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cpu.h
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cpu.h
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/*
* i386 virtual CPU header
*
* Copyright (c) 2003 Fabrice Bellard
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef I386_CPU_H
#define I386_CPU_H
#include "sysemu/tcg.h"
#include "cpu-qom.h"
#include "hyperv-proto.h"
#include "exec/cpu-defs.h"
/* The x86 has a strong memory model with some store-after-load re-ordering */
#define TCG_GUEST_DEFAULT_MO (TCG_MO_ALL & ~TCG_MO_ST_LD)
/* Maximum instruction code size */
#define TARGET_MAX_INSN_SIZE 16
/* support for self modifying code even if the modified instruction is
close to the modifying instruction */
#define TARGET_HAS_PRECISE_SMC
#ifdef TARGET_X86_64
#define I386_ELF_MACHINE EM_X86_64
#define ELF_MACHINE_UNAME "x86_64"
#else
#define I386_ELF_MACHINE EM_386
#define ELF_MACHINE_UNAME "i686"
#endif
enum {
R_EAX = 0,
R_ECX = 1,
R_EDX = 2,
R_EBX = 3,
R_ESP = 4,
R_EBP = 5,
R_ESI = 6,
R_EDI = 7,
R_R8 = 8,
R_R9 = 9,
R_R10 = 10,
R_R11 = 11,
R_R12 = 12,
R_R13 = 13,
R_R14 = 14,
R_R15 = 15,
R_AL = 0,
R_CL = 1,
R_DL = 2,
R_BL = 3,
R_AH = 4,
R_CH = 5,
R_DH = 6,
R_BH = 7,
};
typedef enum X86Seg {
R_ES = 0,
R_CS = 1,
R_SS = 2,
R_DS = 3,
R_FS = 4,
R_GS = 5,
R_LDTR = 6,
R_TR = 7,
} X86Seg;
/* segment descriptor fields */
#define DESC_G_SHIFT 23
#define DESC_G_MASK (1 << DESC_G_SHIFT)
#define DESC_B_SHIFT 22
#define DESC_B_MASK (1 << DESC_B_SHIFT)
#define DESC_L_SHIFT 21 /* x86_64 only : 64 bit code segment */
#define DESC_L_MASK (1 << DESC_L_SHIFT)
#define DESC_AVL_SHIFT 20
#define DESC_AVL_MASK (1 << DESC_AVL_SHIFT)
#define DESC_P_SHIFT 15
#define DESC_P_MASK (1 << DESC_P_SHIFT)
#define DESC_DPL_SHIFT 13
#define DESC_DPL_MASK (3 << DESC_DPL_SHIFT)
#define DESC_S_SHIFT 12
#define DESC_S_MASK (1 << DESC_S_SHIFT)
#define DESC_TYPE_SHIFT 8
#define DESC_TYPE_MASK (15 << DESC_TYPE_SHIFT)
#define DESC_A_MASK (1 << 8)
#define DESC_CS_MASK (1 << 11) /* 1=code segment 0=data segment */
#define DESC_C_MASK (1 << 10) /* code: conforming */
#define DESC_R_MASK (1 << 9) /* code: readable */
#define DESC_E_MASK (1 << 10) /* data: expansion direction */
#define DESC_W_MASK (1 << 9) /* data: writable */
#define DESC_TSS_BUSY_MASK (1 << 9)
/* eflags masks */
#define CC_C 0x0001
#define CC_P 0x0004
#define CC_A 0x0010
#define CC_Z 0x0040
#define CC_S 0x0080
#define CC_O 0x0800
#define TF_SHIFT 8
#define IOPL_SHIFT 12
#define VM_SHIFT 17
#define TF_MASK 0x00000100
#define IF_MASK 0x00000200
#define DF_MASK 0x00000400
#define IOPL_MASK 0x00003000
#define NT_MASK 0x00004000
#define RF_MASK 0x00010000
#define VM_MASK 0x00020000
#define AC_MASK 0x00040000
#define VIF_MASK 0x00080000
#define VIP_MASK 0x00100000
#define ID_MASK 0x00200000
/* hidden flags - used internally by qemu to represent additional cpu
states. Only the INHIBIT_IRQ, SMM and SVMI are not redundant. We
avoid using the IOPL_MASK, TF_MASK, VM_MASK and AC_MASK bit
positions to ease oring with eflags. */
/* current cpl */
#define HF_CPL_SHIFT 0
/* true if hardware interrupts must be disabled for next instruction */
#define HF_INHIBIT_IRQ_SHIFT 3
/* 16 or 32 segments */
#define HF_CS32_SHIFT 4
#define HF_SS32_SHIFT 5
/* zero base for DS, ES and SS : can be '0' only in 32 bit CS segment */
#define HF_ADDSEG_SHIFT 6
/* copy of CR0.PE (protected mode) */
#define HF_PE_SHIFT 7
#define HF_TF_SHIFT 8 /* must be same as eflags */
#define HF_MP_SHIFT 9 /* the order must be MP, EM, TS */
#define HF_EM_SHIFT 10
#define HF_TS_SHIFT 11
#define HF_IOPL_SHIFT 12 /* must be same as eflags */
#define HF_LMA_SHIFT 14 /* only used on x86_64: long mode active */
#define HF_CS64_SHIFT 15 /* only used on x86_64: 64 bit code segment */
#define HF_RF_SHIFT 16 /* must be same as eflags */
