2008-09-02 22:29:23 -07:00
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/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*- */
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2008-09-02 22:29:23 -07:00
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is [Open Source Virtual Machine].
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*
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* The Initial Developer of the Original Code is
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* Adobe System Incorporated.
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* Portions created by the Initial Developer are Copyright (C) 2004-2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Adobe AS3 Team
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2008-09-02 22:29:23 -07:00
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* Vladimir Vukicevic <vladimir@pobox.com>
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2008-09-02 22:29:23 -07:00
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nanojit.h"
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#ifdef AVMPLUS_PORTING_API
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#include "portapi_nanojit.h"
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#endif
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#ifdef UNDER_CE
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#include <cmnintrin.h>
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#endif
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#if defined(AVMPLUS_LINUX)
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#include <asm/unistd.h>
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2008-09-02 22:29:23 -07:00
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extern "C" void __clear_cache(char *BEG, char *END);
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2008-09-02 22:29:23 -07:00
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#endif
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2008-09-02 22:29:23 -07:00
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#ifdef FEATURE_NANOJIT
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2008-09-02 22:29:23 -07:00
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namespace nanojit
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{
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#ifdef NJ_VERBOSE
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2008-09-02 22:29:23 -07:00
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const char* regNames[] = {"r0","r1","r2","r3","r4","r5","r6","r7","r8","r9","r10","FP","IP","SP","LR","PC",
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"d0","d1","d2","d3","d4","d5","d6","d7","s14"};
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2008-09-02 22:29:23 -07:00
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#endif
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const Register Assembler::argRegs[] = { R0, R1, R2, R3 };
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const Register Assembler::retRegs[] = { R0, R1 };
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void
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Assembler::nInit(AvmCore*)
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{
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// all ARMs have conditional move
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has_cmov = true;
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}
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NIns*
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Assembler::genPrologue(RegisterMask needSaving)
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{
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/**
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* Prologue
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*/
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2008-09-02 22:29:23 -07:00
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2008-09-02 22:29:23 -07:00
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// NJ_RESV_OFFSET is space at the top of the stack for us
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// to use for parameter passing (8 bytes at the moment)
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uint32_t stackNeeded = 4 * _activation.highwatermark + NJ_STACK_OFFSET;
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uint32_t savingCount = 0;
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uint32_t savingMask = 0;
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savingCount = 9; //R4-R10,R11,LR
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savingMask = SavedRegs | rmask(FRAME_PTR);
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(void)needSaving;
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// so for alignment purposes we've pushed return addr, fp, and savingCount registers
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uint32_t stackPushed = 4 * (2+savingCount);
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uint32_t aligned = alignUp(stackNeeded + stackPushed, NJ_ALIGN_STACK);
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int32_t amt = aligned - stackPushed;
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// Make room on stack for what we are doing
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if (amt)
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SUBi(SP, amt);
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verbose_only( verbose_outputf(" %p:",_nIns); )
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verbose_only( verbose_output(" patch entry"); )
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NIns *patchEntry = _nIns;
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MR(FRAME_PTR, SP);
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PUSH_mask(savingMask|rmask(LR));
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return patchEntry;
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}
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void
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Assembler::nFragExit(LInsp guard)
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{
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SideExit* exit = guard->exit();
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Fragment *frag = exit->target;
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GuardRecord *lr;
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if (frag && frag->fragEntry) {
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JMP(frag->fragEntry);
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lr = 0;
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} else {
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// target doesn't exit yet. emit jump to epilog, and set up to patch later.
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lr = placeGuardRecord(guard);
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// we need to know that there's an extra immediate value available
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// for us; always force a far jump here.
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BL_far(_epilogue);
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2008-09-02 22:29:23 -07:00
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// stick the jmp pointer to the start of the sequence
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2008-09-02 22:29:23 -07:00
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lr->jmp = _nIns;
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}
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// pop the stack frame first
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MR(SP, FRAME_PTR);
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#ifdef NJ_VERBOSE
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if (_frago->core()->config.show_stats) {
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// load R1 with Fragment *fromFrag, target fragment
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// will make use of this when calling fragenter().
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int fromfrag = int((Fragment*)_thisfrag);
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LDi(argRegs[1], fromfrag);
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}
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2008-09-02 22:29:23 -07:00
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#endif
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2008-09-02 22:29:23 -07:00
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// return value is GuardRecord*
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LDi(R2, int(lr));
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}
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NIns*
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Assembler::genEpilogue(RegisterMask restore)
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{
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BX(LR); // return
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MR(R0,R2); // return LinkRecord*
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RegisterMask savingMask = restore | rmask(FRAME_PTR) | rmask(LR);
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POP_mask(savingMask); // regs
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return _nIns;
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}
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void
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Assembler::asm_call(LInsp ins)
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{
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const CallInfo* call = callInfoFor(ins->fid());
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2008-09-02 22:29:23 -07:00
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Reservation *callRes = getresv(ins);
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2008-09-02 22:29:23 -07:00
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uint32_t atypes = call->_argtypes;
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uint32_t roffset = 0;
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2008-09-02 22:29:23 -07:00
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// skip return type
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#ifdef NJ_ARM_VFP
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ArgSize rsize = (ArgSize)(atypes & 3);
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#endif
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atypes >>= 2;
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2008-09-02 22:29:23 -07:00
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// we need to detect if we have arg0 as LO followed by arg1 as F;
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// in that case, we need to skip using r1 -- the F needs to be
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// loaded in r2/r3, at least according to the ARM EABI and gcc 4.2's
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// generated code.
