WebAssembly numeric instructions

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.