1.9. SIMD Intrinsics
This section describes SIMD intrinsic functions that are only supported in device code. To use these functions you do not need to include any additional header files in your program.
Functions
 __device__ unsigned int __vabs2 ( unsigned int a )
 Computes perhalfword absolute value.
 __device__ unsigned int __vabs4 ( unsigned int a )
 Computes perbyte absolute value.
 __device__ unsigned int __vabsdiffs2 ( unsigned int a, unsigned int b )
 Computes perhalfword sum of absolute difference of signed integer.
 __device__ unsigned int __vabsdiffs4 ( unsigned int a, unsigned int b )
 Computes perbyte absolute difference of signed integer.
 __device__ unsigned int __vabsdiffu2 ( unsigned int a, unsigned int b )
 Performs perhalfword absolute difference of unsigned integer computation: a  b.
 __device__ unsigned int __vabsdiffu4 ( unsigned int a, unsigned int b )
 Computes perbyte absolute difference of unsigned integer.
 __device__ unsigned int __vabsss2 ( unsigned int a )
 Computes perhalfword absolute value with signed saturation.
 __device__ unsigned int __vabsss4 ( unsigned int a )
 Computes perbyte absolute value with signed saturation.
 __device__ unsigned int __vadd2 ( unsigned int a, unsigned int b )
 Performs perhalfword (un)signed addition, with wraparound: a + b.
 __device__ unsigned int __vadd4 ( unsigned int a, unsigned int b )
 Performs perbyte (un)signed addition.
 __device__ unsigned int __vaddss2 ( unsigned int a, unsigned int b )
 Performs perhalfword addition with signed saturation.
 __device__ unsigned int __vaddss4 ( unsigned int a, unsigned int b )
 Performs perbyte addition with signed saturation.
 __device__ unsigned int __vaddus2 ( unsigned int a, unsigned int b )
 Performs perhalfword addition with unsigned saturation.
 __device__ unsigned int __vaddus4 ( unsigned int a, unsigned int b )
 Performs perbyte addition with unsigned saturation.
 __device__ unsigned int __vavgs2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed rounded average computation.
 __device__ unsigned int __vavgs4 ( unsigned int a, unsigned int b )
 Computes perbyte signed rounder average.
 __device__ unsigned int __vavgu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned rounded average computation.
 __device__ unsigned int __vavgu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned rounded average.
 __device__ unsigned int __vcmpeq2 ( unsigned int a, unsigned int b )
 Performs perhalfword (un)signed comparison.
 __device__ unsigned int __vcmpeq4 ( unsigned int a, unsigned int b )
 Performs perbyte (un)signed comparison.
 __device__ unsigned int __vcmpges2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed comparison: a >= b ? 0xffff : 0.
 __device__ unsigned int __vcmpges4 ( unsigned int a, unsigned int b )
 Performs perbyte signed comparison.
 __device__ unsigned int __vcmpgeu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned comparison: a >= b ? 0xffff : 0.
 __device__ unsigned int __vcmpgeu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned comparison.
 __device__ unsigned int __vcmpgts2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed comparison: a > b ? 0xffff : 0.
 __device__ unsigned int __vcmpgts4 ( unsigned int a, unsigned int b )
 Performs perbyte signed comparison.
 __device__ unsigned int __vcmpgtu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned comparison: a > b ? 0xffff : 0.
 __device__ unsigned int __vcmpgtu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned comparison.
 __device__ unsigned int __vcmples2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed comparison: a <= b ? 0xffff : 0.
 __device__ unsigned int __vcmples4 ( unsigned int a, unsigned int b )
 Performs perbyte signed comparison.
 __device__ unsigned int __vcmpleu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned comparison: a <= b ? 0xffff : 0.
 __device__ unsigned int __vcmpleu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned comparison.
 __device__ unsigned int __vcmplts2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed comparison: a < b ? 0xffff : 0.
 __device__ unsigned int __vcmplts4 ( unsigned int a, unsigned int b )
 Performs perbyte signed comparison.
 __device__ unsigned int __vcmpltu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned comparison: a < b ? 0xffff : 0.
 __device__ unsigned int __vcmpltu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned comparison.
 __device__ unsigned int __vcmpne2 ( unsigned int a, unsigned int b )
 Performs perhalfword (un)signed comparison: a != b ? 0xffff : 0.
 __device__ unsigned int __vcmpne4 ( unsigned int a, unsigned int b )
 Performs perbyte (un)signed comparison.
 __device__ unsigned int __vhaddu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned average computation.
 __device__ unsigned int __vhaddu4 ( unsigned int a, unsigned int b )
 Computes perbyte unsigned average.
