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Implement ALIGN keyword in rgbasm

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The ALIGN keyword specifies the number of bits that should be zero at the start of a section. It works in a simliar fashion to BANK.
This commit is contained in:
Ben10do
2017-02-23 15:00:57 +00:00
parent 1b05c43b97
commit 1ab93a194e
3 changed files with 18 additions and 2 deletions
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14
src/asm/asmy.y
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@@ -442,7 +442,7 @@ void if_skip_to_endc( void )
%left T_OP_MUL T_OP_DIV T_OP_MOD
%left T_OP_NOT
%left T_OP_DEF
%left T_OP_BANK
%left T_OP_BANK T_OP_ALIGN
%left T_OP_SIN
%left T_OP_COS
%left T_OP_TAN
@@ -1095,6 +1095,10 @@ section:
else
yyerror("Address $%x not 16-bit", $6);
}
| T_POP_SECTION string ',' sectiontype ',' T_OP_ALIGN '[' const ']'
{
out_NewAlignedSection($2, $4, $8, -1);
}
| T_POP_SECTION string ',' sectiontype ',' T_OP_BANK '[' const ']'
{
bankrangecheck($2, $4, -1, $8);
@@ -1106,6 +1110,14 @@ section:
}
bankrangecheck($2, $4, $6, $11);
}
| T_POP_SECTION string ',' sectiontype ',' T_OP_ALIGN '[' const ']' ',' T_OP_BANK '[' const ']'
{
out_NewAlignedSection($2, $4, $8, $13);
}
| T_POP_SECTION string ',' sectiontype ',' T_OP_BANK '[' const ']' ',' T_OP_ALIGN '[' const ']'
{
out_NewAlignedSection($2, $4, $13, $8);
}
;
sectiontype:

1
src/asm/globlex.c
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@@ -267,6 +267,7 @@ struct sLexInitString staticstrings[] = {
{"def", T_OP_DEF},
{"bank", T_OP_BANK},
{"align", T_OP_ALIGN},
{"round", T_OP_ROUND},
{"ceil", T_OP_CEIL},

5
src/asm/output.c
View File

@@ -631,7 +631,10 @@ out_NewAbsSection(char *pzName, ULONG secttype, SLONG org, SLONG bank)
void
out_NewAlignedSection(char *pzName, ULONG secttype, SLONG alignment, SLONG bank)
{
out_SetCurrentSection(out_FindSection(pzName, secttype, -1, bank, alignment));
if (alignment < 0) {
yyerror("Alignment must not be negative.");
}
out_SetCurrentSection(out_FindSection(pzName, secttype, -1, bank, 1 << alignment));
}
/*