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ASM code generator for "small" programs that fit into the uOP cache

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tevador
2019-01-24 19:29:59 +01:00
parent bd0dba88a8
commit d2cb086221
13 changed files with 1796 additions and 9915 deletions
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src/CompiledVirtualMachine.cpp
+26 -3
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@@ -25,6 +25,12 @@ along with RandomX. If not, see<http://www.gnu.org/licenses/>.
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;
}
@@ -37,25 +43,42 @@ namespace RandomX {
memcpy(scratchpad, mem.ds.dataset + ScratchpadSize * index, ScratchpadSize);
}
static uint64_t getSmallPositiveFloatBits(uint64_t entropy) {
auto exponent = entropy >> 60; //0..15
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();
}
FPINIT();
for (int i = 0; i < RegistersCount; ++i) {
/*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)) & ~7;
mem.mx = *(((uint32_t*)seed) + 5);
}
void CompiledVirtualMachine::execute() {
//executeProgram(reg, mem, scratchpad, readDataset);
executeProgram(reg, mem, scratchpad, InstructionCount);
totalSize += compiler.getCodeSize();
compiler.getProgramFunc()(reg, mem, scratchpad);
//compiler.getProgramFunc()(reg, mem, scratchpad);
#ifdef TRACEVM
for (int32_t i = InstructionCount - 1; i >= 0; --i) {
std::cout << std::hex << tracepad[i].u64 << std::endl;