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i386: hvf: simplify flag handling 

Remove much indirection and duplicate code, and provide a cleaner interface
out of x86_flags.c.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-10-03 14:41:27 +02:00
parent e62963bf48
commit e8a632579d
3 changed files with 144 additions and 357 deletions
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93
target/i386/hvf/x86_emu.c
View File

@ -49,7 +49,7 @@
void hvf_handle_io(struct CPUState *cpu, uint16_t port, void *data,
int direction, int size, uint32_t count);
#define EXEC_2OP_LOGIC_CMD(env, decode, cmd, FLAGS_FUNC, save_res) \
#define EXEC_2OP_FLAGS_CMD(env, decode, cmd, FLAGS_FUNC, save_res) \
{ \
fetch_operands(env, decode, 2, true, true, false); \
switch (decode->operand_size) { \
@ -61,7 +61,7 @@ void hvf_handle_io(struct CPUState *cpu, uint16_t port, void *data,
if (save_res) { \
write_val_ext(env, decode->op[0].ptr, diff, 1); \
} \
FLAGS_FUNC##_8(diff); \
FLAGS_FUNC##8(env, v1, v2, diff); \
break; \
} \
case 2: \
@ -72,7 +72,7 @@ void hvf_handle_io(struct CPUState *cpu, uint16_t port, void *data,
if (save_res) { \
write_val_ext(env, decode->op[0].ptr, diff, 2); \
} \
FLAGS_FUNC##_16(diff); \
FLAGS_FUNC##16(env, v1, v2, diff); \
break; \
} \
case 4: \
@ -83,7 +83,7 @@ void hvf_handle_io(struct CPUState *cpu, uint16_t port, void *data,
if (save_res) { \
write_val_ext(env, decode->op[0].ptr, diff, 4); \
} \
FLAGS_FUNC##_32(diff); \
FLAGS_FUNC##32(env, v1, v2, diff); \
break; \
} \
default: \
@ -91,49 +91,6 @@ void hvf_handle_io(struct CPUState *cpu, uint16_t port, void *data,
} \
} \
#define EXEC_2OP_ARITH_CMD(env, decode, cmd, FLAGS_FUNC, save_res) \
{ \
fetch_operands(env, decode, 2, true, true, false); \
switch (decode->operand_size) { \
case 1: \
{ \
uint8_t v1 = (uint8_t)decode->op[0].val; \
uint8_t v2 = (uint8_t)decode->op[1].val; \
uint8_t diff = v1 cmd v2; \
if (save_res) { \
write_val_ext(env, decode->op[0].ptr, diff, 1); \
} \
FLAGS_FUNC##_8(v1, v2, diff); \
break; \
} \
case 2: \
{ \
uint16_t v1 = (uint16_t)decode->op[0].val; \
uint16_t v2 = (uint16_t)decode->op[1].val; \
uint16_t diff = v1 cmd v2; \
if (save_res) { \
write_val_ext(env, decode->op[0].ptr, diff, 2); \
} \
FLAGS_FUNC##_16(v1, v2, diff); \
break; \
} \
case 4: \
{ \
uint32_t v1 = (uint32_t)decode->op[0].val; \
uint32_t v2 = (uint32_t)decode->op[1].val; \
uint32_t diff = v1 cmd v2; \
if (save_res) { \
write_val_ext(env, decode->op[0].ptr, diff, 4); \
} \
FLAGS_FUNC##_32(v1, v2, diff); \
break; \
} \
default: \
VM_PANIC("bad size\n"); \
} \
}
addr_t read_reg(CPUX86State *env, int reg, int size)
{
switch (size) {
@ -315,49 +272,49 @@ static void exec_mov(struct CPUX86State *env, struct x86_decode *decode)
static void exec_add(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_ARITH_CMD(env, decode, +, SET_FLAGS_OSZAPC_ADD, true);
EXEC_2OP_FLAGS_CMD(env, decode, +, SET_FLAGS_OSZAPC_ADD, true);
RIP(env) += decode->len;
}
static void exec_or(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_LOGIC_CMD(env, decode, |, SET_FLAGS_OSZAPC_LOGIC, true);
EXEC_2OP_FLAGS_CMD(env, decode, |, SET_FLAGS_OSZAPC_LOGIC, true);
RIP(env) += decode->len;
}
static void exec_adc(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_ARITH_CMD(env, decode, +get_CF(env)+, SET_FLAGS_OSZAPC_ADD, true);
EXEC_2OP_FLAGS_CMD(env, decode, +get_CF(env)+, SET_FLAGS_OSZAPC_ADD, true);
RIP(env) += decode->len;
}
static void exec_sbb(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_ARITH_CMD(env, decode, -get_CF(env)-, SET_FLAGS_OSZAPC_SUB, true);
EXEC_2OP_FLAGS_CMD(env, decode, -get_CF(env)-, SET_FLAGS_OSZAPC_SUB, true);
RIP(env) += decode->len;
}
static void exec_and(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_LOGIC_CMD(env, decode, &, SET_FLAGS_OSZAPC_LOGIC, true);