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bool arg0IsInt32FollowedByFloat = false;
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while ((atypes & 3) != ARGSIZE_NONE) {
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2008-09-02 22:29:23 -07:00
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if (((atypes >> 2) & 3) == ARGSIZE_LO &&
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((atypes >> 0) & 3) == ARGSIZE_F &&
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((atypes >> 4) & 3) == ARGSIZE_NONE)
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2008-09-02 22:29:23 -07:00
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{
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arg0IsInt32FollowedByFloat = true;
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break;
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2008-09-02 22:29:23 -07:00
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}
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2008-09-02 22:29:23 -07:00
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atypes >>= 2;
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}
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2008-09-02 22:29:23 -07:00
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#ifdef NJ_ARM_VFP
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if (rsize == ARGSIZE_F) {
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NanoAssert(ins->opcode() == LIR_fcall);
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NanoAssert(callRes);
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//fprintf (stderr, "call ins: %p callRes: %p reg: %d ar: %d\n", ins, callRes, callRes->reg, callRes->arIndex);
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Register rr = callRes->reg;
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int d = disp(callRes);
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freeRsrcOf(ins, rr != UnknownReg);
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if (rr != UnknownReg) {
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NanoAssert(IsFpReg(rr));
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FMDRR(rr,R0,R1);
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} else {
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NanoAssert(d);
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//fprintf (stderr, "call ins d: %d\n", d);
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STMIA(Scratch, 1<<R0 | 1<<R1);
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arm_ADDi(Scratch, FP, d);
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}
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}
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#endif
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2008-09-02 22:29:23 -07:00
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CALL(call);
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ArgSize sizes[10];
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uint32_t argc = call->get_sizes(sizes);
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2008-09-02 22:29:23 -07:00
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for(uint32_t i = 0; i < argc; i++) {
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2008-09-02 22:29:23 -07:00
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uint32_t j = argc - i - 1;
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ArgSize sz = sizes[j];
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2008-09-02 22:29:23 -07:00
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LInsp arg = ins->arg(j);
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2008-09-02 22:29:23 -07:00
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// pre-assign registers R0-R3 for arguments (if they fit)
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2008-09-02 22:29:23 -07:00
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Register r = (i + roffset) < 4 ? argRegs[i+roffset] : UnknownReg;
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#ifdef NJ_ARM_VFP
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if (sz == ARGSIZE_F) {
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if (r == R0 || r == R2) {
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roffset++;
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} else if (r == R1) {
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r = R2;
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roffset++;
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} else {
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r = UnknownReg;
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}
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// XXX move this into asm_farg
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Register sr = findRegFor(arg, FpRegs);
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if (r != UnknownReg) {
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// stick it into our scratch fp reg, and then copy into the base reg
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//fprintf (stderr, "FMRRD: %d %d <- %d\n", r, nextreg(r), sr);
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FMRRD(r, nextreg(r), sr);
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} else {
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asm_pusharg(arg);
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}
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} else {
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asm_arg(sz, arg, r);
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}
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#else
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NanoAssert(sz == ARGSIZE_LO || sz == ARGSIZE_Q);
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asm_arg(sz, arg, r);
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#endif
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2008-09-02 22:29:23 -07:00
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if (i == 0 && arg0IsInt32FollowedByFloat)
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roffset = 1;
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}
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}
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void
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Assembler::nMarkExecute(Page* page, int32_t count, bool enable)
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{
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#ifdef UNDER_CE
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DWORD dwOld;
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VirtualProtect(page, NJ_PAGE_SIZE, PAGE_EXECUTE_READWRITE, &dwOld);
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2008-09-02 22:29:23 -07:00
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#endif
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2008-09-02 22:29:23 -07:00
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#ifdef AVMPLUS_PORTING_API
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NanoJIT_PortAPI_MarkExecutable(page, (void*)((int32_t)page+count));
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#endif
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(void)page;
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(void)count;
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(void)enable;
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}
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Register
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Assembler::nRegisterAllocFromSet(int set)
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{
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// Note: The clz instruction only works on armv5 and up.
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#if defined(UNDER_CE)
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Register r;
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r = (Register)_CountLeadingZeros(set);
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r = (Register)(31-r);
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_allocator.free &= ~rmask(r);
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return r;
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#elif defined(__ARMCC__)
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register int i;
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__asm { clz i,set }
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Register r = Register(31-i);
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_allocator.free &= ~rmask(r);
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return r;
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2008-09-02 22:29:23 -07:00
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#else
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2008-09-02 22:29:23 -07:00
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// need to implement faster way
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int i=0;
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while (!(set & rmask((Register)i)))
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i ++;
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_allocator.free &= ~rmask((Register)i);
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return (Register) i;
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2008-09-02 22:29:23 -07:00
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#endif
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2008-09-02 22:29:23 -07:00
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}
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2008-09-02 22:29:23 -07:00
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2008-09-02 22:29:23 -07:00
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void
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Assembler::nRegisterResetAll(RegAlloc& a)
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{
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// add scratch registers to our free list for the allocator
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a.clear();
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a.used = 0;
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2008-09-02 22:29:23 -07:00
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a.free = rmask(R0) | rmask(R1) | rmask(R2) | rmask(R3) | rmask(R4) | rmask(R5) | FpRegs;
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2008-09-02 22:29:23 -07:00
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debug_only(a.managed = a.free);
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}
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void
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Assembler::nPatchBranch(NIns* branch, NIns* target)
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{
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// Patch the jump in a loop
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// This is ALWAYS going to be a long branch (using the BL instruction)
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// Which is really 2 instructions, so we need to modify both
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// XXX -- this is B, not BL, at least on non-Thumb..
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2008-09-02 22:29:23 -07:00
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int32_t offset = PC_OFFSET_FROM(target, branch);
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2008-09-02 22:29:23 -07:00
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//printf("---patching branch at 0x%08x to location 0x%08x (%d-0x%08x)\n", branch, target, offset, offset);
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// We have 2 words to work with here -- if offset is in range of a 24-bit
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// relative jump, emit that; otherwise, we do a pc-relative load into pc.