 __device__ unsigned int __vmaxs2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed maximum computation.
 __device__ unsigned int __vmaxs4 ( unsigned int a, unsigned int b )
 Computes perbyte signed maximum.
 __device__ unsigned int __vmaxu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned maximum computation.
 __device__ unsigned int __vmaxu4 ( unsigned int a, unsigned int b )
 Computes perbyte unsigned maximum.
 __device__ unsigned int __vmins2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed minimum computation.
 __device__ unsigned int __vmins4 ( unsigned int a, unsigned int b )
 Computes perbyte signed minimum.
 __device__ unsigned int __vminu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned minimum computation.
 __device__ unsigned int __vminu4 ( unsigned int a, unsigned int b )
 Computes perbyte unsigned minimum.
 __device__ unsigned int __vneg2 ( unsigned int a )
 Computes perhalfword negation.
 __device__ unsigned int __vneg4 ( unsigned int a )
 Performs perbyte negation.
 __device__ unsigned int __vnegss2 ( unsigned int a )
 Computes perhalfword negation with signed saturation.
 __device__ unsigned int __vnegss4 ( unsigned int a )
 Performs perbyte negation with signed saturation.
 __device__ unsigned int __vsads2 ( unsigned int a, unsigned int b )
 Performs perhalfword sum of absolute difference of signed.
 __device__ unsigned int __vsads4 ( unsigned int a, unsigned int b )
 Computes perbyte sum of abs difference of signed.
 __device__ unsigned int __vsadu2 ( unsigned int a, unsigned int b )
 Computes perhalfword sum of abs diff of unsigned.
 __device__ unsigned int __vsadu4 ( unsigned int a, unsigned int b )
 Computes perbyte sum af abs difference of unsigned.
 __device__ unsigned int __vseteq2 ( unsigned int a, unsigned int b )
 Performs perhalfword (un)signed comparison.
 __device__ unsigned int __vseteq4 ( unsigned int a, unsigned int b )
 Performs perbyte (un)signed comparison.
 __device__ unsigned int __vsetges2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed comparison.
 __device__ unsigned int __vsetges4 ( unsigned int a, unsigned int b )
 Performs perbyte signed comparison.
 __device__ unsigned int __vsetgeu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned minimum unsigned comparison.
 __device__ unsigned int __vsetgeu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned comparison.
 __device__ unsigned int __vsetgts2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed comparison.
 __device__ unsigned int __vsetgts4 ( unsigned int a, unsigned int b )
 Performs perbyte signed comparison.
 __device__ unsigned int __vsetgtu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned comparison.
 __device__ unsigned int __vsetgtu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned comparison.
 __device__ unsigned int __vsetles2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned minimum computation.
 __device__ unsigned int __vsetles4 ( unsigned int a, unsigned int b )
 Performs perbyte signed comparison.
 __device__ unsigned int __vsetleu2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed comparison.
 __device__ unsigned int __vsetleu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned comparison.
 __device__ unsigned int __vsetlts2 ( unsigned int a, unsigned int b )
 Performs perhalfword signed comparison.
 __device__ unsigned int __vsetlts4 ( unsigned int a, unsigned int b )
 Performs perbyte signed comparison.
 __device__ unsigned int __vsetltu2 ( unsigned int a, unsigned int b )
 Performs perhalfword unsigned comparison.
 __device__ unsigned int __vsetltu4 ( unsigned int a, unsigned int b )
 Performs perbyte unsigned comparison.
 __device__ unsigned int __vsetne2 ( unsigned int a, unsigned int b )
 Performs perhalfword (un)signed comparison.
 __device__ unsigned int __vsetne4 ( unsigned int a, unsigned int b )
 Performs perbyte (un)signed comparison.
 __device__ unsigned int __vsub2 ( unsigned int a, unsigned int b )
 Performs perhalfword (un)signed substraction, with wraparound.
 __device__ unsigned int __vsub4 ( unsigned int a, unsigned int b )
 Performs perbyte substraction.
 __device__ unsigned int __vsubss2 ( unsigned int a, unsigned int b )
 Performs perhalfword (un)signed substraction, with signed saturation.
 __device__ unsigned int __vsubss4 ( unsigned int a, unsigned int b )
 Performs perbyte substraction with signed saturation.
 __device__ unsigned int __vsubus2 ( unsigned int a, unsigned int b )
 Performs perhalfword substraction with unsigned saturation.
 __device__ unsigned int __vsubus4 ( unsigned int a, unsigned int b )
 Performs perbyte substraction with unsigned saturation.
Functions
 __device__ unsigned int __vabs2 ( unsigned int a )

