MOVAPS — Move Aligned Packed Single Precision Floating-Point Values

Instruction Operand Encoding ¶

Description ¶

Moves 4, 8 or 16 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, 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 locations, 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*
                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
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*
                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:

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