long int exponents); __vector double vec_insert_exp (__vector unsigned double significands, __vector unsigned long long int exponents); __vector bool int vec_test_data_class (__vector float source, const int condition); __vector bool long long int vec_test_data_class (__vector double source, const int condition);

The `vec_extract_sig`

and `vec_extract_exp`

built-in
functions return vectors representing the significands and biased
exponent values of their `source`

arguments respectively.
Within the result vector returned by `vec_extract_sig`

, the
`0x800000`

bit of each vector element returned when the
function’s `source`

argument is of type `float`

is set to 1
if the corresponding floating point value is in normalized form.
Otherwise, this bit is set to 0. When the `source`

argument is
of type `double`

, the `0x10000000000000`

bit within each of
the result vector’s elements is set according to the same rules.
Note that the sign of the significand is not represented in the result
returned from the `vec_extract_sig`

function. To extract the
sign bits, use the
`vec_cpsgn`

function, which returns a new vector within which all
of the sign bits of its second argument vector are overwritten with the
sign bits copied from the coresponding elements of its first argument
vector, and all other (non-sign) bits of the second argument vector
are copied unchanged into the result vector.

The `vec_insert_exp`

built-in functions return a vector of
single- or double-precision floating
point values constructed by assembling the values of their
`significands`

and `exponents`

arguments into the
corresponding elements of the returned vector.
The sign of each
element of the result is copied from the most significant bit of the
corresponding entry within the `significands`

argument.
Note that the relevant
bits of the `significands`

argument are the same, for both integer
and floating point types.
The
significand and exponent components of each element of the result are
composed of the least significant bits of the corresponding
`significands`

element and the least significant bits of the
corresponding `exponents`

element.

The `vec_test_data_class`

built-in function returns a vector
representing the results of testing the `source`

vector for the
condition selected by the `condition`

argument. The
`condition`

argument must be a compile-time constant integer with
value not exceeding 127. The
`condition`

argument is encoded as a bitmask with each bit
enabling the testing of a different condition, as characterized by the
following:

If any of the enabled test conditions is true, the corresponding entry in the result vector is -1. Otherwise (all of the enabled test conditions are false), the corresponding entry of the result vector is 0.

The following built-in functions are available for the PowerPC family
of processors, starting with ISA 3.0 or later (`-mcpu=power9`):

vector unsigned int vec_rlmi (vector unsigned int, vector unsigned int, vector unsigned int); vector unsigned long long vec_rlmi (vector unsigned long long, vector unsigned long long, vector unsigned long long); vector unsigned int vec_rlnm (vector unsigned int, vector unsigned int, vector unsigned int); vector unsigned long long vec_rlnm (vector unsigned long long, vector unsigned long long, vector unsigned long long); vector unsigned int vec_vrlnm (vector unsigned int, vector unsigned int); vector unsigned long long vec_vrlnm (vector unsigned long long, vector unsigned long long);

The result of `vec_rlmi`

is obtained by rotating each element of
the first argument vector left and inserting it under mask into the
second argument vector. The third argument vector contains the mask
beginning in bits 11:15, the mask end in bits 19:23, and the shift
count in bits 27:31, of each element.

The result of `vec_rlnm`

is obtained by rotating each element of
the first argument vector left and ANDing it with a mask specified by
the second and third argument vectors. The second argument vector
contains the shift count for each element in the low-order byte. The
third argument vector contains the mask end for each element in the
low-order byte, with the mask begin in the next higher byte.

The result of `vec_vrlnm`

is obtained by rotating each element
of the first argument vector left and ANDing it with a mask. The
second argument vector contains the mask beginning in bits 11:15,
the mask end in bits 19:23, and the shift count in bits 27:31,
of each element.

If the ISA 3.0 instruction set additions (`-mcpu=power9`)
are available:

vector signed bool char vec_revb (vector signed char); vector signed char vec_revb (vector signed char); vector unsigned char vec_revb (vector unsigned char); vector bool short vec_revb (vector bool short); vector short vec_revb (vector short); vector unsigned short vec_revb (vector unsigned short); vector bool int vec_revb (vector bool int); vector int vec_revb (vector int); vector unsigned int vec_revb (vector unsigned int); vector float vec_revb (vector float); vector bool long long vec_revb (vector bool long long); vector long long vec_revb (vector long long); vector unsigned long long vec_revb (vector unsigned long long); vector double vec_revb (vector double);

On 64-bit targets, if the ISA 3.0 additions (`-mcpu=power9`)
are available:

vector long vec_revb (vector long); vector unsigned long vec_revb (vector unsigned long); vector __int128 vec_revb (vector __int128); vector __uint128 vec_revb (vector __uint128);

The `vec_revb`

built-in function reverses the bytes on an element
by element basis. A vector of `vector unsigned char`

or
`vector signed char`

reverses the bytes in the whole word.

If the cryptographic instructions are enabled (`-mcrypto` or
`-mcpu=power8`), the following builtins are enabled.

vector unsigned long long __builtin_crypto_vsbox (vector unsigned long long); vector unsigned long long __builtin_crypto_vcipher (vector unsigned long long, vector unsigned long long); vector unsigned long long __builtin_crypto_vcipherlast (vector unsigned long long, vector unsigned long long); vector unsigned long long __builtin_crypto_vncipher (vector unsigned long long, vector unsigned long long); vector unsigned long long __builtin_crypto_vncipherlast (vector unsigned long long, vector unsigned long long); vector unsigned char __builtin_crypto_vpermxor (vector unsigned char, vector unsigned char, vector unsigned char); vector unsigned short __builtin_crypto_vpermxor (vector unsigned short, vector unsigned short, vector unsigned short); vector unsigned int __builtin_crypto_vpermxor (vector unsigned int, vector unsigned int, vector unsigned int); vector unsigned long long __builtin_crypto_vpermxor (vector unsigned long long, vector unsigned long long, vector unsigned long long); vector unsigned char __builtin_crypto_vpmsumb (vector unsigned char, vector unsigned char); vector unsigned short __builtin_crypto_vpmsumb (vector unsigned short, vector unsigned short); vector unsigned int __builtin_crypto_vpmsumb (vector unsigned int, vector unsigned int); vector unsigned long long __builtin_crypto_vpmsumb (vector unsigned long long, vector unsigned long long); vector unsigned long long __builtin_crypto_vshasigmad (vector unsigned long long, int, int); vector unsigned int __builtin_crypto_vshasigmaw (vector unsigned int, int, int);

The second argument to `__builtin_crypto_vshasigmad` and
`__builtin_crypto_vshasigmaw` must be a constant
integer that is 0 or 1. The third argument to these built-in functions
must be a constant integer in the range of 0 to 15.

If the ISA 3.0 instruction set additions
are enabled (`-mcpu=power9`), the following additional
functions are available for both 32-bit and 64-bit targets.

vector short vec_xl (int, vector short *); vector short vec_xl (int, short *); vector unsigned short vec_xl (int, vector unsigned short *); vector unsigned short vec_xl (int, unsigned short *); vector char vec_xl (int, vector char *); vector char vec_xl (int, char *); vector unsigned char vec_xl (int, vector unsigned char *); vector unsigned char vec_xl (int, unsigned char *); void vec_xst (vector short, int, vector short *); void vec_xst (vector short, int, short *); void vec_xst (vector unsigned short, int, vector unsigned short *); void vec_xst (vector unsigned short, int, unsigned short *); void vec_xst (vector char, int, vector char *); void vec_xst (vector char, int, char *); void vec_xst (vector unsigned char, int, vector unsigned char *); void vec_xst (vector unsigned char, int, unsigned char *);