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rossberg merged 1 commit into from
Sep 8, 2026
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[spec] Add load rules missing from document #2247

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18 changes: 9 additions & 9 deletions document/core/appendix/index-instructions.py
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Expand Up @@ -117,10 +117,10 @@ def Instruction(version, name, opcode, type=None, validation=None, execution=Non
Instruction(2.0, r'\TABLEGET~x', r'\hex{25}', r'[\X{at}] \to [t]', r'valid-table.get', r'exec-table.get'),
Instruction(2.0, r'\TABLESET~x', r'\hex{26}', r'[\X{at}~t] \to []', r'valid-table.set', r'exec-table.set'),
Instruction(0.0, None, r'\hex{27}'),
Instruction(1.0, r'\I32.\LOAD~x~\memarg', r'\hex{28}', r'[\X{at}] \to [\I32]', r'valid-load-val', r'exec-load-val'),
Instruction(1.0, r'\I64.\LOAD~x~\memarg', r'\hex{29}', r'[\X{at}] \to [\I64]', r'valid-load-val', r'exec-load-val'),
Instruction(1.0, r'\F32.\LOAD~x~\memarg', r'\hex{2A}', r'[\X{at}] \to [\F32]', r'valid-load-val', r'exec-load-val'),
Instruction(1.0, r'\F64.\LOAD~x~\memarg', r'\hex{2B}', r'[\X{at}] \to [\F64]', r'valid-load-val', r'exec-load-val'),
Instruction(1.0, r'\I32.\LOAD~x~\memarg', r'\hex{28}', r'[\X{at}] \to [\I32]', r'valid-load-num', r'exec-load-num'),
Instruction(1.0, r'\I64.\LOAD~x~\memarg', r'\hex{29}', r'[\X{at}] \to [\I64]', r'valid-load-num', r'exec-load-num'),
Instruction(1.0, r'\F32.\LOAD~x~\memarg', r'\hex{2A}', r'[\X{at}] \to [\F32]', r'valid-load-num', r'exec-load-num'),
Instruction(1.0, r'\F64.\LOAD~x~\memarg', r'\hex{2B}', r'[\X{at}] \to [\F64]', r'valid-load-num', r'exec-load-num'),
Instruction(1.0, r'\I32.\LOAD\K{8\_s}~x~\memarg', r'\hex{2C}', r'[\X{at}] \to [\I32]', r'valid-load-pack', r'exec-load-pack'),
Instruction(1.0, r'\I32.\LOAD\K{8\_u}~x~\memarg', r'\hex{2D}', r'[\X{at}] \to [\I32]', r'valid-load-pack', r'exec-load-pack'),
Instruction(1.0, r'\I32.\LOAD\K{16\_s}~x~\memarg', r'\hex{2E}', r'[\X{at}] \to [\I32]', r'valid-load-pack', r'exec-load-pack'),
Expand All @@ -131,10 +131,10 @@ def Instruction(version, name, opcode, type=None, validation=None, execution=Non
Instruction(1.0, r'\I64.\LOAD\K{16\_u}~x~\memarg', r'\hex{33}', r'[\X{at}] \to [\I64]', r'valid-load-pack', r'exec-load-pack'),
Instruction(1.0, r'\I64.\LOAD\K{32\_s}~x~\memarg', r'\hex{34}', r'[\X{at}] \to [\I64]', r'valid-load-pack', r'exec-load-pack'),
Instruction(1.0, r'\I64.\LOAD\K{32\_u}~x~\memarg', r'\hex{35}', r'[\X{at}] \to [\I64]', r'valid-load-pack', r'exec-load-pack'),
Instruction(1.0, r'\I32.\STORE~x~\memarg', r'\hex{36}', r'[\X{at}~\I32] \to []', r'valid-store-val', r'exec-store-val'),
