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fixed float to int overflow bug - added ARM host correct roundings for float rounding

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@237 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-06-15 19:49:16 +00:00
parent 79638566e5
commit 1e5ffbedde
2 changed files with 76 additions and 79 deletions
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75
helper-i386.c
View File

@ -19,6 +19,57 @@
*/ */
#include "exec-i386.h" #include "exec-i386.h"
const uint8_t parity_table[256] = {
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
};
/* modulo 17 table */
const uint8_t rclw_table[32] = {
0, 1, 2, 3, 4, 5, 6, 7,
8, 9,10,11,12,13,14,15,
16, 0, 1, 2, 3, 4, 5, 6,
7, 8, 9,10,11,12,13,14,
};
/* modulo 9 table */
const uint8_t rclb_table[32] = {
0, 1, 2, 3, 4, 5, 6, 7,
8, 0, 1, 2, 3, 4, 5, 6,
7, 8, 0, 1, 2, 3, 4, 5,
6, 7, 8, 0, 1, 2, 3, 4,
};
const CPU86_LDouble f15rk[7] = const CPU86_LDouble f15rk[7] =
{ {
0.00000000000000000000L, 0.00000000000000000000L,
@ -693,7 +744,29 @@ void helper_fsincos(void)
void helper_frndint(void) void helper_frndint(void)
{ {
ST0 = rint(ST0); CPU86_LDouble a;
a = ST0;
#ifdef __arm__
switch(env->fpuc & RC_MASK) {
default:
case RC_NEAR:
asm("rndd %0, %1" : "=f" (a) : "f"(a));
break;
case RC_DOWN:
asm("rnddm %0, %1" : "=f" (a) : "f"(a));
break;
case RC_UP:
asm("rnddp %0, %1" : "=f" (a) : "f"(a));
break;
case RC_CHOP:
asm("rnddz %0, %1" : "=f" (a) : "f"(a));
break;
}
#else
a = rint(a);
#endif
ST0 = a;
} }
void helper_fscale(void) void helper_fscale(void)

80
op-i386.c
View File

@ -19,57 +19,6 @@
*/ */
#include "exec-i386.h" #include "exec-i386.h"
uint8_t parity_table[256] = {
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
};
/* modulo 17 table */
const uint8_t rclw_table[32] = {
0, 1, 2, 3, 4, 5, 6, 7,
8, 9,10,11,12,13,14,15,
16, 0, 1, 2, 3, 4, 5, 6,
7, 8, 9,10,11,12,13,14,
};
/* modulo 9 table */
const uint8_t rclb_table[32] = {
0, 1, 2, 3, 4, 5, 6, 7,
8, 0, 1, 2, 3, 4, 5, 6,
7, 8, 0, 1, 2, 3, 4, 5,
6, 7, 8, 0, 1, 2, 3, 4,
};
/* n must be a constant to be efficient */ /* n must be a constant to be efficient */
static inline int lshift(int x, int n) static inline int lshift(int x, int n)
{ {
@ -624,33 +573,6 @@ void OPPROTO op_cmpxchg8b(void)
helper_cmpxchg8b(); helper_cmpxchg8b();
} }
#if defined(__powerpc__)
/* on PowerPC we patch the jump instruction directly */
#define JUMP_TB(tbparam, n, eip)\
do {\
static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
asm volatile ("b %0" : : "i" (&__op_jmp ## n));\
label ## n:\
T0 = (long)(tbparam) + (n);\
EIP = eip;\
} while (0)
#else
/* jump to next block operations (more portable code, does not need
cache flushing, but slower because of indirect jump) */
#define JUMP_TB(tbparam, n, eip)\
do {\
static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\
label ## n:\
T0 = (long)(tbparam) + (n);\
EIP = eip;\
} while (0)
#endif
void OPPROTO op_jmp_tb_next(void) void OPPROTO op_jmp_tb_next(void)
{ {
JUMP_TB(PARAM1, 0, PARAM2); JUMP_TB(PARAM1, 0, PARAM2);
@ -1561,6 +1483,8 @@ void OPPROTO op_fist_ST0_A0(void)
d = ST0; d = ST0;
val = lrint(d); val = lrint(d);
if (val != (int16_t)val)
val = -32768;
stw((void *)A0, val); stw((void *)A0, val);
} }