/* * Copyright (C) 2011, 2013 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef FPRInfo_h #define FPRInfo_h #include "MacroAssembler.h" #include namespace JSC { typedef MacroAssembler::FPRegisterID FPRReg; #define InvalidFPRReg ((::JSC::FPRReg)-1) #if ENABLE(JIT) #if CPU(X86) || CPU(X86_64) class FPRInfo { public: typedef FPRReg RegisterType; static const unsigned numberOfRegisters = 6; // Temporary registers. static const FPRReg fpRegT0 = X86Registers::xmm0; static const FPRReg fpRegT1 = X86Registers::xmm1; static const FPRReg fpRegT2 = X86Registers::xmm2; static const FPRReg fpRegT3 = X86Registers::xmm3; static const FPRReg fpRegT4 = X86Registers::xmm4; static const FPRReg fpRegT5 = X86Registers::xmm5; #if CPU(X86_64) // Only X86_64 passes aguments in xmm registers static const FPRReg argumentFPR0 = X86Registers::xmm0; // fpRegT0 static const FPRReg argumentFPR1 = X86Registers::xmm1; // fpRegT1 static const FPRReg argumentFPR2 = X86Registers::xmm2; // fpRegT2 static const FPRReg argumentFPR3 = X86Registers::xmm3; // fpRegT3 #endif // On X86 the return will actually be on the x87 stack, // so we'll copy to xmm0 for sanity! static const FPRReg returnValueFPR = X86Registers::xmm0; // fpRegT0 // FPRReg mapping is direct, the machine regsiter numbers can // be used directly as indices into the FPR RegisterBank. COMPILE_ASSERT(X86Registers::xmm0 == 0, xmm0_is_0); COMPILE_ASSERT(X86Registers::xmm1 == 1, xmm1_is_1); COMPILE_ASSERT(X86Registers::xmm2 == 2, xmm2_is_2); COMPILE_ASSERT(X86Registers::xmm3 == 3, xmm3_is_3); COMPILE_ASSERT(X86Registers::xmm4 == 4, xmm4_is_4); COMPILE_ASSERT(X86Registers::xmm5 == 5, xmm5_is_5); static FPRReg toRegister(unsigned index) { return (FPRReg)index; } static unsigned toIndex(FPRReg reg) { unsigned result = (unsigned)reg; if (result >= numberOfRegisters) return InvalidIndex; return result; } static FPRReg toArgumentRegister(unsigned index) { return (FPRReg)index; } static const char* debugName(FPRReg reg) { ASSERT(reg != InvalidFPRReg); #if CPU(X86_64) ASSERT(static_cast(reg) (reg) (reg) (reg) (reg)