diff options
Diffstat (limited to 'op-i386.c')
| -rw-r--r-- | op-i386.c | 200 |
1 files changed, 191 insertions, 9 deletions
diff --git a/op-i386.c b/op-i386.c index 69bd4cffca..befa39f4df 100644 --- a/op-i386.c +++ b/op-i386.c @@ -1073,7 +1073,7 @@ void helper_cpuid(void) EBX = 0x756e6547; ECX = 0x6c65746e; EDX = 0x49656e69; - } else { + } else if (EAX == 1) { /* EAX = 1 info */ EAX = 0x52b; EBX = 0; @@ -1899,17 +1899,22 @@ void OPPROTO op_fldt_ST0_A0(void) ST0 = *(long double *)A0; } #else -void helper_fldt_ST0_A0(void) +static inline CPU86_LDouble helper_fldt(uint8_t *ptr) { CPU86_LDoubleU temp; int upper, e; /* mantissa */ - upper = lduw((uint8_t *)A0 + 8); + upper = lduw(ptr + 8); /* XXX: handle overflow ? */ e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */ e |= (upper >> 4) & 0x800; /* sign */ - temp.ll = ((ldq((void *)A0) >> 11) & ((1LL << 52) - 1)) | ((uint64_t)e << 52); - ST0 = temp.d; + temp.ll = ((ldq(ptr) >> 11) & ((1LL << 52) - 1)) | ((uint64_t)e << 52); + return temp.d; +} + +void helper_fldt_ST0_A0(void) +{ + ST0 = helper_fldt((uint8_t *)A0); } void OPPROTO op_fldt_ST0_A0(void) @@ -2008,17 +2013,23 @@ void OPPROTO op_fstt_ST0_A0(void) *(long double *)A0 = ST0; } #else -void helper_fstt_ST0_A0(void) + +static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr) { CPU86_LDoubleU temp; int e; - temp.d = ST0; + temp.d = f; /* mantissa */ - stq((void *)A0, (MANTD(temp) << 11) | (1LL << 63)); + stq(ptr, (MANTD(temp) << 11) | (1LL << 63)); /* exponent + sign */ e = EXPD(temp) - EXPBIAS + 16383; e |= SIGND(temp) >> 16; - stw((uint8_t *)A0 + 8, e); + stw(ptr + 8, e); +} + +void helper_fstt_ST0_A0(void) +{ + helper_fstt(ST0, (uint8_t *)A0); } void OPPROTO op_fstt_ST0_A0(void) @@ -2254,6 +2265,34 @@ void OPPROTO op_fucom_ST0_FT0(void) FORCE_RET(); } +/* XXX: handle nans */ +void OPPROTO op_fcomi_ST0_FT0(void) +{ + int eflags; + eflags = cc_table[CC_OP].compute_all(); + eflags &= ~(CC_Z | CC_P | CC_C); + if (ST0 < FT0) + eflags |= CC_C; + else if (ST0 == FT0) + eflags |= CC_Z; + CC_SRC = eflags; + FORCE_RET(); +} + +/* XXX: handle nans */ +void OPPROTO op_fucomi_ST0_FT0(void) +{ + int eflags; + eflags = cc_table[CC_OP].compute_all(); + eflags &= ~(CC_Z | CC_P | CC_C); + if (ST0 < FT0) + eflags |= CC_C; + else if (ST0 == FT0) + eflags |= CC_Z; + CC_SRC = eflags; + FORCE_RET(); +} + void OPPROTO op_fadd_ST0_FT0(void) { ST0 += FT0; @@ -2750,6 +2789,149 @@ void OPPROTO op_fninit(void) env->fptags[7] = 1; } +void helper_fstenv(uint8_t *ptr, int data32) +{ + int fpus, fptag, exp, i; + uint64_t mant; + CPU86_LDoubleU tmp; + + fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; + fptag = 0; + for (i=7; i>=0; i--) { + fptag <<= 2; + if (env->fptags[i]) { + fptag |= 3; + } else { + tmp.d = env->fpregs[i]; + exp = EXPD(tmp); + mant = MANTD(tmp); + if (exp == 0 && mant == 0) { + /* zero */ + fptag |= 1; + } else if (exp == 0 || exp == MAXEXPD +#ifdef USE_X86LDOUBLE + || (mant & (1LL << 63)) == 0 +#endif + ) { + /* NaNs, infinity, denormal */ + fptag |= 2; + } + } + } + if (data32) { + /* 32 bit */ + stl(ptr, env->fpuc); + stl(ptr + 4, fpus); + stl(ptr + 8, fptag); + stl(ptr + 12, 0); + stl(ptr + 16, 0); + stl(ptr + 20, 0); + stl(ptr + 24, 0); + } else { + /* 16 bit */ + stw(ptr, env->fpuc); + stw(ptr + 2, fpus); + stw(ptr + 4, fptag); + stw(ptr + 6, 0); + stw(ptr + 8, 0); + stw(ptr + 10, 0); + stw(ptr + 12, 0); + } +} + +void helper_fldenv(uint8_t *ptr, int data32) +{ + int i, fpus, fptag; + + if (data32) { + env->fpuc = lduw(ptr); + fpus = lduw(ptr + 4); + fptag = lduw(ptr + 8); + } + else { + env->fpuc = lduw(ptr); + fpus = lduw(ptr + 2); + fptag = lduw(ptr + 4); + } + env->fpstt = (fpus >> 11) & 7; + env->fpus = fpus & ~0x3800; + for(i = 0;i < 7; i++) { + env->fptags[i] = ((fptag & 3) == 3); + fptag >>= 2; + } +} + +void helper_fsave(uint8_t *ptr, int data32) +{ + CPU86_LDouble tmp; + int i; + + helper_fstenv(ptr, data32); + + ptr += (14 << data32); + for(i = 0;i < 8; i++) { + tmp = ST(i); +#ifdef USE_X86LDOUBLE + *(long double *)ptr = tmp; +#else + helper_fstt(tmp, ptr); +#endif + ptr += 10; + } + + /* fninit */ + env->fpus = 0; + env->fpstt = 0; + env->fpuc = 0x37f; + env->fptags[0] = 1; + env->fptags[1] = 1; + env->fptags[2] = 1; + env->fptags[3] = 1; + env->fptags[4] = 1; + env->fptags[5] = 1; + env->fptags[6] = 1; + env->fptags[7] = 1; +} + +void helper_frstor(uint8_t *ptr, int data32) +{ + CPU86_LDouble tmp; + int i; + + helper_fldenv(ptr, data32); + ptr += (14 << data32); + + for(i = 0;i < 8; i++) { +#ifdef USE_X86LDOUBLE + tmp = *(long double *)ptr; +#else + tmp = helper_fldt(ptr); +#endif + ST(i) = tmp; + ptr += 10; + } +} + +void OPPROTO op_fnstenv_A0(void) +{ + helper_fstenv((uint8_t *)A0, PARAM1); +} + +void OPPROTO op_fldenv_A0(void) +{ + helper_fldenv((uint8_t *)A0, PARAM1); +} + +void OPPROTO op_fnsave_A0(void) +{ + helper_fsave((uint8_t *)A0, PARAM1); +} + +void OPPROTO op_frstor_A0(void) +{ + helper_frstor((uint8_t *)A0, PARAM1); +} + /* threading support */ void OPPROTO op_lock(void) { |