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2008-09-02 22:29:23 -07:00
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if (isS24(offset)) {
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2008-09-02 22:29:23 -07:00
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// ARM goodness, using unconditional B
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2008-09-02 22:29:23 -07:00
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*branch = (NIns)( COND_AL | (0xA<<24) | ((offset>>2) & 0xFFFFFF) );
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2008-09-02 22:29:23 -07:00
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} else {
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// LDR pc,[pc]
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*branch++ = (NIns)( COND_AL | (0x51<<20) | (PC<<16) | (PC<<12) | ( 0x004 ) );
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*branch = (NIns)target;
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2008-09-02 22:29:23 -07:00
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}
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2008-09-02 22:29:23 -07:00
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}
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
RegisterMask
|
|
|
|
Assembler::hint(LIns* i, RegisterMask allow /* = ~0 */)
|
|
|
|
{
|
|
|
|
uint32_t op = i->opcode();
|
|
|
|
int prefer = ~0;
|
|
|
|
|
|
|
|
if (op==LIR_call || op==LIR_fcall)
|
|
|
|
prefer = rmask(R0);
|
|
|
|
else if (op == LIR_callh)
|
|
|
|
prefer = rmask(R1);
|
|
|
|
else if (op == LIR_param)
|
|
|
|
prefer = rmask(imm2register(i->imm8()));
|
|
|
|
|
|
|
|
if (_allocator.free & allow & prefer)
|
|
|
|
allow &= prefer;
|
|
|
|
return allow;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_qjoin(LIns *ins)
|
|
|
|
{
|
|
|
|
int d = findMemFor(ins);
|
|
|
|
AvmAssert(d);
|
|
|
|
LIns* lo = ins->oprnd1();
|
|
|
|
LIns* hi = ins->oprnd2();
|
|
|
|
|
|
|
|
Register r = findRegFor(hi, GpRegs);
|
2008-09-02 22:29:23 -07:00
|
|
|
STR(r, FP, d+4);
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
// okay if r gets recycled.
|
|
|
|
r = findRegFor(lo, GpRegs);
|
2008-09-02 22:29:23 -07:00
|
|
|
STR(r, FP, d);
|
2008-09-02 22:29:23 -07:00
|
|
|
freeRsrcOf(ins, false); // if we had a reg in use, emit a ST to flush it to mem
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_store32(LIns *value, int dr, LIns *base)
|
|
|
|
{
|
|
|
|
// make sure what is in a register
|
|
|
|
Reservation *rA, *rB;
|
|
|
|
findRegFor2(GpRegs, value, rA, base, rB);
|
|
|
|
Register ra = rA->reg;
|
|
|
|
Register rb = rB->reg;
|
2008-09-02 22:29:23 -07:00
|
|
|
STR(ra, rb, dr);
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_restore(LInsp i, Reservation *resv, Register r)
|
|
|
|
{
|
|
|
|
(void)resv;
|
|
|
|
int d = findMemFor(i);
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
if (IsFpReg(r)) {
|
|
|
|
if (isS8(d >> 2)) {
|
|
|
|
FLDD(r, FP, d);
|
|
|
|
} else {
|
|
|
|
FLDD(r, Scratch, 0);
|
|
|
|
arm_ADDi(Scratch, FP, d);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
LDR(r, FP, d);
|
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
verbose_only(
|
|
|
|
if (_verbose)
|
|
|
|
outputf(" restore %s",_thisfrag->lirbuf->names->formatRef(i));
|
|
|
|
)
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_spill(LInsp i, Reservation *resv, bool pop)
|
|
|
|
{
|
|
|
|
(void)i;
|
|
|
|
(void)pop;
|
2008-09-02 22:29:23 -07:00
|
|
|
//fprintf (stderr, "resv->arIndex: %d\n", resv->arIndex);
|
2008-09-02 22:29:23 -07:00
|
|
|
if (resv->arIndex) {
|
|
|
|
int d = disp(resv);
|
|
|
|
// save to spill location
|
|
|
|
Register rr = resv->reg;
|
2008-09-02 22:29:23 -07:00
|
|
|
if (IsFpReg(rr)) {
|
|
|
|
if (isS8(d >> 2)) {
|
|
|
|
FSTD(rr, FP, d);
|
|
|
|
} else {
|
|
|
|
FSTD(rr, Scratch, 0);
|
|
|
|
arm_ADDi(Scratch, FP, d);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
STR(rr, FP, d);
|
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
verbose_only(if (_verbose){
|
|
|
|
outputf(" spill %s",_thisfrag->lirbuf->names->formatRef(i));
|
|
|
|
}
|
|
|
|
)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_load64(LInsp ins)
|
|
|
|
{
|
2008-09-02 22:29:23 -07:00
|
|
|
///asm_output("<<< load64");
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
LIns* base = ins->oprnd1();
|
2008-09-02 22:29:23 -07:00
|
|
|
int offset = ins->oprnd2()->constval();
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
Reservation *resv = getresv(ins);
|
2008-09-02 22:29:23 -07:00
|
|
|
Register rr = resv->reg;
|
|
|
|
int d = disp(resv);
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
freeRsrcOf(ins, false);
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
#ifdef NJ_ARM_VFP
|
|
|
|
Register rb = findRegFor(base, GpRegs);
|
|
|
|
|
|
|
|
NanoAssert(rb != UnknownReg);
|
|
|
|
NanoAssert(rr == UnknownReg || IsFpReg(rr));
|
|
|
|
|
|
|
|
if (rr != UnknownReg) {
|
|
|
|
if (!isS8(offset >> 2) || (offset&3) != 0) {
|
|
|
|
underrunProtect(LD32_size + 8);
