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ppcfpopcodes: Fix mcrfs.

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joevt 2023-12-17 05:03:36 -08:00 committed by Maxim Poliakovski
parent 593508df22
commit 61a90e2cfb
1 changed files with 14 additions and 6 deletions
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20
cpu/ppc/ppcfpopcodes.cpp
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@ -923,12 +923,20 @@ void dppc_interpreter::ppc_mtfsb1() {
} }
void dppc_interpreter::ppc_mcrfs() { void dppc_interpreter::ppc_mcrfs() {
crf_d = (ppc_cur_instruction >> 23) & 7; int crf_d = (ppc_cur_instruction >> 21) & 0x1C;
crf_d = crf_d << 2; int crf_s = (ppc_cur_instruction >> 16) & 0x1C;
crf_s = (ppc_cur_instruction >> 18) & 7; ppc_state.cr = (
crf_s = crf_d << 2; (ppc_state.cr & ~(0xF0000000UL >> crf_d)) |
ppc_state.cr = ~(ppc_state.cr & ((15 << (28 - crf_d)))) + (((ppc_state.fpscr << crf_s) & 0xF0000000UL) >> crf_d)
(ppc_state.fpscr & (15 << (28 - crf_s))); );
ppc_state.fpscr &= ~((0xF0000000UL >> crf_s) & (
// keep only the FPSCR bits that can be explicitly cleared
FPSCR::FX | FPSCR::OX |
FPSCR::UX | FPSCR::ZX | FPSCR::XX | FPSCR::VXSNAN |
FPSCR::VXISI | FPSCR::VXIDI | FPSCR::VXZDZ | FPSCR::VXIMZ |
FPSCR::VXVC |
FPSCR::VXSOFT | FPSCR::VXSQRT | FPSCR::VXCVI
));
} }
// Floating Point Comparisons // Floating Point Comparisons