diff options
Diffstat (limited to 'src/cmd/6c/swt.c')
| -rw-r--r-- | src/cmd/6c/swt.c | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/src/cmd/6c/swt.c b/src/cmd/6c/swt.c deleted file mode 100644 index 6e918eb10..000000000 --- a/src/cmd/6c/swt.c +++ /dev/null @@ -1,353 +0,0 @@ -// Inferno utils/6c/swt.c -// http://code.google.com/p/inferno-os/source/browse/utils/6c/swt.c -// -// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. -// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net) -// Portions Copyright © 1997-1999 Vita Nuova Limited -// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com) -// Portions Copyright © 2004,2006 Bruce Ellis -// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net) -// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others -// Portions Copyright © 2009 The Go Authors. All rights reserved. -// -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files (the "Software"), to deal -// in the Software without restriction, including without limitation the rights -// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -// copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -// THE SOFTWARE. - -#include "gc.h" - -void -swit1(C1 *q, int nc, int32 def, Node *n) -{ - Node nreg; - - regalloc(&nreg, n, Z); - if(typev[n->type->etype]) - nreg.type = types[TVLONG]; - else - nreg.type = types[TLONG]; - cgen(n, &nreg); - swit2(q, nc, def, &nreg); - regfree(&nreg); -} - -void -swit2(C1 *q, int nc, int32 def, Node *n) -{ - C1 *r; - int i; - Prog *sp; - - if(nc < 5) { - for(i=0; i<nc; i++) { - if(debug['W']) - print("case = %.8llux\n", q->val); - gcmp(OEQ, n, q->val); - patch(p, q->label); - q++; - } - gbranch(OGOTO); - patch(p, def); - return; - } - i = nc / 2; - r = q+i; - if(debug['W']) - print("case > %.8llux\n", r->val); - gcmp(OGT, n, r->val); - sp = p; - gbranch(OGOTO); - p->as = AJEQ; - patch(p, r->label); - swit2(q, i, def, n); - - if(debug['W']) - print("case < %.8llux\n", r->val); - patch(sp, pc); - swit2(r+1, nc-i-1, def, n); -} - -void -bitload(Node *b, Node *n1, Node *n2, Node *n3, Node *nn) -{ - int sh; - int32 v; - Node *l; - - /* - * n1 gets adjusted/masked value - * n2 gets address of cell - * n3 gets contents of cell - */ - l = b->left; - if(n2 != Z) { - regalloc(n1, l, nn); - reglcgen(n2, l, Z); - regalloc(n3, l, Z); - gmove(n2, n3); - gmove(n3, n1); - } else { - regalloc(n1, l, nn); - cgen(l, n1); - } - if(b->type->shift == 0 && typeu[b->type->etype]) { - v = ~0 + (1L << b->type->nbits); - gopcode(OAND, tfield, nodconst(v), n1); - } else { - sh = 32 - b->type->shift - b->type->nbits; - if(sh > 0) - gopcode(OASHL, tfield, nodconst(sh), n1); - sh += b->type->shift; - if(sh > 0) - if(typeu[b->type->etype]) - gopcode(OLSHR, tfield, nodconst(sh), n1); - else - gopcode(OASHR, tfield, nodconst(sh), n1); - } -} - -void -bitstore(Node *b, Node *n1, Node *n2, Node *n3, Node *nn) -{ - int32 v; - Node nod; - int sh; - - regalloc(&nod, b->left, Z); - v = ~0 + (1L << b->type->nbits); - gopcode(OAND, types[TLONG], nodconst(v), n1); - gmove(n1, &nod); - if(nn != Z) - gmove(n1, nn); - sh = b->type->shift; - if(sh > 0) - gopcode(OASHL, types[TLONG], nodconst(sh), &nod); - v <<= sh; - gopcode(OAND, types[TLONG], nodconst(~v), n3); - gopcode(OOR, types[TLONG], n3, &nod); - gmove(&nod, n2); - - regfree(&nod); - regfree(n1); - regfree(n2); - regfree(n3); -} - -int32 -outstring(char *s, int32 n) -{ - int32 r; - - if(suppress) - return nstring; - r = nstring; - while(n) { - string[mnstring] = *s++; - mnstring++; - nstring++; - if(mnstring >= NSNAME) { - gpseudo(ADATA, symstring, nodconst(0L)); - p->from.offset += nstring - NSNAME; - p->from.scale = NSNAME; - p->to.type = D_SCONST; - memmove(p->to.u.sval, string, NSNAME); - mnstring = 0; - } - n--; - } - return r; -} - -void -sextern(Sym *s, Node *a, int32 o, int32 w) -{ - int32 e, lw; - - for(e=0; e<w; e+=NSNAME) { - lw = NSNAME; - if(w-e < lw) - lw = w-e; - gpseudo(ADATA, s, nodconst(0L)); - p->from.offset += o+e; - p->from.scale = lw; - p->to.type = D_SCONST; - memmove(p->to.u.sval, a->cstring+e, lw); - } -} - -void -gextern(Sym *s, Node *a, int32 o, int32 w) -{ - if(0 && a->op == OCONST && typev[a->type->etype]) { - gpseudo(ADATA, s, lo64(a)); - p->from.offset += o; - p->from.scale = 4; - gpseudo(ADATA, s, hi64(a)); - p->from.offset += o + 4; - p->from.scale = 4; - return; - } - gpseudo(ADATA, s, a); - p->from.offset += o; - p->from.scale = w; - switch(p->to.type) { - default: - p->to.index = p->to.type; - p->to.type = D_ADDR; - case D_CONST: - case D_FCONST: - case D_ADDR: - break; - } -} - -void -outcode(void) -{ - int f; - Biobuf b; - - f = open(outfile, OWRITE); - if(f < 0) { - diag(Z, "cannot open %s", outfile); - return; - } - Binit(&b, f, OWRITE); - - Bprint(&b, "go object %s %s %s\n", getgoos(), getgoarch(), getgoversion()); - if(pragcgobuf.to > pragcgobuf.start) { - Bprint(&b, "\n"); - Bprint(&b, "$$ // exports\n\n"); - Bprint(&b, "$$ // local types\n\n"); - Bprint(&b, "$$ // cgo\n"); - Bprint(&b, "%s", fmtstrflush(&pragcgobuf)); - Bprint(&b, "\n$$\n\n"); - } - Bprint(&b, "!\n"); - - writeobj(ctxt, &b); - Bterm(&b); - close(f); - lastp = P; -} - -int32 -align(int32 i, Type *t, int op, int32 *maxalign) -{ - int32 o; - Type *v; - int w, packw; - - o = i; - w = 1; - packw = 0; - switch(op) { - default: - diag(Z, "unknown align opcode %d", op); - break; - - case Asu2: /* padding at end of a struct */ - w = *maxalign; - if(w < 1) - w = 1; - if(packflg) - packw = packflg; - break; - - case Ael1: /* initial align of struct element */ - for(v=t; v->etype==TARRAY; v=v->link) - ; - if(v->etype == TSTRUCT || v->etype == TUNION) - w = v->align; - else - w = ewidth[v->etype]; - if(w < 1 || w > SZ_VLONG) - fatal(Z, "align"); - if(packflg) - packw = packflg; - break; - - case Ael2: /* width of a struct element */ - o += t->width; - break; - - case Aarg0: /* initial passbyptr argument in arg list */ - if(typesu[t->etype]) { - o = align(o, types[TIND], Aarg1, nil); - o = align(o, types[TIND], Aarg2, nil); - } - break; - - case Aarg1: /* initial align of parameter */ - if(ewidth[TIND] == 4) { - if(typesu[t->etype]) { - for(v = t->link; v != T; v = v->down) - o = align(o, v, Aarg1, maxalign); - goto out; - } - w = ewidth[t->etype]; - if(typev[t->etype] || t->etype == TDOUBLE) - w = 8; - else if(w <= 0 || w >= 4) - w = 4; - else - w = 1; - break; - } - w = ewidth[t->etype]; - if(w <= 0 || w >= SZ_VLONG) { - w = SZ_VLONG; - break; - } - w = 1; /* little endian no adjustment */ - break; - - case Aarg2: /* width of a parameter */ - o += t->width; - if(ewidth[TIND] == 4) { - o = align(o, t, Aarg1, maxalign); - goto out; - } - w = t->width; - if(w > SZ_VLONG) - w = SZ_VLONG; - break; - - case Aaut3: /* total align of automatic */ - o = align(o, t, Ael1, nil); - o = align(o, t, Ael2, nil); - break; - } - if(packw != 0 && xround(o, w) != xround(o, packw)) - diag(Z, "#pragma pack changes offset of %T", t); - o = xround(o, w); - if(maxalign && *maxalign < w) - *maxalign = w; -out: - if(debug['A']) - print("align %s %d %T = %d\n", bnames[op], i, t, o); - return o; -} - -int32 -maxround(int32 max, int32 v) -{ - v = xround(v, SZ_VLONG); - if(v > max) - return v; - return max; -} |