|
|
|
|
FLDD(rr,Scratch,0);
|
|
|
|
ADD(Scratch, rb);
|
|
|
|
LD32_nochk(Scratch, offset);
|
|
|
|
} else {
|
|
|
|
FLDD(rr,rb,offset);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
asm_mmq(FP, d, rb, offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
// *(FP+dr) <- *(rb+db)
|
|
|
|
#else
|
|
|
|
NanoAssert(resv->reg == UnknownReg && d != 0);
|
|
|
|
Register rb = findRegFor(base, GpRegs);
|
|
|
|
asm_mmq(FP, d, rb, offset);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
//asm_output(">>> load64");
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_store64(LInsp value, int dr, LInsp base)
|
|
|
|
{
|
2008-09-02 22:29:23 -07:00
|
|
|
//asm_output1("<<< store64 (dr: %d)", dr);
|
|
|
|
|
|
|
|
#ifdef NJ_ARM_VFP
|
|
|
|
Reservation *valResv = getresv(value);
|
|
|
|
|
|
|
|
Register rb = findRegFor(base, GpRegs);
|
|
|
|
Register rv = findRegFor(value, FpRegs);
|
|
|
|
|
|
|
|
NanoAssert(rb != UnknownReg);
|
|
|
|
NanoAssert(rv != UnknownReg);
|
|
|
|
|
|
|
|
Register baseReg = rb;
|
|
|
|
intptr_t baseOffset = dr;
|
|
|
|
|
|
|
|
if (!isS8(dr)) {
|
|
|
|
baseReg = Scratch;
|
|
|
|
baseOffset = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
FSTD(rv, baseReg, baseOffset);
|
|
|
|
|
|
|
|
if (!isS8(dr)) {
|
|
|
|
underrunProtect(4 + LD32_size);
|
|
|
|
ADD(Scratch, rb);
|
|
|
|
LD32_nochk(Scratch, dr);
|
|
|
|
}
|
|
|
|
|
|
|
|
// if it's a constant, make sure our baseReg/baseOffset location
|
|
|
|
// has the right value
|
|
|
|
if (value->isconstq()) {
|
|
|
|
const int32_t* p = (const int32_t*) (value-2);
|
|
|
|
|
2008-09-05 17:15:23 -07:00
|
|
|
underrunProtect(12);
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
asm_quad_nochk(rv, p);
|
|
|
|
}
|
|
|
|
#else
|
2008-09-02 22:29:23 -07:00
|
|
|
int da = findMemFor(value);
|
|
|
|
Register rb = findRegFor(base, GpRegs);
|
|
|
|
asm_mmq(rb, dr, FP, da);
|
2008-09-02 22:29:23 -07:00
|
|
|
#endif
|
|
|
|
//asm_output(">>> store64");
|
|
|
|
}
|
|
|
|
|
|
|
|
// stick a quad into register rr, where p points to the two
|
|
|
|
// 32-bit parts of the quad, optinally also storing at FP+d
|
|
|
|
void
|
|
|
|
Assembler::asm_quad_nochk(Register rr, const int32_t* p)
|
|
|
|
{
|
2008-09-05 17:15:23 -07:00
|
|
|
// We're not going to use a slot, because it might be too far
|
|
|
|
// away. Instead, we're going to stick a branch in the stream to
|
|
|
|
// jump over the constants, and then load from a short PC relative
|
|
|
|
// offset.
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-05 17:15:23 -07:00
|
|
|
// stream should look like:
|
|
|
|
// branch A
|
|
|
|
// p[0]
|
|
|
|
// p[1]
|
|
|
|
// A: FLDD PC-16
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-05 17:15:23 -07:00
|
|
|
FLDD(rr, PC, -16);
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-05 17:15:23 -07:00
|
|
|
*(--_nIns) = (NIns) p[1];
|
|
|
|
*(--_nIns) = (NIns) p[0];
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-05 17:15:23 -07:00
|
|
|
JMP_nochk(_nIns+2);
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_quad(LInsp ins)
|
|
|
|
{
|
2008-09-02 22:29:23 -07:00
|
|
|
//asm_output(">>> asm_quad");
|
|
|
|
|
|
|
|
Reservation *res = getresv(ins);
|
|
|
|
int d = disp(res);
|
|
|
|
Register rr = res->reg;
|
|
|
|
|
|
|
|
NanoAssert(d || rr != UnknownReg);
|
|
|
|
|
|
|
|
const int32_t* p = (const int32_t*) (ins-2);
|
|
|
|
|
|
|
|
#ifdef NJ_ARM_VFP
|
2008-09-02 22:29:23 -07:00
|
|
|
freeRsrcOf(ins, false);
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
// XXX We probably want nochk versions of FLDD/FSTD
|
2008-09-05 17:15:23 -07:00
|
|
|
underrunProtect(d ? 20 : 16);
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
// grab a register to do the load into if we don't have one already;
|
|
|
|
// XXX -- maybe do a mmq in this case? We're going to use our
|
|
|
|
// D7 register that's never allocated (since it's the one we use
|
|
|
|
// for int-to-double conversions), so we don't have to worry about
|
|
|
|
// spilling something in a fp reg.
|
|
|
|
if (rr == UnknownReg)
|
|
|
|
rr = D7;
|
|
|
|
|
|
|
|
if (d)
|
|
|
|
FSTD(rr, FP, d);
|
|
|
|
|
|
|
|
asm_quad_nochk(rr, p);
|
|
|
|
#else
|
|
|
|
freeRsrcOf(ins, false);
|
2008-09-02 22:29:23 -07:00
|
|
|
if (d) {
|
2008-09-02 22:29:23 -07:00
|
|
|
underrunProtect(LD32_size * 2 + 8);
|
|
|
|
STR(Scratch, FP, d+4);
|
|
|
|
LD32_nochk(Scratch, p[1]);
|
|
|
|
STR(Scratch, FP, d);
|
|
|
|
LD32_nochk(Scratch, p[0]);
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
#endif
|
|
|
|
|
|
|
|
//asm_output("<<< asm_quad");
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
Assembler::asm_qlo(LInsp ins, LInsp q)
|
|
|
|
{
|
|
|
|
(void)ins; (void)q;
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_nongp_copy(Register r, Register s)
|
|
|
|
{
|
2008-09-02 22:29:23 -07:00
|
|
|
if ((rmask(r) & FpRegs) && (rmask(s) & FpRegs)) {
|
|
|
|
// fp->fp
|
|
|
|
FCPYD(r, s);
|
|
|
|
} else if ((rmask(r) & GpRegs) && (rmask(s) & FpRegs)) {
|
|
|
|
// fp->gp
|
|
|
|
// who's doing this and why?