Computes perhalfword absolute value.
Returns
Returns computed value.
Description
Splits 4 bytes of argument into 2 parts, each consisting of 2 bytes, then computes absolute value for each of parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vabs4 ( unsigned int a )

Computes perbyte absolute value.
Returns
Returns computed value.
Description
Splits argument by bytes. Computes absolute value of each byte. Result is stored as unsigned int.
 __device__ unsigned int __vabsdiffs2 ( unsigned int a, unsigned int b )

Computes perhalfword sum of absolute difference of signed integer.
Returns
Returns computed value.
Description
Splits 4 bytes of each into 2 parts, each consisting of 2 bytes. For corresponding parts function computes absolute difference. Result is stored as unsigned int and returned.
 __device__ unsigned int __vabsdiffs4 ( unsigned int a, unsigned int b )

Computes perbyte absolute difference of signed integer.
Returns
Returns computed value.
Description
Splits 4 bytes of each into 4 parts, each consisting of 1 byte. For corresponding parts function computes absolute difference. Result is stored as unsigned int and returned.
 __device__ unsigned int __vabsdiffu2 ( unsigned int a, unsigned int b )

Performs perhalfword absolute difference of unsigned integer computation: a  b.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function computes absolute difference. Result is stored as unsigned int and returned.
 __device__ unsigned int __vabsdiffu4 ( unsigned int a, unsigned int b )

Computes perbyte absolute difference of unsigned integer.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function computes absolute difference. Result is stored as unsigned int and returned.
 __device__ unsigned int __vabsss2 ( unsigned int a )

Computes perhalfword absolute value with signed saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of argument into 2 parts, each consisting of 2 bytes, then computes absolute value with signed saturation for each of parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vabsss4 ( unsigned int a )

Computes perbyte absolute value with signed saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of argument into 4 parts, each consisting of 1 byte, then computes absolute value with signed saturation for each of parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vadd2 ( unsigned int a, unsigned int b )

Performs perhalfword (un)signed addition, with wraparound: a + b.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes, then performs unsigned addition on corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vadd4 ( unsigned int a, unsigned int b )

Performs perbyte (un)signed addition.
Returns
Returns computed value.
Description
Splits 'a' into 4 bytes, then performs unsigned addition on each of these bytes with the corresponding byte from 'b', ignoring overflow. Result is stored as unsigned int and returned.
 __device__ unsigned int __vaddss2 ( unsigned int a, unsigned int b )

Performs perhalfword addition with signed saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes, then performs addition with signed saturation on corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vaddss4 ( unsigned int a, unsigned int b )

Performs perbyte addition with signed saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte, then performs addition with signed saturation on corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vaddus2 ( unsigned int a, unsigned int b )

Performs perhalfword addition with unsigned saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes, then performs addition with unsigned saturation on corresponding parts.
 __device__ unsigned int __vaddus4 ( unsigned int a, unsigned int b )

Performs perbyte addition with unsigned saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte, then performs addition with unsigned saturation on corresponding parts.
 __device__ unsigned int __vavgs2 ( unsigned int a, unsigned int b )

Performs perhalfword signed rounded average computation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. then computes signed rounded avarege of corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vavgs4 ( unsigned int a, unsigned int b )

Computes perbyte signed rounder average.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. then computes signed rounded avarege of corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vavgu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned rounded average computation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. then computes unsigned rounded avarege of corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vavgu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned rounded average.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. then computes unsigned rounded avarege of corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vcmpeq2 ( unsigned int a, unsigned int b )

Performs perhalfword (un)signed comparison.
Returns
Returns 0xffff computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if they are equal, and 0000 otherwise. For example __vcmpeq2(0x1234aba5, 0x1234aba6) returns 0xffff0000.
 __device__ unsigned int __vcmpeq4 ( unsigned int a, unsigned int b )

Performs perbyte (un)signed comparison.
Returns
Returns 0xff if a = b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if they are equal, and 00 otherwise. For example __vcmpeq4(0x1234aba5, 0x1234aba6) returns 0xffffff00.
 __device__ unsigned int __vcmpges2 ( unsigned int a, unsigned int b )

