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Fix cntlzw emulation.

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This commit is contained in:
Maxim Poliakovski 2020-01-31 18:03:27 +01:00
parent 7d7b0b7de3
commit aad75266f7
1 changed files with 12 additions and 13 deletions
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25
cpu/ppc/ppcopcodes.cpp
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@ -823,13 +823,13 @@ void ppc_cntlzw() {
#ifdef USE_GCC_BUILTINS
lead = __builtin_clz(bit_check);
#elifdef USE_VS_BUILTINS
lead = __lzcnt(bit_check);
#elif defined USE_VS_BUILTINS
lead = __lzcnt(bit_check);
#else
do {
bit_check >>= 1;
++lead;
} while (bit_check > 0);
for (uint32_t mask = 0x80000000UL; mask; lead++, mask >>= 1) {
if (bit_check & mask)
break;
}
#endif
ppc_result_a = lead;
ppc_store_result_rega();
@ -843,15 +843,14 @@ void ppc_cntlzwdot() {
#ifdef USE_GCC_BUILTINS
lead = __builtin_clz(bit_check);
#elifdef USE_VS_BUILTINS
lead = __lzcnt(bit_check);
#elif defined USE_VS_BUILTINS
lead = __lzcnt(bit_check);
#else
do {
bit_check >>= 1;
++lead;
} while (bit_check > 0);
for (uint32_t mask = 0x80000000UL; mask; lead++, mask >>= 1) {
if (bit_check & mask)
break;
}
#endif
ppc_result_a = lead;
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();