Instructions¶
Instructions are encoded by opcodes. Each opcode is represented by a single byte, and is followed by the instruction’s immediate arguments, where present. The only exception are structured control instructions, which consist of several opcodes bracketing their nested instruction sequences.
Note
Gaps in the byte code ranges for encoding instructions are reserved for future extensions.
Control Instructions¶
Control instructions have varying encodings. For structured instructions, the instruction sequences forming nested blocks are terminated with explicit opcodes for \(\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{end}}\) and \(\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{else}}\).
Block types are encoded in special compressed form, by either the byte \(\def\mathdef684#1{\mathtt{0x#1}}\mathdef684{40}\) indicating the empty type, as a single value type, or as a type index encoded as a positive signed integer.
\[\begin{split}\begin{array}{llcllll}
\def\mathdef647#1{{}}\mathdef647{block type} & \href{../binary/instructions.html#binary-blocktype}{\mathtt{blocktype}} &::=&
\def\mathdef685#1{\mathtt{0x#1}}\mathdef685{40} &\Rightarrow& \epsilon \\ &&|&
t{:}\href{../binary/types.html#binary-valtype}{\mathtt{valtype}} &\Rightarrow& t \\ &&|&
x{:}\href{../binary/values.html#binary-int}{\def\mathdef657#1{{\mathtt{s}#1}}\mathdef657{\mathtt{33}}} &\Rightarrow& x & (\mathrel{\mbox{if}} x \geq 0) \\
\def\mathdef647#1{{}}\mathdef647{instruction} & \href{../binary/instructions.html#binary-instr}{\mathtt{instr}} &::=&
\def\mathdef686#1{\mathtt{0x#1}}\mathdef686{00} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{unreachable}} \\ &&|&
\def\mathdef687#1{\mathtt{0x#1}}\mathdef687{01} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{nop}} \\ &&|&
\def\mathdef688#1{\mathtt{0x#1}}\mathdef688{02}~~\mathit{bt}{:}\href{../binary/instructions.html#binary-blocktype}{\mathtt{blocktype}}~~(\mathit{in}{:}\href{../binary/instructions.html#binary-instr}{\mathtt{instr}})^\ast~~\def\mathdef689#1{\mathtt{0x#1}}\mathdef689{0B}
&\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{block}}~\mathit{bt}~\mathit{in}^\ast~\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{end}} \\ &&|&
\def\mathdef690#1{\mathtt{0x#1}}\mathdef690{03}~~\mathit{bt}{:}\href{../binary/instructions.html#binary-blocktype}{\mathtt{blocktype}}~~(\mathit{in}{:}\href{../binary/instructions.html#binary-instr}{\mathtt{instr}})^\ast~~\def\mathdef691#1{\mathtt{0x#1}}\mathdef691{0B}
&\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{loop}}~\mathit{bt}~\mathit{in}^\ast~\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{end}} \\ &&|&
\def\mathdef692#1{\mathtt{0x#1}}\mathdef692{04}~~\mathit{bt}{:}\href{../binary/instructions.html#binary-blocktype}{\mathtt{blocktype}}~~(\mathit{in}{:}\href{../binary/instructions.html#binary-instr}{\mathtt{instr}})^\ast~~\def\mathdef693#1{\mathtt{0x#1}}\mathdef693{0B}
&\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{if}}~\mathit{bt}~\mathit{in}^\ast~\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{else}}~\epsilon~\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{end}} \\ &&|&
\def\mathdef694#1{\mathtt{0x#1}}\mathdef694{04}~~\mathit{bt}{:}\href{../binary/instructions.html#binary-blocktype}{\mathtt{blocktype}}~~(\mathit{in}_1{:}\href{../binary/instructions.html#binary-instr}{\mathtt{instr}})^\ast~~
\def\mathdef695#1{\mathtt{0x#1}}\mathdef695{05}~~(\mathit{in}_2{:}\href{../binary/instructions.html#binary-instr}{\mathtt{instr}})^\ast~~\def\mathdef696#1{\mathtt{0x#1}}\mathdef696{0B}
&\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{if}}~\mathit{bt}~\mathit{in}_1^\ast~\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{else}}~\mathit{in}_2^\ast~\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{end}} \\ &&|&
\def\mathdef697#1{\mathtt{0x#1}}\mathdef697{0C}~~l{:}\href{../binary/modules.html#binary-labelidx}{\mathtt{labelidx}} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{br}}~l \\ &&|&
\def\mathdef698#1{\mathtt{0x#1}}\mathdef698{0D}~~l{:}\href{../binary/modules.html#binary-labelidx}{\mathtt{labelidx}} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{br\_if}}~l \\ &&|&
