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Instruction set architecture extension for microprocessors
The EVEX prefix (enhanced vector extension) and corresponding coding scheme is an extension to the 32-bit x86 (IA-32) and 64-bit x86-64 (AMD64) instruction
EVEX_prefix
Topics referred to by the same term
Evex may refer to: Esterified estrogens, by brand name EVEX prefix This disambiguation page lists articles associated with the title Evex. If an internal
Evex
Instruction set architecture extension for microprocessors
Performance Extensions (APX) which extended the EVEX prefix and introduced the REX2 prefix. REX prefix EVEX prefix Kelly, John Harry (May 2020). "AVX -> SSE
VEX_prefix
Instructions for the x86 microprocessors
shipped in 2013. AVX-512 expands AVX to 512-bit support using a new EVEX prefix encoding proposed by Intel in July 2013 and first supported by Intel
Advanced_Vector_Extensions
Instruction set architecture extension for microprocessors
Advanced Performance Extensions (APX), introducing the REX2 prefix. VEX prefix EVEX prefix Intel Corporation (January 2009). "Intel Advanced Vector Extensions
REX_prefix
without the leading V is used for legacy MMX/SSE encodings without VEX/EVEX-prefix. EMMS will also set the x87 top-of-stack to 0. Unlike the older FNINIT
List_of_x86_SIMD_instructions
Instruction set extension by Intel
to add to AVX-512. This has led them to define a new prefix called EVEX. Compared to VEX, EVEX adds the following benefits: Expanded register encoding
AVX-512
Instruction encoding rule for the x86 instruction set
in the ModR/M byte of an AVX-512 or AVX10 instruction encoded with an EVEX prefix, the displacement encoded in the instruction's disp8 byte will be scaled
ModR/M
none of the SHA-NI/SHA512/SM3 instructions can be encoded with the EVEX prefix - this prevents the use of the r16-r31 and xmm16-xmm31 registers with
List of x86 cryptographic instructions
List_of_x86_cryptographic_instructions
Family of instruction set architectures
2-byte REX2 prefix, while new instructions and extended operands for existing AVX/AVX2/AVX-512 instructions are encoded with an extended EVEX prefix which has
X86
List of x86 microprocessor instructions
opcode (62) is repurposed for the EVEX prefix. On some processors, including some 80186 variants, using repeat-prefixes with the BOUND instruction will
List_of_x86_instructions
floating-point arithmetic instructions that all follow a given pattern where: EVEX.W is used to specify floating-point format (0=FP32, 1=FP64) The bottom opcode
List of discontinued x86 instructions
List_of_discontinued_x86_instructions
Instruction for x86 microprocessors
TILECFG register. Also note that a 32-tile implementation must implement EVEX-encoded variants of AMX instructions, so that registers TMM16...TMM31 can
CPUID
X86 assembler
AVX-512: VCMPxxPD, VCMPxxPS, VCMPxxSD, VCMPxxPD, VCMPxxSS, AVX-512F set, EVEX-encoded instructions added in 2.13; VMOVQ added 2.13, to supplement MOVD
Open_Watcom_Assembler
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