#define HF_VM_SHIFT 17 /* must be same as eflags */
#define HF_AC_SHIFT 18 /* must be same as eflags */
#define HF_SMM_SHIFT 19 /* CPU in SMM mode */
#define HF_SVME_SHIFT 20 /* SVME enabled (copy of EFER.SVME) */
#define HF_GUEST_SHIFT 21 /* SVM intercepts are active */
#define HF_OSFXSR_SHIFT 22 /* CR4.OSFXSR */
#define HF_SMAP_SHIFT 23 /* CR4.SMAP */
#define HF_IOBPT_SHIFT 24 /* an io breakpoint enabled */
#define HF_MPX_EN_SHIFT 25 /* MPX Enabled (CR4+XCR0+BNDCFGx) */
#define HF_MPX_IU_SHIFT 26 /* BND registers in-use */
#define HF_CPL_MASK (3 << HF_CPL_SHIFT)
#define HF_INHIBIT_IRQ_MASK (1 << HF_INHIBIT_IRQ_SHIFT)
#define HF_CS32_MASK (1 << HF_CS32_SHIFT)
#define HF_SS32_MASK (1 << HF_SS32_SHIFT)
#define HF_ADDSEG_MASK (1 << HF_ADDSEG_SHIFT)
#define HF_PE_MASK (1 << HF_PE_SHIFT)
#define HF_TF_MASK (1 << HF_TF_SHIFT)
#define HF_MP_MASK (1 << HF_MP_SHIFT)
#define HF_EM_MASK (1 << HF_EM_SHIFT)
#define HF_TS_MASK (1 << HF_TS_SHIFT)
#define HF_IOPL_MASK (3 << HF_IOPL_SHIFT)
#define HF_LMA_MASK (1 << HF_LMA_SHIFT)
#define HF_CS64_MASK (1 << HF_CS64_SHIFT)
#define HF_RF_MASK (1 << HF_RF_SHIFT)
#define HF_VM_MASK (1 << HF_VM_SHIFT)
#define HF_AC_MASK (1 << HF_AC_SHIFT)
#define HF_SMM_MASK (1 << HF_SMM_SHIFT)
#define HF_SVME_MASK (1 << HF_SVME_SHIFT)
#define HF_GUEST_MASK (1 << HF_GUEST_SHIFT)
#define HF_OSFXSR_MASK (1 << HF_OSFXSR_SHIFT)
#define HF_SMAP_MASK (1 << HF_SMAP_SHIFT)
#define HF_IOBPT_MASK (1 << HF_IOBPT_SHIFT)
#define HF_MPX_EN_MASK (1 << HF_MPX_EN_SHIFT)
#define HF_MPX_IU_MASK (1 << HF_MPX_IU_SHIFT)
/* hflags2 */
#define HF2_GIF_SHIFT 0 /* if set CPU takes interrupts */
#define HF2_HIF_SHIFT 1 /* value of IF_MASK when entering SVM */
#define HF2_NMI_SHIFT 2 /* CPU serving NMI */
#define HF2_VINTR_SHIFT 3 /* value of V_INTR_MASKING bit */
#define HF2_SMM_INSIDE_NMI_SHIFT 4 /* CPU serving SMI nested inside NMI */
#define HF2_MPX_PR_SHIFT 5 /* BNDCFGx.BNDPRESERVE */
#define HF2_NPT_SHIFT 6 /* Nested Paging enabled */
#define HF2_GIF_MASK (1 << HF2_GIF_SHIFT)
#define HF2_HIF_MASK (1 << HF2_HIF_SHIFT)
#define HF2_NMI_MASK (1 << HF2_NMI_SHIFT)
#define HF2_VINTR_MASK (1 << HF2_VINTR_SHIFT)
#define HF2_SMM_INSIDE_NMI_MASK (1 << HF2_SMM_INSIDE_NMI_SHIFT)
#define HF2_MPX_PR_MASK (1 << HF2_MPX_PR_SHIFT)
#define HF2_NPT_MASK (1 << HF2_NPT_SHIFT)
#define CR0_PE_SHIFT 0
#define CR0_MP_SHIFT 1
#define CR0_PE_MASK (1U << 0)
#define CR0_MP_MASK (1U << 1)
#define CR0_EM_MASK (1U << 2)
#define CR0_TS_MASK (1U << 3)
#define CR0_ET_MASK (1U << 4)
#define CR0_NE_MASK (1U << 5)
#define CR0_WP_MASK (1U << 16)
#define CR0_AM_MASK (1U << 18)
#define CR0_PG_MASK (1U << 31)
#define CR4_VME_MASK (1U << 0)
#define CR4_PVI_MASK (1U << 1)
#define CR4_TSD_MASK (1U << 2)
#define CR4_DE_MASK (1U << 3)
#define CR4_PSE_MASK (1U << 4)
#define CR4_PAE_MASK (1U << 5)
#define CR4_MCE_MASK (1U << 6)
#define CR4_PGE_MASK (1U << 7)
#define CR4_PCE_MASK (1U << 8)
#define CR4_OSFXSR_SHIFT 9
#define CR4_OSFXSR_MASK (1U << CR4_OSFXSR_SHIFT)
#define CR4_OSXMMEXCPT_MASK (1U << 10)
#define CR4_LA57_MASK (1U << 12)
#define CR4_VMXE_MASK (1U << 13)
#define CR4_SMXE_MASK (1U << 14)
#define CR4_FSGSBASE_MASK (1U << 16)
#define CR4_PCIDE_MASK (1U << 17)
#define CR4_OSXSAVE_MASK (1U << 18)
#define CR4_SMEP_MASK (1U << 20)
#define CR4_SMAP_MASK (1U << 21)
#define CR4_PKE_MASK (1U << 22)
#define DR6_BD (1 << 13)
#define DR6_BS (1 << 14)
#define DR6_BT (1 << 15)
#define DR6_FIXED_1 0xffff0ff0
#define DR7_GD (1 << 13)
#define DR7_TYPE_SHIFT 16
#define DR7_LEN_SHIFT 18
#define DR7_FIXED_1 0x00000400
#define DR7_GLOBAL_BP_MASK 0xaa
#define DR7_LOCAL_BP_MASK 0x55
#define DR7_MAX_BP 4
#define DR7_TYPE_BP_INST 0x0
#define DR7_TYPE_DATA_WR 0x1
#define DR7_TYPE_IO_RW 0x2
#define DR7_TYPE_DATA_RW 0x3
#define PG_PRESENT_BIT 0
#define PG_RW_BIT 1
#define PG_USER_BIT 2
#define PG_PWT_BIT 3
