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Convert m68k target to TCG.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4565 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-05-24 22:29:16 +00:00
parent 3979144c49
commit e1f3808e03
11 changed files with 1574 additions and 2352 deletions
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69
target-m68k/op_helper.c
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@ -18,6 +18,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "exec.h"
#include "helpers.h"
#if defined(CONFIG_USER_ONLY)
@ -161,3 +162,71 @@ void do_interrupt(int is_hw)
}
#endif
static void raise_exception(int tt)
{
env->exception_index = tt;
cpu_loop_exit();
}
void HELPER(raise_exception)(uint32_t tt)
{
raise_exception(tt);
}
void HELPER(divu)(CPUState *env, uint32_t word)
{
uint32_t num;
uint32_t den;
uint32_t quot;
uint32_t rem;
uint32_t flags;
num = env->div1;
den = env->div2;
/* ??? This needs to make sure the throwing location is accurate. */
if (den == 0)
raise_exception(EXCP_DIV0);
quot = num / den;
rem = num % den;
flags = 0;
/* Avoid using a PARAM1 of zero. This breaks dyngen because it uses
the address of a symbol, and gcc knows symbols can't have address
zero. */
if (word && quot > 0xffff)
flags |= CCF_V;
if (quot == 0)
flags |= CCF_Z;
else if ((int32_t)quot < 0)
flags |= CCF_N;
env->div1 = quot;
env->div2 = rem;
env->cc_dest = flags;
}
void HELPER(divs)(CPUState *env, uint32_t word)
{
int32_t num;
int32_t den;
int32_t quot;
int32_t rem;
int32_t flags;
num = env->div1;
den = env->div2;
if (den == 0)
raise_exception(EXCP_DIV0);
quot = num / den;
rem = num % den;
flags = 0;
if (word && quot != (int16_t)quot)
flags |= CCF_V;
if (quot == 0)
flags |= CCF_Z;
else if (quot < 0)
flags |= CCF_N;
env->div1 = quot;
env->div2 = rem;
env->cc_dest = flags;
}