Performs perhalfword signed comparison: a >= b ? 0xffff : 0.
Returns
Returns 0xffff if a >= b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part >= 'b' part, and 0000 otherwise. For example __vcmpges2(0x1234aba5, 0x1234aba6) returns 0xffff0000.
 __device__ unsigned int __vcmpges4 ( unsigned int a, unsigned int b )

Performs perbyte signed comparison.
Returns
Returns 0xff if a >= b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part >= 'b' part, and 00 otherwise. For example __vcmpges4(0x1234aba5, 0x1234aba6) returns 0xffffff00.
 __device__ unsigned int __vcmpgeu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned comparison: a >= b ? 0xffff : 0.
Returns
Returns 0xffff if a >= b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part >= 'b' part, and 0000 otherwise. For example __vcmpgeu2(0x1234aba5, 0x1234aba6) returns 0xffff0000.
 __device__ unsigned int __vcmpgeu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned comparison.
Returns
Returns 0xff if a = b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part >= 'b' part, and 00 otherwise. For example __vcmpgeu4(0x1234aba5, 0x1234aba6) returns 0xffffff00.
 __device__ unsigned int __vcmpgts2 ( unsigned int a, unsigned int b )

Performs perhalfword signed comparison: a > b ? 0xffff : 0.
Returns
Returns 0xffff if a > b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part > 'b' part, and 0000 otherwise. For example __vcmpgts2(0x1234aba5, 0x1234aba6) returns 0x00000000.
 __device__ unsigned int __vcmpgts4 ( unsigned int a, unsigned int b )

Performs perbyte signed comparison.
Returns
Returns 0xff if a > b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part > 'b' part, and 00 otherwise. For example __vcmpgts4(0x1234aba5, 0x1234aba6) returns 0x00000000.
 __device__ unsigned int __vcmpgtu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned comparison: a > b ? 0xffff : 0.
Returns
Returns 0xffff if a > b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part > 'b' part, and 0000 otherwise. For example __vcmpgtu2(0x1234aba5, 0x1234aba6) returns 0x00000000.
 __device__ unsigned int __vcmpgtu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned comparison.
Returns
Returns 0xff if a > b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part > 'b' part, and 00 otherwise. For example __vcmpgtu4(0x1234aba5, 0x1234aba6) returns 0x00000000.
 __device__ unsigned int __vcmples2 ( unsigned int a, unsigned int b )

Performs perhalfword signed comparison: a <= b ? 0xffff : 0.
Returns
Returns 0xffff if a <= b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part <= 'b' part, and 0000 otherwise. For example __vcmples2(0x1234aba5, 0x1234aba6) returns 0xffffffff.
 __device__ unsigned int __vcmples4 ( unsigned int a, unsigned int b )

Performs perbyte signed comparison.
Returns
Returns 0xff if a <= b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part <= 'b' part, and 00 otherwise. For example __vcmples4(0x1234aba5, 0x1234aba6) returns 0xffffffff.
 __device__ unsigned int __vcmpleu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned comparison: a <= b ? 0xffff : 0.
Returns
Returns 0xffff if a <= b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part <= 'b' part, and 0000 otherwise. For example __vcmpleu2(0x1234aba5, 0x1234aba6) returns 0xffffffff.
 __device__ unsigned int __vcmpleu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned comparison.
Returns
Returns 0xff if a <= b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part <= 'b' part, and 00 otherwise. For example __vcmpleu4(0x1234aba5, 0x1234aba6) returns 0xffffffff.
 __device__ unsigned int __vcmplts2 ( unsigned int a, unsigned int b )

Performs perhalfword signed comparison: a < b ? 0xffff : 0.
Returns
Returns 0xffff if a < b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part < 'b' part, and 0000 otherwise. For example __vcmplts2(0x1234aba5, 0x1234aba6) returns 0x0000ffff.
 __device__ unsigned int __vcmplts4 ( unsigned int a, unsigned int b )

Performs perbyte signed comparison.
Returns
Returns 0xff if a < b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part < 'b' part, and 00 otherwise. For example __vcmplts4(0x1234aba5, 0x1234aba6) returns 0x000000ff.
 __device__ unsigned int __vcmpltu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned comparison: a < b ? 0xffff : 0.
Returns
Returns 0xffff if a < b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part < 'b' part, and 0000 otherwise. For example __vcmpltu2(0x1234aba5, 0x1234aba6) returns 0x0000ffff.
 __device__ unsigned int __vcmpltu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned comparison.
Returns
Returns 0xff if a < b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part < 'b' part, and 00 otherwise. For example __vcmpltu4(0x1234aba5, 0x1234aba6) returns 0x000000ff.
 __device__ unsigned int __vcmpne2 ( unsigned int a, unsigned int b )