#define PG_PCD_BIT 4
#define PG_ACCESSED_BIT 5
#define PG_DIRTY_BIT 6
#define PG_PSE_BIT 7
#define PG_GLOBAL_BIT 8
#define PG_PSE_PAT_BIT 12
#define PG_PKRU_BIT 59
#define PG_NX_BIT 63
#define PG_PRESENT_MASK (1 << PG_PRESENT_BIT)
#define PG_RW_MASK (1 << PG_RW_BIT)
#define PG_USER_MASK (1 << PG_USER_BIT)
#define PG_PWT_MASK (1 << PG_PWT_BIT)
#define PG_PCD_MASK (1 << PG_PCD_BIT)
#define PG_ACCESSED_MASK (1 << PG_ACCESSED_BIT)
#define PG_DIRTY_MASK (1 << PG_DIRTY_BIT)
#define PG_PSE_MASK (1 << PG_PSE_BIT)
#define PG_GLOBAL_MASK (1 << PG_GLOBAL_BIT)
#define PG_PSE_PAT_MASK (1 << PG_PSE_PAT_BIT)
#define PG_ADDRESS_MASK 0x000ffffffffff000LL
#define PG_HI_RSVD_MASK (PG_ADDRESS_MASK & ~PHYS_ADDR_MASK)
#define PG_HI_USER_MASK 0x7ff0000000000000LL
#define PG_PKRU_MASK (15ULL << PG_PKRU_BIT)
#define PG_NX_MASK (1ULL << PG_NX_BIT)
#define PG_ERROR_W_BIT 1
#define PG_ERROR_P_MASK 0x01
#define PG_ERROR_W_MASK (1 << PG_ERROR_W_BIT)
#define PG_ERROR_U_MASK 0x04
#define PG_ERROR_RSVD_MASK 0x08
#define PG_ERROR_I_D_MASK 0x10
#define PG_ERROR_PK_MASK 0x20
#define MCG_CTL_P (1ULL<<8) /* MCG_CAP register available */
#define MCG_SER_P (1ULL<<24) /* MCA recovery/new status bits */
#define MCG_LMCE_P (1ULL<<27) /* Local Machine Check Supported */
#define MCE_CAP_DEF (MCG_CTL_P|MCG_SER_P)
#define MCE_BANKS_DEF 10
#define MCG_CAP_BANKS_MASK 0xff
#define MCG_STATUS_RIPV (1ULL<<0) /* restart ip valid */
#define MCG_STATUS_EIPV (1ULL<<1) /* ip points to correct instruction */
#define MCG_STATUS_MCIP (1ULL<<2) /* machine check in progress */
#define MCG_STATUS_LMCE (1ULL<<3) /* Local MCE signaled */
#define MCG_EXT_CTL_LMCE_EN (1ULL<<0) /* Local MCE enabled */
#define MCI_STATUS_VAL (1ULL<<63) /* valid error */
#define MCI_STATUS_OVER (1ULL<<62) /* previous errors lost */
#define MCI_STATUS_UC (1ULL<<61) /* uncorrected error */
#define MCI_STATUS_EN (1ULL<<60) /* error enabled */
#define MCI_STATUS_MISCV (1ULL<<59) /* misc error reg. valid */
#define MCI_STATUS_ADDRV (1ULL<<58) /* addr reg. valid */
#define MCI_STATUS_PCC (1ULL<<57) /* processor context corrupt */
#define MCI_STATUS_S (1ULL<<56) /* Signaled machine check */
#define MCI_STATUS_AR (1ULL<<55) /* Action required */
/* MISC register defines */
#define MCM_ADDR_SEGOFF 0 /* segment offset */
#define MCM_ADDR_LINEAR 1 /* linear address */
#define MCM_ADDR_PHYS 2 /* physical address */
#define MCM_ADDR_MEM 3 /* memory address */
#define MCM_ADDR_GENERIC 7 /* generic */
#define MSR_IA32_TSC 0x10
#define MSR_IA32_APICBASE 0x1b
#define MSR_IA32_APICBASE_BSP (1<<8)
#define MSR_IA32_APICBASE_ENABLE (1<<11)
#define MSR_IA32_APICBASE_EXTD (1 << 10)
#define MSR_IA32_APICBASE_BASE (0xfffffU<<12)
#define MSR_IA32_FEATURE_CONTROL 0x0000003a
#define MSR_TSC_ADJUST 0x0000003b
#define MSR_IA32_SPEC_CTRL 0x48
#define MSR_VIRT_SSBD 0xc001011f
#define MSR_IA32_PRED_CMD 0x49
#define MSR_IA32_CORE_CAPABILITY 0xcf
#define MSR_IA32_ARCH_CAPABILITIES 0x10a
#define MSR_IA32_TSCDEADLINE 0x6e0
#define FEATURE_CONTROL_LOCKED (1<<0)
#define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX (1<<2)
#define FEATURE_CONTROL_LMCE (1<<20)
#define MSR_P6_PERFCTR0 0xc1
#define MSR_IA32_SMBASE 0x9e
#define MSR_SMI_COUNT 0x34
#define MSR_MTRRcap 0xfe
#define MSR_MTRRcap_VCNT 8
#define MSR_MTRRcap_FIXRANGE_SUPPORT (1 << 8)
#define MSR_MTRRcap_WC_SUPPORTED (1 << 10)
#define MSR_IA32_SYSENTER_CS 0x174
#define MSR_IA32_SYSENTER_ESP 0x175
#define MSR_IA32_SYSENTER_EIP 0x176
#define MSR_MCG_CAP 0x179
#define MSR_MCG_STATUS 0x17a
#define MSR_MCG_CTL 0x17b
#define MSR_MCG_EXT_CTL 0x4d0
#define MSR_P6_EVNTSEL0 0x186
#define MSR_IA32_PERF_STATUS 0x198
#define MSR_IA32_MISC_ENABLE 0x1a0
/* Indicates good rep/movs microcode on some processors: */
#define MSR_IA32_MISC_ENABLE_DEFAULT 1
#define MSR_IA32_MISC_ENABLE_MWAIT (1ULL << 18)