|
|
|
|
NanoAssert(0);
|
|
|
|
// FMRS(r, loSingleVfp(s));
|
|
|
|
} else {
|
|
|
|
NanoAssert(0);
|
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
Register
|
|
|
|
Assembler::asm_binop_rhs_reg(LInsp ins)
|
|
|
|
{
|
|
|
|
return UnknownReg;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* copy 64 bits: (rd+dd) <- (rs+ds)
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
Assembler::asm_mmq(Register rd, int dd, Register rs, int ds)
|
|
|
|
{
|
|
|
|
// value is either a 64bit struct or maybe a float
|
|
|
|
// that isn't live in an FPU reg. Either way, don't
|
|
|
|
// put it in an FPU reg just to load & store it.
|
|
|
|
// get a scratch reg
|
|
|
|
Register t = registerAlloc(GpRegs & ~(rmask(rd)|rmask(rs)));
|
|
|
|
_allocator.addFree(t);
|
2008-09-02 22:29:23 -07:00
|
|
|
// XXX use LDM,STM
|
|
|
|
STR(t, rd, dd+4);
|
|
|
|
LDR(t, rs, ds+4);
|
|
|
|
STR(t, rd, dd);
|
|
|
|
LDR(t, rs, ds);
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2008-09-02 22:29:23 -07:00
|
|
|
Assembler::asm_pusharg(LInsp arg)
|
2008-09-02 22:29:23 -07:00
|
|
|
{
|
2008-09-02 22:29:23 -07:00
|
|
|
Reservation* argRes = getresv(arg);
|
|
|
|
bool quad = arg->isQuad();
|
|
|
|
intptr_t stack_growth = quad ? 8 : 4;
|
|
|
|
|
|
|
|
Register ra;
|
|
|
|
|
|
|
|
if (argRes)
|
|
|
|
ra = argRes->reg;
|
2008-09-02 22:29:23 -07:00
|
|
|
else
|
2008-09-02 22:29:23 -07:00
|
|
|
ra = findRegFor(arg, quad ? FpRegs : GpRegs);
|
|
|
|
|
|
|
|
if (ra == UnknownReg) {
|
|
|
|
STR(Scratch, SP, 0);
|
|
|
|
LDR(Scratch, FP, disp(argRes));
|
|
|
|
} else {
|
|
|
|
if (!quad) {
|
|
|
|
Register ra = findRegFor(arg, GpRegs);
|
|
|
|
STR(ra, SP, 0);
|
|
|
|
} else {
|
|
|
|
Register ra = findRegFor(arg, FpRegs);
|
|
|
|
FSTD(ra, SP, 0);
|
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
SUBi(SP, stack_growth);
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
void
|
|
|
|
Assembler::nativePageReset()
|
|
|
|
{
|
|
|
|
_nSlot = 0;
|
|
|
|
_nExitSlot = 0;
|
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
void
|
|
|
|
Assembler::nativePageSetup()
|
|
|
|
{
|
|
|
|
if (!_nIns) _nIns = pageAlloc();
|
|
|
|
if (!_nExitIns) _nExitIns = pageAlloc(true);
|
|
|
|
//fprintf(stderr, "assemble onto %x exits into %x\n", (int)_nIns, (int)_nExitIns);
|
|
|
|
|
|
|
|
if (!_nSlot)
|
2008-09-02 22:29:23 -07:00
|
|
|
{
|
2008-09-02 22:29:23 -07:00
|
|
|
// This needs to be done or the samepage macro gets confused; pageAlloc
|
|
|
|
// gives us a pointer to just past the end of the page.
|
|
|
|
_nIns--;
|
|
|
|
_nExitIns--;
|
|
|
|
|
|
|
|
// constpool starts at top of page and goes down,
|
|
|
|
// code starts at bottom of page and moves up
|
|
|
|
_nSlot = pageDataStart(_nIns); //(int*)(&((Page*)pageTop(_nIns))->lir[0]);
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
NIns*
|
|
|
|
Assembler::asm_adjustBranch(NIns* at, NIns* target)
|
|
|
|
{
|
|
|
|
// This always got emitted as a BL_far sequence; at points
|
|
|
|
// to the first of 4 instructions. Ensure that we're where
|
|
|
|
// we think we were..
|
|
|
|
NanoAssert(at[1] == (NIns)( COND_AL | OP_IMM | (1<<23) | (PC<<16) | (LR<<12) | (4) ));
|
|
|
|
NanoAssert(at[2] == (NIns)( COND_AL | (0x9<<21) | (0xFFF<<8) | (1<<4) | (IP) ));
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
NIns* was = (NIns*) at[3];
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
//fprintf (stderr, "Adjusting branch @ 0x%8x: 0x%x -> 0x%x\n", at+3, at[3], target);
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
at[3] = (NIns)target;
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
#if defined(UNDER_CE)
|
|
|
|
// we changed the code, so we need to do this (sadly)
|
|
|
|
FlushInstructionCache(GetCurrentProcess(), NULL, NULL);
|
|
|
|
#elif defined(AVMPLUS_LINUX)
|
|
|
|
__clear_cache((char*)at, (char*)(at+4));
|
|
|
|
#endif
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
#ifdef AVMPLUS_PORTING_API
|
2008-09-02 22:29:23 -07:00
|
|
|
NanoJIT_PortAPI_FlushInstructionCache(at, at+4);
|
2008-09-02 22:29:23 -07:00
|
|
|
#endif
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
return was;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::underrunProtect(int bytes)
|
|
|
|
{
|
|
|
|
intptr_t u = bytes + sizeof(PageHeader)/sizeof(NIns) + 8;
|
|
|
|
if ( (samepage(_nIns,_nSlot) && (((intptr_t)_nIns-u) <= intptr_t(_nSlot+1))) ||
|
|
|
|
(!samepage((intptr_t)_nIns-u,_nIns)) )
|
|
|
|
{
|
|
|
|
NIns* target = _nIns;
|
|
|
|
|
|
|
|
_nIns = pageAlloc(_inExit);
|
|
|
|
|
|
|
|
// XXX _nIns at this point points to one past the end of
|
|
|
|
// the page, intended to be written into using *(--_nIns).