Instruction(1.0, r'\I64.\STORE~x~\memarg', r'\hex{37}', r'[\X{at}~\I64] \to []', r'valid-store-val', r'exec-store-val'),
Instruction(1.0, r'\F32.\STORE~x~\memarg', r'\hex{38}', r'[\X{at}~\F32] \to []', r'valid-store-val', r'exec-store-val'),
Instruction(1.0, r'\F64.\STORE~x~\memarg', r'\hex{39}', r'[\X{at}~\F64] \to []', r'valid-store-val', r'exec-store-val'),
Instruction(1.0, r'\I32.\STORE~x~\memarg', r'\hex{36}', r'[\X{at}~\I32] \to []', r'valid-store-num', r'exec-store-num'),
Instruction(1.0, r'\I64.\STORE~x~\memarg', r'\hex{37}', r'[\X{at}~\I64] \to []', r'valid-store-num', r'exec-store-num'),
Instruction(1.0, r'\F32.\STORE~x~\memarg', r'\hex{38}', r'[\X{at}~\F32] \to []', r'valid-store-num', r'exec-store-num'),
Instruction(1.0, r'\F64.\STORE~x~\memarg', r'\hex{39}', r'[\X{at}~\F64] \to []', r'valid-store-num', r'exec-store-num'),
Instruction(1.0, r'\I32.\STORE\K{8}~x~\memarg', r'\hex{3A}', r'[\X{at}~\I32] \to []', r'valid-store-pack', r'exec-store-pack'),
Instruction(1.0, r'\I32.\STORE\K{16}~x~\memarg', r'\hex{3B}', r'[\X{at}~\I32] \to []', r'valid-store-pack', r'exec-store-pack'),
Instruction(1.0, r'\I64.\STORE\K{8}~x~\memarg', r'\hex{3C}', r'[\X{at}~\I64] \to []', r'valid-store-pack', r'exec-store-pack'),
Expand Down Expand Up @@ -379,7 +379,7 @@ def Instruction(version, name, opcode, type=None, validation=None, execution=Non
Instruction(2.0, r'\TABLESIZE~x', r'\hex{FC}~\hex{10}', r'[] \to [\X{at}]', r'valid-table.size', r'exec-table.size'),
Instruction(2.0, r'\TABLEFILL~x', r'\hex{FC}~\hex{11}', r'[\X{at}~t~\X{at}] \to []', r'valid-table.fill', r'exec-table.fill'),
Instruction(0.0, None, r'\hex{FC}~\hex{12} \dots'),
Instruction(2.0, r'\V128.\VLOAD~x~\memarg', r'\hex{FD}~~\hex{00}', r'[\X{at}] \to [\V128]', r'valid-vload-val', r'exec-vload-val'),
Instruction(2.0, r'\V128.\VLOAD~x~\memarg', r'\hex{FD}~~\hex{00}', r'[\X{at}] \to [\V128]', r'valid-vload-num', r'exec-vload-num'),
Instruction(2.0, r'\V128.\VLOAD\K{8x8\_s}~x~\memarg', r'\hex{FD}~~\hex{01}', r'[\X{at}] \to [\V128]', r'valid-vload-pack', r'exec-vload-pack'),
Instruction(2.0, r'\V128.\VLOAD\K{8x8\_u}~x~\memarg', r'\hex{FD}~~\hex{02}', r'[\X{at}] \to [\V128]', r'valid-vload-pack', r'exec-vload-pack'),
Instruction(2.0, r'\V128.\VLOAD\K{16x4\_s}~x~\memarg', r'\hex{FD}~~\hex{03}', r'[\X{at}] \to [\V128]', r'valid-vload-pack', r'exec-vload-pack'),
Expand Down
32 changes: 25 additions & 7 deletions document/core/exec/instructions.rst
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Expand Up @@ -551,13 +551,25 @@ Memory Instructions
However, it may be substantially slower on some hardware.


