2 * i386 execution defines
4 * Copyright (c) 2003 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include "dyngen-exec.h"
22 /* at least 4 register variables are defines */
23 register struct CPUX86State *env asm(AREG0);
24 register uint32_t T0 asm(AREG1);
25 register uint32_t T1 asm(AREG2);
26 register uint32_t T2 asm(AREG3);
30 /* if more registers are available, we define some registers too */
32 register uint32_t EAX asm(AREG4);
37 register uint32_t ESP asm(AREG5);
42 register uint32_t EBP asm(AREG6);
47 register uint32_t ECX asm(AREG7);
52 register uint32_t EDX asm(AREG8);
57 register uint32_t EBX asm(AREG9);
62 register uint32_t ESI asm(AREG10);
67 register uint32_t EDI asm(AREG11);
75 #define EAX (env->regs[R_EAX])
78 #define ECX (env->regs[R_ECX])
81 #define EDX (env->regs[R_EDX])
84 #define EBX (env->regs[R_EBX])
87 #define ESP (env->regs[R_ESP])
90 #define EBP (env->regs[R_EBP])
93 #define ESI (env->regs[R_ESI])
96 #define EDI (env->regs[R_EDI])
98 #define EIP (env->eip)
101 #define CC_SRC (env->cc_src)
102 #define CC_DST (env->cc_dst)
103 #define CC_OP (env->cc_op)
106 #define FT0 (env->ft0)
107 #define ST0 (env->fpregs[env->fpstt])
108 #define ST(n) (env->fpregs[(env->fpstt + (n)) & 7])
111 #ifdef USE_FP_CONVERT
112 #define FP_CONVERT (env->fp_convert)
115 #include "cpu-i386.h"
118 typedef struct CCTable {
119 int (*compute_all)(void); /* return all the flags */
120 int (*compute_c)(void); /* return the C flag */
123 extern CCTable cc_table[];
125 void load_seg(int seg_reg, int selector, unsigned cur_eip);
126 void jmp_seg(int selector, unsigned int new_eip);
127 void helper_iret_protected(int shift);
128 void helper_lldt_T0(void);
129 void helper_ltr_T0(void);
130 void helper_movl_crN_T0(int reg);
131 void helper_movl_drN_T0(int reg);
132 void helper_invlpg(unsigned int addr);
133 void cpu_x86_update_cr0(CPUX86State *env);
134 void cpu_x86_update_cr3(CPUX86State *env);
135 void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr);
136 int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write);
137 void __hidden cpu_lock(void);
138 void __hidden cpu_unlock(void);
139 void do_interrupt(int intno, int is_int, int error_code,
140 unsigned int next_eip);
141 void do_interrupt_user(int intno, int is_int, int error_code,
142 unsigned int next_eip);
143 void raise_interrupt(int intno, int is_int, int error_code,
144 unsigned int next_eip);
145 void raise_exception_err(int exception_index, int error_code);
146 void raise_exception(int exception_index);
147 void __hidden cpu_loop_exit(void);
148 void helper_fsave(uint8_t *ptr, int data32);
149 void helper_frstor(uint8_t *ptr, int data32);
151 void OPPROTO op_movl_eflags_T0(void);
152 void OPPROTO op_movl_T0_eflags(void);
153 void raise_interrupt(int intno, int is_int, int error_code,
154 unsigned int next_eip);
155 void raise_exception_err(int exception_index, int error_code);
156 void raise_exception(int exception_index);
157 void helper_divl_EAX_T0(uint32_t eip);
158 void helper_idivl_EAX_T0(uint32_t eip);
159 void helper_cmpxchg8b(void);
160 void helper_cpuid(void);
161 void helper_rdtsc(void);
162 void helper_lsl(void);
163 void helper_lar(void);
165 #ifdef USE_X86LDOUBLE
166 /* use long double functions */
168 #define llrint llrintl
182 extern int lrint(CPU86_LDouble x);
183 extern int64_t llrint(CPU86_LDouble x);
184 extern CPU86_LDouble fabs(CPU86_LDouble x);
185 extern CPU86_LDouble sin(CPU86_LDouble x);
186 extern CPU86_LDouble cos(CPU86_LDouble x);
187 extern CPU86_LDouble sqrt(CPU86_LDouble x);
188 extern CPU86_LDouble pow(CPU86_LDouble, CPU86_LDouble);
189 extern CPU86_LDouble log(CPU86_LDouble x);
190 extern CPU86_LDouble tan(CPU86_LDouble x);
191 extern CPU86_LDouble atan2(CPU86_LDouble, CPU86_LDouble);
