ref: e7db091c25a7798829aa87e07b7e8a860b60ed3d
dir: /cc2/arch/z80/cgen.c/
/* See LICENSE file for copyright and license details. */ #include "arch.h" #include "../../cc2.h" Node * cgen(Node *np) { } /* * This is strongly influenced by * http://plan9.bell-labs.com/sys/doc/compiler.ps (/sys/doc/compiler.ps) * calculate addresability as follows * AUTO => 11 value+fp * REG => 13 reg * STATIC => 12 (value) * CONST => 20 $value */ Node * sethi(Node *np) { Node *lp, *rp; if (!np) return np; np->complex = 0; np->address = 0; lp = np->left; rp = np->right; switch (np->op) { case OAUTO: np->address = 11; break; case OREG: np->address = 13; break; case OMEM: np->address = 12; break; case OCONST: np->address = 20; break; default: sethi(lp); sethi(rp); break; } if (np->address > 10) return np; if (lp) np->complex = lp->complex; if (rp) { int d = np->complex - rp->complex; if (d == 0) ++np->complex; else if (d < 0) np->complex = rp->complex; } if (np->complex == 0) ++np->complex; return np; }