Revision e1f3808e target-m68k/op_helper.c
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "exec.h" |
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#include "helpers.h" |
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#if defined(CONFIG_USER_ONLY) |
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} |
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#endif |
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static void raise_exception(int tt) |
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{
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env->exception_index = tt; |
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cpu_loop_exit(); |
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} |
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void HELPER(raise_exception)(uint32_t tt) |
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{
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raise_exception(tt); |
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} |
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void HELPER(divu)(CPUState *env, uint32_t word) |
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{
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uint32_t num; |
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uint32_t den; |
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uint32_t quot; |
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uint32_t rem; |
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uint32_t flags; |
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num = env->div1; |
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den = env->div2; |
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/* ??? This needs to make sure the throwing location is accurate. */ |
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if (den == 0) |
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raise_exception(EXCP_DIV0); |
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quot = num / den; |
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rem = num % den; |
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flags = 0; |
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/* Avoid using a PARAM1 of zero. This breaks dyngen because it uses |
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the address of a symbol, and gcc knows symbols can't have address |
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zero. */ |
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if (word && quot > 0xffff) |
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flags |= CCF_V; |
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if (quot == 0) |
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flags |= CCF_Z; |
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else if ((int32_t)quot < 0) |
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flags |= CCF_N; |
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env->div1 = quot; |
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env->div2 = rem; |
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env->cc_dest = flags; |
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} |
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void HELPER(divs)(CPUState *env, uint32_t word) |
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{
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int32_t num; |
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int32_t den; |
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int32_t quot; |
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int32_t rem; |
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int32_t flags; |
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num = env->div1; |
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den = env->div2; |
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if (den == 0) |
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raise_exception(EXCP_DIV0); |
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quot = num / den; |
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rem = num % den; |
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flags = 0; |
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if (word && quot != (int16_t)quot) |
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flags |= CCF_V; |
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if (quot == 0) |
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flags |= CCF_Z; |
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else if (quot < 0) |
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flags |= CCF_N; |
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env->div1 = quot; |
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env->div2 = rem; |
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env->cc_dest = flags; |
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} |
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