\def\mathdef699#1{\mathtt{0x#1}}\mathdef699{0E}~~l^\ast{:}\href{../binary/conventions.html#binary-vec}{\mathtt{vec}}(\href{../binary/modules.html#binary-labelidx}{\mathtt{labelidx}})~~l_N{:}\href{../binary/modules.html#binary-labelidx}{\mathtt{labelidx}}
&\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{br\_table}}~l^\ast~l_N \\ &&|&
\def\mathdef700#1{\mathtt{0x#1}}\mathdef700{0F} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{return}} \\ &&|&
\def\mathdef701#1{\mathtt{0x#1}}\mathdef701{10}~~x{:}\href{../binary/modules.html#binary-funcidx}{\mathtt{funcidx}} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{call}}~x \\ &&|&
\def\mathdef702#1{\mathtt{0x#1}}\mathdef702{11}~~x{:}\href{../binary/modules.html#binary-typeidx}{\mathtt{typeidx}}~~\def\mathdef703#1{\mathtt{0x#1}}\mathdef703{00} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-control}{\mathsf{call\_indirect}}~x \\
\end{array}\end{split}\]
Note
The \(\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{else}}\) opcode \(\def\mathdef704#1{\mathtt{0x#1}}\mathdef704{05}\) in the encoding of an \(\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{if}}\) instruction can be omitted if the following instruction sequence is empty.
Unlike any other occurrence, the type index in a block type is encoded as a positive signed integer, so that its signed LEB128 bit pattern cannot collide with the encoding of value types or the special code \(\def\mathdef705#1{\mathtt{0x#1}}\mathdef705{40}\), which correspond to the LEB128 encoding of negative integers. To avoid any loss in the range of allowed indices, it is treated as a 33 bit signed integer.
In future versions of WebAssembly, the zero byte occurring in the encoding of the \(\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{call\_indirect}}\) instruction may be used to index additional tables.
Parametric Instructions¶
Parametric instructions are represented by single byte codes.
\[\begin{split}\begin{array}{llclll}
\def\mathdef647#1{{}}\mathdef647{instruction} & \href{../binary/instructions.html#binary-instr}{\mathtt{instr}} &::=& \dots \\ &&|&
\def\mathdef706#1{\mathtt{0x#1}}\mathdef706{1A} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-parametric}{\mathsf{drop}} \\ &&|&
\def\mathdef707#1{\mathtt{0x#1}}\mathdef707{1B} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-parametric}{\mathsf{select}} \\
\end{array}\end{split}\]
Variable Instructions¶
Variable instructions are represented by byte codes followed by the encoding of the respective index.
\[\begin{split}\begin{array}{llclll}
\def\mathdef647#1{{}}\mathdef647{instruction} & \href{../binary/instructions.html#binary-instr}{\mathtt{instr}} &::=& \dots \\ &&|&
\def\mathdef708#1{\mathtt{0x#1}}\mathdef708{20}~~x{:}\href{../binary/modules.html#binary-localidx}{\mathtt{localidx}} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-variable}{\mathsf{local.get}}~x \\ &&|&
\def\mathdef709#1{\mathtt{0x#1}}\mathdef709{21}~~x{:}\href{../binary/modules.html#binary-localidx}{\mathtt{localidx}} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-variable}{\mathsf{local.set}}~x \\ &&|&
\def\mathdef710#1{\mathtt{0x#1}}\mathdef710{22}~~x{:}\href{../binary/modules.html#binary-localidx}{\mathtt{localidx}} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-variable}{\mathsf{local.tee}}~x \\ &&|&
\def\mathdef711#1{\mathtt{0x#1}}\mathdef711{23}~~x{:}\href{../binary/modules.html#binary-globalidx}{\mathtt{globalidx}} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-variable}{\mathsf{global.get}}~x \\ &&|&
\def\mathdef712#1{\mathtt{0x#1}}\mathdef712{24}~~x{:}\href{../binary/modules.html#binary-globalidx}{\mathtt{globalidx}} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-variable}{\mathsf{global.set}}~x \\
\end{array}\end{split}\]
Memory Instructions¶
Each variant of memory instruction is encoded with a different byte code. Loads and stores are followed by the encoding of their \(\href{../syntax/instructions.html#syntax-memarg}{\mathit{memarg}}\) immediate.