.. _exec-load-val:
.. _exec-load-num:

$${rule-prose: Step_read/load-num-*}

$${rule: {Step_read/load-num-*}}


.. _exec-load-pack:
.. _exec-vload-val:

$${rule-prose: Step_read/load}
$${rule-prose: Step_read/load-pack-*}

$${rule: {Step_read/load-pack-*}}


.. _exec-vload-num:

$${rule: {Step_read/load-*}}
$${rule-prose: Step_read/vload-num-*}

$${rule: {Step_read/vload-num-*}}


.. _exec-vload-pack:
Expand Down Expand Up @@ -588,13 +600,19 @@ $${rule-prose: Step_read/vload_lane}
$${rule: {Step_read/vload_lane-*}}


.. _exec-store-val:
.. _exec-store-num:
.. _exec-store-pack:
.. _exec-vstore:

$${rule-prose: Step/store}

$${rule: {Step/store-* Step/vstore-*}}
$${rule: {Step/store-*}}


.. _exec-vstore:

$${rule-prose: Step/vstore}

$${rule: {Step/vstore-*}}


.. _exec-vstore_lane:
Expand Down
20 changes: 10 additions & 10 deletions document/core/valid/instructions.rst
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Expand Up @@ -569,14 +569,14 @@ $${rule-prose: Memarg_ok}
$${rule: Memarg_ok}


.. _valid-load-val:
.. _valid-load-num:

:math:`t\K{.}\LOAD~x~\memarg`
.............................

$${rule-prose: Instr_ok/load-val}
$${rule-prose: Instr_ok/load-num}

$${rule: Instr_ok/load-val}
$${rule: Instr_ok/load-num}


.. _valid-load-pack:
Expand All @@ -589,14 +589,14 @@ $${rule-prose: Instr_ok/load-pack}
$${rule: Instr_ok/load-pack}


.. _valid-store-val:
.. _valid-store-num:

:math:`t\K{.}\STORE~x~\memarg`
..............................

$${rule-prose: Instr_ok/store-val}
$${rule-prose: Instr_ok/store-num}

$${rule: Instr_ok/store-val}
$${rule: Instr_ok/store-num}


.. _valid-store-pack:
Expand All @@ -609,14 +609,14 @@ $${rule-prose: Instr_ok/store-pack}
$${rule: Instr_ok/store-pack}


.. _valid-vload-val:
.. _valid-vload-num:

:math:`\K{v128.}\LOAD~x~\memarg`
.....................................
................................

$${rule-prose: Instr_ok/vload-val}
$${rule-prose: Instr_ok/vload-num}

$${rule: Instr_ok/vload-val}
$${rule: Instr_ok/vload-num}


.. _valid-vload-pack:
Expand Down
6 changes: 3 additions & 3 deletions specification/wasm-3.0/2.3-validation.instructions.spectec
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Expand Up @@ -448,7 +448,7 @@ rule Instr_ok/load:
-- if K? = eps \/ nt = Inn
;)

rule Instr_ok/load-val:
rule Instr_ok/load-num:
C |- LOAD nt x memarg : at -> nt
-- if C.MEMS[x] = at lim PAGE
-- Memarg_ok: |- memarg : at -> $size(nt)
Expand All @@ -467,7 +467,7 @@ rule Instr_ok/store:
-- if K? = eps \/ nt = Inn
;)

rule Instr_ok/store-val:
rule Instr_ok/store-num:
C |- STORE nt x memarg : at nt -> eps
-- if C.MEMS[x] = at lim PAGE
-- Memarg_ok: |- memarg : at -> $size(nt)
Expand All @@ -477,7 +477,7 @@ rule Instr_ok/store-pack:
-- if C.MEMS[x] = at lim PAGE
-- Memarg_ok: |- memarg : at -> K

rule Instr_ok/vload-val:
rule Instr_ok/vload-num:
C |- VLOAD V128 x memarg : at -> V128
-- if C.MEMS[x] = at lim PAGE
-- Memarg_ok: |- memarg : at -> $vsize(V128)
Expand Down
4 changes: 2 additions & 2 deletions specification/wasm-3.0/4.3-execution.instructions.spectec
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Expand Up @@ -451,11 +451,11 @@ rule Step_read/load-pack-val:
----
-- if $ibytes_(n, c) = $mem(z, x).BYTES[i + ao.OFFSET : n/8]

rule Step_read/vload-oob:
rule Step_read/vload-num-oob:
z; (CONST at i) (VLOAD V128 x ao) ~> TRAP
-- if $(i + ao.OFFSET + $vsize(V128)/8 > |$mem(z, x).BYTES|)

rule Step_read/vload-val:
rule Step_read/vload-num-val:
z; (CONST at i) (VLOAD V128 x ao) ~> (VCONST V128 c)
-- if $vbytes_(V128, c) = $mem(z, x).BYTES[i + ao.OFFSET : $vsize(V128)/8]

