MOVAPS—Move Aligned Packed Single-Precision Floating-Point Values

Opcode/Instruction Op/En 64/32 bit Mode Support CPUID Feature Flag Description
NP 0F 28 /r MOVAPS xmm1, xmm2/m128 A V/V SSE Move aligned packed single-precision floating-point values from xmm2/mem to xmm1.
NP 0F 29 /r MOVAPS xmm2/m128, xmm1 B V/V SSE Move aligned packed single-precision floating-point values from xmm1 to xmm2/mem.
VEX.128.0F.WIG 28 /r VMOVAPS xmm1, xmm2/m128 A V/V AVX Move aligned packed single-precision floating-point values from xmm2/mem to xmm1.
VEX.128.0F.WIG 29 /r VMOVAPS xmm2/m128, xmm1 B V/V AVX Move aligned packed single-precision floating-point values from xmm1 to xmm2/mem.
VEX.256.0F.WIG 28 /r VMOVAPS ymm1, ymm2/m256 A V/V AVX Move aligned packed single-precision floating-point values from ymm2/mem to ymm1.
VEX.256.0F.WIG 29 /r VMOVAPS ymm2/m256, ymm1 B V/V AVX Move aligned packed single-precision floating-point values from ymm1 to ymm2/mem.
EVEX.128.0F.W0 28 /r VMOVAPS xmm1 {k1}{z}, xmm2/m128 C V/V AVX512VL AVX512F Move aligned packed single-precision floating-point values from xmm2/m128 to xmm1 using writemask k1.
EVEX.256.0F.W0 28 /r VMOVAPS ymm1 {k1}{z}, ymm2/m256 C V/V AVX512VL AVX512F Move aligned packed single-precision floating-point values from ymm2/m256 to ymm1 using writemask k1.
EVEX.512.0F.W0 28 /r VMOVAPS zmm1 {k1}{z}, zmm2/m512 C V/V AVX512F Move aligned packed single-precision floating-point values from zmm2/m512 to zmm1 using writemask k1.
EVEX.128.0F.W0 29 /r VMOVAPS xmm2/m128 {k1}{z}, xmm1 D V/V AVX512VL AVX512F Move aligned packed single-precision floating-point values from xmm1 to xmm2/m128 using writemask k1.
EVEX.256.0F.W0 29 /r VMOVAPS ymm2/m256 {k1}{z}, ymm1 D V/V AVX512VL AVX512F Move aligned packed single-precision floating-point values from ymm1 to ymm2/m256 using writemask k1.
EVEX.512.0F.W0 29 /r VMOVAPS zmm2/m512 {k1}{z}, zmm1 D V/V AVX512F Move aligned packed single-precision floating-point values from zmm1 to zmm2/m512 using writemask k1.

Instruction Operand Encoding

Op/En Tuple Type Operand 1 Operand 2 Operand 3 Operand 4
A NA ModRM:reg (w) ModRM:r/m (r) NA NA
B NA ModRM:r/m (w) ModRM:reg (r) NA NA
C Full Mem ModRM:reg (w) ModRM:r/m (r) NA NA
D Full Mem ModRM:r/m (w) ModRM:reg (r) NA NA

Description

Moves 4, 8 or 16 single-precision floating-point values from the source operand (second operand) to the destina-tion operand (first operand). This instruction can be used to load an XMM, YMM or ZMM register from an 128-bit, 256-bit or 512-bit memory location, to store the contents of an XMM, YMM or ZMM register into a 128-bit, 256-bit or 512-bit memory location, or to move data between two XMM, two YMM or two ZMM registers.

When the source or destination operand is a memory operand, the operand must be aligned on a 16-byte (128-bit version), 32-byte (VEX.256 encoded version) or 64-byte (EVEX.512 encoded version) boundary or a general-protection exception (#GP) will be generated. For EVEX.512 encoded versions, the operand must be aligned to the size of the memory operand. To move single-precision floating-point values to and from unaligned memory loca-tions, use the VMOVUPS instruction.

Note: VEX.vvvv and EVEX.vvvv are reserved and must be 1111b otherwise instructions will #UD.

EVEX.512 encoded version:

Moves 512 bits of packed single-precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load a ZMM register from a 512-bit float32 memory location, to store the contents of a ZMM register into a float32 memory location, or to move data between two ZMM registers. When the source or destination operand is a memory operand, the operand must be aligned on a 64-byte boundary or a general-protection exception (#GP) will be generated. To move single-precision floating-point values to and from unaligned memory locations, use the VMOVUPS instruction.

VEX.256 and EVEX.256 encoded version:

Moves 256 bits of packed single-precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load a YMM register from a 256-bit memory location, to store the contents of a YMM register into a 256-bit memory location, or to move data between two YMM registers. When the source or destination operand is a memory operand, the operand must be aligned on a 32-byte boundary or a general-protection exception (#GP) will be generated.