\[\begin{split}\begin{array}{llclll}
\def\mathdef647#1{{}}\mathdef647{memory argument} & \href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &::=&
a{:}\href{../binary/values.html#binary-int}{\def\mathdef652#1{{\mathtt{u}#1}}\mathdef652{\mathtt{32}}}~~o{:}\href{../binary/values.html#binary-int}{\def\mathdef652#1{{\mathtt{u}#1}}\mathdef652{\mathtt{32}}} &\Rightarrow& \{ \href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{align}}~a,~\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{offset}}~o \} \\
\def\mathdef647#1{{}}\mathdef647{instruction} & \href{../binary/instructions.html#binary-instr}{\mathtt{instr}} &::=& \dots \\ &&|&
\def\mathdef713#1{\mathtt{0x#1}}\mathdef713{28}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}~m \\ &&|&
\def\mathdef714#1{\mathtt{0x#1}}\mathdef714{29}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}~m \\ &&|&
\def\mathdef715#1{\mathtt{0x#1}}\mathdef715{2A}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}~m \\ &&|&
\def\mathdef716#1{\mathtt{0x#1}}\mathdef716{2B}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}~m \\ &&|&
\def\mathdef717#1{\mathtt{0x#1}}\mathdef717{2C}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{8\_s}~m \\ &&|&
\def\mathdef718#1{\mathtt{0x#1}}\mathdef718{2D}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{8\_u}~m \\ &&|&
\def\mathdef719#1{\mathtt{0x#1}}\mathdef719{2E}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{16\_s}~m \\ &&|&
\def\mathdef720#1{\mathtt{0x#1}}\mathdef720{2F}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{16\_u}~m \\ &&|&
\def\mathdef721#1{\mathtt{0x#1}}\mathdef721{30}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{8\_s}~m \\ &&|&
\def\mathdef722#1{\mathtt{0x#1}}\mathdef722{31}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{8\_u}~m \\ &&|&
\def\mathdef723#1{\mathtt{0x#1}}\mathdef723{32}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{16\_s}~m \\ &&|&
\def\mathdef724#1{\mathtt{0x#1}}\mathdef724{33}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{16\_u}~m \\ &&|&
\def\mathdef725#1{\mathtt{0x#1}}\mathdef725{34}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{32\_s}~m \\ &&|&
\def\mathdef726#1{\mathtt{0x#1}}\mathdef726{35}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{load}}\mathsf{32\_u}~m \\ &&|&
\def\mathdef727#1{\mathtt{0x#1}}\mathdef727{36}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}~m \\ &&|&
\def\mathdef728#1{\mathtt{0x#1}}\mathdef728{37}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}~m \\ &&|&
\def\mathdef729#1{\mathtt{0x#1}}\mathdef729{38}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}~m \\ &&|&
\def\mathdef730#1{\mathtt{0x#1}}\mathdef730{39}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}~m \\ &&|&
\def\mathdef731#1{\mathtt{0x#1}}\mathdef731{3A}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}\mathsf{8}~m \\ &&|&
\def\mathdef732#1{\mathtt{0x#1}}\mathdef732{3B}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}\mathsf{16}~m \\ &&|&
\def\mathdef733#1{\mathtt{0x#1}}\mathdef733{3C}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}\mathsf{8}~m \\ &&|&
\def\mathdef734#1{\mathtt{0x#1}}\mathdef734{3D}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}\mathsf{16}~m \\ &&|&
\def\mathdef735#1{\mathtt{0x#1}}\mathdef735{3E}~~m{:}\href{../binary/instructions.html#binary-memarg}{\mathtt{memarg}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{store}}\mathsf{32}~m \\ &&|&
\def\mathdef736#1{\mathtt{0x#1}}\mathdef736{3F}~~\def\mathdef737#1{\mathtt{0x#1}}\mathdef737{00} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{memory.size}} \\ &&|&
\def\mathdef738#1{\mathtt{0x#1}}\mathdef738{40}~~\def\mathdef739#1{\mathtt{0x#1}}\mathdef739{00} &\Rightarrow& \href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{memory.grow}} \\
\end{array}\end{split}\]
Note
In future versions of WebAssembly, the additional zero bytes occurring in the encoding of the \(\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{memory.size}}\) and \(\href{../syntax/instructions.html#syntax-instr-memory}{\mathsf{memory.grow}}\) instructions may be used to index additional memories.
