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Bochs/bochs/cpu/xmm.h

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/////////////////////////////////////////////////////////////////////////
// $Id: xmm.h,v 1.29 2009-07-08 14:02:41 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2003 Stanislav Shwartsman
// Written by Stanislav Shwartsman [sshwarts at sourceforge net]
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA
//
/////////////////////////////////////////////////////////////////////////
#ifndef BX_SSE_EXTENSIONS_H
#define BX_SSE_EXTENSIONS_H
/* XMM REGISTER */
typedef union bx_xmm_reg_t {
Bit8s _sbyte[16];
Bit16s _s16[8];
Bit32s _s32[4];
Bit64s _s64[2];
Bit8u _ubyte[16];
Bit16u _u16[8];
Bit32u _u32[4];
Bit64u _u64[2];
} BxPackedXmmRegister;
#ifdef BX_BIG_ENDIAN
#define xmm64s(i) _s64[1 - (i)]
#define xmm32s(i) _s32[3 - (i)]
#define xmm16s(i) _s16[7 - (i)]
#define xmmsbyte(i) _sbyte[15 - (i)]
#define xmmubyte(i) _ubyte[15 - (i)]
#define xmm16u(i) _u16[7 - (i)]
#define xmm32u(i) _u32[3 - (i)]
#define xmm64u(i) _u64[1 - (i)]
#else
#define xmm64s(i) _s64[(i)]
#define xmm32s(i) _s32[(i)]
#define xmm16s(i) _s16[(i)]
#define xmmsbyte(i) _sbyte[(i)]
#define xmmubyte(i) _ubyte[(i)]
#define xmm16u(i) _u16[(i)]
#define xmm32u(i) _u32[(i)]
#define xmm64u(i) _u64[(i)]
#endif
#if BX_SUPPORT_SSE >= 1
#if BX_SUPPORT_X86_64
# define BX_XMM_REGISTERS 16
#else
# define BX_XMM_REGISTERS 8
#endif
/* read XMM register */
#define BX_READ_XMM_REG(index) (BX_CPU_THIS_PTR xmm[index])
/* read only high 64 bit of the register */
#define BX_READ_XMM_REG_HI_QWORD(index) \
((BX_CPU_THIS_PTR xmm[index]).xmm64u(1))
/* read only low 64 bit of the register */
#define BX_READ_XMM_REG_LO_QWORD(index) \
((BX_CPU_THIS_PTR xmm[index]).xmm64u(0))
/* read only low 32 bit of the register */
#define BX_READ_XMM_REG_LO_DWORD(index) \
((BX_CPU_THIS_PTR xmm[index]).xmm32u(0))
/* read only low 16 bit of the register */
#define BX_READ_XMM_REG_LO_WORD(index) \
((BX_CPU_THIS_PTR xmm[index]).xmm16u(0))
/* short names for above macroses */
#define BX_XMM_REG_HI_QWORD BX_READ_XMM_REG_HI_QWORD
#define BX_XMM_REG_LO_QWORD BX_READ_XMM_REG_LO_QWORD
#define BX_XMM_REG_LO_DWORD BX_READ_XMM_REG_LO_DWORD
/* store XMM register */
#define BX_WRITE_XMM_REG(index, reg) \
{ BX_CPU_THIS_PTR xmm[index] = (reg); }
/* store only high 64 bit of the register, rest of the register unchanged */
#define BX_WRITE_XMM_REG_HI_QWORD(index, reg64) \
{ (BX_CPU_THIS_PTR xmm[index]).xmm64u(1) = (reg64); }
/* store only low 64 bit of the register, rest of the register unchanged */
#define BX_WRITE_XMM_REG_LO_QWORD(index, reg64) \
{ (BX_CPU_THIS_PTR xmm[index]).xmm64u(0) = (reg64); }
/* store only low 32 bit of the register, rest of the register unchanged */
#define BX_WRITE_XMM_REG_LO_DWORD(index, reg32) \
{ (BX_CPU_THIS_PTR xmm[index]).xmm32u(0) = (reg32); }
/* MXCSR REGISTER */
/* 31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16
* ==|==|=====|==|==|==|==|==|==|==|==|==|==|==|== (reserved)
* 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|MM| 0
*
* 15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0
* ==|==|=====|==|==|==|==|==|==|==|==|==|==|==|==
* FZ| R C |PM|UM|OM|ZM|DM|IM|DZ|PE|UE|OE|ZE|DE|IE
*/
/* MXCSR REGISTER FIELDS DESCRIPTION */
/*
* IE 0 Invalid-Operation Exception 0
* DE 1 Denormalized-Operand Exception 0
* ZE 2 Zero-Divide Exception 0
* OE 3 Overflow Exception 0
* UE 4 Underflow Exception 0
* PE 5 Precision Exception 0
* DZ 6 Denormals are Zeros 0
* IM 7 Invalid-Operation Exception Mask 1
* DM 8 Denormalized-Operand Exception Mask 1
* ZM 9 Zero-Divide Exception Mask 1
* OM 10 Overflow Exception Mask 1
* UM 11 Underflow Exception Mask 1
* PM 12 Precision Exception Mask 1
* RC 13-14 Floating-Point Rounding Control 00
* FZ 15 Flush-to-Zero for Masked Underflow 0
* RZ 16 Reserved 0
* MM 17 Misaligned Exceptuion Mask 0
*/
#define MXCSR_EXCEPTIONS 0x0000003F
#define MXCSR_DAZ 0x00000040
