search for: xmm16

...C to clang. These flags will be used to limit the vector register size presented by TTI to the vectorizers. The backend will still be able to use wider registers for code written using the instrinsics in x86intrin.h. And the backend will still be able to use AVX512VL instructions and the additional XMM16-31 and YMM16-31 registers. Motivation: -Using 512-bit operations on some Intel CPUs may cause a decrease in CPU frequency that may offset the gains from using the wider register size. See section 15.26 of Intel® 64 and IA-32 Architectures Optimization Reference Manual published October 2017. -...

...s an RFC for a proposed target specific X86 optimization for reducing code size in the encoding of AVX-512 instructions when possible. When the AVX512F instruction set was introduced in X86 it included additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31. In order to encode the new registers of 16-31 and the additional instructions, a new encoding prefix called EVEX, which extends the existing VEX encoding, was introduced as shown below: The EVEX encoding format: EVEX Opcode ModR/M [SIB] [Disp32]...

...> used to limit the vector register size presented by TTI to the vectorizers. >> The backend will still be able to use wider registers for code written >> using the instrinsics in x86intrin.h. And the backend will still be able to >> use AVX512VL instructions and the additional XMM16-31 and YMM16-31 >> registers. >> >> >> >> Motivation: >> >> -Using 512-bit operations on some Intel CPUs may cause a decrease in CPU >> frequency that may offset the gains from using the wider register size. See >> section 15.26 of Intel® 64 and...

...cific X86 optimization for > reducing code size in the encoding of AVX-512 instructions when possible. > > > > When the AVX512F instruction set was introduced in X86 it included > additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as > additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31. > > In order to encode the new registers of 16-31 and the additional > instructions, a new encoding prefix called EVEX, which extends the > existing VEX encoding, was introduced as shown below: > > > > The EVEX encoding format: > &g...

...or register size presented by TTI to the vectorizers. > >>> The backend will still be able to use wider registers for code written > >>> using the instrinsics in x86intrin.h. And the backend will still be able to > >>> use AVX512VL instructions and the additional XMM16-31 and YMM16-31 > >>> registers. > >>> > >>> > >>> > >>> Motivation: > >>> > >>> -Using 512-bit operations on some Intel CPUs may cause a decrease in CPU > >>> frequency that may offset the gains from us...

...s an RFC for a proposed target specific X86 optimization for reducing code size in the encoding of AVX-512 instructions when possible. When the AVX512F instruction set was introduced in X86 it included additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31. In order to encode the new registers of 16-31 and the additional instructions, a new encoding prefix called EVEX, which extends the existing VEX encoding, was introduced as shown below: The EVEX encoding format: EVEX Opcode ModR/M [SIB] [Disp32]...

...orizers. >> > >>> The backend will still be able to use wider registers for code >> written >> > >>> using the instrinsics in x86intrin.h. And the backend will still be >> able to >> > >>> use AVX512VL instructions and the additional XMM16-31 and YMM16-31 >> > >>> registers. >> > >>> >> > >>> >> > >>> >> > >>> Motivation: >> > >>> >> > >>> -Using 512-bit operations on some Intel CPUs may cause a decrease >&...

...s an RFC for a proposed target specific X86 optimization for reducing code size in the encoding of AVX-512 instructions when possible. When the AVX512F instruction set was introduced in X86 it included additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31. In order to encode the new registers of 16-31 and the additional instructions, a new encoding prefix called EVEX, which extends the existing VEX encoding, was introduced as shown below: The EVEX encoding format: EVEX Opcode ModR/M [SIB] [Disp32]...

...gt; The backend will still be able to use wider registers for code >>>> written >>>> > >>> using the instrinsics in x86intrin.h. And the backend will still >>>> be able to >>>> > >>> use AVX512VL instructions and the additional XMM16-31 and YMM16-31 >>>> > >>> registers. >>>> > >>> >>>> > >>> >>>> > >>> >>>> > >>> Motivation: >>>> > >>> >>>> > >>> -Using 512-bit...

...le to use wider registers for code >>>>>> written >>>>>> > >>> using the instrinsics in x86intrin.h. And the backend will >>>>>> still be able to >>>>>> > >>> use AVX512VL instructions and the additional XMM16-31 and >>>>>> YMM16-31 >>>>>> > >>> registers. >>>>>> > >>> >>>>>> > >>> >>>>>> > >>> >>>>>> > >>> Motivation: >>>>>...

...registers for code >>>>>>> written >>>>>>> > >>> using the instrinsics in x86intrin.h. And the backend will >>>>>>> still be able to >>>>>>> > >>> use AVX512VL instructions and the additional XMM16-31 and >>>>>>> YMM16-31 >>>>>>> > >>> registers. >>>>>>> > >>> >>>>>>> > >>> >>>>>>> > >>> >>>>>>> > >>> Motivati...

...ng the instrinsics in >> x86intrin.h. And the backend will >> still be able to >> > >>> use AVX512VL instructions and >> the additional XMM16-31 and YMM16-31 >> > >>> registers. >> > >>> >> > >>> >> > >>> >>...

...t;> code written >>>>>>>>>> > >>> using the instrinsics in x86intrin.h. And the backend will >>>>>>>>>> still be able to >>>>>>>>>> > >>> use AVX512VL instructions and the additional XMM16-31 and >>>>>>>>>> YMM16-31 >>>>>>>>>> > >>> registers. >>>>>>>>>> > >>> >>>>>>>>>> > >>> >>>>>>>>>> > >>...