|
|
|
|
// However, (guess) something seems to be storing the value
|
|
|
|
// of _nIns as is, and then later generating a jump to a bogus
|
|
|
|
// address. So pre-decrement to ensure that it's always
|
|
|
|
// valid; we end up skipping using the last instruction this
|
|
|
|
// way.
|
|
|
|
_nIns--;
|
|
|
|
|
|
|
|
// Update slot, either to _nIns (if decremented above), or
|
|
|
|
// _nIns-1 once the above bug is fixed/found.
|
|
|
|
_nSlot = pageDataStart(_nIns);
|
|
|
|
|
|
|
|
// If samepage() is used on _nIns and _nSlot, it'll fail, since _nIns
|
|
|
|
// points to one past the end of the page right now. Assume that
|
|
|
|
// JMP_nochk won't ever try to write to _nSlot, and so won't ever
|
|
|
|
// check samepage(). See B_cond_chk macro.
|
|
|
|
JMP_nochk(target);
|
|
|
|
} else if (!_nSlot) {
|
|
|
|
// make sure that there's always a slot pointer
|
|
|
|
_nSlot = pageDataStart(_nIns);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::BL_far(NIns* addr)
|
|
|
|
{
|
|
|
|
// we have to stick an immediate into the stream and make lr
|
|
|
|
// point to the right spot before branching
|
|
|
|
underrunProtect(16);
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
// TODO use a slot in const pool for address, but emit single insn
|
|
|
|
// for branch if offset fits
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
// the address
|
|
|
|
*(--_nIns) = (NIns)((addr));
|
|
|
|
// bx ip // branch to the address we loaded earlier
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | (0x9<<21) | (0xFFF<<8) | (1<<4) | (IP) );
|
|
|
|
// add lr, [pc + #4] // set lr to be past the address that we wrote
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | OP_IMM | (1<<23) | (PC<<16) | (LR<<12) | (4) );
|
|
|
|
// ldr ip, [pc + #4] // load the address into ip, reading it from [pc+4]
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | (0x59<<20) | (PC<<16) | (IP<<12) | (4));
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
//fprintf (stderr, "BL_far sequence @ 0x%08x\n", _nIns);
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
asm_output1("bl %p (32-bit)", addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::BL(NIns* addr)
|
|
|
|
{
|
2008-09-02 22:29:23 -07:00
|
|
|
intptr_t offs = PC_OFFSET_FROM(addr,_nIns-1);
|
|
|
|
|
|
|
|
//fprintf (stderr, "BL: 0x%x (offs: %d [%x]) @ 0x%08x\n", addr, offs, offs, (intptr_t)(_nIns-1));
|
|
|
|
|
|
|
|
if (isS24(offs)) {
|
|
|
|
// try to do this with a single S24 call;
|
|
|
|
// recompute offset in case underrunProtect had to allocate a new page
|
2008-09-02 22:29:23 -07:00
|
|
|
underrunProtect(4);
|
2008-09-02 22:29:23 -07:00
|
|
|
offs = PC_OFFSET_FROM(addr,_nIns-1);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (isS24(offs)) {
|
|
|
|
// already did underrunProtect above
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | (0xB<<24) | (((offs)>>2) & 0xFFFFFF) );
|
2008-09-02 22:29:23 -07:00
|
|
|
asm_output1("bl %p", addr);
|
|
|
|
} else {
|
|
|
|
BL_far(addr);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::CALL(const CallInfo *ci)
|
|
|
|
{
|
|
|
|
intptr_t addr = ci->_address;
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
BL((NIns*)addr);
|
|
|
|
asm_output1(" (call %s)", ci->_name);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::LD32_nochk(Register r, int32_t imm)
|
|
|
|
{
|
2008-09-02 22:29:23 -07:00
|
|
|
// We should always reach the const pool, since it's on the same page (<4096);
|
|
|
|
// if we can't, someone didn't underrunProtect enough.
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
*(++_nSlot) = (int)imm;
|
|
|
|
|
|
|
|
//fprintf (stderr, "wrote slot(2) %p with %08x, jmp @ %p\n", _nSlot, (intptr_t)imm, _nIns-1);
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
int offset = PC_OFFSET_FROM(_nSlot,_nIns-1);
|
|
|
|
|
|
|
|
NanoAssert(isS12(offset) && (offset < 0));
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
asm_output2(" (%d(PC) = 0x%x)", offset, imm);
|
2008-09-02 22:29:23 -07:00
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
LDR_nochk(r,PC,offset);
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
// Branch to target address _t with condition _c, doing underrun
|
|
|
|
// checks (_chk == 1) or skipping them (_chk == 0).
|
|
|
|
//
|
|
|
|
// If the jump fits in a relative jump (+/-32MB), emit that.
|
|
|
|
// If the jump is unconditional, emit the dest address inline in
|
|
|
|
// the instruction stream and load it into pc.
|
|
|
|
// If the jump has a condition, but noone's mucked with _nIns and our _nSlot
|
|
|
|
// pointer is valid, stick the constant in the slot and emit a conditional
|
|
|
|
// load into pc.