128-bit versions:

Moves 128 bits of packed single-precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load an XMM register from a 128-bit memory location, to store the contents of an XMM register into a 128-bit memory location, or to move data between two XMM registers. When the source or destination operand is a memory operand, the operand must be aligned on a 16-byte boundary or a general-protection exception (#GP) will be generated. To move single-precision floating-point values to and from unaligned memory locations, use the VMOVUPS instruction.

128-bit Legacy SSE version: Bits (MAXVL-1:128) of the corresponding ZMM destination register remain unchanged.

(E)VEX.128 encoded version: Bits (MAXVL-1:128) of the destination ZMM register are zeroed.

Operation

VMOVAPS (EVEX encoded versions, register-copy form)

(KL, VL) = (4, 128), (8, 256), (16, 512)

FOR j := 0 TO KL-1

i := j * 32

IF k1[j] OR *no writemask*

THEN DEST[i+31:i] := SRC[i+31:i]

ELSE

IF *merging-masking*

; merging-masking

THEN *DEST[i+31:i] remains unchanged*

ELSE DEST[i+31:i] := 0

; zeroing-masking

FI

FI;

ENDFOR

DEST[MAXVL-1:VL] := 0

VMOVAPS (EVEX encoded versions, store-form)

(KL, VL) = (4, 128), (8, 256), (16, 512)

FOR j := 0 TO KL-1

i := j * 32

IF k1[j] OR *no writemask*

THEN DEST[i+31:i] :=

SRC[i+31:i]

ELSE *DEST[i+31:i] remains unchanged*

; merging-masking

FI;

ENDFOR;

VMOVAPS (EVEX encoded versions, load-form)

(KL, VL) = (4, 128), (8, 256), (16, 512)

FOR j := 0 TO KL-1

i := j * 32

IF k1[j] OR *no writemask*

THEN DEST[i+31:i] := SRC[i+31:i]

ELSE

IF *merging-masking*

; merging-masking

THEN *DEST[i+31:i] remains unchanged*

ELSE DEST[i+31:i] := 0

; zeroing-masking

FI

FI;

ENDFOR

DEST[MAXVL-1:VL] := 0

VMOVAPS (VEX.256 encoded version, load - and register copy)

DEST[255:0] := SRC[255:0]

DEST[MAXVL-1:256] := 0

VMOVAPS (VEX.256 encoded version, store-form)

DEST[255:0] := SRC[255:0]

VMOVAPS (VEX.128 encoded version, load - and register copy)

DEST[127:0] := SRC[127:0]

DEST[MAXVL-1:128] := 0

MOVAPS (128-bit load- and register-copy- form Legacy SSE version)

DEST[127:0] := SRC[127:0]

DEST[MAXVL-1:128] (Unmodified)

(V)MOVAPS (128-bit store-form version)

DEST[127:0] := SRC[127:0]

Intel C/C++ Compiler Intrinsic Equivalent

VMOVAPS __m512 _mm512_load_ps( void * m);

VMOVAPS __m512 _mm512_mask_load_ps(__m512 s, __mmask16 k, void * m);

VMOVAPS __m512 _mm512_maskz_load_ps( __mmask16 k, void * m);

VMOVAPS void _mm512_store_ps( void * d, __m512 a);

VMOVAPS void _mm512_mask_store_ps( void * d, __mmask16 k, __m512 a);

VMOVAPS __m256 _mm256_mask_load_ps(__m256 a, __mmask8 k, void * s);

VMOVAPS __m256 _mm256_maskz_load_ps( __mmask8 k, void * s);

VMOVAPS void _mm256_mask_store_ps( void * d, __mmask8 k, __m256 a);

VMOVAPS __m128 _mm_mask_load_ps(__m128 a, __mmask8 k, void * s);

VMOVAPS __m128 _mm_maskz_load_ps( __mmask8 k, void * s);

VMOVAPS void _mm_mask_store_ps( void * d, __mmask8 k, __m128 a);

MOVAPS __m256 _mm256_load_ps (float * p);

MOVAPS void _mm256_store_ps(float * p, __m256 a);

MOVAPS __m128 _mm_load_ps (float * p);

MOVAPS void _mm_store_ps(float * p, __m128 a);

SIMD Floating-Point Exceptions

None

Other Exceptions

Non-EVEX-encoded instruction, see Exceptions Type1.SSE in Table 2-18, “Type 1 Class Exception Conditions”; additionally:

#UD

If VEX.vvvv != 1111B.

EVEX-encoded instruction, see Table 2-44, “Type E1 Class Exception Conditions”.