EXEC_2OP_FLAGS_CMD(env, decode, &, SET_FLAGS_OSZAPC_LOGIC, true);
RIP(env) += decode->len;
}
static void exec_sub(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_ARITH_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, true);
EXEC_2OP_FLAGS_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, true);
RIP(env) += decode->len;
}
static void exec_xor(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_LOGIC_CMD(env, decode, ^, SET_FLAGS_OSZAPC_LOGIC, true);
EXEC_2OP_FLAGS_CMD(env, decode, ^, SET_FLAGS_OSZAPC_LOGIC, true);
RIP(env) += decode->len;
}
static void exec_neg(struct CPUX86State *env, struct x86_decode *decode)
{
/*EXEC_2OP_ARITH_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);*/
/*EXEC_2OP_FLAGS_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);*/
int32_t val;
fetch_operands(env, decode, 2, true, true, false);
@ -365,11 +322,11 @@ static void exec_neg(struct CPUX86State *env, struct x86_decode *decode)
write_val_ext(env, decode->op[1].ptr, val, decode->operand_size);
if (4 == decode->operand_size) {
SET_FLAGS_OSZAPC_SUB_32(0, 0 - val, val);
SET_FLAGS_OSZAPC_SUB32(env, 0, 0 - val, val);
} else if (2 == decode->operand_size) {
SET_FLAGS_OSZAPC_SUB_16(0, 0 - val, val);
SET_FLAGS_OSZAPC_SUB16(env, 0, 0 - val, val);
} else if (1 == decode->operand_size) {
SET_FLAGS_OSZAPC_SUB_8(0, 0 - val, val);
SET_FLAGS_OSZAPC_SUB8(env, 0, 0 - val, val);
} else {
VM_PANIC("bad op size\n");
}
@ -380,7 +337,7 @@ static void exec_neg(struct CPUX86State *env, struct x86_decode *decode)
static void exec_cmp(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_ARITH_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);
EXEC_2OP_FLAGS_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);
RIP(env) += decode->len;
}
@ -389,7 +346,7 @@ static void exec_inc(struct CPUX86State *env, struct x86_decode *decode)
decode->op[1].type = X86_VAR_IMMEDIATE;
decode->op[1].val = 0;
EXEC_2OP_ARITH_CMD(env, decode, +1+, SET_FLAGS_OSZAP_ADD, true);
EXEC_2OP_FLAGS_CMD(env, decode, +1+, SET_FLAGS_OSZAP_ADD, true);
RIP(env) += decode->len;
}
@ -399,13 +356,13 @@ static void exec_dec(struct CPUX86State *env, struct x86_decode *decode)
decode->op[1].type = X86_VAR_IMMEDIATE;
decode->op[1].val = 0;
EXEC_2OP_ARITH_CMD(env, decode, -1-, SET_FLAGS_OSZAP_SUB, true);
EXEC_2OP_FLAGS_CMD(env, decode, -1-, SET_FLAGS_OSZAP_SUB, true);
RIP(env) += decode->len;
}
static void exec_tst(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_LOGIC_CMD(env, decode, &, SET_FLAGS_OSZAPC_LOGIC, false);
EXEC_2OP_FLAGS_CMD(env, decode, &, SET_FLAGS_OSZAPC_LOGIC, false);
RIP(env) += decode->len;
}
@ -612,7 +569,7 @@ static void exec_cmps_single(struct CPUX86State *env, struct x86_decode *decode)
decode->op[1].type = X86_VAR_IMMEDIATE;
decode->op[1].val = read_val_ext(env, dst_addr, decode->operand_size);
EXEC_2OP_ARITH_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);
EXEC_2OP_FLAGS_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);
string_increment_reg(env, R_ESI, decode);
string_increment_reg(env, R_EDI, decode);
@ -661,7 +618,7 @@ static void exec_scas_single(struct CPUX86State *env, struct x86_decode *decode)
decode->op[1].type = X86_VAR_IMMEDIATE;
vmx_read_mem(ENV_GET_CPU(env), &decode->op[1].val, addr, decode->operand_size);
EXEC_2OP_ARITH_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);
EXEC_2OP_FLAGS_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);
string_increment_reg(env, R_EDI, decode);
}
@ -996,7 +953,7 @@ void exec_shl(struct CPUX86State *env, struct x86_decode *decode)
}
write_val_ext(env, decode->op[0].ptr, res, 1);
SET_FLAGS_OSZAPC_LOGIC_8(res);
SET_FLAGS_OSZAPC_LOGIC8(env, 0, 0, res);
SET_FLAGS_OxxxxC(env, of, cf);
break;