Expand Down
6 changes: 3 additions & 3 deletions specification/wasm-latest/2.3-validation.instructions.spectec
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Expand Up @@ -448,7 +448,7 @@ rule Instr_ok/load:
-- if K? = eps \/ nt = Inn
;)

rule Instr_ok/load-val:
rule Instr_ok/load-num:
C |- LOAD nt x memarg : at -> nt
-- if C.MEMS[x] = at lim PAGE
-- Memarg_ok: |- memarg : at -> $size(nt)
Expand All @@ -467,7 +467,7 @@ rule Instr_ok/store:
-- if K? = eps \/ nt = Inn
;)

rule Instr_ok/store-val:
rule Instr_ok/store-num:
C |- STORE nt x memarg : at nt -> eps
-- if C.MEMS[x] = at lim PAGE
-- Memarg_ok: |- memarg : at -> $size(nt)
Expand All @@ -477,7 +477,7 @@ rule Instr_ok/store-pack:
-- if C.MEMS[x] = at lim PAGE
-- Memarg_ok: |- memarg : at -> K

rule Instr_ok/vload-val:
rule Instr_ok/vload-num:
C |- VLOAD V128 x memarg : at -> V128
-- if C.MEMS[x] = at lim PAGE
-- Memarg_ok: |- memarg : at -> $vsize(V128)
Expand Down
4 changes: 2 additions & 2 deletions specification/wasm-latest/4.3-execution.instructions.spectec
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Expand Up @@ -451,11 +451,11 @@ rule Step_read/load-pack-val:
----
-- if $ibytes_(n, c) = $mem(z, x).BYTES[i + ao.OFFSET : n/8]

rule Step_read/vload-oob:
rule Step_read/vload-num-oob:
z; (CONST at i) (VLOAD V128 x ao) ~> TRAP
-- if $(i + ao.OFFSET + $vsize(V128)/8 > |$mem(z, x).BYTES|)

rule Step_read/vload-val:
rule Step_read/vload-num-val:
z; (CONST at i) (VLOAD V128 x ao) ~> (VCONST V128 c)
-- if $vbytes_(V128, c) = $mem(z, x).BYTES[i + ao.OFFSET : $vsize(V128)/8]

Expand Down
10 changes: 5 additions & 5 deletions spectec/test-frontend/TEST.md
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Expand Up @@ -4275,7 +4275,7 @@ relation Instr_ok: `%|-%:%`(context, instr, instrtype)
-- if (C.DATAS_context[x!`%`_idx.0] = OK_datatype)

;; ../../../../specification/wasm-latest/2.3-validation.instructions.spectec:451.1-454.44
rule `load-val`{C : context, nt : numtype, x : idx, memarg : memarg, at : addrtype, lim : limits}:
rule `load-num`{C : context, nt : numtype, x : idx, memarg : memarg, at : addrtype, lim : limits}:
`%|-%:%`(C, LOAD_instr(nt, ?(), x, memarg), `%->_%%`_instrtype(`%`_resulttype([(at : addrtype <: valtype)],), [], `%`_resulttype([(nt : numtype <: valtype)],)))
-- if (C.MEMS_context[x!`%`_idx.0] = `%%PAGE`_memtype(at, lim))
-- Memarg_ok: `|-%:%->%`(memarg, at, $size(nt))
Expand All @@ -4287,7 +4287,7 @@ relation Instr_ok: `%|-%:%`(context, instr, instrtype)
-- Memarg_ok: `|-%:%->%`(memarg, at, K)

;; ../../../../specification/wasm-latest/2.3-validation.instructions.spectec:470.1-473.44
rule `store-val`{C : context, nt : numtype, x : idx, memarg : memarg, at : addrtype, lim : limits}:
rule `store-num`{C : context, nt : numtype, x : idx, memarg : memarg, at : addrtype, lim : limits}:
`%|-%:%`(C, STORE_instr(nt, ?(), x, memarg), `%->_%%`_instrtype(`%`_resulttype([(at : addrtype <: valtype) (nt : numtype <: valtype)],), [], `%`_resulttype([],)))
-- if (C.MEMS_context[x!`%`_idx.0] = `%%PAGE`_memtype(at, lim))
-- Memarg_ok: `|-%:%->%`(memarg, at, $size(nt))
Expand All @@ -4299,7 +4299,7 @@ relation Instr_ok: `%|-%:%`(context, instr, instrtype)
-- Memarg_ok: `|-%:%->%`(memarg, at, K)

