Revision 1f1af9fd
| b/target-i386/cpu.h | ||
|---|---|---|
| 408 | 408 |
#endif |
| 409 | 409 |
} |
| 410 | 410 |
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| 411 |
/* used for debug or cpu save/restore */ |
|
| 412 |
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f); |
|
| 413 |
CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper); |
|
| 414 |
|
|
| 411 | 415 |
/* the following helpers are only usable in user mode simulation as |
| 412 | 416 |
they can trigger unexpected exceptions */ |
| 413 | 417 |
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector); |
| b/target-i386/helper.c | ||
|---|---|---|
| 2005 | 2005 |
|
| 2006 | 2006 |
/* BCD ops */ |
| 2007 | 2007 |
|
| 2008 |
#define MUL10(iv) ( iv + iv + (iv << 3) ) |
|
| 2009 |
|
|
| 2010 | 2008 |
void helper_fbld_ST0_A0(void) |
| 2011 | 2009 |
{
|
| 2012 | 2010 |
CPU86_LDouble tmp; |
| ... | ... | |
| 2431 | 2429 |
} |
| 2432 | 2430 |
} |
| 2433 | 2431 |
|
| 2432 |
/* XXX: merge with helper_fstt ? */ |
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| 2433 |
|
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| 2434 |
#ifndef USE_X86LDOUBLE |
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| 2435 |
|
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| 2436 |
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f) |
|
| 2437 |
{
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| 2438 |
CPU86_LDoubleU temp; |
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| 2439 |
int e; |
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| 2440 |
|
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| 2441 |
temp.d = f; |
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| 2442 |
/* mantissa */ |
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| 2443 |
*pmant = (MANTD(temp) << 11) | (1LL << 63); |
|
| 2444 |
/* exponent + sign */ |
|
| 2445 |
e = EXPD(temp) - EXPBIAS + 16383; |
|
| 2446 |
e |= SIGND(temp) >> 16; |
|
| 2447 |
*pexp = e; |
|
| 2448 |
} |
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| 2449 |
|
|
| 2450 |
CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper) |
|
| 2451 |
{
|
|
| 2452 |
CPU86_LDoubleU temp; |
|
| 2453 |
int e; |
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| 2454 |
uint64_t ll; |
|
| 2455 |
|
|
| 2456 |
/* XXX: handle overflow ? */ |
|
| 2457 |
e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */ |
|
| 2458 |
e |= (upper >> 4) & 0x800; /* sign */ |
|
| 2459 |
ll = (mant >> 11) & ((1LL << 52) - 1); |
|
| 2460 |
#ifdef __arm__ |
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| 2461 |
temp.l.upper = (e << 20) | (ll >> 32); |
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| 2462 |
temp.l.lower = ll; |
|
| 2463 |
#else |
|
| 2464 |
temp.ll = ll | ((uint64_t)e << 52); |
|
| 2465 |
#endif |
|
| 2466 |
return temp.d; |
|
| 2467 |
} |
|
| 2468 |
|
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| 2469 |
#else |
|
| 2470 |
|
|
| 2471 |
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f) |
|
| 2472 |
{
|
|
| 2473 |
CPU86_LDoubleU temp; |
|
| 2474 |
|
|
| 2475 |
temp.d = f; |
|
| 2476 |
*pmant = temp.l.lower; |
|
| 2477 |
*pexp = temp.l.upper; |
|
| 2478 |
} |
|
| 2479 |
|
|
| 2480 |
CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper) |
|
| 2481 |
{
|
|
| 2482 |
CPU86_LDoubleU temp; |
|
| 2483 |
|
|
| 2484 |
temp.l.upper = upper; |
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| 2485 |
temp.l.lower = mant; |
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| 2486 |
return temp.d; |
|
| 2487 |
} |
|
| 2488 |
#endif |
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| 2489 |
|
|
| 2434 | 2490 |
#if !defined(CONFIG_USER_ONLY) |
| 2435 | 2491 |
|
| 2436 | 2492 |
#define MMUSUFFIX _mmu |
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