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Fix: CMP instruction with small constant does not handle PC-relative

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ceriel 1993-12-06 10:14:43 +00:00
parent fe99903321
commit 6561b6287f
1 changed files with 19 additions and 0 deletions
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19
mach/m68k2/as/mach5.c
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@ -221,6 +221,25 @@ cmp(sz)
return; return;
} }
if (mrg_1 == 074 && (mrg_2 & 070) != 010) { if (mrg_1 == 074 && (mrg_2 & 070) != 010) {
if (mrg_2 == 072) {
/* In this case, the ea707172 routine changed the
addressing mode to PC-relative. However, this is
not allowed for this instruction. Change it back
to absolute, but also correct for the optimization
that the ea707172 routine thought it made.
*/
if (pass == PASS_1) {
/* In this case, the user wrote it PC-relative.
Error.
*/
badoperand();
}
mrg_2 = 071;
exp_2.val += DOTVAL+2;
if (pass == PASS_2) {
DOTGAIN -= 2;
}
}
emit2(06000 | sz | mrg_2); emit2(06000 | sz | mrg_2);
ea_1(sz, 0); ea_1(sz, 0);
ea_2(sz, DTA|ALT); ea_2(sz, DTA|ALT);