|
|
|
|
// Otherwise, emit the conditional load into pc from a nearby constant,
|
|
|
|
// and emit a jump to jump over it it in case the condition fails.
|
|
|
|
//
|
|
|
|
// NB: JMP_nochk depends on this not calling samepage() when _c == AL
|
|
|
|
void
|
|
|
|
Assembler::B_cond_chk(ConditionCode _c, NIns* _t, bool _chk)
|
|
|
|
{
|
|
|
|
int32 offs = PC_OFFSET_FROM(_t,_nIns-1);
|
|
|
|
//fprintf(stderr, "B_cond_chk target: 0x%08x offset: %d @0x%08x\n", _t, offs, _nIns-1);
|
|
|
|
if (isS24(offs)) {
|
|
|
|
if (_chk) underrunProtect(4);
|
|
|
|
offs = PC_OFFSET_FROM(_t,_nIns-1);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (isS24(offs)) {
|
|
|
|
*(--_nIns) = (NIns)( ((_c)<<28) | (0xA<<24) | (((offs)>>2) & 0xFFFFFF) );
|
|
|
|
} else if (_c == AL) {
|
|
|
|
if(_chk) underrunProtect(8);
|
|
|
|
*(--_nIns) = (NIns)(_t);
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | (0x51<<20) | (PC<<16) | (PC<<12) | 0x4 );
|
|
|
|
} else if (samepage(_nIns,_nSlot)) {
|
|
|
|
if(_chk) underrunProtect(8);
|
|
|
|
*(++_nSlot) = (NIns)(_t);
|
|
|
|
offs = PC_OFFSET_FROM(_nSlot,_nIns-1);
|
|
|
|
NanoAssert(offs < 0);
|
|
|
|
*(--_nIns) = (NIns)( ((_c)<<28) | (0x51<<20) | (PC<<16) | (PC<<12) | ((-offs) & 0xFFFFFF) );
|
|
|
|
} else {
|
|
|
|
if(_chk) underrunProtect(12);
|
|
|
|
*(--_nIns) = (NIns)(_t);
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | (0xA<<24) | ((-4)>>2) & 0xFFFFFF );
|
|
|
|
*(--_nIns) = (NIns)( ((_c)<<28) | (0x51<<20) | (PC<<16) | (PC<<12) | 0x0 );
|
|
|
|
}
|
|
|
|
|
|
|
|
asm_output2("%s %p", _c == AL ? "jmp" : "b(cnd)", (void*)(_t));
|
|
|
|
}
|
|
|
|
|
2008-09-05 17:14:05 -07:00
|
|
|
void
|
|
|
|
Assembler::asm_add_imm(Register rd, Register rn, int32_t imm)
|
|
|
|
{
|
|
|
|
|
|
|
|
int rot = 16;
|
|
|
|
uint32_t immval;
|
|
|
|
bool pos;
|
|
|
|
|
|
|
|
if (imm >= 0) {
|
|
|
|
immval = (uint32_t) imm;
|
|
|
|
pos = true;
|
|
|
|
} else {
|
|
|
|
immval = (uint32_t) (-imm);
|
|
|
|
pos = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (immval && ((immval & 0x3) == 0)) {
|
|
|
|
immval >>= 2;
|
|
|
|
rot--;
|
|
|
|
}
|
|
|
|
|
|
|
|
rot &= 0xf;
|
|
|
|
|
|
|
|
if (immval < 256) {
|
|
|
|
underrunProtect(4);
|
|
|
|
if (pos)
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | OP_IMM | OP_STAT | (1<<23) | (rn<<16) | (rd<<12) | (rot << 8) | immval );
|
|
|
|
else
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | OP_IMM | OP_STAT | (1<<22) | (rn<<16) | (rd<<12) | (rot << 8) | immval );
|
|
|
|
asm_output3("add %s,%s,%d",gpn(rd),gpn(rn),imm);
|
|
|
|
} else {
|
|
|
|
// add scratch to rn, after loading the value into scratch.
|
|
|
|
|
|
|
|
// make sure someone isn't trying to use Scratch as an operand
|
|
|
|
NanoAssert(rn != Scratch);
|
|
|
|
|
|
|
|
*(--_nIns) = (NIns)( COND_AL | OP_STAT | (1<<23) | (rn<<16) | (rd<<12) | (Scratch));
|
|
|
|
asm_output3("add %s,%s,%s",gpn(rd),gpn(rn),gpn(Scratch));
|
|
|
|
|
|
|
|
LD32_nochk(Scratch, imm);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-09-02 22:29:23 -07:00
|
|
|
/*
|
|
|
|
* VFP
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifdef NJ_ARM_VFP
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_i2f(LInsp ins)
|
|
|
|
{
|
|
|
|
Register rr = prepResultReg(ins, FpRegs);
|
|
|
|
Register srcr = findRegFor(ins->oprnd1(), GpRegs);
|
|
|
|
|
|
|
|
// todo: support int value in memory, as per x86
|
|
|
|
NanoAssert(srcr != UnknownReg);
|
|
|
|
|
|
|
|
FSITOD(rr, FpSingleScratch);
|
|
|
|
FMSR(FpSingleScratch, srcr);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_u2f(LInsp ins)
|
|
|
|
{
|
|
|
|
Register rr = prepResultReg(ins, FpRegs);
|
|
|
|
Register sr = findRegFor(ins->oprnd1(), GpRegs);
|
|
|
|
|
|
|
|
// todo: support int value in memory, as per x86
|
|
|
|
NanoAssert(sr != UnknownReg);
|
|
|
|
|
|
|
|
FUITOD(rr, FpSingleScratch);
|
|
|
|
FMSR(FpSingleScratch, sr);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_fneg(LInsp ins)
|
|
|
|
{
|
|
|
|
LInsp lhs = ins->oprnd1();
|
|
|
|
Register rr = prepResultReg(ins, FpRegs);
|
|
|
|
|
|
|
|
Reservation* rA = getresv(lhs);
|
|
|
|
Register sr;
|
|
|
|
|
|
|
|
if (!rA || rA->reg == UnknownReg)
|
|
|
|
sr = findRegFor(lhs, FpRegs);
|
|
|
|
else
|
|
|
|
sr = rA->reg;
|
|
|
|
|
|
|
|
FNEGD(rr, sr);
|
2008-09-02 22:29:23 -07:00
|
|
|
}
|
2008-09-02 22:29:23 -07:00
|
|
|
|
|
|
|
void
|
|
|
|
Assembler::asm_fop(LInsp ins)
|
|
|
|
{
|
|
|
|
