hotspot/src/cpu/x86/vm/c1_LIR_x86.cpp
author kbarrett
Wed, 15 Feb 2017 22:19:13 -0500
changeset 43964 2f5e556a6037
parent 40071 53e12df44b7b
permissions -rw-r--r--
8166188: G1 Needs pre barrier on dereference of weak JNI handles Summary: Add low tag to jweaks and G1 barrier for jweak loads. Reviewed-by: mgerdin, mdoerr, pliden, dlong, dcubed, coleenp, aph, tschatzl Contributed-by: kim.barrett@oracle.com, martin.doerr@sap.com, volker.simonis@sap.com

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "precompiled.hpp"
#include "asm/register.hpp"
#include "c1/c1_FrameMap.hpp"
#include "c1/c1_LIR.hpp"


FloatRegister LIR_OprDesc::as_float_reg() const {
  ShouldNotReachHere();
  return fnoreg;
}

FloatRegister LIR_OprDesc::as_double_reg() const {
  ShouldNotReachHere();
  return fnoreg;
}

XMMRegister LIR_OprDesc::as_xmm_float_reg() const {
  return FrameMap::nr2xmmreg(xmm_regnr());
}

XMMRegister LIR_OprDesc::as_xmm_double_reg() const {
  assert(xmm_regnrLo() == xmm_regnrHi(), "assumed in calculation");
  return FrameMap::nr2xmmreg(xmm_regnrLo());
}

// Reg2 unused.
LIR_Opr LIR_OprFact::double_fpu(int reg1, int reg2) {
  assert(as_FloatRegister(reg2) == fnoreg, "Not used on this platform");
  return (LIR_Opr)(intptr_t)((reg1 << LIR_OprDesc::reg1_shift) |
                             (reg1 << LIR_OprDesc::reg2_shift) |
                             LIR_OprDesc::double_type          |
                             LIR_OprDesc::fpu_register         |
                             LIR_OprDesc::double_size);
}

#ifndef PRODUCT
void LIR_Address::verify() const {
#ifdef _LP64
  assert(base()->is_cpu_register(), "wrong base operand");
  assert(index()->is_illegal() || index()->is_double_cpu(), "wrong index operand");
  assert(base()->type() == T_OBJECT || base()->type() == T_LONG || base()->type() == T_METADATA,
         "wrong type for addresses");
#else
  assert(base()->is_single_cpu(), "wrong base operand");
  assert(index()->is_illegal() || index()->is_single_cpu(), "wrong index operand");
  assert(base()->type() == T_OBJECT || base()->type() == T_INT || base()->type() == T_METADATA,
         "wrong type for addresses");
#endif
}
#endif // PRODUCT