#define MSR_MTRRphysBase(reg) (0x200 + 2 * (reg))
#define MSR_MTRRphysMask(reg) (0x200 + 2 * (reg) + 1)
#define MSR_MTRRphysIndex(addr) ((((addr) & ~1u) - 0x200) / 2)
#define MSR_MTRRfix64K_00000 0x250
#define MSR_MTRRfix16K_80000 0x258
#define MSR_MTRRfix16K_A0000 0x259
#define MSR_MTRRfix4K_C0000 0x268
#define MSR_MTRRfix4K_C8000 0x269
#define MSR_MTRRfix4K_D0000 0x26a
#define MSR_MTRRfix4K_D8000 0x26b
#define MSR_MTRRfix4K_E0000 0x26c
#define MSR_MTRRfix4K_E8000 0x26d
#define MSR_MTRRfix4K_F0000 0x26e
#define MSR_MTRRfix4K_F8000 0x26f
#define MSR_PAT 0x277
#define MSR_MTRRdefType 0x2ff
#define MSR_CORE_PERF_FIXED_CTR0 0x309
#define MSR_CORE_PERF_FIXED_CTR1 0x30a
#define MSR_CORE_PERF_FIXED_CTR2 0x30b
#define MSR_CORE_PERF_FIXED_CTR_CTRL 0x38d
#define MSR_CORE_PERF_GLOBAL_STATUS 0x38e
#define MSR_CORE_PERF_GLOBAL_CTRL 0x38f
#define MSR_CORE_PERF_GLOBAL_OVF_CTRL 0x390
#define MSR_MC0_CTL 0x400
#define MSR_MC0_STATUS 0x401
#define MSR_MC0_ADDR 0x402
#define MSR_MC0_MISC 0x403
#define MSR_IA32_RTIT_OUTPUT_BASE 0x560
#define MSR_IA32_RTIT_OUTPUT_MASK 0x561
#define MSR_IA32_RTIT_CTL 0x570
#define MSR_IA32_RTIT_STATUS 0x571
#define MSR_IA32_RTIT_CR3_MATCH 0x572
#define MSR_IA32_RTIT_ADDR0_A 0x580
#define MSR_IA32_RTIT_ADDR0_B 0x581
#define MSR_IA32_RTIT_ADDR1_A 0x582
#define MSR_IA32_RTIT_ADDR1_B 0x583
#define MSR_IA32_RTIT_ADDR2_A 0x584
#define MSR_IA32_RTIT_ADDR2_B 0x585
#define MSR_IA32_RTIT_ADDR3_A 0x586
#define MSR_IA32_RTIT_ADDR3_B 0x587
#define MAX_RTIT_ADDRS 8
#define MSR_EFER 0xc0000080
#define MSR_EFER_SCE (1 << 0)
#define MSR_EFER_LME (1 << 8)
#define MSR_EFER_LMA (1 << 10)
#define MSR_EFER_NXE (1 << 11)
#define MSR_EFER_SVME (1 << 12)
#define MSR_EFER_FFXSR (1 << 14)
#define MSR_STAR 0xc0000081
#define MSR_LSTAR 0xc0000082
#define MSR_CSTAR 0xc0000083
#define MSR_FMASK 0xc0000084
#define MSR_FSBASE 0xc0000100
#define MSR_GSBASE 0xc0000101
#define MSR_KERNELGSBASE 0xc0000102
#define MSR_TSC_AUX 0xc0000103
#define MSR_VM_HSAVE_PA 0xc0010117
#define MSR_IA32_BNDCFGS 0x00000d90
#define MSR_IA32_XSS 0x00000da0
#define XSTATE_FP_BIT 0
#define XSTATE_SSE_BIT 1
#define XSTATE_YMM_BIT 2
#define XSTATE_BNDREGS_BIT 3
#define XSTATE_BNDCSR_BIT 4
#define XSTATE_OPMASK_BIT 5
#define XSTATE_ZMM_Hi256_BIT 6
#define XSTATE_Hi16_ZMM_BIT 7
#define XSTATE_PKRU_BIT 9
#define XSTATE_FP_MASK (1ULL << XSTATE_FP_BIT)
#define XSTATE_SSE_MASK (1ULL << XSTATE_SSE_BIT)
#define XSTATE_YMM_MASK (1ULL << XSTATE_YMM_BIT)
#define XSTATE_BNDREGS_MASK (1ULL << XSTATE_BNDREGS_BIT)
#define XSTATE_BNDCSR_MASK (1ULL << XSTATE_BNDCSR_BIT)
#define XSTATE_OPMASK_MASK (1ULL << XSTATE_OPMASK_BIT)
#define XSTATE_ZMM_Hi256_MASK (1ULL << XSTATE_ZMM_Hi256_BIT)
#define XSTATE_Hi16_ZMM_MASK (1ULL << XSTATE_Hi16_ZMM_BIT)
#define XSTATE_PKRU_MASK (1ULL << XSTATE_PKRU_BIT)
/* CPUID feature words */
typedef enum FeatureWord {
FEAT_1_EDX, /* CPUID[1].EDX */
FEAT_1_ECX, /* CPUID[1].ECX */
FEAT_7_0_EBX, /* CPUID[EAX=7,ECX=0].EBX */
FEAT_7_0_ECX, /* CPUID[EAX=7,ECX=0].ECX */
FEAT_7_0_EDX, /* CPUID[EAX=7,ECX=0].EDX */
FEAT_8000_0001_EDX, /* CPUID[8000_0001].EDX */
FEAT_8000_0001_ECX, /* CPUID[8000_0001].ECX */
FEAT_8000_0007_EDX, /* CPUID[8000_0007].EDX */
FEAT_8000_0008_EBX, /* CPUID[8000_0008].EBX */
FEAT_C000_0001_EDX, /* CPUID[C000_0001].EDX */
FEAT_KVM, /* CPUID[4000_0001].EAX (KVM_CPUID_FEATURES) */
FEAT_KVM_HINTS, /* CPUID[4000_0001].EDX */
FEAT_HYPERV_EAX, /* CPUID[4000_0003].EAX */
FEAT_HYPERV_EBX, /* CPUID[4000_0003].EBX */
FEAT_HYPERV_EDX, /* CPUID[4000_0003].EDX */
FEAT_HV_RECOMM_EAX, /* CPUID[4000_0004].EAX */
FEAT_HV_NESTED_EAX, /* CPUID[4000_000A].EAX */
FEAT_SVM, /* CPUID[8000_000A].EDX */
FEAT_XSAVE, /* CPUID[EAX=0xd,ECX=1].EAX */
FEAT_6_EAX, /* CPUID[6].EAX */
FEAT_XSAVE_COMP_LO, /* CPUID[EAX=0xd,ECX=0].EAX */
FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
FEAT_ARCH_CAPABILITIES,
