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Warn about automatic instruction alterations

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Step 1 of #986
This commit is contained in:
ISSOtm
2022-05-21 21:49:07 +02:00
parent b037d54f64
commit 97c326942f
6 changed files with 71 additions and 4 deletions
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15
src/asm/parser.y
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@@ -1801,8 +1801,13 @@ z80_ei : T_Z80_EI { sect_AbsByte(0xFB); }
z80_halt : T_Z80_HALT {
sect_AbsByte(0x76);
if (haltnop)
if (haltnop) {
if (warnOnHaltNop) {
warnOnHaltNop = false;
warning(WARNING_OBSOLETE, "`nop` after `halt` will stop being the default; pass `-H` to opt into it\n");
}
sect_AbsByte(0x00);
}
}
;
@@ -1910,6 +1915,10 @@ z80_ld_mem : T_Z80_LD op_mem_ind T_COMMA T_MODE_SP {
| T_Z80_LD op_mem_ind T_COMMA T_MODE_A {
if (optimizeLoads && rpn_isKnown(&$2)
&& $2.val >= 0xFF00) {
if (warnOnLdOpt) {
warnOnLdOpt = false;
warning(WARNING_OBSOLETE, "ld optimization will stop being the default; pass `-l` to opt into it\n");
}
sect_AbsByte(0xE0);
sect_AbsByte($2.val & 0xFF);
rpn_Free(&$2);
@@ -1958,6 +1967,10 @@ z80_ld_a : T_Z80_LD reg_r T_COMMA c_ind {
if ($2 == REG_A) {
if (optimizeLoads && rpn_isKnown(&$4)
&& $4.val >= 0xFF00) {
if (warnOnLdOpt) {
warnOnLdOpt = false;
warning(WARNING_OBSOLETE, "ld optimization will stop being the default; pass `-l` to opt into it\n");
}
sect_AbsByte(0xF0);
sect_AbsByte($4.val & 0xFF);
rpn_Free(&$4);