#define MXCSR_MASKED_EXCEPTIONS 0x00001F80
#define MXCSR_ROUNDING_CONTROL 0x00006000
#define MXCSR_FLUSH_MASKED_UNDERFLOW 0x00008000
#define MXCSR_MISALIGNED_EXCEPTION_MASK 0x00020000
#define MXCSR_IE 0x00000001
#define MXCSR_DE 0x00000002
#define MXCSR_ZE 0x00000004
#define MXCSR_OE 0x00000008
#define MXCSR_UE 0x00000010
#define MXCSR_PE 0x00000020
#define MXCSR_IM 0x00000080
#define MXCSR_DM 0x00000100
#define MXCSR_ZM 0x00000200
#define MXCSR_OM 0x00000400
#define MXCSR_UM 0x00000800
#define MXCSR_PM 0x00001000
#define MXCSR_RESET 0x00001F80 /* reset value of the MXCSR register */
struct BOCHSAPI bx_mxcsr_t
{
Bit32u mxcsr;
bx_mxcsr_t (Bit32u val = MXCSR_RESET)
: mxcsr(val) {}
#define IMPLEMENT_MXCSR_ACCESSOR(name, bitmask, bitnum) \
int get_##name () const { \
return (mxcsr & (bitmask)) >> (bitnum); \
}
IMPLEMENT_MXCSR_ACCESSOR(exceptions_masks, MXCSR_MASKED_EXCEPTIONS, 7);
IMPLEMENT_MXCSR_ACCESSOR(DAZ, MXCSR_DAZ, 6);
IMPLEMENT_MXCSR_ACCESSOR(rounding_mode, MXCSR_ROUNDING_CONTROL, 13);
IMPLEMENT_MXCSR_ACCESSOR(flush_masked_underflow, MXCSR_FLUSH_MASKED_UNDERFLOW, 15);
IMPLEMENT_MXCSR_ACCESSOR(misaligned_exception_mask, MXCSR_MISALIGNED_EXCEPTION_MASK, 17);
IMPLEMENT_MXCSR_ACCESSOR(IE, MXCSR_IE, 0);
IMPLEMENT_MXCSR_ACCESSOR(DE, MXCSR_DE, 1);
IMPLEMENT_MXCSR_ACCESSOR(ZE, MXCSR_ZE, 2);
IMPLEMENT_MXCSR_ACCESSOR(OE, MXCSR_OE, 3);
IMPLEMENT_MXCSR_ACCESSOR(UE, MXCSR_UE, 4);
IMPLEMENT_MXCSR_ACCESSOR(PE, MXCSR_PE, 5);
IMPLEMENT_MXCSR_ACCESSOR(IM, MXCSR_IM, 7);
IMPLEMENT_MXCSR_ACCESSOR(DM, MXCSR_DM, 8);
IMPLEMENT_MXCSR_ACCESSOR(ZM, MXCSR_ZM, 9);
IMPLEMENT_MXCSR_ACCESSOR(OM, MXCSR_OM, 10);
IMPLEMENT_MXCSR_ACCESSOR(UM, MXCSR_UM, 11);
IMPLEMENT_MXCSR_ACCESSOR(PM, MXCSR_PM, 12);
void set_exceptions(int status) {
mxcsr |= (status & MXCSR_EXCEPTIONS);
}
};
/* reset reserved bits */
#define MXCSR_MASK (0x0000FFBF | \
((BX_SUPPORT_SSE >= 2) ? MXCSR_DAZ : 0) | \
((BX_SUPPORT_MISALIGNED_SSE) ? MXCSR_MISALIGNED_EXCEPTION_MASK : 0))
#if defined(NEED_CPU_REG_SHORTCUTS)
#define MXCSR (BX_CPU_THIS_PTR mxcsr)
#define BX_MXCSR_REGISTER (BX_CPU_THIS_PTR mxcsr.mxcsr)
#endif
#endif // BX_SUPPORT_SSE
/* INTEGER SATURATION */
/*
* SaturateWordSToByteS converts a signed 16-bit value to a signed
* 8-bit value. If the signed 16-bit value is less than -128, it is
* represented by the saturated value -128 (0x80). If it is greater
* than 127, it is represented by the saturated value 127 (0x7F).
*/
BX_CPP_INLINE Bit8s BX_CPP_AttrRegparmN(1) SaturateWordSToByteS(Bit16s value)
{
if(value < -128) return -128;
if(value > 127) return 127;
return (Bit8s) value;
}
/*
* SaturateDwordSToWordS converts a signed 32-bit value to a signed
* 16-bit value. If the signed 32-bit value is less than -32768, it is
* represented by the saturated value -32768 (0x8000). If it is greater
* than 32767, it is represented by the saturated value 32767 (0x7FFF).
*/
BX_CPP_INLINE Bit16s BX_CPP_AttrRegparmN(1) SaturateDwordSToWordS(Bit32s value)
{
if(value < -32768) return -32768;
if(value > 32767) return 32767;
return (Bit16s) value;
}
/*
* SaturateWordSToByteU converts a signed 16-bit value to an unsigned
* 8-bit value. If the signed 16-bit value is less than zero it is
* represented by the saturated value zero (0x00).If it is greater than
* 255 it is represented by the saturated value 255 (0xFF).
*/
BX_CPP_INLINE Bit8u BX_CPP_AttrRegparmN(1) SaturateWordSToByteU(Bit16s value)
{
if(value < 0) return 0;
if(value > 255) return 255;
return (Bit8u) value;
}
/*
* SaturateDwordSToWordU converts a signed 32-bit value to an unsigned
* 16-bit value. If the signed 32-bit value is less than zero, it is
* represented by the saturated value zero (0x0000). If it is greater
* than 65535, it is represented by the saturated value 65535 (0xFFFF).
*/
BX_CPP_INLINE Bit16u BX_CPP_AttrRegparmN(1) SaturateDwordSToWordU(Bit32s value)
{
if(value < 0) return 0;
if(value > 65535) return 65535;
return (Bit16u) value;
}
#endif
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