FEAT_CORE_CAPABILITY,
FEATURE_WORDS,
} FeatureWord;
typedef uint32_t FeatureWordArray[FEATURE_WORDS];
/* cpuid_features bits */
#define CPUID_FP87 (1U << 0)
#define CPUID_VME (1U << 1)
#define CPUID_DE (1U << 2)
#define CPUID_PSE (1U << 3)
#define CPUID_TSC (1U << 4)
#define CPUID_MSR (1U << 5)
#define CPUID_PAE (1U << 6)
#define CPUID_MCE (1U << 7)
#define CPUID_CX8 (1U << 8)
#define CPUID_APIC (1U << 9)
#define CPUID_SEP (1U << 11) /* sysenter/sysexit */
#define CPUID_MTRR (1U << 12)
#define CPUID_PGE (1U << 13)
#define CPUID_MCA (1U << 14)
#define CPUID_CMOV (1U << 15)
#define CPUID_PAT (1U << 16)
#define CPUID_PSE36 (1U << 17)
#define CPUID_PN (1U << 18)
#define CPUID_CLFLUSH (1U << 19)
#define CPUID_DTS (1U << 21)
#define CPUID_ACPI (1U << 22)
#define CPUID_MMX (1U << 23)
#define CPUID_FXSR (1U << 24)
#define CPUID_SSE (1U << 25)
#define CPUID_SSE2 (1U << 26)
#define CPUID_SS (1U << 27)
#define CPUID_HT (1U << 28)
#define CPUID_TM (1U << 29)
#define CPUID_IA64 (1U << 30)
#define CPUID_PBE (1U << 31)
#define CPUID_EXT_SSE3 (1U << 0)
#define CPUID_EXT_PCLMULQDQ (1U << 1)
#define CPUID_EXT_DTES64 (1U << 2)
#define CPUID_EXT_MONITOR (1U << 3)
#define CPUID_EXT_DSCPL (1U << 4)
#define CPUID_EXT_VMX (1U << 5)
#define CPUID_EXT_SMX (1U << 6)
#define CPUID_EXT_EST (1U << 7)
#define CPUID_EXT_TM2 (1U << 8)
#define CPUID_EXT_SSSE3 (1U << 9)
#define CPUID_EXT_CID (1U << 10)
#define CPUID_EXT_FMA (1U << 12)
#define CPUID_EXT_CX16 (1U << 13)
#define CPUID_EXT_XTPR (1U << 14)
#define CPUID_EXT_PDCM (1U << 15)
#define CPUID_EXT_PCID (1U << 17)
#define CPUID_EXT_DCA (1U << 18)
#define CPUID_EXT_SSE41 (1U << 19)
#define CPUID_EXT_SSE42 (1U << 20)
#define CPUID_EXT_X2APIC (1U << 21)
#define CPUID_EXT_MOVBE (1U << 22)
#define CPUID_EXT_POPCNT (1U << 23)
#define CPUID_EXT_TSC_DEADLINE_TIMER (1U << 24)
#define CPUID_EXT_AES (1U << 25)
#define CPUID_EXT_XSAVE (1U << 26)
#define CPUID_EXT_OSXSAVE (1U << 27)
#define CPUID_EXT_AVX (1U << 28)
#define CPUID_EXT_F16C (1U << 29)
#define CPUID_EXT_RDRAND (1U << 30)
#define CPUID_EXT_HYPERVISOR (1U << 31)
#define CPUID_EXT2_FPU (1U << 0)
#define CPUID_EXT2_VME (1U << 1)
#define CPUID_EXT2_DE (1U << 2)
#define CPUID_EXT2_PSE (1U << 3)
#define CPUID_EXT2_TSC (1U << 4)
#define CPUID_EXT2_MSR (1U << 5)
#define CPUID_EXT2_PAE (1U << 6)
#define CPUID_EXT2_MCE (1U << 7)
#define CPUID_EXT2_CX8 (1U << 8)
#define CPUID_EXT2_APIC (1U << 9)
#define CPUID_EXT2_SYSCALL (1U << 11)
#define CPUID_EXT2_MTRR (1U << 12)
#define CPUID_EXT2_PGE (1U << 13)
#define CPUID_EXT2_MCA (1U << 14)
#define CPUID_EXT2_CMOV (1U << 15)
#define CPUID_EXT2_PAT (1U << 16)
#define CPUID_EXT2_PSE36 (1U << 17)
#define CPUID_EXT2_MP (1U << 19)
#define CPUID_EXT2_NX (1U << 20)
#define CPUID_EXT2_MMXEXT (1U << 22)
#define CPUID_EXT2_MMX (1U << 23)
#define CPUID_EXT2_FXSR (1U << 24)
#define CPUID_EXT2_FFXSR (1U << 25)
#define CPUID_EXT2_PDPE1GB (1U << 26)
#define CPUID_EXT2_RDTSCP (1U << 27)
#define CPUID_EXT2_LM (1U << 29)
#define CPUID_EXT2_3DNOWEXT (1U << 30)
#define CPUID_EXT2_3DNOW (1U << 31)
/* CPUID[8000_0001].EDX bits that are aliase of CPUID[1].EDX bits on AMD CPUs */
#define CPUID_EXT2_AMD_ALIASES (CPUID_EXT2_FPU | CPUID_EXT2_VME | \
CPUID_EXT2_DE | CPUID_EXT2_PSE | \
CPUID_EXT2_TSC | CPUID_EXT2_MSR | \
CPUID_EXT2_PAE | CPUID_EXT2_MCE | \
CPUID_EXT2_CX8 | CPUID_EXT2_APIC | \
CPUID_EXT2_MTRR | CPUID_EXT2_PGE | \
CPUID_EXT2_MCA | CPUID_EXT2_CMOV | \
CPUID_EXT2_PAT | CPUID_EXT2_PSE36 | \
CPUID_EXT2_MMX | CPUID_EXT2_FXSR)
#define CPUID_EXT3_LAHF_LM (1U << 0)
#define CPUID_EXT3_CMP_LEG (1U << 1)
#define CPUID_EXT3_SVM (1U << 2)
#define CPUID_EXT3_EXTAPIC (1U << 3)
#define CPUID_EXT3_CR8LEG (1U << 4)
#define CPUID_EXT3_ABM (1U << 5)
#define CPUID_EXT3_SSE4A (1U << 6)
#define CPUID_EXT3_MISALIGNSSE (1U << 7)
#define CPUID_EXT3_3DNOWPREFETCH (1U << 8)
