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implement bit-perfect vrsqrtefp

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This commit is contained in:
disjtqz
2023-09-30 14:59:56 -04:00
committed by Radosław Gliński
parent cfecdcbeab
commit 79465708aa
9 changed files with 540 additions and 28 deletions
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11
src/xenia/cpu/backend/x64/x64_seq_vector.cc
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@@ -3376,17 +3376,28 @@ struct SET_NJM_I8 : Sequence<SET_NJM_I8, I<OPCODE_SET_NJM, VoidOp, I8Op>> {
auto addr_vmx = e.GetBackendCtxPtr(offsetof(X64BackendContext, mxcsr_vmx));
addr_vmx.setBit(32);
auto flags_ptr = e.GetBackendFlagsPtr();
if (i.src1.is_constant) {
if (i.src1.constant() == 0) {
// turn off daz/flush2z
e.mov(addr_vmx, _MM_MASK_MASK);
e.btr(flags_ptr, kX64BackendNJMOn);
} else {
e.mov(addr_vmx, DEFAULT_VMX_MXCSR);
e.bts(flags_ptr, kX64BackendNJMOn);
}
} else {
e.mov(e.eax, flags_ptr);
e.mov(e.edx, 1U << kX64BackendNJMOn);
e.mov(e.ecx, e.edx);
e.not_(e.ecx);
e.and_(e.ecx, e.eax);
e.or_(e.edx, e.eax);
e.test(i.src1, i.src1);
e.cmove(e.edx, e.ecx);
e.mov(flags_ptr, e.edx);
e.mov(e.edx, DEFAULT_VMX_MXCSR);
e.mov(e.eax, _MM_MASK_MASK);