42 lines
926 B
C
42 lines
926 B
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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#define RCSID5 "$Id$"
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/*
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* Mostek 6500 special routines.
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*/
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void branch(register int opc, expr_t exp)
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{
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register int dist;
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dist = exp.val - (DOTVAL + 2);
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if (pass == PASS_2 && dist > 0 && !(exp.typ & S_DOT))
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dist -= DOTGAIN;
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if (small(fitb(dist) && (exp.typ & ~S_DOT) == DOTTYP, 3)) {
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emit1(opc); emit1(dist);
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} else {
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emit1(opc^0x20); emit1(0x03); /* Skip over ... */
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emit1(0x4C); /* ... far jump. */
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#ifdef RELOCATION
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newrelo(exp.typ, RELO2);
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#endif
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emit2(exp.val);
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}
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}
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void code(expr_t exp, register int opc1, register int opc2)
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{
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if (small((exp.typ & S_TYP) == S_ABS && fits_zeropage(exp.val), 1)) {
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emit1(opc1); emit1(exp.val);
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} else {
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emit1(opc2);
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#ifdef RELOCATION
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newrelo(exp.typ, RELO2);
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#endif
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emit2(exp.val);
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}
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}
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