Numeric Instructions¶
All variants of numeric instructions are represented by separate byte codes.
The \(\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{const}}\) instructions are followed by the respective literal.
\[\begin{split}\begin{array}{llclll}
\def\mathdef647#1{{}}\mathdef647{instruction} & \href{../binary/instructions.html#binary-instr}{\mathtt{instr}} &::=& \dots \\&&|&
\def\mathdef740#1{\mathtt{0x#1}}\mathdef740{41}~~n{:}\href{../binary/values.html#binary-int}{\def\mathdef660#1{{\mathtt{i}#1}}\mathdef660{\mathtt{32}}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{const}}~n \\ &&|&
\def\mathdef741#1{\mathtt{0x#1}}\mathdef741{42}~~n{:}\href{../binary/values.html#binary-int}{\def\mathdef661#1{{\mathtt{i}#1}}\mathdef661{\mathtt{64}}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{const}}~n \\ &&|&
\def\mathdef742#1{\mathtt{0x#1}}\mathdef742{43}~~z{:}\href{../binary/values.html#binary-float}{\def\mathdef663#1{{\mathtt{f}#1}}\mathdef663{\mathtt{32}}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{const}}~z \\ &&|&
\def\mathdef743#1{\mathtt{0x#1}}\mathdef743{44}~~z{:}\href{../binary/values.html#binary-float}{\def\mathdef664#1{{\mathtt{f}#1}}\mathdef664{\mathtt{64}}} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{const}}~z \\
\end{array}\end{split}\]
All other numeric instructions are plain opcodes without any immediates.
\[\begin{split}\begin{array}{llclll}
\def\mathdef647#1{{}}\mathdef647{instruction} & \href{../binary/instructions.html#binary-instr}{\mathtt{instr}} &::=& \dots && \phantom{thisshouldbeenough} \\&&|&
\def\mathdef744#1{\mathtt{0x#1}}\mathdef744{45} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{eqz}} \\ &&|&
\def\mathdef745#1{\mathtt{0x#1}}\mathdef745{46} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{eq}} \\ &&|&
\def\mathdef746#1{\mathtt{0x#1}}\mathdef746{47} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ne}} \\ &&|&
\def\mathdef747#1{\mathtt{0x#1}}\mathdef747{48} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{lt}}\mathsf{\_s} \\ &&|&
\def\mathdef748#1{\mathtt{0x#1}}\mathdef748{49} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{lt}}\mathsf{\_u} \\ &&|&
\def\mathdef749#1{\mathtt{0x#1}}\mathdef749{4A} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{gt}}\mathsf{\_s} \\ &&|&
\def\mathdef750#1{\mathtt{0x#1}}\mathdef750{4B} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{gt}}\mathsf{\_u} \\ &&|&
\def\mathdef751#1{\mathtt{0x#1}}\mathdef751{4C} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{le}}\mathsf{\_s} \\ &&|&
\def\mathdef752#1{\mathtt{0x#1}}\mathdef752{4D} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{le}}\mathsf{\_u} \\ &&|&
\def\mathdef753#1{\mathtt{0x#1}}\mathdef753{4E} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ge}}\mathsf{\_s} \\ &&|&
\def\mathdef754#1{\mathtt{0x#1}}\mathdef754{4F} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ge}}\mathsf{\_u} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef755#1{\mathtt{0x#1}}\mathdef755{50} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{eqz}} \\ &&|&
\def\mathdef756#1{\mathtt{0x#1}}\mathdef756{51} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{eq}} \\ &&|&
\def\mathdef757#1{\mathtt{0x#1}}\mathdef757{52} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ne}} \\ &&|&
\def\mathdef758#1{\mathtt{0x#1}}\mathdef758{53} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{lt}}\mathsf{\_s} \\ &&|&
\def\mathdef759#1{\mathtt{0x#1}}\mathdef759{54} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{lt}}\mathsf{\_u} \\ &&|&
\def\mathdef760#1{\mathtt{0x#1}}\mathdef760{55} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{gt}}\mathsf{\_s} \\ &&|&
\def\mathdef761#1{\mathtt{0x#1}}\mathdef761{56} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{gt}}\mathsf{\_u} \\ &&|&
\def\mathdef762#1{\mathtt{0x#1}}\mathdef762{57} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{le}}\mathsf{\_s} \\ &&|&
\def\mathdef763#1{\mathtt{0x#1}}\mathdef763{58} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{le}}\mathsf{\_u} \\ &&|&
\def\mathdef764#1{\mathtt{0x#1}}\mathdef764{59} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ge}}\mathsf{\_s} \\ &&|&
\def\mathdef765#1{\mathtt{0x#1}}\mathdef765{5A} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ge}}\mathsf{\_u} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef766#1{\mathtt{0x#1}}\mathdef766{5B} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{eq}} \\ &&|&
