mirror of
https://github.com/yuzu-emu/yuzu.git
synced 2024-11-30 20:34:24 +01:00
Corrections, documenting and fixes.
This commit is contained in:
parent
ecccfe0337
commit
a8d4927e29
@ -3,31 +3,32 @@
|
|||||||
|
|
||||||
#pragma intrinsic(_umul128)
|
#pragma intrinsic(_umul128)
|
||||||
#endif
|
#endif
|
||||||
|
#include <cstring>
|
||||||
#include "common/uint128.h"
|
#include "common/uint128.h"
|
||||||
|
|
||||||
namespace Common {
|
namespace Common {
|
||||||
|
|
||||||
u128 Multiply64Into128(u64 a, u64 b) {
|
u128 Multiply64Into128(u64 a, u64 b) {
|
||||||
#ifdef _MSC_VER
|
|
||||||
u128 result;
|
u128 result;
|
||||||
|
#ifdef _MSC_VER
|
||||||
result[0] = _umul128(a, b, &result[1]);
|
result[0] = _umul128(a, b, &result[1]);
|
||||||
#else
|
#else
|
||||||
unsigned __int128 tmp = a;
|
unsigned __int128 tmp = a;
|
||||||
tmp *= b;
|
tmp *= b;
|
||||||
u128 result;
|
|
||||||
std::memcpy(&result, &tmp, sizeof(u128));
|
std::memcpy(&result, &tmp, sizeof(u128));
|
||||||
#endif
|
#endif
|
||||||
return result;
|
return result;
|
||||||
}
|
}
|
||||||
|
|
||||||
std::pair<u64, u64> Divide128On64(u128 dividend, u64 divisor) {
|
std::pair<u64, u64> Divide128On32(u128 dividend, u32 divisor) {
|
||||||
u64 remainder = dividend[0] % divisor;
|
u64 remainder = dividend[0] % divisor;
|
||||||
u64 accum = dividend[0] / divisor;
|
u64 accum = dividend[0] / divisor;
|
||||||
if (dividend[1] == 0)
|
if (dividend[1] == 0)
|
||||||
return {accum, remainder};
|
return {accum, remainder};
|
||||||
// We ignore dividend[1] / divisor as that overflows
|
// We ignore dividend[1] / divisor as that overflows
|
||||||
u64 first_segment = (dividend[1] % divisor) << 32;
|
const u64 first_segment = (dividend[1] % divisor) << 32;
|
||||||
accum += (first_segment / divisor) << 32;
|
accum += (first_segment / divisor) << 32;
|
||||||
u64 second_segment = (first_segment % divisor) << 32;
|
const u64 second_segment = (first_segment % divisor) << 32;
|
||||||
accum += (second_segment / divisor);
|
accum += (second_segment / divisor);
|
||||||
remainder += second_segment % divisor;
|
remainder += second_segment % divisor;
|
||||||
if (remainder >= divisor) {
|
if (remainder >= divisor) {
|
||||||
|
@ -1,13 +1,14 @@
|
|||||||
#include <array>
|
|
||||||
#include <cstdint>
|
|
||||||
#include <cstring>
|
|
||||||
#include <utility>
|
#include <utility>
|
||||||
#include "common/common_types.h"
|
#include "common/common_types.h"
|
||||||
|
|
||||||
namespace Common {
|
namespace Common {
|
||||||
|
|
||||||
|
// This function multiplies 2 u64 values and produces a u128 value;
|
||||||
u128 Multiply64Into128(u64 a, u64 b);
|
u128 Multiply64Into128(u64 a, u64 b);
|
||||||
|
|
||||||
std::pair<u64, u64> Divide128On64(u128 dividend, u64 divisor);
|
// This function divides a u128 by a u32 value and produces two u64 values:
|
||||||
|
// the result of division and the remainder
|
||||||
|
std::pair<u64, u64> Divide128On32(u128 dividend, u32 divisor);
|
||||||
|
|
||||||
} // namespace Common
|
} // namespace Common
|
||||||
|
@ -152,7 +152,7 @@ std::unique_ptr<Dynarmic::A64::Jit> ARM_Dynarmic::MakeJit() const {
|
|||||||
config.tpidr_el0 = &cb->tpidr_el0;
|
config.tpidr_el0 = &cb->tpidr_el0;
|
||||||
config.dczid_el0 = 4;
|
config.dczid_el0 = 4;
|
||||||
config.ctr_el0 = 0x8444c004;
|
config.ctr_el0 = 0x8444c004;
|
||||||
config.cntfrq_el0 = Timing::CNTFREQ; // Value from fusee.
|
config.cntfrq_el0 = Timing::CNTFREQ;
|
||||||
|
|
||||||
// Unpredictable instructions
|
// Unpredictable instructions
|
||||||
config.define_unpredictable_behaviour = true;
|
config.define_unpredictable_behaviour = true;
|
||||||
|
@ -62,9 +62,8 @@ s64 nsToCycles(u64 ns) {
|
|||||||
}
|
}
|
||||||
|
|
||||||
u64 CpuCyclesToClockCycles(u64 ticks) {
|
u64 CpuCyclesToClockCycles(u64 ticks) {
|
||||||
u128 temporal = Common::Multiply64Into128(ticks, CNTFREQ);
|
const u128 temporal = Common::Multiply64Into128(ticks, CNTFREQ);
|
||||||
std::pair<u64, u64> result = Common::Divide128On64(temporal, BASE_CLOCK_RATE);
|
return Common::Divide128On32(temporal, static_cast<u32>(BASE_CLOCK_RATE)).first;
|
||||||
return result.first;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
} // namespace Core::Timing
|
} // namespace Core::Timing
|
||||||
|
Loading…
Reference in New Issue
Block a user