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Refactor alignment spec parsing (#1253)

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This commit is contained in:
Rangi
2023-11-24 18:06:05 -05:00
committed by GitHub
parent 92836408cc
commit 756f2866bb
2 changed files with 35 additions and 53 deletions
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2
include/asm/lexer.hpp
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@@ -84,7 +84,7 @@ int yylex(void);
bool lexer_CaptureRept(struct CaptureBody *capture);
bool lexer_CaptureMacroBody(struct CaptureBody *capture);
struct DsAlignment {
struct AlignmentSpec {
uint8_t alignment;
uint16_t alignOfs;
};

86
src/asm/parser.y
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@@ -503,7 +503,7 @@ enum {
struct SectionSpec sectSpec;
struct MacroArgs *macroArg;
enum AssertionType assertType;
struct DsAlignment dsAlign;
struct AlignmentSpec alignSpec;
struct DsArgList dsArgs;
struct PurgeArgList purgeArgs;
struct {
@@ -661,11 +661,10 @@ enum {
%type <sectMod> sectmod
%type <macroArg> macroargs
%type <dsAlign> ds_align
%type <alignSpec> align_spec
%type <dsArgs> ds_args
%type <purgeArgs> purge_args
%type <forArgs> for_args
%token T_Z80_ADC "adc" T_Z80_ADD "add" T_Z80_AND "and"
@@ -1016,20 +1015,27 @@ rl : T_LABEL T_Z80_RL rs_uconst {
}
;
align : T_OP_ALIGN uconst {
if ($2 > 16)
error("Alignment must be between 0 and 16, not %u\n", $2);
else
sect_AlignPC($2, 0);
align : T_OP_ALIGN align_spec { sect_AlignPC($2.alignment, $2.alignOfs); }
;
align_spec : uconst {
if ($1 > 16) {
error("Alignment must be between 0 and 16, not %u\n", $1);
} else {
$$.alignment = $1;
$$.alignOfs = 0;
}
}
| uconst T_COMMA uconst {
if ($1 > 16) {
error("Alignment must be between 0 and 16, not %u\n", $1);
} else if ($3 >= 1 << $1) {
error("Alignment offset (%u) must be smaller than alignment size (%u)\n",
$3, 1 << $1);
} else {
$$.alignment = $1;
$$.alignOfs = $3;
}
| T_OP_ALIGN uconst T_COMMA uconst {
if ($2 > 16)
error("Alignment must be between 0 and 16, not %u\n", $2);
else if ($4 >= 1 << $2)
error("Offset must be between 0 and %u, not %u\n",
(1 << $2) - 1, $4);
else
sect_AlignPC($2, $4);
}
;
@@ -1196,39 +1202,18 @@ ds : T_POP_DS uconst { sect_Skip($2, true); }
sect_RelBytes($2, $4.args, $4.nbArgs);
freeDsArgList(&$4);
}
| T_POP_DS ds_align trailing_comma {
uint32_t n = sect_GetAlignBytes($2.alignment, $2.alignOfs);
| T_POP_DS T_OP_ALIGN T_LBRACK align_spec T_RBRACK trailing_comma {
uint32_t n = sect_GetAlignBytes($4.alignment, $4.alignOfs);
sect_Skip(n, true);
sect_AlignPC($2.alignment, $2.alignOfs);
sect_AlignPC($4.alignment, $4.alignOfs);
}
| T_POP_DS ds_align T_COMMA ds_args trailing_comma {
uint32_t n = sect_GetAlignBytes($2.alignment, $2.alignOfs);
| T_POP_DS T_OP_ALIGN T_LBRACK align_spec T_RBRACK T_COMMA ds_args trailing_comma {
uint32_t n = sect_GetAlignBytes($4.alignment, $4.alignOfs);
sect_RelBytes(n, $4.args, $4.nbArgs);
sect_AlignPC($2.alignment, $2.alignOfs);
freeDsArgList(&$4);
}
;
ds_align : T_OP_ALIGN T_LBRACK uconst T_RBRACK {
if ($3 > 16) {
error("Alignment must be between 0 and 16, not %u\n", $3);
} else {
$$.alignment = $3;
$$.alignOfs = 0;
}
}
| T_OP_ALIGN T_LBRACK uconst T_COMMA uconst T_RBRACK {
if ($3 > 16) {
error("Alignment must be between 0 and 16, not %u\n", $3);
} else if ($5 >= 1 << $3) {
error("Offset must be between 0 and %u, not %u\n",
(1 << $3) - 1, $5);
} else {
$$.alignment = $3;
$$.alignOfs = $5;
}
sect_RelBytes(n, $7.args, $7.nbArgs);
sect_AlignPC($4.alignment, $4.alignOfs);
freeDsArgList(&$7);
}
;
@@ -1807,12 +1792,9 @@ sectattrs : %empty {
$$.alignOfs = 0;
$$.bank = -1;
}
| sectattrs T_COMMA T_OP_ALIGN T_LBRACK uconst T_RBRACK {
$$.alignment = $5;
}
| sectattrs T_COMMA T_OP_ALIGN T_LBRACK uconst T_COMMA uconst T_RBRACK {
$$.alignment = $5;
$$.alignOfs = $7;
| sectattrs T_COMMA T_OP_ALIGN T_LBRACK align_spec T_RBRACK {
$$.alignment = $5.alignment;
$$.alignOfs = $5.alignOfs;
}
| sectattrs T_COMMA T_OP_BANK T_LBRACK uconst T_RBRACK {
// We cannot check the validity of this now