Re: [Xen-devel] [PATCH v8 21/50] x86emul: support AVX512F legacy-equivalent scalar int/FP conversion insns

2019-05-21 Thread Andrew Cooper
On 15/03/2019 10:52, Jan Beulich wrote: > VCVT{,T}S{S,D}2SI use EVEX.W for their destination (register) rather > than their (possibly memory) source operand size and hence need a > "manual" override of disp8scale. > > While the SDM claims that EVEX.L'L needs to be zero for the 32-bit forms > of

[Xen-devel] [PATCH v8 21/50] x86emul: support AVX512F legacy-equivalent scalar int/FP conversion insns

2019-03-15 Thread Jan Beulich
VCVT{,T}S{S,D}2SI use EVEX.W for their destination (register) rather than their (possibly memory) source operand size and hence need a "manual" override of disp8scale. While the SDM claims that EVEX.L'L needs to be zero for the 32-bit forms of VCVT{,U}SI2SD (exception type E10NF), observations on