Performs perhalfword (un)signed comparison: a != b ? 0xffff : 0.
Returns
Returns 0xffff if a != b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts result is ffff if 'a' part != 'b' part, and 0000 otherwise. For example __vcmplts2(0x1234aba5, 0x1234aba6) returns 0x0000ffff.
 __device__ unsigned int __vcmpne4 ( unsigned int a, unsigned int b )

Performs perbyte (un)signed comparison.
Returns
Returns 0xff if a != b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts result is ff if 'a' part != 'b' part, and 00 otherwise. For example __vcmplts4(0x1234aba5, 0x1234aba6) returns 0x000000ff.
 __device__ unsigned int __vhaddu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned average computation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. then computes unsigned avarege of corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vhaddu4 ( unsigned int a, unsigned int b )

Computes perbyte unsigned average.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. then computes unsigned avarege of corresponding parts. Result is stored as unsigned int and returned.
 __device__ unsigned int __vmaxs2 ( unsigned int a, unsigned int b )

Performs perhalfword signed maximum computation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function computes signed maximum. Result is stored as unsigned int and returned.
 __device__ unsigned int __vmaxs4 ( unsigned int a, unsigned int b )

Computes perbyte signed maximum.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function computes signed maximum. Result is stored as unsigned int and returned.
 __device__ unsigned int __vmaxu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned maximum computation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function computes unsigned maximum. Result is stored as unsigned int and returned.
 __device__ unsigned int __vmaxu4 ( unsigned int a, unsigned int b )

Computes perbyte unsigned maximum.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function computes unsigned maximum. Result is stored as unsigned int and returned.
 __device__ unsigned int __vmins2 ( unsigned int a, unsigned int b )

Performs perhalfword signed minimum computation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function computes signed minimum. Result is stored as unsigned int and returned.
 __device__ unsigned int __vmins4 ( unsigned int a, unsigned int b )

Computes perbyte signed minimum.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function computes signed minimum. Result is stored as unsigned int and returned.
 __device__ unsigned int __vminu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned minimum computation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function computes unsigned minimum. Result is stored as unsigned int and returned.
 __device__ unsigned int __vminu4 ( unsigned int a, unsigned int b )

Computes perbyte unsigned minimum.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function computes unsigned minimum. Result is stored as unsigned int and returned.
 __device__ unsigned int __vneg2 ( unsigned int a )

Computes perhalfword negation.
Returns
Returns computed value.
Description
Splits 4 bytes of argument into 2 parts, each consisting of 2 bytes. For each part function computes negation. Result is stored as unsigned int and returned.
 __device__ unsigned int __vneg4 ( unsigned int a )

Performs perbyte negation.
Returns
Returns computed value.
Description
Splits 4 bytes of argument into 4 parts, each consisting of 1 byte. For each part function computes negation. Result is stored as unsigned int and returned.
 __device__ unsigned int __vnegss2 ( unsigned int a )

Computes perhalfword negation with signed saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of argument into 2 parts, each consisting of 2 bytes. For each part function computes negation. Result is stored as unsigned int and returned.
 __device__ unsigned int __vnegss4 ( unsigned int a )

Performs perbyte negation with signed saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of argument into 4 parts, each consisting of 1 byte. For each part function computes negation. Result is stored as unsigned int and returned.
 __device__ unsigned int __vsads2 ( unsigned int a, unsigned int b )

Performs perhalfword sum of absolute difference of signed.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts functions computes absolute difference and sum it up. Result is stored as unsigned int and returned.
 __device__ unsigned int __vsads4 ( unsigned int a, unsigned int b )

Computes perbyte sum of abs difference of signed.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts functions computes absolute difference and sum it up. Result is stored as unsigned int and returned.
 __device__ unsigned int __vsadu2 ( unsigned int a, unsigned int b )

Computes perhalfword sum of abs diff of unsigned.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function computes absolute differences, and returns sum of those differences.
 __device__ unsigned int __vsadu4 ( unsigned int a, unsigned int b )

Computes perbyte sum af abs difference of unsigned.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function computes absolute differences, and returns sum of those differences.
 __device__ unsigned int __vseteq2 ( unsigned int a, unsigned int b )

