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117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
// Inferno utils/8c/machcap.c
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// http://code.google.com/p/inferno-os/source/browse/utils/8c/machcap.c
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//
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
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// Portions Copyright © 1997-1999 Vita Nuova Limited
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// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
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// Portions Copyright © 2004,2006 Bruce Ellis
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// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
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// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
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// Portions Copyright © 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include "gc.h"
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int
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machcap(Node *n)
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{
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if(n == Z)
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return 1; /* test */
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switch(n->op) {
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case OMUL:
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case OLMUL:
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case OASMUL:
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case OASLMUL:
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if(typechl[n->type->etype])
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return 1;
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if(typev[n->type->etype]) {
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return 1;
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}
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break;
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case OCOM:
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case ONEG:
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case OADD:
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case OAND:
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case OOR:
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case OSUB:
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case OXOR:
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case OASHL:
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case OLSHR:
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case OASHR:
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if(typechlv[n->left->type->etype])
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return 1;
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break;
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case OCAST:
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if(typev[n->type->etype]) {
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if(typechlp[n->left->type->etype])
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return 1;
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}
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else if(!typefd[n->type->etype]) {
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if(typev[n->left->type->etype])
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return 1;
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}
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break;
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case OCOND:
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case OCOMMA:
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case OLIST:
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case OANDAND:
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case OOROR:
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case ONOT:
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return 1;
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case OASADD:
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case OASSUB:
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case OASAND:
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case OASOR:
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case OASXOR:
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return 1;
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case OASASHL:
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case OASASHR:
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case OASLSHR:
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return 1;
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case OPOSTINC:
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case OPOSTDEC:
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case OPREINC:
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case OPREDEC:
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return 1;
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case OEQ:
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case ONE:
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case OLE:
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case OGT:
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case OLT:
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case OGE:
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case OHI:
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case OHS:
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case OLO:
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case OLS:
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return 1;
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}
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return 0;
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}
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