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Emulate register-form SSE4a EXTRQ

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nmzik
2026-09-16 17:28:28 +04:00
parent 10cae50b34
commit 349fae00d9
2 changed files with 42 additions and 8 deletions
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tests/VirtualMemoryAllocationTests.cpp
+21
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@@ -2795,6 +2795,27 @@ void TestPackedReciprocalSquareRoot() {
emulate({0x66, 0x41, 0x0f, 0x78, 0xc0, 8, 4}, 7); // extrq xmm8, 8, 4
Check(test, fpstate._xmm[8].element[0] == 0x23 && fpstate._xmm[8].element[2] == 0,
"SSE4a extraction lost its extended register or upper-half semantics");
fpstate._xmm[1].element[0] = 0x1234;
fpstate._xmm[8].element[0] = 0xffffc4c8;
emulate({0x66, 0x41, 0x0f, 0x79, 0xc8}, 5); // observed fault: extrq xmm1, xmm8
Check(test, fpstate._xmm[1].element[0] == 0x23 && fpstate._xmm[8].element[0] == 0xffffc4c8,
"register EXTRQ lost its source controls, ignored bits, or separate destination");
fpstate._xmm[11].element[0] = 0x89abcdef;
fpstate._xmm[11].element[1] = 0x01234567;
fpstate._xmm[0].element[0] = 0x2010;
emulate({0x66, 0x44, 0x0f, 0x79, 0xd8}, 5); // extrq xmm11, xmm0
Check(test, fpstate._xmm[11].element[0] == 0x4567 && fpstate._xmm[11].element[1] == 0,
"register EXTRQ lost its extended destination or 64-bit extraction");
fpstate._xmm[8].element[0] = 0x89abcdef;
fpstate._xmm[8].element[1] = 0x01234567;
fpstate._xmm[9].element[0] = 0;
emulate({0x66, 0x45, 0x0f, 0x79, 0xc1}, 5); // extrq xmm8, xmm9
Check(test, fpstate._xmm[8].element[0] == 0x89abcdef && fpstate._xmm[8].element[1] == 0x01234567,
"register EXTRQ did not interpret zero length as 64 bits");
fpstate._xmm[3].element[0] = 0xab0408;
emulate({0x66, 0x0f, 0x79, 0xdb}, 4); // extrq xmm3, xmm3
Check(test, fpstate._xmm[3].element[0] == 0x40,
"register EXTRQ overwrote aliased controls before reading them");
fpstate._xmm[8].element[0] = 0x1111;
fpstate._xmm[8].element[2] = 0xdeadbeef;
fpstate._xmm[9].element[0] = 0xab;