}
@ -1012,7 +969,7 @@ void exec_shl(struct CPUX86State *env, struct x86_decode *decode)
}
write_val_ext(env, decode->op[0].ptr, res, 2);
SET_FLAGS_OSZAPC_LOGIC_16(res);
SET_FLAGS_OSZAPC_LOGIC16(env, 0, 0, res);
SET_FLAGS_OxxxxC(env, of, cf);
break;
}
@ -1021,7 +978,7 @@ void exec_shl(struct CPUX86State *env, struct x86_decode *decode)
uint32_t res = decode->op[0].val << count;
write_val_ext(env, decode->op[0].ptr, res, 4);
SET_FLAGS_OSZAPC_LOGIC_32(res);
SET_FLAGS_OSZAPC_LOGIC32(env, 0, 0, res);
cf = (decode->op[0].val >> (32 - count)) & 0x1;
of = cf ^ (res >> 31); /* of = cf ^ result31 */
SET_FLAGS_OxxxxC(env, of, cf);
@ -1393,7 +1350,7 @@ static void exec_xchg(struct CPUX86State *env, struct x86_decode *decode)
static void exec_xadd(struct CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_ARITH_CMD(env, decode, +, SET_FLAGS_OSZAPC_ADD, true);
EXEC_2OP_FLAGS_CMD(env, decode, +, SET_FLAGS_OSZAPC_ADD, true);
write_val_ext(env, decode->op[1].ptr, decode->op[0].val,
decode->operand_size);

235
target/i386/hvf/x86_flags.c
View File

@ -28,6 +28,91 @@
#include "x86_flags.h"
#include "x86.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)
/* ******************* */
/* 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)
void SET_FLAGS_OxxxxC(CPUX86State *env, uint32_t new_of, uint32_t new_cf)
{
uint32_t temp_po = new_of ^ new_cf;
@ -39,178 +124,92 @@ 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)
{
SET_FLAGS_OSZAPC_SUB_32(v1, v2, diff);
SET_FLAGS_OSZAPC_32(SUB_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAPC_SUB16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAPC_SUB_16(v1, v2, diff);
SET_FLAGS_OSZAPC_16(SUB_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAPC_SUB8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAPC_SUB_8(v1, v2, diff);
SET_FLAGS_OSZAPC_8(SUB_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAPC_ADD32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff)
{
SET_FLAGS_OSZAPC_ADD_32(v1, v2, diff);
SET_FLAGS_OSZAPC_32(ADD_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAPC_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAPC_ADD_16(v1, v2, diff);
SET_FLAGS_OSZAPC_16(ADD_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAPC_ADD8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAPC_ADD_8(v1, v2, diff);
SET_FLAGS_OSZAPC_8(ADD_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAP_SUB32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff)
{
SET_FLAGS_OSZAP_SUB_32(v1, v2, diff);
SET_FLAGS_OSZAP_32(SUB_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAP_SUB16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAP_SUB_16(v1, v2, diff);
SET_FLAGS_OSZAP_16(SUB_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAP_SUB8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAP_SUB_8(v1, v2, diff);
SET_FLAGS_OSZAP_8(SUB_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAP_ADD32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff)
{
SET_FLAGS_OSZAP_ADD_32(v1, v2, diff);
SET_FLAGS_OSZAP_32(ADD_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAP_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAP_ADD_16(v1, v2, diff);
SET_FLAGS_OSZAP_16(ADD_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAP_ADD8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAP_ADD_8(v1, v2, diff);
SET_FLAGS_OSZAP_8(ADD_COUT_VEC(v1, v2, diff), diff);
}
void SET_FLAGS_OSZAPC_LOGIC32(CPUX86State *env, uint32_t diff)
void SET_FLAGS_OSZAPC_LOGIC32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff)
{
SET_FLAGS_OSZAPC_LOGIC_32(diff);
SET_FLAGS_OSZAPC_32(0, diff);
}
void SET_FLAGS_OSZAPC_LOGIC16(CPUX86State *env, uint16_t diff)
void SET_FLAGS_OSZAPC_LOGIC16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAPC_LOGIC_16(diff);
