diff options
Diffstat (limited to 'target/i386/hvf-utils/x86_flags.h')
| -rw-r--r-- | target/i386/hvf-utils/x86_flags.h | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/target/i386/hvf-utils/x86_flags.h b/target/i386/hvf-utils/x86_flags.h new file mode 100644 index 0000000000..57a524240c --- /dev/null +++ b/target/i386/hvf-utils/x86_flags.h @@ -0,0 +1,243 @@ +///////////////////////////////////////////////////////////////////////// +// +// Copyright (C) 2001-2012 The Bochs Project +// Copyright (C) 2017 Google Inc. +// +// 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 +///////////////////////////////////////////////////////////////////////// +/* + * x86 eflags functions + */ +#ifndef __X86_FLAGS_H__ +#define __X86_FLAGS_H__ + +#include "x86_gen.h" +#include "cpu.h" + +/* this is basically bocsh code */ + +#define LF_SIGN_BIT 31 + +#define LF_BIT_SD (0) /* lazy Sign Flag Delta */ +#define LF_BIT_AF (3) /* lazy Adjust flag */ +#define LF_BIT_PDB (8) /* lazy Parity Delta Byte (8 bits) */ +#define LF_BIT_CF (31) /* lazy Carry Flag */ +#define LF_BIT_PO (30) /* lazy Partial Overflow = CF ^ OF */ + +#define LF_MASK_SD (0x01 << LF_BIT_SD) +#define LF_MASK_AF (0x01 << LF_BIT_AF) +#define LF_MASK_PDB (0xFF << LF_BIT_PDB) +#define LF_MASK_CF (0x01 << LF_BIT_CF) +#define LF_MASK_PO (0x01 << LF_BIT_PO) + +#define ADD_COUT_VEC(op1, op2, result) \ + (((op1) & (op2)) | (((op1) | (op2)) & (~(result)))) + +#define SUB_COUT_VEC(op1, op2, result) \ + (((~(op1)) & (op2)) | (((~(op1)) ^ (op2)) & (result))) + +#define GET_ADD_OVERFLOW(op1, op2, result, mask) \ + ((((op1) ^ (result)) & ((op2) ^ (result))) & (mask)) + +/* ******************* */ +/* OSZAPC */ +/* ******************* */ + +/* size, carries, result */ +#define SET_FLAGS_OSZAPC_SIZE(size, lf_carries, lf_result) { \ + addr_t temp = ((lf_carries) & (LF_MASK_AF)) | \ + (((lf_carries) >> (size - 2)) << LF_BIT_PO); \ + env->hvf_emul->lflags.result = (addr_t)(int##size##_t)(lf_result); \ + if ((size) == 32) { \ + temp = ((lf_carries) & ~(LF_MASK_PDB | LF_MASK_SD)); \ + } else if ((size) == 16) { \ + temp = ((lf_carries) & (LF_MASK_AF)) | ((lf_carries) << 16); \ + } else if ((size) == 8) { \ + temp = ((lf_carries) & (LF_MASK_AF)) | ((lf_carries) << 24); \ + } else { \ + VM_PANIC("unimplemented"); \ + } \ + env->hvf_emul->lflags.auxbits = (addr_t)(uint32_t)temp; \ +} + +/* carries, result */ +#define SET_FLAGS_OSZAPC_8(carries, result) \ + SET_FLAGS_OSZAPC_SIZE(8, carries, result) +#define SET_FLAGS_OSZAPC_16(carries, result) \ + SET_FLAGS_OSZAPC_SIZE(16, carries, result) +#define SET_FLAGS_OSZAPC_32(carries, result) \ + SET_FLAGS_OSZAPC_SIZE(32, carries, result) + +/* result */ +#define SET_FLAGS_OSZAPC_LOGIC_8(result_8) \ + SET_FLAGS_OSZAPC_8(0, (result_8)) +#define SET_FLAGS_OSZAPC_LOGIC_16(result_16) \ + SET_FLAGS_OSZAPC_16(0, (result_16)) +#define SET_FLAGS_OSZAPC_LOGIC_32(result_32) \ + SET_FLAGS_OSZAPC_32(0, (result_32)) +#define SET_FLAGS_OSZAPC_LOGIC_SIZE(size, result) { \ + if (32 == size) { \ + SET_FLAGS_OSZAPC_LOGIC_32(result); \ + } else if (16 == size) { \ + SET_FLAGS_OSZAPC_LOGIC_16(result); \ + } else if (8 == size) { \ + SET_FLAGS_OSZAPC_LOGIC_8(result); \ + } else { \ + VM_PANIC("unimplemented"); \ + } \ +} + +/* op1, op2, result */ +#define SET_FLAGS_OSZAPC_ADD_8(op1_8, op2_8, sum_8) \ + SET_FLAGS_OSZAPC_8(ADD_COUT_VEC((op1_8), (op2_8), (sum_8)), (sum_8)) +#define SET_FLAGS_OSZAPC_ADD_16(op1_16, op2_16, sum_16) \ + SET_FLAGS_OSZAPC_16(ADD_COUT_VEC((op1_16), (op2_16), (sum_16)), (sum_16)) +#define SET_FLAGS_OSZAPC_ADD_32(op1_32, op2_32, sum_32) \ + SET_FLAGS_OSZAPC_32(ADD_COUT_VEC((op1_32), (op2_32), (sum_32)), (sum_32)) + +/* op1, op2, result */ +#define SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8) \ + SET_FLAGS_OSZAPC_8(SUB_COUT_VEC((op1_8), (op2_8), (diff_8)), (diff_8)) +#define SET_FLAGS_OSZAPC_SUB_16(op1_16, op2_16, diff_16) \ + SET_FLAGS_OSZAPC_16(SUB_COUT_VEC((op1_16), (op2_16), (diff_16)), (diff_16)) +#define SET_FLAGS_OSZAPC_SUB_32(op1_32, op2_32, diff_32) \ + SET_FLAGS_OSZAPC_32(SUB_COUT_VEC((op1_32), (op2_32), (diff_32)), (diff_32)) + +/* ******************* */ +/* OSZAP */ +/* ******************* */ +/* size, carries, result */ +#define SET_FLAGS_OSZAP_SIZE(size, lf_carries, lf_result) { \ + addr_t temp = ((lf_carries) & (LF_MASK_AF)) | \ + (((lf_carries) >> (size - 2)) << LF_BIT_PO); \ + if ((size) == 32) { \ + temp = ((lf_carries) & ~(LF_MASK_PDB | LF_MASK_SD)); \ + } else if ((size) == 16) { \ + temp = ((lf_carries) & (LF_MASK_AF)) | ((lf_carries) << 16); \ + } else if ((size) == 8) { \ + temp = ((lf_carries) & (LF_MASK_AF)) | ((lf_carries) << 24); \ + } else { \ + VM_PANIC("unimplemented"); \ + } \ + env->hvf_emul->lflags.result = (addr_t)(int##size##_t)(lf_result); \ + addr_t delta_c = (env->hvf_emul->lflags.auxbits ^ temp) & LF_MASK_CF; \ + delta_c ^= (delta_c >> 1); \ + env->hvf_emul->lflags.auxbits = (addr_t)(uint32_t)(temp ^ delta_c); \ +} + +/* carries, result */ +#define SET_FLAGS_OSZAP_8(carries, result) \ + SET_FLAGS_OSZAP_SIZE(8, carries, result) +#define SET_FLAGS_OSZAP_16(carries, result) \ + SET_FLAGS_OSZAP_SIZE(16, carries, result) +#define SET_FLAGS_OSZAP_32(carries, result) \ + SET_FLAGS_OSZAP_SIZE(32, carries, result) + +/* op1, op2, result */ +#define SET_FLAGS_OSZAP_ADD_8(op1_8, op2_8, sum_8) \ + SET_FLAGS_OSZAP_8(ADD_COUT_VEC((op1_8), (op2_8), (sum_8)), (sum_8)) +#define SET_FLAGS_OSZAP_ADD_16(op1_16, op2_16, sum_16) \ + SET_FLAGS_OSZAP_16(ADD_COUT_VEC((op1_16), (op2_16), (sum_16)), (sum_16)) +#define SET_FLAGS_OSZAP_ADD_32(op1_32, op2_32, sum_32) \ + SET_FLAGS_OSZAP_32(ADD_COUT_VEC((op1_32), (op2_32), (sum_32)), (sum_32)) + +/* op1, op2, result */ +#define SET_FLAGS_OSZAP_SUB_8(op1_8, op2_8, diff_8) \ + SET_FLAGS_OSZAP_8(SUB_COUT_VEC((op1_8), (op2_8), (diff_8)), (diff_8)) +#define SET_FLAGS_OSZAP_SUB_16(op1_16, op2_16, diff_16) \ + SET_FLAGS_OSZAP_16(SUB_COUT_VEC((op1_16), (op2_16), (diff_16)), (diff_16)) +#define SET_FLAGS_OSZAP_SUB_32(op1_32, op2_32, diff_32) \ + SET_FLAGS_OSZAP_32(SUB_COUT_VEC((op1_32), (op2_32), (diff_32)), (diff_32)) + +/* ******************* */ +/* OSZAxC */ +/* ******************* */ +/* size, carries, result */ +#define SET_FLAGS_OSZAxC_LOGIC_SIZE(size, lf_result) { \ + bool saved_PF = getB_PF(); \ + SET_FLAGS_OSZAPC_SIZE(size, (int##size##_t)(0), lf_result); \ + set_PF(saved_PF); \ +} + +/* result */ +#define SET_FLAGS_OSZAxC_LOGIC_32(result_32) \ + SET_FLAGS_OSZAxC_LOGIC_SIZE(32, (result_32)) + +void lflags_to_rflags(CPUX86State *env); +void rflags_to_lflags(CPUX86State *env); + +bool get_PF(CPUX86State *env); +void set_PF(CPUX86State *env, bool val); +bool get_CF(CPUX86State *env); +void set_CF(CPUX86State *env, bool val); +bool get_AF(CPUX86State *env); +void set_AF(CPUX86State *env, bool val); +bool get_ZF(CPUX86State *env); +void set_ZF(CPUX86State *env, bool val); +bool get_SF(CPUX86State *env); +void set_SF(CPUX86State *env, bool val); +bool get_OF(CPUX86State *env); +void set_OF(CPUX86State *env, bool val); +void set_OSZAPC(CPUX86State *env, uint32_t flags32); + +void SET_FLAGS_OxxxxC(CPUX86State *env, uint32_t new_of, uint32_t new_cf); + +void SET_FLAGS_OSZAPC_SUB32(CPUX86State *env, uint32_t v1, uint32_t v2, + uint32_t diff); +void SET_FLAGS_OSZAPC_SUB16(CPUX86State *env, uint16_t v1, uint16_t v2, + uint16_t diff); +void SET_FLAGS_OSZAPC_SUB8(CPUX86State *env, uint8_t v1, uint8_t v2, + uint8_t diff); + +void SET_FLAGS_OSZAPC_ADD32(CPUX86State *env, uint32_t v1, uint32_t v2, + uint32_t diff); +void SET_FLAGS_OSZAPC_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2, + uint16_t diff); +void SET_FLAGS_OSZAPC_ADD8(CPUX86State *env, uint8_t v1, uint8_t v2, + uint8_t diff); + +void SET_FLAGS_OSZAP_SUB32(CPUX86State *env, uint32_t v1, uint32_t v2, + uint32_t diff); +void SET_FLAGS_OSZAP_SUB16(CPUX86State *env, uint16_t v1, uint16_t v2, + uint16_t diff); +void SET_FLAGS_OSZAP_SUB8(CPUX86State *env, uint8_t v1, uint8_t v2, + uint8_t diff); + +void SET_FLAGS_OSZAP_ADD32(CPUX86State *env, uint32_t v1, uint32_t v2, + uint32_t diff); +void SET_FLAGS_OSZAP_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2, + uint16_t diff); +void SET_FLAGS_OSZAP_ADD8(CPUX86State *env, uint8_t v1, uint8_t v2, + uint8_t diff); + +void SET_FLAGS_OSZAPC_LOGIC32(CPUX86State *env, uint32_t diff); +void SET_FLAGS_OSZAPC_LOGIC16(CPUX86State *env, uint16_t diff); +void SET_FLAGS_OSZAPC_LOGIC8(CPUX86State *env, uint8_t diff); + +void SET_FLAGS_SHR32(CPUX86State *env, uint32_t v, int count, uint32_t res); +void SET_FLAGS_SHR16(CPUX86State *env, uint16_t v, int count, uint16_t res); +void SET_FLAGS_SHR8(CPUX86State *env, uint8_t v, int count, uint8_t res); + +void SET_FLAGS_SAR32(CPUX86State *env, int32_t v, int count, uint32_t res); +void SET_FLAGS_SAR16(CPUX86State *env, int16_t v, int count, uint16_t res); +void SET_FLAGS_SAR8(CPUX86State *env, int8_t v, int count, uint8_t res); + +void SET_FLAGS_SHL32(CPUX86State *env, uint32_t v, int count, uint32_t res); +void SET_FLAGS_SHL16(CPUX86State *env, uint16_t v, int count, uint16_t res); +void SET_FLAGS_SHL8(CPUX86State *env, uint8_t v, int count, uint8_t res); + +bool _get_OF(CPUX86State *env); +bool _get_CF(CPUX86State *env); +#endif /* __X86_FLAGS_H__ */ |