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Interpreter with bytecode

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Fixed some undefined behavior with signed types
Fixed different results on big endian systems
Removed unused code files
Restored FNEG_R instructions
Updated documentation
This commit is contained in:
tevador
2019-02-09 15:45:26 +01:00
parent a586751f6b
commit 32d827d0a6
41 changed files with 1517 additions and 3621 deletions
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src/CompiledVirtualMachine.cpp
+3 -41
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@@ -18,19 +18,12 @@ along with RandomX. If not, see<http://www.gnu.org/licenses/>.
*/
#include "CompiledVirtualMachine.hpp"
#include "Pcg32.hpp"
#include "common.hpp"
#include "instructions.hpp"
#include <stdexcept>
namespace RandomX {
constexpr int mantissaSize = 52;
constexpr int exponentSize = 11;
constexpr uint64_t mantissaMask = (1ULL << mantissaSize) - 1;
constexpr uint64_t exponentMask = (1ULL << exponentSize) - 1;
constexpr int exponentBias = 1023;
CompiledVirtualMachine::CompiledVirtualMachine() {
totalSize = 0;
}
@@ -39,40 +32,9 @@ namespace RandomX {
mem.ds = ds;
}
void CompiledVirtualMachine::initializeScratchpad(uint8_t* scratchpad, int32_t index) {
memcpy(scratchpad, mem.ds.dataset + ScratchpadSize * index, ScratchpadSize);
}
static uint64_t getSmallPositiveFloatBits(uint64_t entropy) {
auto exponent = entropy >> 59; //0..31
auto mantissa = entropy & mantissaMask;
exponent += exponentBias;
exponent &= exponentMask;
exponent <<= mantissaSize;
return exponent | mantissa;
}
void CompiledVirtualMachine::initializeProgram(const void* seed) {
Pcg32 gen(seed);
for (unsigned i = 0; i < sizeof(reg) / sizeof(Pcg32::result_type); ++i) {
*(((uint32_t*)&reg) + i) = gen();
}
initFpu();
/*for (int i = 0; i < RegistersCount / 2; ++i) {
reg.f[i].lo.f64 = (double)reg.f[i].lo.i64;
reg.f[i].hi.f64 = (double)reg.f[i].hi.i64;
}
for (int i = 0; i < RegistersCount / 2; ++i) {
reg.g[i].lo.f64 = std::abs((double)reg.g[i].lo.i64);
reg.g[i].hi.f64 = std::abs((double)reg.g[i].hi.i64);
}*/
for (int i = 0; i < RegistersCount / 2; ++i) {
reg.a[i].lo.u64 = getSmallPositiveFloatBits(reg.f[i].lo.u64);
reg.a[i].hi.u64 = getSmallPositiveFloatBits(reg.f[i].hi.u64);
}
compiler.generateProgram(gen);
mem.ma = (gen() ^ *(((uint32_t*)seed) + 4)) & -64;
mem.mx = *(((uint32_t*)seed) + 5);
void CompiledVirtualMachine::initialize() {
VirtualMachine::initialize();
compiler.generateProgram(program);
}
void CompiledVirtualMachine::execute() {