#define CPUID_EXT3_OSVW (1U << 9)
#define CPUID_EXT3_IBS (1U << 10)
#define CPUID_EXT3_XOP (1U << 11)
#define CPUID_EXT3_SKINIT (1U << 12)
#define CPUID_EXT3_WDT (1U << 13)
#define CPUID_EXT3_LWP (1U << 15)
#define CPUID_EXT3_FMA4 (1U << 16)
#define CPUID_EXT3_TCE (1U << 17)
#define CPUID_EXT3_NODEID (1U << 19)
#define CPUID_EXT3_TBM (1U << 21)
#define CPUID_EXT3_TOPOEXT (1U << 22)
#define CPUID_EXT3_PERFCORE (1U << 23)
#define CPUID_EXT3_PERFNB (1U << 24)
#define CPUID_SVM_NPT (1U << 0)
#define CPUID_SVM_LBRV (1U << 1)
#define CPUID_SVM_SVMLOCK (1U << 2)
#define CPUID_SVM_NRIPSAVE (1U << 3)
#define CPUID_SVM_TSCSCALE (1U << 4)
#define CPUID_SVM_VMCBCLEAN (1U << 5)
#define CPUID_SVM_FLUSHASID (1U << 6)
#define CPUID_SVM_DECODEASSIST (1U << 7)
#define CPUID_SVM_PAUSEFILTER (1U << 10)
#define CPUID_SVM_PFTHRESHOLD (1U << 12)
#define CPUID_7_0_EBX_FSGSBASE (1U << 0)
#define CPUID_7_0_EBX_BMI1 (1U << 3)
#define CPUID_7_0_EBX_HLE (1U << 4)
#define CPUID_7_0_EBX_AVX2 (1U << 5)
#define CPUID_7_0_EBX_SMEP (1U << 7)
#define CPUID_7_0_EBX_BMI2 (1U << 8)
#define CPUID_7_0_EBX_ERMS (1U << 9)
#define CPUID_7_0_EBX_INVPCID (1U << 10)
#define CPUID_7_0_EBX_RTM (1U << 11)
#define CPUID_7_0_EBX_MPX (1U << 14)
#define CPUID_7_0_EBX_AVX512F (1U << 16) /* AVX-512 Foundation */
#define CPUID_7_0_EBX_AVX512DQ (1U << 17) /* AVX-512 Doubleword & Quadword Instrs */
#define CPUID_7_0_EBX_RDSEED (1U << 18)
#define CPUID_7_0_EBX_ADX (1U << 19)
#define CPUID_7_0_EBX_SMAP (1U << 20)
#define CPUID_7_0_EBX_AVX512IFMA (1U << 21) /* AVX-512 Integer Fused Multiply Add */
#define CPUID_7_0_EBX_PCOMMIT (1U << 22) /* Persistent Commit */
#define CPUID_7_0_EBX_CLFLUSHOPT (1U << 23) /* Flush a Cache Line Optimized */
#define CPUID_7_0_EBX_CLWB (1U << 24) /* Cache Line Write Back */
#define CPUID_7_0_EBX_INTEL_PT (1U << 25) /* Intel Processor Trace */
#define CPUID_7_0_EBX_AVX512PF (1U << 26) /* AVX-512 Prefetch */
#define CPUID_7_0_EBX_AVX512ER (1U << 27) /* AVX-512 Exponential and Reciprocal */
#define CPUID_7_0_EBX_AVX512CD (1U << 28) /* AVX-512 Conflict Detection */
#define CPUID_7_0_EBX_SHA_NI (1U << 29) /* SHA1/SHA256 Instruction Extensions */
#define CPUID_7_0_EBX_AVX512BW (1U << 30) /* AVX-512 Byte and Word Instructions */
#define CPUID_7_0_EBX_AVX512VL (1U << 31) /* AVX-512 Vector Length Extensions */
#define CPUID_7_0_ECX_AVX512BMI (1U << 1)
#define CPUID_7_0_ECX_VBMI (1U << 1) /* AVX-512 Vector Byte Manipulation Instrs */
#define CPUID_7_0_ECX_UMIP (1U << 2)
#define CPUID_7_0_ECX_PKU (1U << 3)
#define CPUID_7_0_ECX_OSPKE (1U << 4)
#define CPUID_7_0_ECX_VBMI2 (1U << 6) /* Additional VBMI Instrs */
#define CPUID_7_0_ECX_GFNI (1U << 8)
#define CPUID_7_0_ECX_VAES (1U << 9)
#define CPUID_7_0_ECX_VPCLMULQDQ (1U << 10)
#define CPUID_7_0_ECX_AVX512VNNI (1U << 11)
#define CPUID_7_0_ECX_AVX512BITALG (1U << 12)
#define CPUID_7_0_ECX_AVX512_VPOPCNTDQ (1U << 14) /* POPCNT for vectors of DW/QW */
#define CPUID_7_0_ECX_LA57 (1U << 16)
#define CPUID_7_0_ECX_RDPID (1U << 22)
#define CPUID_7_0_ECX_CLDEMOTE (1U << 25) /* CLDEMOTE Instruction */
#define CPUID_7_0_ECX_MOVDIRI (1U << 27) /* MOVDIRI Instruction */
#define CPUID_7_0_ECX_MOVDIR64B (1U << 28) /* MOVDIR64B Instruction */
#define CPUID_7_0_EDX_AVX512_4VNNIW (1U << 2) /* AVX512 Neural Network Instructions */
#define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3) /* AVX512 Multiply Accumulation Single Precision */
#define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Speculation Control */
#define CPUID_7_0_EDX_ARCH_CAPABILITIES (1U << 29) /*Arch Capabilities*/
#define CPUID_7_0_EDX_CORE_CAPABILITY (1U << 30) /*Core Capability*/
#define CPUID_7_0_EDX_SPEC_CTRL_SSBD (1U << 31) /* Speculative Store Bypass Disable */
#define CPUID_8000_0008_EBX_WBNOINVD (1U << 9) /* Write back and