;; ../../../../specification/wasm-latest/2.3-validation.instructions.spectec:480.1-483.47
rule `vload-val`{C : context, x : idx, memarg : memarg, at : addrtype, lim : limits}:
rule `vload-num`{C : context, x : idx, memarg : memarg, at : addrtype, lim : limits}:
`%|-%:%`(C, VLOAD_instr(V128_vectype, ?(), x, memarg), `%->_%%`_instrtype(`%`_resulttype([(at : addrtype <: valtype)],), [], `%`_resulttype([V128_valtype],)))
-- if (C.MEMS_context[x!`%`_idx.0] = `%%PAGE`_memtype(at, lim))
-- Memarg_ok: `|-%:%->%`(memarg, at, $vsize(V128_vectype))
Expand Down Expand Up @@ -7103,12 +7103,12 @@ relation Step_read: `%~>%`(config, instr*)
-- if ($ibytes_(n, c) = $mem(z, x).BYTES_meminst[(i!`%`_num_.0 + ao.OFFSET_memarg!`%`_u64.0) : (((n : nat <:> rat) / (8 : nat <:> rat)) : rat <:> nat)])

;; ../../../../specification/wasm-latest/4.3-execution.instructions.spectec
rule `vload-oob`{z : state, at : addrtype, i : num_((at : addrtype <: numtype)), x : idx, ao : memarg}:
rule `vload-num-oob`{z : state, at : addrtype, i : num_((at : addrtype <: numtype)), x : idx, ao : memarg}:
`%~>%`(`%;%`_config(z, [CONST_instr((at : addrtype <: numtype), i) VLOAD_instr(V128_vectype, ?(), x, ao)]), [TRAP_instr])
-- if (((i!`%`_num_.0 + ao.OFFSET_memarg!`%`_u64.0) + ((($vsize(V128_vectype) : nat <:> rat) / (8 : nat <:> rat)) : rat <:> nat)) > |$mem(z, x).BYTES_meminst|)

;; ../../../../specification/wasm-latest/4.3-execution.instructions.spectec
rule `vload-val`{z : state, at : addrtype, i : num_((at : addrtype <: numtype)), x : idx, ao : memarg, c : vec_(V128_Vnn)}:
rule `vload-num-val`{z : state, at : addrtype, i : num_((at : addrtype <: numtype)), x : idx, ao : memarg, c : vec_(V128_Vnn)}:
`%~>%`(`%;%`_config(z, [CONST_instr((at : addrtype <: numtype), i) VLOAD_instr(V128_vectype, ?(), x, ao)]), [VCONST_instr(V128_vectype, c)])
-- if ($vbytes_(V128_vectype, c) = $mem(z, x).BYTES_meminst[(i!`%`_num_.0 + ao.OFFSET_memarg!`%`_u64.0) : ((($vsize(V128_vectype) : nat <:> rat) / (8 : nat <:> rat)) : rat <:> nat)])