SET_FLAGS_OSZAPC_16(0, diff);
}
void SET_FLAGS_OSZAPC_LOGIC8(CPUX86State *env, uint8_t diff)
void SET_FLAGS_OSZAPC_LOGIC8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAPC_LOGIC_8(diff);
}
void SET_FLAGS_SHR32(CPUX86State *env, uint32_t v, int count, uint32_t res)
{
int cf = (v >> (count - 1)) & 0x1;
int of = (((res << 1) ^ res) >> 31);
SET_FLAGS_OSZAPC_LOGIC_32(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SHR16(CPUX86State *env, uint16_t v, int count, uint16_t res)
{
int cf = (v >> (count - 1)) & 0x1;
int of = (((res << 1) ^ res) >> 15);
SET_FLAGS_OSZAPC_LOGIC_16(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SHR8(CPUX86State *env, uint8_t v, int count, uint8_t res)
{
int cf = (v >> (count - 1)) & 0x1;
int of = (((res << 1) ^ res) >> 7);
SET_FLAGS_OSZAPC_LOGIC_8(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SAR32(CPUX86State *env, int32_t v, int count, uint32_t res)
{
int cf = (v >> (count - 1)) & 0x1;
SET_FLAGS_OSZAPC_LOGIC_32(res);
SET_FLAGS_OxxxxC(env, 0, cf);
}
void SET_FLAGS_SAR16(CPUX86State *env, int16_t v, int count, uint16_t res)
{
int cf = (v >> (count - 1)) & 0x1;
SET_FLAGS_OSZAPC_LOGIC_16(res);
SET_FLAGS_OxxxxC(env, 0, cf);
}
void SET_FLAGS_SAR8(CPUX86State *env, int8_t v, int count, uint8_t res)
{
int cf = (v >> (count - 1)) & 0x1;
SET_FLAGS_OSZAPC_LOGIC_8(res);
SET_FLAGS_OxxxxC(env, 0, cf);
}
void SET_FLAGS_SHL32(CPUX86State *env, uint32_t v, int count, uint32_t res)
{
int of, cf;
cf = (v >> (32 - count)) & 0x1;
of = cf ^ (res >> 31);
SET_FLAGS_OSZAPC_LOGIC_32(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SHL16(CPUX86State *env, uint16_t v, int count, uint16_t res)
{
int of = 0, cf = 0;
if (count <= 16) {
cf = (v >> (16 - count)) & 0x1;
of = cf ^ (res >> 15);
}
SET_FLAGS_OSZAPC_LOGIC_16(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SHL8(CPUX86State *env, uint8_t v, int count, uint8_t res)
{
int of = 0, cf = 0;
if (count <= 8) {
cf = (v >> (8 - count)) & 0x1;
of = cf ^ (res >> 7);
}
SET_FLAGS_OSZAPC_LOGIC_8(res);
SET_FLAGS_OxxxxC(env, of, cf);
SET_FLAGS_OSZAPC_8(0, diff);
}
bool get_PF(CPUX86State *env)
@ -228,34 +227,26 @@ void set_PF(CPUX86State *env, bool val)
env->hvf_emul->lflags.auxbits |= (temp << LF_BIT_PDB);
}
bool _get_OF(CPUX86State *env)
bool get_OF(CPUX86State *env)
{
return ((env->hvf_emul->lflags.auxbits + (1U << LF_BIT_PO)) >> LF_BIT_CF) & 1;
}
bool get_OF(CPUX86State *env)
{
return _get_OF(env);
}
bool _get_CF(CPUX86State *env)
bool get_CF(CPUX86State *env)
{
return (env->hvf_emul->lflags.auxbits >> LF_BIT_CF) & 1;
}
bool get_CF(CPUX86State *env)
{
return _get_CF(env);
}
void set_OF(CPUX86State *env, bool val)
{
SET_FLAGS_OxxxxC(env, val, _get_CF(env));
bool old_cf = get_CF(env);
SET_FLAGS_OxxxxC(env, val, old_cf);
}
void set_CF(CPUX86State *env, bool val)
{
SET_FLAGS_OxxxxC(env, _get_OF(env), (val));
bool old_of = get_OF(env);
SET_FLAGS_OxxxxC(env, old_of, val);
}
bool get_AF(CPUX86State *env)
@ -266,7 +257,7 @@ bool get_AF(CPUX86State *env)
void set_AF(CPUX86State *env, bool val)
{
env->hvf_emul->lflags.auxbits &= ~(LF_MASK_AF);
env->hvf_emul->lflags.auxbits |= (val) << LF_BIT_AF;
env->hvf_emul->lflags.auxbits |= val << LF_BIT_AF;
}
bool get_ZF(CPUX86State *env)

173
target/i386/hvf/x86_flags.h
View File

@ -25,156 +25,6 @@
#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);
@ -221,22 +71,11 @@ void SET_FLAGS_OSZAP_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2,
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_OSZAPC_LOGIC32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff);
void SET_FLAGS_OSZAPC_LOGIC16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff);
void SET_FLAGS_OSZAPC_LOGIC8(CPUX86State *env, uint8_t v1, uint8_t v2,
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__ */