\def\mathdef767#1{\mathtt{0x#1}}\mathdef767{5C} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ne}} \\ &&|&
\def\mathdef768#1{\mathtt{0x#1}}\mathdef768{5D} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{lt}} \\ &&|&
\def\mathdef769#1{\mathtt{0x#1}}\mathdef769{5E} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{gt}} \\ &&|&
\def\mathdef770#1{\mathtt{0x#1}}\mathdef770{5F} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{le}} \\ &&|&
\def\mathdef771#1{\mathtt{0x#1}}\mathdef771{60} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ge}} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef772#1{\mathtt{0x#1}}\mathdef772{61} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{eq}} \\ &&|&
\def\mathdef773#1{\mathtt{0x#1}}\mathdef773{62} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ne}} \\ &&|&
\def\mathdef774#1{\mathtt{0x#1}}\mathdef774{63} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{lt}} \\ &&|&
\def\mathdef775#1{\mathtt{0x#1}}\mathdef775{64} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{gt}} \\ &&|&
\def\mathdef776#1{\mathtt{0x#1}}\mathdef776{65} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{le}} \\ &&|&
\def\mathdef777#1{\mathtt{0x#1}}\mathdef777{66} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ge}} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef778#1{\mathtt{0x#1}}\mathdef778{67} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{clz}} \\ &&|&
\def\mathdef779#1{\mathtt{0x#1}}\mathdef779{68} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ctz}} \\ &&|&
\def\mathdef780#1{\mathtt{0x#1}}\mathdef780{69} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{popcnt}} \\ &&|&
\def\mathdef781#1{\mathtt{0x#1}}\mathdef781{6A} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{add}} \\ &&|&
\def\mathdef782#1{\mathtt{0x#1}}\mathdef782{6B} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{sub}} \\ &&|&
\def\mathdef783#1{\mathtt{0x#1}}\mathdef783{6C} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{mul}} \\ &&|&
\def\mathdef784#1{\mathtt{0x#1}}\mathdef784{6D} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{div}}\mathsf{\_s} \\ &&|&
\def\mathdef785#1{\mathtt{0x#1}}\mathdef785{6E} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{div}}\mathsf{\_u} \\ &&|&
\def\mathdef786#1{\mathtt{0x#1}}\mathdef786{6F} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{rem}}\mathsf{\_s} \\ &&|&
\def\mathdef787#1{\mathtt{0x#1}}\mathdef787{70} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{rem}}\mathsf{\_u} \\ &&|&
\def\mathdef788#1{\mathtt{0x#1}}\mathdef788{71} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{and}} \\ &&|&
\def\mathdef789#1{\mathtt{0x#1}}\mathdef789{72} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{or}} \\ &&|&
\def\mathdef790#1{\mathtt{0x#1}}\mathdef790{73} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{xor}} \\ &&|&
\def\mathdef791#1{\mathtt{0x#1}}\mathdef791{74} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{shl}} \\ &&|&
\def\mathdef792#1{\mathtt{0x#1}}\mathdef792{75} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{shr}}\mathsf{\_s} \\ &&|&
\def\mathdef793#1{\mathtt{0x#1}}\mathdef793{76} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{shr}}\mathsf{\_u} \\ &&|&
\def\mathdef794#1{\mathtt{0x#1}}\mathdef794{77} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{rotl}} \\ &&|&
\def\mathdef795#1{\mathtt{0x#1}}\mathdef795{78} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{rotr}} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef796#1{\mathtt{0x#1}}\mathdef796{79} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{clz}} \\ &&|&
\def\mathdef797#1{\mathtt{0x#1}}\mathdef797{7A} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ctz}} \\ &&|&
\def\mathdef798#1{\mathtt{0x#1}}\mathdef798{7B} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{popcnt}} \\ &&|&
\def\mathdef799#1{\mathtt{0x#1}}\mathdef799{7C} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{add}} \\ &&|&
\def\mathdef800#1{\mathtt{0x#1}}\mathdef800{7D} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{sub}} \\ &&|&
\def\mathdef801#1{\mathtt{0x#1}}\mathdef801{7E} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{mul}} \\ &&|&
\def\mathdef802#1{\mathtt{0x#1}}\mathdef802{7F} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{div}}\mathsf{\_s} \\ &&|&
