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Disallow pass/return of 3-byte struct (#2022), document capability added in #1102.

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bbbradsmith
2023-05-02 19:00:34 -04:00
parent 805e98a7aa
commit e7046a02ff
2 changed files with 2 additions and 4 deletions
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5
doc/cc65.sgml
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@@ -806,9 +806,8 @@ and the one defined by the ISO standard:
<item> The datatypes "float" and "double" are not available. <item> The datatypes "float" and "double" are not available.
<p> <p>
<item> C Functions may not return structs (or unions), and structs may not <item> C Functions may return structs (or unions) by value, but only of
be passed as parameters by value. However, struct assignment *is* 1, 2 or 4 byte sizes.
possible.
<p> <p>
<item> Most of the C library is available with only the fastcall calling <item> Most of the C library is available with only the fastcall calling
convention (<ref id="extension-fastcall" name="see below">). It means convention (<ref id="extension-fastcall" name="see below">). It means

1
src/cc65/datatype.c
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@@ -803,7 +803,6 @@ const Type* GetStructReplacementType (const Type* SType)
switch (SizeOf (SType)) { switch (SizeOf (SType)) {
case 1: NewType = type_uchar; break; case 1: NewType = type_uchar; break;
case 2: NewType = type_uint; break; case 2: NewType = type_uint; break;
case 3: /* FALLTHROUGH */
case 4: NewType = type_ulong; break; case 4: NewType = type_ulong; break;
default: NewType = SType; break; default: NewType = SType; break;
} }