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Add sharable clz/clo inline functions and use them for the mips target.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3455 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-10-27 13:05:54 +00:00
parent 5592a750b9
commit 05f778c8bd
4 changed files with 137 additions and 49 deletions
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2
target-mips/exec.h
View file

@ -70,6 +70,8 @@ void do_dsllv (void);
void do_dsrav (void);
void do_dsrlv (void);
void do_drotrv (void);
void do_dclo (void);
void do_dclz (void);
#endif
#endif

67
target-mips/op.c
View file

@ -22,6 +22,7 @@
#include "config.h"
#include "exec.h"
#include "host-utils.h"
#ifndef CALL_FROM_TB0
#define CALL_FROM_TB0(func) func()
@ -537,35 +538,13 @@ void op_rotrv (void)
void op_clo (void)
{
int n;
if (T0 == ~((target_ulong)0)) {
T0 = 32;
} else {
for (n = 0; n < 32; n++) {
if (!(((int32_t)T0) & (1 << 31)))
break;
T0 <<= 1;
}
T0 = n;
}
T0 = clo32(T0);
RETURN();
}
void op_clz (void)
{
int n;
if (T0 == 0) {
T0 = 32;
} else {
for (n = 0; n < 32; n++) {
if (T0 & (1 << 31))
break;
T0 <<= 1;
}
T0 = n;
}
T0 = clz32(T0);
RETURN();
}
@ -645,6 +624,18 @@ void op_drotrv (void)
RETURN();
}
void op_dclo (void)
{
CALL_FROM_TB0(do_dclo);
RETURN();
}
void op_dclz (void)
{
CALL_FROM_TB0(do_dclz);
RETURN();
}
#else /* TARGET_LONG_BITS > HOST_LONG_BITS */
void op_dsll (void)
@ -735,41 +726,19 @@ void op_drotrv (void)
T0 = T1;
RETURN();
}
#endif /* TARGET_LONG_BITS > HOST_LONG_BITS */
void op_dclo (void)
{
int n;
if (T0 == ~((target_ulong)0)) {
T0 = 64;
} else {
for (n = 0; n < 64; n++) {
if (!(T0 & (1ULL << 63)))
break;
T0 <<= 1;
}
T0 = n;
}
T0 = clo64(T0);
RETURN();
}
void op_dclz (void)
{
int n;
if (T0 == 0) {
T0 = 64;
} else {
for (n = 0; n < 64; n++) {
if (T0 & (1ULL << 63))
break;
T0 <<= 1;
}
T0 = n;
}
T0 = clz64(T0);
RETURN();
}
#endif /* TARGET_LONG_BITS > HOST_LONG_BITS */
#endif /* TARGET_MIPSN32 || TARGET_MIPS64 */
/* 64 bits arithmetic */

13
target-mips/op_helper.c
View file

@ -20,6 +20,8 @@
#include <stdlib.h>
#include "exec.h"
#include "host-utils.h"
#define GETPC() (__builtin_return_address(0))
/*****************************************************************************/
@ -141,6 +143,17 @@ void do_drotrv (void)
} else
T0 = T1;
}
void do_dclo (void)
{
T0 = clo64(T0);
}
void do_dclz (void)
{
T0 = clz64(T0);
}
#endif /* TARGET_LONG_BITS > HOST_LONG_BITS */
#endif /* TARGET_MIPSN32 || TARGET_MIPS64 */