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// Inferno utils/8c/machcap.c
// http://code.google.com/p/inferno-os/source/browse/utils/8c/machcap.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"
int
machcap(Node *n)
{
if(n == Z)
return 1; /* test */
switch(n->op) {
case OMUL:
case OLMUL:
case OASMUL:
case OASLMUL:
if(typechl[n->type->etype])
return 1;
if(typev[n->type->etype]) {
return 1;
}
break;
case OCOM:
case ONEG:
case OADD:
case OAND:
case OOR:
case OSUB:
case OXOR:
case OASHL:
case OLSHR:
case OASHR:
if(typechlv[n->left->type->etype])
return 1;
break;
case OCAST:
if(typev[n->type->etype]) {
if(typechlp[n->left->type->etype])
return 1;
}
else if(!typefd[n->type->etype]) {
if(typev[n->left->type->etype])
return 1;
}
break;
case OCOND:
case OCOMMA:
case OLIST:
case OANDAND:
case OOROR:
case ONOT:
return 1;
case OASADD:
case OASSUB:
case OASAND:
case OASOR:
case OASXOR:
return 1;
case OASASHL:
case OASASHR:
case OASLSHR:
return 1;
case OPOSTINC:
case OPOSTDEC:
case OPREINC:
case OPREDEC:
return 1;
case OEQ:
case ONE:
case OLE:
case OGT:
case OLT:
case OGE:
case OHI:
case OHS:
case OLO:
case OLS:
return 1;
}
return 0;
}
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