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71 lines
1.2 KiB
C
71 lines
1.2 KiB
C
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#define EXTERN
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#include "l.h"
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void
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softfloat()
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{
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Prog *p, *prev, *psfloat;
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Sym *symsfloat;
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int wasfloat;
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symsfloat = lookup("_sfloat", 0);
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psfloat = P;
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if(symsfloat->type == STEXT)
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for(p = firstp; p != P; p = p->link) {
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if(p->as == ATEXT) {
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if(p->from.sym == symsfloat) {
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psfloat = p;
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break;
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}
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}
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}
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wasfloat = 0;
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p = firstp;
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prev = P;
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for(p = firstp; p != P; p = p->link) {
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switch(p->as) {
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case AMOVWD:
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case AMOVWF:
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case AMOVDW:
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case AMOVFW:
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case AMOVFD:
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case AMOVDF:
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case AMOVF:
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case AMOVD:
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case ACMPF:
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case ACMPD:
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case AADDF:
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case AADDD:
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case ASUBF:
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case ASUBD:
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case AMULF:
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case AMULD:
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case ADIVF:
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case ADIVD:
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if (psfloat == P)
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diag("floats used with _sfloat not defined");
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if (!wasfloat) {
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if (prev == P)
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diag("float instruction without predecessor TEXT");
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// BL _sfloat(SB)
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prev = appendp(prev);
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prev->as = ABL;
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prev->to.type = D_BRANCH;
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prev->to.sym = symsfloat;
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prev->cond = psfloat;
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wasfloat = 1;
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}
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break;
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default:
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wasfloat = 0;
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}
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prev = p;
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}
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}
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