WebAssembly numeric instructions.

Constants

• const

  • : Declare a constant number.

Comparison

• eq

  • : Check if two numbers are equal.

  eqz

  • : Check if a number is equal to 0.

  ne

  • : Check if two numbers are not equal.

  gt

  • : Check if a floating point number is greater than another floating point number.

  gt_s

  • : Check if a signed integer is greater than another signed integer.

  gt_u

  • : Check if an unsigned integer is greater than another unsigned integer.

  lt

  • : Check if a floating point number is less than another floating point number.

  lt_s

  • : Check if a signed integer is less than another signed integer.

  lt_u

  • : Check if an unsigned integer is less than another unsigned integer.

  ge

  • : Check if a floating point number is greater than or equal to another floating point number.

  ge_s

  • : Check if a signed integer is greater than or equal to another signed integer.

  ge_u

  • : Check if an unsigned integer is greater than or equal to another unsigned integer.

  le

  • : Check if a floating point number is less than or equal to another floating point number.

  le_s

  • : Check if a signed integer is less than or equal to another signed integer.

  le_u

  • : Check if an unsigned integer is less than or equal to another unsigned integer.

Arithmetic

• add

  • : Add up two numbers.

  sub

  • : Subtract one number from another number.

  mul

  • : Multiply one number by another number.

  div

  • : Divide one number by another number.

  rem

  • : Calculate the remainder left over when one integer is divided by another integer.

Conversion

• extend

  • : Convert (extend) i32 to i64.

  wrap_i64

  • : Convert (wrap) i64 to i32.

  promote_32

  • : Convert (promote) f32 to f64.

  demote

  • : Convert (demote) f64 to f32.

  convert

  • : Convert integers to floating points.

  trunc

  • : Gets the value of a floating point number without its fractional part.

  trunc_f32_s

  • : Removes the fractional part of an f32 value and outputs it as a signed integer.

  trunc_f32_u

  • : Removes the fractional part of an f32 value and outputs it as an unsigned integer.

  trunc_f64_s

  • : Removes the fractional part of an f64 value and outputs it as a signed integer.

  trunc_f64_u

  • : Removes the fractional part of an f64 value and outputs it as an unsigned integer.

  reinterpret

  • : Reinterpret the bytes of integers as floating points and vice versa.

Floating point specific instructions

• min

  • : Get the lower of two numbers.

  max

  • : Get the higher of two floating point numbers.

  nearest

  • : Round a number to the nearest integer.

  ceil

  • : Round up a number.

  floor

  • : Round down a number.

  trunc

  • : Discard the fractional part of a number.

  abs

  • : Get the absolute value of a number.

  neg

  • : Negate a number.

  sqrt

  • : Get the square root of a number.

  copysign

  • : Copy just the sign bit from one number to another.

Bitwise

• and

  • : Used for performing a bitwise AND.

  or

  • : Used for performing a bitwise OR.

  xor

  • : Used for performing a bitwise XOR.

  shl

  • : Used for performing a bitwise left-shift.

  shr_s

  • : Used for performing a bitwise right-shift on signed integers.

  shr_u

  • : Used for performing a bitwise right-shift on unsigned integers.

  rotl

  • : Used for performing a bitwise left-rotate.

  rotr

  • : Used for performing a bitwise right-rotate.

  clz

  • : Count the amount of leading zeros in a numbers binary representation.

  ctz

  • : Count the amount of trailing zeros in a numbers binary representation.

  popcnt

  • : Count the total amount of 1s in a numbers binary representation.

Sign extension operations

• extend8_s

  • : Sign-extend the low 8 bits of an integer to propagate its sign throughout the entire value.

  extend16_s

  • : Sign-extend the low 16 bits of an integer to propagate its sign throughout the entire value.

  extend32_s

  • : Sign-extend the low 32 bits of a 64-bit integer to propagate its sign throughout the entire value.