do not invalidate cache */
#define CPUID_8000_0008_EBX_IBPB (1U << 12) /* Indirect Branch Prediction Barrier */
#define CPUID_XSAVE_XSAVEOPT (1U << 0)
#define CPUID_XSAVE_XSAVEC (1U << 1)
#define CPUID_XSAVE_XGETBV1 (1U << 2)
#define CPUID_XSAVE_XSAVES (1U << 3)
#define CPUID_6_EAX_ARAT (1U << 2)
/* CPUID[0x80000007].EDX flags: */
#define CPUID_APM_INVTSC (1U << 8)
#define CPUID_VENDOR_SZ 12
#define CPUID_VENDOR_INTEL_1 0x756e6547 /* "Genu" */
#define CPUID_VENDOR_INTEL_2 0x49656e69 /* "ineI" */
#define CPUID_VENDOR_INTEL_3 0x6c65746e /* "ntel" */
#define CPUID_VENDOR_INTEL "GenuineIntel"
#define CPUID_VENDOR_AMD_1 0x68747541 /* "Auth" */
#define CPUID_VENDOR_AMD_2 0x69746e65 /* "enti" */
#define CPUID_VENDOR_AMD_3 0x444d4163 /* "cAMD" */
#define CPUID_VENDOR_AMD "AuthenticAMD"
#define CPUID_VENDOR_VIA "CentaurHauls"
#define CPUID_VENDOR_HYGON "HygonGenuine"
#define IS_INTEL_CPU(env) ((env)->cpuid_vendor1 == CPUID_VENDOR_INTEL_1 && \
(env)->cpuid_vendor2 == CPUID_VENDOR_INTEL_2 && \
(env)->cpuid_vendor3 == CPUID_VENDOR_INTEL_3)
#define IS_AMD_CPU(env) ((env)->cpuid_vendor1 == CPUID_VENDOR_AMD_1 && \
(env)->cpuid_vendor2 == CPUID_VENDOR_AMD_2 && \
(env)->cpuid_vendor3 == CPUID_VENDOR_AMD_3)
#define CPUID_MWAIT_IBE (1U << 1) /* Interrupts can exit capability */
#define CPUID_MWAIT_EMX (1U << 0) /* enumeration supported */
/* CPUID[0xB].ECX level types */
#define CPUID_TOPOLOGY_LEVEL_INVALID (0U << 8)
#define CPUID_TOPOLOGY_LEVEL_SMT (1U << 8)
#define CPUID_TOPOLOGY_LEVEL_CORE (2U << 8)
#define CPUID_TOPOLOGY_LEVEL_DIE (5U << 8)
/* MSR Feature Bits */
#define MSR_ARCH_CAP_RDCL_NO (1U << 0)
#define MSR_ARCH_CAP_IBRS_ALL (1U << 1)
#define MSR_ARCH_CAP_RSBA (1U << 2)
#define MSR_ARCH_CAP_SKIP_L1DFL_VMENTRY (1U << 3)
#define MSR_ARCH_CAP_SSB_NO (1U << 4)
#define MSR_CORE_CAP_SPLIT_LOCK_DETECT (1U << 5)
/* Supported Hyper-V Enlightenments */
#define HYPERV_FEAT_RELAXED 0
#define HYPERV_FEAT_VAPIC 1
#define HYPERV_FEAT_TIME 2
#define HYPERV_FEAT_CRASH 3
#define HYPERV_FEAT_RESET 4
#define HYPERV_FEAT_VPINDEX 5
#define HYPERV_FEAT_RUNTIME 6
#define HYPERV_FEAT_SYNIC 7
#define HYPERV_FEAT_STIMER 8
#define HYPERV_FEAT_FREQUENCIES 9
#define HYPERV_FEAT_REENLIGHTENMENT 10
#define HYPERV_FEAT_TLBFLUSH 11
#define HYPERV_FEAT_EVMCS 12
#define HYPERV_FEAT_IPI 13
#define HYPERV_FEAT_STIMER_DIRECT 14
#ifndef HYPERV_SPINLOCK_NEVER_RETRY
#define HYPERV_SPINLOCK_NEVER_RETRY 0xFFFFFFFF
#endif
#define EXCP00_DIVZ 0
#define EXCP01_DB 1
#define EXCP02_NMI 2
#define EXCP03_INT3 3
#define EXCP04_INTO 4
#define EXCP05_BOUND 5
#define EXCP06_ILLOP 6
#define EXCP07_PREX 7
#define EXCP08_DBLE 8
#define EXCP09_XERR 9
#define EXCP0A_TSS 10
#define EXCP0B_NOSEG 11
#define EXCP0C_STACK 12
#define EXCP0D_GPF 13
#define EXCP0E_PAGE 14
#define EXCP10_COPR 16
#define EXCP11_ALGN 17
#define EXCP12_MCHK 18
#define EXCP_SYSCALL 0x100 /* only happens in user only emulation
for syscall instruction */
#define EXCP_VMEXIT 0x100
/* i386-specific interrupt pending bits. */
#define CPU_INTERRUPT_POLL CPU_INTERRUPT_TGT_EXT_1
#define CPU_INTERRUPT_SMI CPU_INTERRUPT_TGT_EXT_2
#define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_3
#define CPU_INTERRUPT_MCE CPU_INTERRUPT_TGT_EXT_4
#define CPU_INTERRUPT_VIRQ CPU_INTERRUPT_TGT_INT_0
#define CPU_INTERRUPT_SIPI CPU_INTERRUPT_TGT_INT_1
#define CPU_INTERRUPT_TPR CPU_INTERRUPT_TGT_INT_2
/* Use a clearer name for this. */
#define CPU_INTERRUPT_INIT CPU_INTERRUPT_RESET
/* Instead of computing the condition codes after each x86 instruction,
* QEMU just stores one operand (called CC_SRC), the result
* (called CC_DST) and the type of operation (called CC_OP). When the
* condition codes are needed, the condition codes can be calculated
* using this information. Condition codes are not generated if they
* are only needed for conditional branches.