Performs perhalfword (un)signed comparison.
Returns
Returns 1 if a = b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part == 'b' part. If both equalities are satisfiad, function returns 1.
 __device__ unsigned int __vseteq4 ( unsigned int a, unsigned int b )

Performs perbyte (un)signed comparison.
Returns
Returns 1 if a = b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part == 'b' part. If both equalities are satisfiad, function returns 1.
 __device__ unsigned int __vsetges2 ( unsigned int a, unsigned int b )

Performs perhalfword signed comparison.
Returns
Returns 1 if a >= b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part >= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetges4 ( unsigned int a, unsigned int b )

Performs perbyte signed comparison.
Returns
Returns 1 if a >= b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part >= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetgeu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned minimum unsigned comparison.
Returns
Returns 1 if a >= b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part >= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetgeu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned comparison.
Returns
Returns 1 if a >= b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part >= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetgts2 ( unsigned int a, unsigned int b )

Performs perhalfword signed comparison.
Returns
Returns 1 if a > b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part > 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetgts4 ( unsigned int a, unsigned int b )

Performs perbyte signed comparison.
Returns
Returns 1 if a > b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part > 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetgtu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned comparison.
Returns
Returns 1 if a > b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part > 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetgtu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned comparison.
Returns
Returns 1 if a > b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part > 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetles2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned minimum computation.
Returns
Returns 1 if a <= b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part <= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetles4 ( unsigned int a, unsigned int b )

Performs perbyte signed comparison.
Returns
Returns 1 if a <= b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part <= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetleu2 ( unsigned int a, unsigned int b )

Performs perhalfword signed comparison.
Returns
Returns 1 if a <= b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part <= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetleu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned comparison.
Returns
Returns 1 if a <= b, else returns 0.
Description
Splits 4 bytes of each argument into 4 part, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part <= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetlts2 ( unsigned int a, unsigned int b )

Performs perhalfword signed comparison.
Returns
Returns 1 if a < b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part <= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetlts4 ( unsigned int a, unsigned int b )

Performs perbyte signed comparison.
Returns
Returns 1 if a < b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part <= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetltu2 ( unsigned int a, unsigned int b )

Performs perhalfword unsigned comparison.
Returns
Returns 1 if a < b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part <= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetltu4 ( unsigned int a, unsigned int b )

Performs perbyte unsigned comparison.
Returns
Returns 1 if a < b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part <= 'b' part. If both inequalities are satisfied, function returns 1.
 __device__ unsigned int __vsetne2 ( unsigned int a, unsigned int b )

Performs perhalfword (un)signed comparison.
Returns
Returns 1 if a != b, else returns 0.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts function performs comparison 'a' part != 'b' part. If both conditions are satisfied, function returns 1.
 __device__ unsigned int __vsetne4 ( unsigned int a, unsigned int b )

Performs perbyte (un)signed comparison.
Returns
Returns 1 if a != b, else returns 0.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts function performs comparison 'a' part != 'b' part. If both conditions are satisfied, function returns 1.
 __device__ unsigned int __vsub2 ( unsigned int a, unsigned int b )

Performs perhalfword (un)signed substraction, with wraparound.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts functions performs substraction. Result is stored as unsigned int and returned.
 __device__ unsigned int __vsub4 ( unsigned int a, unsigned int b )

Performs perbyte substraction.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts functions performs substraction. Result is stored as unsigned int and returned.
 __device__ unsigned int __vsubss2 ( unsigned int a, unsigned int b )

Performs perhalfword (un)signed substraction, with signed saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts functions performs substraction with signed saturation. Result is stored as unsigned int and returned.
 __device__ unsigned int __vsubss4 ( unsigned int a, unsigned int b )

Performs perbyte substraction with signed saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts functions performs substraction with signed saturation. Result is stored as unsigned int and returned.
 __device__ unsigned int __vsubus2 ( unsigned int a, unsigned int b )

Performs perhalfword substraction with unsigned saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 2 parts, each consisting of 2 bytes. For corresponding parts functions performs substraction with unsigned saturation. Result is stored as unsigned int and returned.
 __device__ unsigned int __vsubus4 ( unsigned int a, unsigned int b )

Performs perbyte substraction with unsigned saturation.
Returns
Returns computed value.
Description
Splits 4 bytes of each argument into 4 parts, each consisting of 1 byte. For corresponding parts functions performs substraction with unsigned saturation. Result is stored as unsigned int and returned.