\def\mathdef803#1{\mathtt{0x#1}}\mathdef803{80} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{div}}\mathsf{\_u} \\ &&|&
\def\mathdef804#1{\mathtt{0x#1}}\mathdef804{81} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{rem}}\mathsf{\_s} \\ &&|&
\def\mathdef805#1{\mathtt{0x#1}}\mathdef805{82} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{rem}}\mathsf{\_u} \\ &&|&
\def\mathdef806#1{\mathtt{0x#1}}\mathdef806{83} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{and}} \\ &&|&
\def\mathdef807#1{\mathtt{0x#1}}\mathdef807{84} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{or}} \\ &&|&
\def\mathdef808#1{\mathtt{0x#1}}\mathdef808{85} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{xor}} \\ &&|&
\def\mathdef809#1{\mathtt{0x#1}}\mathdef809{86} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{shl}} \\ &&|&
\def\mathdef810#1{\mathtt{0x#1}}\mathdef810{87} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{shr}}\mathsf{\_s} \\ &&|&
\def\mathdef811#1{\mathtt{0x#1}}\mathdef811{88} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{shr}}\mathsf{\_u} \\ &&|&
\def\mathdef812#1{\mathtt{0x#1}}\mathdef812{89} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{rotl}} \\ &&|&
\def\mathdef813#1{\mathtt{0x#1}}\mathdef813{8A} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{rotr}} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef814#1{\mathtt{0x#1}}\mathdef814{8B} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{abs}} \\ &&|&
\def\mathdef815#1{\mathtt{0x#1}}\mathdef815{8C} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{neg}} \\ &&|&
\def\mathdef816#1{\mathtt{0x#1}}\mathdef816{8D} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ceil}} \\ &&|&
\def\mathdef817#1{\mathtt{0x#1}}\mathdef817{8E} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{floor}} \\ &&|&
\def\mathdef818#1{\mathtt{0x#1}}\mathdef818{8F} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}} \\ &&|&
\def\mathdef819#1{\mathtt{0x#1}}\mathdef819{90} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{nearest}} \\ &&|&
\def\mathdef820#1{\mathtt{0x#1}}\mathdef820{91} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{sqrt}} \\ &&|&
\def\mathdef821#1{\mathtt{0x#1}}\mathdef821{92} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{add}} \\ &&|&
\def\mathdef822#1{\mathtt{0x#1}}\mathdef822{93} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{sub}} \\ &&|&
\def\mathdef823#1{\mathtt{0x#1}}\mathdef823{94} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{mul}} \\ &&|&
\def\mathdef824#1{\mathtt{0x#1}}\mathdef824{95} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{div}} \\ &&|&
\def\mathdef825#1{\mathtt{0x#1}}\mathdef825{96} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{min}} \\ &&|&
\def\mathdef826#1{\mathtt{0x#1}}\mathdef826{97} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{max}} \\ &&|&
\def\mathdef827#1{\mathtt{0x#1}}\mathdef827{98} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{copysign}} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef828#1{\mathtt{0x#1}}\mathdef828{99} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{abs}} \\ &&|&
\def\mathdef829#1{\mathtt{0x#1}}\mathdef829{9A} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{neg}} \\ &&|&
\def\mathdef830#1{\mathtt{0x#1}}\mathdef830{9B} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{ceil}} \\ &&|&
\def\mathdef831#1{\mathtt{0x#1}}\mathdef831{9C} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{floor}} \\ &&|&
\def\mathdef832#1{\mathtt{0x#1}}\mathdef832{9D} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}} \\ &&|&
\def\mathdef833#1{\mathtt{0x#1}}\mathdef833{9E} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{nearest}} \\ &&|&
\def\mathdef834#1{\mathtt{0x#1}}\mathdef834{9F} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{sqrt}} \\ &&|&
\def\mathdef835#1{\mathtt{0x#1}}\mathdef835{A0} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{add}} \\ &&|&
\def\mathdef836#1{\mathtt{0x#1}}\mathdef836{A1} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{sub}} \\ &&|&
\def\mathdef837#1{\mathtt{0x#1}}\mathdef837{A2} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{mul}} \\ &&|&
\def\mathdef838#1{\mathtt{0x#1}}\mathdef838{A3} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{div}} \\ &&|&
\def\mathdef839#1{\mathtt{0x#1}}\mathdef839{A4} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{min}} \\ &&|&
