diff options
Diffstat (limited to 'op-i386.c')
| -rw-r--r-- | op-i386.c | 48 |
1 files changed, 13 insertions, 35 deletions
@@ -119,40 +119,6 @@ static inline int lshift(int x, int n) return x >> (-n); } -/* exception support */ -/* NOTE: not static to force relocation generation by GCC */ -void raise_exception(int exception_index) -{ - /* NOTE: the register at this point must be saved by hand because - longjmp restore them */ -#ifdef reg_EAX - env->regs[R_EAX] = EAX; -#endif -#ifdef reg_ECX - env->regs[R_ECX] = ECX; -#endif -#ifdef reg_EDX - env->regs[R_EDX] = EDX; -#endif -#ifdef reg_EBX - env->regs[R_EBX] = EBX; -#endif -#ifdef reg_ESP - env->regs[R_ESP] = ESP; -#endif -#ifdef reg_EBP - env->regs[R_EBP] = EBP; -#endif -#ifdef reg_ESI - env->regs[R_ESI] = ESI; -#endif -#ifdef reg_EDI - env->regs[R_EDI] = EDI; -#endif - env->exception_index = exception_index; - longjmp(env->jmp_env, 1); -} - /* we define the various pieces of code used by the JIT */ #define REG EAX @@ -391,13 +357,15 @@ void OPPROTO op_imull_T0_T1(void) } /* division, flags are undefined */ -/* XXX: add exceptions for overflow & div by zero */ +/* XXX: add exceptions for overflow */ void OPPROTO op_divb_AL_T0(void) { unsigned int num, den, q, r; num = (EAX & 0xffff); den = (T0 & 0xff); + if (den == 0) + raise_exception(EXCP00_DIVZ); q = (num / den) & 0xff; r = (num % den) & 0xff; EAX = (EAX & 0xffff0000) | (r << 8) | q; @@ -409,6 +377,8 @@ void OPPROTO op_idivb_AL_T0(void) num = (int16_t)EAX; den = (int8_t)T0; + if (den == 0) + raise_exception(EXCP00_DIVZ); q = (num / den) & 0xff; r = (num % den) & 0xff; EAX = (EAX & 0xffff0000) | (r << 8) | q; @@ -420,6 +390,8 @@ void OPPROTO op_divw_AX_T0(void) num = (EAX & 0xffff) | ((EDX & 0xffff) << 16); den = (T0 & 0xffff); + if (den == 0) + raise_exception(EXCP00_DIVZ); q = (num / den) & 0xffff; r = (num % den) & 0xffff; EAX = (EAX & 0xffff0000) | q; @@ -432,6 +404,8 @@ void OPPROTO op_idivw_AX_T0(void) num = (EAX & 0xffff) | ((EDX & 0xffff) << 16); den = (int16_t)T0; + if (den == 0) + raise_exception(EXCP00_DIVZ); q = (num / den) & 0xffff; r = (num % den) & 0xffff; EAX = (EAX & 0xffff0000) | q; @@ -445,6 +419,8 @@ void OPPROTO op_divl_EAX_T0(void) num = EAX | ((uint64_t)EDX << 32); den = T0; + if (den == 0) + raise_exception(EXCP00_DIVZ); q = (num / den); r = (num % den); EAX = q; @@ -458,6 +434,8 @@ void OPPROTO op_idivl_EAX_T0(void) num = EAX | ((uint64_t)EDX << 32); den = T0; + if (den == 0) + raise_exception(EXCP00_DIVZ); q = (num / den); r = (num % den); EAX = q; |