AVX_ALL-General Support-YMM

AVX_ALL-General Support-YMM#

_mm256_zeroall#

Tech:

AVX_ALL

Category:

General Support

Header:

immintrin.h

Searchable:

AVX_ALL-General Support-YMM

Register:

YMM 256 bit

Return Type:

void

void _mm256_zeroall(void );

Intel Description

Zero the contents of all XMM or YMM registers.

Intel Implementation Psudeo-Code

YMM0[MAX:0] := 0
YMM1[MAX:0] := 0
YMM2[MAX:0] := 0
YMM3[MAX:0] := 0
YMM4[MAX:0] := 0
YMM5[MAX:0] := 0
YMM6[MAX:0] := 0
YMM7[MAX:0] := 0
IF _64_BIT_MODE
        YMM8[MAX:0] := 0
        YMM9[MAX:0] := 0
        YMM10[MAX:0] := 0
        YMM11[MAX:0] := 0
        YMM12[MAX:0] := 0
        YMM13[MAX:0] := 0
        YMM14[MAX:0] := 0
        YMM15[MAX:0] := 0
FI

_mm256_zeroupper#

Tech:

AVX_ALL

Category:

General Support

Header:

immintrin.h

Searchable:

AVX_ALL-General Support-YMM

Register:

YMM 256 bit

Return Type:

void

void _mm256_zeroupper(void );

Intel Description

Zero the upper 128 bits of all YMM registers; the lower 128-bits of the registers are unmodified.

Intel Implementation Psudeo-Code

YMM0[MAX:128] := 0
YMM1[MAX:128] := 0
YMM2[MAX:128] := 0
YMM3[MAX:128] := 0
YMM4[MAX:128] := 0
YMM5[MAX:128] := 0
YMM6[MAX:128] := 0
YMM7[MAX:128] := 0
IF _64_BIT_MODE
        YMM8[MAX:128] := 0
        YMM9[MAX:128] := 0
        YMM10[MAX:128] := 0
        YMM11[MAX:128] := 0
        YMM12[MAX:128] := 0
        YMM13[MAX:128] := 0
        YMM14[MAX:128] := 0
        YMM15[MAX:128] := 0
FI

_mm256_undefined_ps#

Tech:

AVX_ALL

Category:

General Support

Header:

immintrin.h

Searchable:

AVX_ALL-General Support-YMM

Register:

YMM 256 bit

Return Type:

__m256

__m256 _mm256_undefined_ps(void );

Intel Description

Return vector of type __m256 with undefined elements.

_mm256_undefined_pd#

Tech:

AVX_ALL

Category:

General Support

Header:

immintrin.h

Searchable:

AVX_ALL-General Support-YMM

Register:

YMM 256 bit

Return Type:

__m256d

__m256d _mm256_undefined_pd(void );

Intel Description

Return vector of type __m256d with undefined elements.

_mm256_undefined_si256#

Tech:

AVX_ALL

Category:

General Support

Header:

immintrin.h

Searchable:

AVX_ALL-General Support-YMM

Register:

YMM 256 bit

Return Type:

__m256i

__m256i _mm256_undefined_si256(void );

Intel Description

Return vector of type __m256i with undefined elements.

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