\def\mathdef840#1{\mathtt{0x#1}}\mathdef840{A5} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{max}} \\ &&|&
\def\mathdef841#1{\mathtt{0x#1}}\mathdef841{A6} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{copysign}} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef842#1{\mathtt{0x#1}}\mathdef842{A7} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{wrap}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i64}} \\ &&|&
\def\mathdef843#1{\mathtt{0x#1}}\mathdef843{A8} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}\mathsf{\_s} \\ &&|&
\def\mathdef844#1{\mathtt{0x#1}}\mathdef844{A9} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}\mathsf{\_u} \\ &&|&
\def\mathdef845#1{\mathtt{0x#1}}\mathdef845{AA} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}\mathsf{\_s} \\ &&|&
\def\mathdef846#1{\mathtt{0x#1}}\mathdef846{AB} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}\mathsf{\_u} \\ &&|&
\def\mathdef847#1{\mathtt{0x#1}}\mathdef847{AC} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{extend}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}\mathsf{\_s} \\ &&|&
\def\mathdef848#1{\mathtt{0x#1}}\mathdef848{AD} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{extend}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}\mathsf{\_u} \\ &&|&
\def\mathdef849#1{\mathtt{0x#1}}\mathdef849{AE} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}\mathsf{\_s} \\ &&|&
\def\mathdef850#1{\mathtt{0x#1}}\mathdef850{AF} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}\mathsf{\_u} \\ &&|&
\def\mathdef851#1{\mathtt{0x#1}}\mathdef851{B0} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}\mathsf{\_s} \\ &&|&
\def\mathdef852#1{\mathtt{0x#1}}\mathdef852{B1} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}\mathsf{\_u} \\ &&|&
\def\mathdef853#1{\mathtt{0x#1}}\mathdef853{B2} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{convert}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}\mathsf{\_s} \\ &&|&
\def\mathdef854#1{\mathtt{0x#1}}\mathdef854{B3} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{convert}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}\mathsf{\_u} \\ &&|&
\def\mathdef855#1{\mathtt{0x#1}}\mathdef855{B4} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{convert}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}\mathsf{\_s} \\ &&|&
\def\mathdef856#1{\mathtt{0x#1}}\mathdef856{B5} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{convert}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}\mathsf{\_u} \\ &&|&
\def\mathdef857#1{\mathtt{0x#1}}\mathdef857{B6} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{demote}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}} \\ &&|&
\def\mathdef858#1{\mathtt{0x#1}}\mathdef858{B7} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{convert}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}\mathsf{\_s} \\ &&|&
\def\mathdef859#1{\mathtt{0x#1}}\mathdef859{B8} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{convert}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}\mathsf{\_u} \\ &&|&
\def\mathdef860#1{\mathtt{0x#1}}\mathdef860{B9} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{convert}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}\mathsf{\_s} \\ &&|&
\def\mathdef861#1{\mathtt{0x#1}}\mathdef861{BA} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{convert}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}\mathsf{\_u} \\ &&|&
\def\mathdef862#1{\mathtt{0x#1}}\mathdef862{BB} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{promote}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}} \\ &&|&
\def\mathdef863#1{\mathtt{0x#1}}\mathdef863{BC} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{reinterpret}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}} \\ &&|&
\def\mathdef864#1{\mathtt{0x#1}}\mathdef864{BD} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{reinterpret}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}} \\ &&|&
\def\mathdef865#1{\mathtt{0x#1}}\mathdef865{BE} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{reinterpret}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i32}} \\ &&|&
\def\mathdef866#1{\mathtt{0x#1}}\mathdef866{BF} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{reinterpret}}\mathsf{\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{i64}} \\
\end{array}\end{split}\]
The saturating truncation instructions all have a one byte prefix.