192 extern CPU86_LDouble floor(CPU86_LDouble x);
193 extern CPU86_LDouble ceil(CPU86_LDouble x);
194 extern CPU86_LDouble rint(CPU86_LDouble x);
196 #define RC_MASK 0xc00
197 #define RC_NEAR 0x000
198 #define RC_DOWN 0x400
200 #define RC_CHOP 0xc00
202 #define MAXTAN 9223372036854775808.0
205 /* we have no way to do correct rounding - a FPU emulator is needed */
206 #define FE_DOWNWARD FE_TONEAREST
207 #define FE_UPWARD FE_TONEAREST
208 #define FE_TOWARDZERO FE_TONEAREST
211 #ifdef USE_X86LDOUBLE
217 unsigned long long lower;
218 unsigned short upper;
222 /* the following deal with x86 long double-precision numbers */
223 #define MAXEXPD 0x7fff
224 #define EXPBIAS 16383
225 #define EXPD(fp) (fp.l.upper & 0x7fff)
226 #define SIGND(fp) ((fp.l.upper) & 0x8000)
227 #define MANTD(fp) (fp.l.lower)
228 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
232 /* NOTE: arm is horrible as double 32 bit words are stored in big endian ! */
235 #if !defined(WORDS_BIGENDIAN) && !defined(__arm__)
251 /* the following deal with IEEE double-precision numbers */
252 #define MAXEXPD 0x7ff
254 #define EXPD(fp) (((fp.l.upper) >> 20) & 0x7FF)
255 #define SIGND(fp) ((fp.l.upper) & 0x80000000)
257 #define MANTD(fp) (fp.l.lower | ((uint64_t)(fp.l.upper & ((1 << 20) - 1)) << 32))
259 #define MANTD(fp) (fp.ll & ((1LL << 52) - 1))
261 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)
264 static inline void fpush(void)
266 env->fpstt = (env->fpstt - 1) & 7;
267 env->fptags[env->fpstt] = 0; /* validate stack entry */
270 static inline void fpop(void)
272 env->fptags[env->fpstt] = 1; /* invvalidate stack entry */
273 env->fpstt = (env->fpstt + 1) & 7;
276 #ifndef USE_X86LDOUBLE
277 static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
284 upper = lduw(ptr + 8);
285 /* XXX: handle overflow ? */
286 e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */
287 e |= (upper >> 4) & 0x800; /* sign */
288 ll = (ldq(ptr) >> 11) & ((1LL << 52) - 1);
290 temp.l.upper = (e << 20) | (ll >> 32);
293 temp.ll = ll | ((uint64_t)e << 52);
298 static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)
305 stq(ptr, (MANTD(temp) << 11) | (1LL << 63));
306 /* exponent + sign */
307 e = EXPD(temp) - EXPBIAS + 16383;
308 e |= SIGND(temp) >> 16;
313 const CPU86_LDouble f15rk[7];
315 void helper_fldt_ST0_A0(void);
316 void helper_fstt_ST0_A0(void);
317 void helper_fbld_ST0_A0(void);
318 void helper_fbst_ST0_A0(void);
319 void helper_f2xm1(void);
320 void helper_fyl2x(void);
321 void helper_fptan(void);
322 void helper_fpatan(void);
323 void helper_fxtract(void);
324 void helper_fprem1(void);
325 void helper_fprem(void);
326 void helper_fyl2xp1(void);
327 void helper_fsqrt(void);
328 void helper_fsincos(void);
329 void helper_frndint(void);
330 void helper_fscale(void);
331 void helper_fsin(void);
332 void helper_fcos(void);
333 void helper_fxam_ST0(void);
334 void helper_fstenv(uint8_t *ptr, int data32);
335 void helper_fldenv(uint8_t *ptr, int data32);
336 void helper_fsave(uint8_t *ptr, int data32);
337 void helper_frstor(uint8_t *ptr, int data32);
339 const uint8_t parity_table[256];
340 const uint8_t rclw_table[32];
341 const uint8_t rclb_table[32];
343 static inline uint32_t compute_eflags(void)
345 return env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
348 #define FL_UPDATE_MASK32 (TF_MASK | AC_MASK | ID_MASK)
350 #define FL_UPDATE_CPL0_MASK (TF_MASK | IF_MASK | IOPL_MASK | NT_MASK | \
351 RF_MASK | AC_MASK | ID_MASK)
353 /* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */
354 static inline void load_eflags(int eflags, int update_mask)
356 CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
357 DF = 1 - (2 * ((eflags >> 10) & 1));
358 env->eflags = (env->eflags & ~update_mask) |
359 (eflags & update_mask);