*/
typedef enum {
CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
CC_OP_EFLAGS, /* all cc are explicitly computed, CC_SRC = flags */
CC_OP_MULB, /* modify all flags, C, O = (CC_SRC != 0) */
CC_OP_MULW,
CC_OP_MULL,
CC_OP_MULQ,
CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
CC_OP_ADDW,
CC_OP_ADDL,
CC_OP_ADDQ,
CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
CC_OP_ADCW,
CC_OP_ADCL,
CC_OP_ADCQ,
CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
CC_OP_SUBW,
CC_OP_SUBL,
CC_OP_SUBQ,
CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
CC_OP_SBBW,
CC_OP_SBBL,
CC_OP_SBBQ,
CC_OP_LOGICB, /* modify all flags, CC_DST = res */
CC_OP_LOGICW,
CC_OP_LOGICL,
CC_OP_LOGICQ,
CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
CC_OP_INCW,
CC_OP_INCL,
CC_OP_INCQ,
CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C */
CC_OP_DECW,
CC_OP_DECL,
CC_OP_DECQ,
CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.msb = C */
CC_OP_SHLW,
CC_OP_SHLL,
CC_OP_SHLQ,
CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
CC_OP_SARW,
CC_OP_SARL,
CC_OP_SARQ,
CC_OP_BMILGB, /* Z,S via CC_DST, C = SRC==0; O=0; P,A undefined */
CC_OP_BMILGW,
CC_OP_BMILGL,
CC_OP_BMILGQ,
CC_OP_ADCX, /* CC_DST = C, CC_SRC = rest. */
CC_OP_ADOX, /* CC_DST = O, CC_SRC = rest. */
CC_OP_ADCOX, /* CC_DST = C, CC_SRC2 = O, CC_SRC = rest. */
CC_OP_CLR, /* Z set, all other flags clear. */
CC_OP_POPCNT, /* Z via CC_SRC, all other flags clear. */
CC_OP_NB,
} CCOp;
typedef struct SegmentCache {
uint32_t selector;
target_ulong base;
uint32_t limit;
uint32_t flags;
} SegmentCache;
#define MMREG_UNION(n, bits) \
union n { \
uint8_t _b_##n[(bits)/8]; \
uint16_t _w_##n[(bits)/16]; \
uint32_t _l_##n[(bits)/32]; \
uint64_t _q_##n[(bits)/64]; \
float32 _s_##n[(bits)/32]; \
float64 _d_##n[(bits)/64]; \
}
typedef union {
uint8_t _b[16];
uint16_t _w[8];
uint32_t _l[4];
uint64_t _q[2];
} XMMReg;
typedef union {
uint8_t _b[32];
uint16_t _w[16];
uint32_t _l[8];
uint64_t _q[4];
} YMMReg;
typedef MMREG_UNION(ZMMReg, 512) ZMMReg;
typedef MMREG_UNION(MMXReg, 64) MMXReg;
typedef struct BNDReg {
uint64_t lb;
uint64_t ub;
} BNDReg;
typedef struct BNDCSReg {
uint64_t cfgu;
uint64_t sts;
} BNDCSReg;
#define BNDCFG_ENABLE 1ULL
#define BNDCFG_BNDPRESERVE 2ULL
#define BNDCFG_BDIR_MASK TARGET_PAGE_MASK
#ifdef HOST_WORDS_BIGENDIAN
#define ZMM_B(n) _b_ZMMReg[63 - (n)]
#define ZMM_W(n) _w_ZMMReg[31 - (n)]
#define ZMM_L(n) _l_ZMMReg[15 - (n)]
#define ZMM_S(n) _s_ZMMReg[15 - (n)]
#define ZMM_Q(n) _q_ZMMReg[7 - (n)]
#define ZMM_D(n) _d_ZMMReg[7 - (n)]
#define MMX_B(n) _b_MMXReg[7 - (n)]
#define MMX_W(n) _w_MMXReg[3 - (n)]
#define MMX_L(n) _l_MMXReg[1 - (n)]
#define MMX_S(n) _s_MMXReg[1 - (n)]
#else
#define ZMM_B(n) _b_ZMMReg[n]
#define ZMM_W(n) _w_ZMMReg[n]
#define ZMM_L(n) _l_ZMMReg[n]
#define ZMM_S(n) _s_ZMMReg[n]
#define ZMM_Q(n) _q_ZMMReg[n]
#define ZMM_D(n) _d_ZMMReg[n]
#define MMX_B(n) _b_MMXReg[n]
#define MMX_W(n) _w_MMXReg[n]
#define MMX_L(n) _l_MMXReg[n]
#define MMX_S(n) _s_MMXReg[n]
#endif
#define MMX_Q(n) _q_MMXReg[n]
typedef union {
floatx80 d __attribute__((aligned(16)));
MMXReg mmx;
} FPReg;
typedef struct {
uint64_t base;
uint64_t mask;
} MTRRVar;
#define CPU_NB_REGS64 16
#define CPU_NB_REGS32 8
#ifdef TARGET_X86_64
#define CPU_NB_REGS CPU_NB_REGS64
#else
#define CPU_NB_REGS CPU_NB_REGS32
#endif
#define MAX_FIXED_COUNTERS 3
#define MAX_GP_COUNTERS (MSR_IA32_PERF_STATUS - MSR_P6_EVNTSEL0)
#define TARGET_INSN_START_EXTRA_WORDS 1
#define NB_OPMASK_REGS 8
/* CPU can't have 0xFFFFFFFF APIC ID, use that value to distinguish
* that APIC ID hasn't been set yet
*/
#define UNASSIGNED_APIC_ID 0xFFFFFFFF
typedef union X86LegacyXSaveArea {
struct {
uint16_t fcw;
uint16_t fsw;
uint8_t ftw;
uint8_t reserved;
uint16_t fpop;
uint64_t fpip;
uint64_t fpdp;
uint32_t mxcsr;
uint32_t mxcsr_mask;
FPReg fpregs[8];
uint8_t xmm_regs[16][16];