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loader: add INSERTQ RDPID and CLWB fallbacks

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Co-authored-by: nomolao2-cell <nomolao2@gmail.com>
This commit is contained in:
nmzik
2026-10-03 20:13:58 +04:00
parent a4d26cf81a
commit 19a9464b7d
6 changed files with 667 additions and 107 deletions
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tests/macosSse4aTests.cpp
+42
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@@ -8,6 +8,7 @@
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <initializer_list>
#include <sys/mman.h>
#include <sys/ucontext.h>
#include <unistd.h>
@@ -61,6 +62,21 @@ constexpr uint8_t kInsertqXmm10Xmm9Len16Index8[] = {
0xc3, // ret
};
constexpr uint8_t kInsertqXmm10Xmm9[] = {
0xf3, 0x44, 0x0f, 0x6f, 0x0e, // movdqu (%rsi), %xmm9
0xf3, 0x44, 0x0f, 0x6f, 0x12, // movdqu (%rdx), %xmm10
0xf2, 0x45, 0x0f, 0x79, 0xd1, // insertq xmm10, xmm9
0xf3, 0x44, 0x0f, 0x7f, 0x17, // movdqu %xmm10, (%rdi)
0xc3,
};
constexpr uint8_t kInsertqXmm9Xmm9[] = {
0xf3, 0x44, 0x0f, 0x6f, 0x0e, // movdqu (%rsi), %xmm9
0xf2, 0x45, 0x0f, 0x79, 0xc9, // insertq xmm9, xmm9
0xf3, 0x44, 0x0f, 0x7f, 0x0f, // movdqu %xmm9, (%rdi)
0xc3,
};
constexpr uint8_t kUd2[] = {
0x0f, 0x0b, // ud2
0xc3, // ret
@@ -192,6 +208,31 @@ void TestRexHighRegisterInsertqWithIndex() {
Check(out[1] == 0xbbbbbbbbbbbbbbbbull, "insertq xmm10, xmm9, 16, 8 leaves the upper 64 bits untouched");
}
void TestInsertqRegister() {
const auto separate = MapCode<PairBlobFn>(kInsertqXmm10Xmm9);
const auto aliased = MapCode<PairBlobFn>(kInsertqXmm9Xmm9);
for (const auto fn: {separate, aliased}) {
for (const uint64_t controls: {0xc4c8ull, 0xc0c0ull, 0xffc1ull}) {
const uint64_t source[2] {0x0123456789abcdefull, 0xdeadbeef00000000ull | controls};
const uint64_t destination[2] {0x8877665544332211ull, 0xfedcba9876543210ull};
const auto* initial = fn == aliased ? source : destination;
uint64_t expected = initial[0];
const auto length = (controls & 63) == 0 ? 64 : controls & 63;
const auto index = (controls >> 8) & 63;
for (uint64_t bit = 0; bit < length && index + bit < 64; ++bit) {
const uint64_t mask = uint64_t {1} << (index + bit);
expected = (expected & ~mask) | (((source[0] >> bit) & 1) << (index + bit));
}
uint64_t out[2] {};
const int before = IllegalHits();
fn(out, source, destination);
Check(IllegalHits() == before + 1, "register INSERTQ raises one SIGILL");
Check(out[0] == expected && out[1] == initial[1],
"register INSERTQ uses upper source controls and preserves upper destination");
}
}
}
void TestUnknownInstructionRefused() {
g_refused.store(false, std::memory_order_relaxed);
g_refuse_skip.store(2, std::memory_order_relaxed);
@@ -213,6 +254,7 @@ int main() {
TestInsertqImmediate();
TestRexHighRegisterExtrq();
TestRexHighRegisterInsertqWithIndex();
TestInsertqRegister();
TestUnknownInstructionRefused();
std::printf("macosSse4aTests: all passed\n");
return 0;