\[\begin{split}\begin{array}{llclll}
\def\mathdef647#1{{}}\mathdef647{instruction} & \href{../binary/instructions.html#binary-instr}{\mathtt{instr}} &::=& \dots && \phantom{thisshouldbeenough} \\&&|&
\def\mathdef867#1{\mathtt{0x#1}}\mathdef867{FC}~\def\mathdef868#1{\mathtt{0x#1}}\mathdef868{00} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_sat\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}\mathsf{\_s} \\ &&|&
\def\mathdef869#1{\mathtt{0x#1}}\mathdef869{FC}~\def\mathdef870#1{\mathtt{0x#1}}\mathdef870{01} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_sat\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}\mathsf{\_u} \\ &&|&
\def\mathdef871#1{\mathtt{0x#1}}\mathdef871{FC}~\def\mathdef872#1{\mathtt{0x#1}}\mathdef872{02} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_sat\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}\mathsf{\_s} \\ &&|&
\def\mathdef873#1{\mathtt{0x#1}}\mathdef873{FC}~\def\mathdef874#1{\mathtt{0x#1}}\mathdef874{03} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_sat\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}\mathsf{\_u} \\ &&|&
\def\mathdef875#1{\mathtt{0x#1}}\mathdef875{FC}~\def\mathdef876#1{\mathtt{0x#1}}\mathdef876{04} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_sat\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}\mathsf{\_s} \\ &&|&
\def\mathdef877#1{\mathtt{0x#1}}\mathdef877{FC}~\def\mathdef878#1{\mathtt{0x#1}}\mathdef878{05} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_sat\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f32}}\mathsf{\_u} \\ &&|&
\def\mathdef879#1{\mathtt{0x#1}}\mathdef879{FC}~\def\mathdef880#1{\mathtt{0x#1}}\mathdef880{06} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_sat\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}\mathsf{\_s} \\ &&|&
\def\mathdef881#1{\mathtt{0x#1}}\mathdef881{FC}~\def\mathdef882#1{\mathtt{0x#1}}\mathdef882{07} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{trunc}}\mathsf{\_sat\_}\href{../syntax/types.html#syntax-valtype}{\mathsf{f64}}\mathsf{\_u} \\
\end{array}\end{split}\]
\[\begin{split}\begin{array}{llclll}
\phantom{\def\mathdef647#1{{}}\mathdef647{instruction}} & \phantom{\href{../binary/instructions.html#binary-instr}{\mathtt{instr}}} &\phantom{::=}& \phantom{\dots} && \phantom{thisshouldbeenough} \\[-2ex] &&|&
\def\mathdef883#1{\mathtt{0x#1}}\mathdef883{C0} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{extend}}\mathsf{8\_s} \\ &&|&
\def\mathdef884#1{\mathtt{0x#1}}\mathdef884{C1} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i32}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{extend}}\mathsf{16\_s} \\ &&|&
\def\mathdef885#1{\mathtt{0x#1}}\mathdef885{C2} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{extend}}\mathsf{8\_s} \\ &&|&
\def\mathdef886#1{\mathtt{0x#1}}\mathdef886{C3} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{extend}}\mathsf{16\_s} \\ &&|&
\def\mathdef887#1{\mathtt{0x#1}}\mathdef887{C4} &\Rightarrow& \href{../syntax/types.html#syntax-valtype}{\mathsf{i64}}.\href{../syntax/instructions.html#syntax-instr-numeric}{\mathsf{extend}}\mathsf{32\_s} \\
\end{array}\end{split}\]
Expressions¶
Expressions are encoded by their instruction sequence terminated with an explicit \(\def\mathdef888#1{\mathtt{0x#1}}\mathdef888{0B}\) opcode for \(\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{end}}\).
\[\begin{split}\begin{array}{llclll}
\def\mathdef647#1{{}}\mathdef647{expression} & \href{../binary/instructions.html#binary-expr}{\mathtt{expr}} &::=&
(\mathit{in}{:}\href{../binary/instructions.html#binary-instr}{\mathtt{instr}})^\ast~~\def\mathdef889#1{\mathtt{0x#1}}\mathdef889{0B} &\Rightarrow& \mathit{in}^\ast~\href{../syntax/instructions.html#syntax-instr-control}{\mathsf{end}} \\
\end{array}\end{split}\]