LInsp lhs = ins->oprnd1();
|
|
|
|
LInsp rhs = ins->oprnd2();
|
|
|
|
LOpcode op = ins->opcode();
|
|
|
|
|
|
|
|
NanoAssert(op >= LIR_fadd && op <= LIR_fdiv);
|
|
|
|
|
|
|
|
// rr = ra OP rb
|
|
|
|
|
|
|
|
Register rr = prepResultReg(ins, FpRegs);
|
|
|
|
|
|
|
|
Register ra = findRegFor(lhs, FpRegs);
|
|
|
|
Register rb = (rhs == lhs) ? ra : findRegFor(rhs, FpRegs);
|
|
|
|
|
|
|
|
// XXX special-case 1.0 and 0.0
|
|
|
|
|
|
|
|
if (op == LIR_fadd)
|
|
|
|
FADDD(rr,ra,rb);
|
|
|
|
else if (op == LIR_fsub)
|
|
|
|
FSUBD(rr,ra,rb);
|
|
|
|
else if (op == LIR_fmul)
|
|
|
|
FMULD(rr,ra,rb);
|
|
|
|
else //if (op == LIR_fdiv)
|
|
|
|
FDIVD(rr,ra,rb);
|
|
|
|
}
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void
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|
|
Assembler::asm_fcmp(LInsp ins)
|
|
|
|
{
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|
|
|
LInsp lhs = ins->oprnd1();
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|
|
LInsp rhs = ins->oprnd2();
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|
|
LOpcode op = ins->opcode();
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|
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NanoAssert(op >= LIR_feq && op <= LIR_fge);
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|
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Register ra = findRegFor(lhs, FpRegs);
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|
|
Register rb = findRegFor(rhs, FpRegs);
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|
|
|
// We can't uniquely identify fge/fle via a single bit
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|
|
// pattern (since equality and lt/gt are separate bits);
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|
|
// so convert to the single-bit variant.
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|
|
if (op == LIR_fge) {
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|
|
Register temp = ra;
|
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|
|
ra = rb;
|
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|
|
rb = temp;
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|
|
op = LIR_flt;
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|
|
} else if (op == LIR_fle) {
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|
|
|
Register temp = ra;
|
|
|
|
ra = rb;
|
|
|
|
rb = temp;
|
|
|
|
op = LIR_fgt;
|
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|
|
}
|
|
|
|
|
|
|
|
// There is no way to test for an unordered result using
|
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|
|
// the conditional form of an instruction; the encoding (C=1 V=1)
|
|
|
|
// ends up having overlaps with a few other tests. So, test for
|
|
|
|
// the explicit mask.
|
|
|
|
uint8_t mask = 0x0;
|
|
|
|
|
|
|
|
// NZCV
|
|
|
|
// for a valid ordered result, V is always 0 from VFP
|
|
|
|
if (op == LIR_feq)
|
|
|
|
// ZC // cond EQ (both equal and "not less than"
|
|
|
|
mask = 0x6;
|
|
|
|
else if (op == LIR_flt)
|
|
|
|
// N // cond MI
|
|
|
|
mask = 0x8;
|
|
|
|
else if (op == LIR_fgt)
|
|
|
|
// C // cond CS
|
|
|
|
mask = 0x2;
|
|
|
|
else
|
|
|
|
NanoAssert(0);
|
|
|
|
/*
|
|
|
|
// these were converted into gt and lt above.
|
|
|
|
if (op == LIR_fle)
|
|
|
|
// NZ // cond LE
|
|
|
|
mask = 0xC;
|
|
|
|
else if (op == LIR_fge)
|
|
|
|
// ZC // cond fail?
|
|
|
|
mask = 0x6;
|
|
|
|
*/
|
|
|
|
|
|
|
|
// TODO XXX could do this as fcmpd; fmstat; tstvs rX, #0 the tstvs
|
|
|
|
// would reset the status bits if V (NaN flag) is set, but that
|
|
|
|
// doesn't work for NE. For NE could teqvs rX, #1. rX needs to
|
|
|
|
// be any register that has lsb == 0, such as sp/fp/pc.
|
|
|
|
|
|
|
|
// Test explicily with the full mask; if V is set, test will fail.
|
|
|
|
// Assumption is that this will be followed up by a BEQ/BNE
|
|
|
|
CMPi(Scratch, mask);
|
|
|
|
// grab just the condition fields
|
|
|
|
SHRi(Scratch, 28);
|
|
|
|
MRS(Scratch);
|
|
|
|
|
|
|
|
// do the comparison and get results loaded in ARM status register
|
|
|
|
FMSTAT();
|
|
|
|
FCMPD(ra, rb);
|
|
|
|
}
|
|
|
|
|
|
|
|
Register
|
|
|
|
Assembler::asm_prep_fcall(Reservation* rR, LInsp ins)
|
|
|
|
{
|
|
|
|
// We have nothing to do here; we do it all in asm_call.
|
|
|
|
return UnknownReg;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* NJ_ARM_VFP */
|
|
|
|
|
|
|
|
}
|
|
|
|
#endif /* FEATURE_NANOJIT */
|