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Cleaning up function registers and setting up CR.

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This commit is contained in:
Ben Vanik
2013-01-26 01:25:31 -08:00
parent 9b3d96a8ae
commit 733fe85d37
5 changed files with 267 additions and 159 deletions
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12
include/xenia/cpu/ppc/instr.h
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@@ -62,6 +62,18 @@ static inline int32_t XEEXTS16(uint32_t v) {
static inline int32_t XEEXTS26(uint32_t v) {
return v & 0x02000000 ? (int32_t)v | 0xFC000000 : (int32_t)(v);
}
static inline uint64_t XEMASK(uint32_t mstart, uint32_t mstop) {
// if mstart ≤ mstop then
// mask[mstart:mstop] = ones
// mask[all other bits] = zeros
// else
// mask[mstart:63] = ones
// mask[0:mstop] = ones
// mask[all other bits] = zeros
uint64_t value =
(UINT64_MAX >> mstart) ^ ((mstop >= 63) ? 0 : UINT64_MAX >> (mstop + 1));
return mstart <= mstop ? value : ~value;
}
typedef struct {