Expand Down
10 changes: 5 additions & 5 deletions spectec/test-latex/TEST.md
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Expand Up @@ -6891,7 +6891,7 @@ C{.}\mathsf{mems}{}[x] = {\mathit{at}}~{\mathit{lim}}~\mathsf{page}
{\vdash}\, {\mathit{memarg}} : {\mathit{at}} \rightarrow {|{\mathit{nt}}|}
}{
C \vdash {\mathit{nt}}{.}\mathsf{load}~x~{\mathit{memarg}} : {\mathit{at}} \rightarrow {\mathit{nt}}
} \, {[\textsc{\scriptsize T{-}instr{-}load{-}val}]}
} \, {[\textsc{\scriptsize T{-}instr{-}load{-}num}]}
\qquad
\end{array}
$$
Expand All @@ -6917,7 +6917,7 @@ C{.}\mathsf{mems}{}[x] = {\mathit{at}}~{\mathit{lim}}~\mathsf{page}
{\vdash}\, {\mathit{memarg}} : {\mathit{at}} \rightarrow {|{\mathit{nt}}|}
}{
C \vdash {\mathit{nt}}{.}\mathsf{store}~x~{\mathit{memarg}} : {\mathit{at}}~{\mathit{nt}} \rightarrow \epsilon
} \, {[\textsc{\scriptsize T{-}instr{-}store{-}val}]}
} \, {[\textsc{\scriptsize T{-}instr{-}store{-}num}]}
\qquad
\end{array}
$$
Expand All @@ -6943,7 +6943,7 @@ C{.}\mathsf{mems}{}[x] = {\mathit{at}}~{\mathit{lim}}~\mathsf{page}
{\vdash}\, {\mathit{memarg}} : {\mathit{at}} \rightarrow {|\mathsf{v{\scriptstyle 128}}|}
}{
C \vdash \mathsf{v{\scriptstyle 128}}{.}\mathsf{load}~x~{\mathit{memarg}} : {\mathit{at}} \rightarrow \mathsf{v{\scriptstyle 128}}
} \, {[\textsc{\scriptsize T{-}instr{-}vload{-}val}]}
} \, {[\textsc{\scriptsize T{-}instr{-}vload{-}num}]}
\qquad
\end{array}
$$
Expand Down Expand Up @@ -10241,8 +10241,8 @@ $$
&&& \multicolumn{2}{@{}l@{}}{\quad
\quad \mbox{if}~ {{\mathrm{bytes}}}_{{\mathsf{i}}{n}}(c) = z{.}\mathsf{mems}{}[x]{.}\mathsf{bytes}{}[i + {\mathit{ao}}{.}\mathsf{offset} : n / 8]
} \\
{[\textsc{\scriptsize E{-}vload{-}oob}]} \quad & z ; ({\mathit{at}}{.}\mathsf{const}~i)~(\mathsf{v{\scriptstyle 128}}{.}\mathsf{load}~x~{\mathit{ao}}) & \hookrightarrow & \mathsf{trap} & \quad \mbox{if}~ i + {\mathit{ao}}{.}\mathsf{offset} + {|\mathsf{v{\scriptstyle 128}}|} / 8 > {|z{.}\mathsf{mems}{}[x]{.}\mathsf{bytes}|} \\
{[\textsc{\scriptsize E{-}vload{-}val}]} \quad & z ; ({\mathit{at}}{.}\mathsf{const}~i)~(\mathsf{v{\scriptstyle 128}}{.}\mathsf{load}~x~{\mathit{ao}}) & \hookrightarrow & (\mathsf{v{\scriptstyle 128}}{.}\mathsf{const}~c) & \quad \mbox{if}~ {{\mathrm{bytes}}}_{\mathsf{v{\scriptstyle 128}}}(c) = z{.}\mathsf{mems}{}[x]{.}\mathsf{bytes}{}[i + {\mathit{ao}}{.}\mathsf{offset} : {|\mathsf{v{\scriptstyle 128}}|} / 8] \\
{[\textsc{\scriptsize E{-}vload{-}num{-}oob}]} \quad & z ; ({\mathit{at}}{.}\mathsf{const}~i)~(\mathsf{v{\scriptstyle 128}}{.}\mathsf{load}~x~{\mathit{ao}}) & \hookrightarrow & \mathsf{trap} & \quad \mbox{if}~ i + {\mathit{ao}}{.}\mathsf{offset} + {|\mathsf{v{\scriptstyle 128}}|} / 8 > {|z{.}\mathsf{mems}{}[x]{.}\mathsf{bytes}|} \\
{[\textsc{\scriptsize E{-}vload{-}num{-}val}]} \quad & z ; ({\mathit{at}}{.}\mathsf{const}~i)~(\mathsf{v{\scriptstyle 128}}{.}\mathsf{load}~x~{\mathit{ao}}) & \hookrightarrow & (\mathsf{v{\scriptstyle 128}}{.}\mathsf{const}~c) & \quad \mbox{if}~ {{\mathrm{bytes}}}_{\mathsf{v{\scriptstyle 128}}}(c) = z{.}\mathsf{mems}{}[x]{.}\mathsf{bytes}{}[i + {\mathit{ao}}{.}\mathsf{offset} : {|\mathsf{v{\scriptstyle 128}}|} / 8] \\
\end{array}
$$

Expand Down
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