Fix memory index in data instantiation

Author: rossberg

document/core/exec/modules.rst

@@ -674,19 +674,17 @@ It is up to the :ref:`embedder <embedder>` to define how such conditions are rep
 
 16. For each :ref:`data segment <syntax-data>` :math:`\data_i` in :math:`\module.\MDATAS` whose :ref:`mode <syntax-datamode>` is of the form :math:`\DACTIVE~\{ \DMEM~\memidx_i, \DOFFSET~\X{dinstr}^\ast_i~\END \}`, do:
 
-    a. Assert: :math:`\memidx_i` is :math:`0`.
+    a. Let :math:`n` be the length of the vector :math:`\data_i.\DINIT`.
 
-    b. Let :math:`n` be the length of the vector :math:`\data_i.\DINIT`.
+    b. :ref:`Execute <exec-instr-seq>` the instruction sequence :math:`\X{dinstr}^\ast_i`.
 
-    c. :ref:`Execute <exec-instr-seq>` the instruction sequence :math:`\X{dinstr}^\ast_i`.
-
-    d. :ref:`Execute <exec-const>` the instruction :math:`\I32.\CONST~0`.
+    c. :ref:`Execute <exec-const>` the instruction :math:`\I32.\CONST~0`.
 
-    e. :ref:`Execute <exec-const>` the instruction :math:`\I32.\CONST~n`.
+    d. :ref:`Execute <exec-const>` the instruction :math:`\I32.\CONST~n`.
 
-    f. :ref:`Execute <exec-memory.init>` the instruction :math:`\MEMORYINIT~i`.
+    e. :ref:`Execute <exec-memory.init>` the instruction :math:`\MEMORYINIT~i`.
 
-    g. :ref:`Execute <exec-data.drop>` the instruction :math:`\DATADROP~i`.
+    f. :ref:`Execute <exec-data.drop>` the instruction :math:`\DATADROP~i`.
 
 17. If the :ref:`start function <syntax-start>` :math:`\module.\MSTART` is not empty, then:
 
@@ -737,8 +735,8 @@ where:
    \F{runelem}_i(\{\ETYPE~\X{et}, \EINIT~\reff^n, \EMODE~\EDECLARATIVE\}) \quad=\\ \qquad
      (\ELEMDROP~i) \\[1ex]
    \F{rundata}_i(\{\DINIT~b^n, \DMODE~\DPASSIVE\}) \quad=\quad \epsilon \\
-   \F{rundata}_i(\{\DINIT~b^n, \DMODE~\DACTIVE \{\DMEM~0, \DOFFSET~\instr^\ast~\END\}\}) \quad=\\ \qquad
-     \instr^\ast~(\I32.\CONST~0)~(\I32.\CONST~n)~(\MEMORYINIT~i)~(\DATADROP~i) \\
+   \F{rundata}_i(\{\DINIT~b^n, \DMODE~\DACTIVE \{\DMEM~x, \DOFFSET~\instr^\ast~\END\}\}) \quad=\\ \qquad
+     \instr^\ast~(\I32.\CONST~0)~(\I32.\CONST~n)~(\MEMORYINIT~x~i)~(\DATADROP~i) \\
    \end{array}
 
 .. note::