MOVUPS — Move Unaligned Packed Single Precision Floating-Point Values

Instruction Operand Encoding ¶

Description ¶

Note: VEX.vvvv and EVEX.vvvv is 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 memory. The destination operand is updated according to the writemask.

VEX.256 and EVEX.256 encoded versions:

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. Bits (MAXVL-1:256) of the destination register are zeroed.

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.

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

When the source or destination operand is a memory operand, the operand may be unaligned without causing a general-protection exception (#GP) to be generated.

VEX.128 and EVEX.128 encoded versions: Bits (MAXVL-1:128) of the destination register are zeroed.

Operation ¶

VMOVUPS (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

VMOVUPS (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;

VMOVUPS (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

VMOVUPS (VEX.256 Encoded Version, Load - and Register Copy) ¶

DEST[255:0] := SRC[255:0]
DEST[MAXVL-1:256] := 0

VMOVUPS (VEX.256 Encoded Version, Store-Form) ¶

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

VMOVUPS (VEX.128 Encoded Version) ¶

DEST[127:0] := SRC[127:0]
DEST[MAXVL-1:128] := 0

MOVUPS (128-bit Load- and Register-Copy- Form Legacy SSE Version) ¶

DEST[127:0] := SRC[127:0]
DEST[MAXVL-1:128] (Unmodified)

(V)MOVUPS (128-bit Store-Form Version) ¶

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

Intel C/C++ Compiler Intrinsic Equivalent ¶

VMOVUPS __m512 _mm512_loadu_ps( void * s);

VMOVUPS __m512 _mm512_mask_loadu_ps(__m512 a, __mmask16 k, void * s);

VMOVUPS __m512 _mm512_maskz_loadu_ps( __mmask16 k, void * s);

VMOVUPS void _mm512_storeu_ps( void * d, __m512 a);

VMOVUPS void _mm512_mask_storeu_ps( void * d, __mmask8 k, __m512 a);

VMOVUPS __m256 _mm256_mask_loadu_ps(__m256 a, __mmask8 k, void * s);

VMOVUPS __m256 _mm256_maskz_loadu_ps( __mmask8 k, void * s);

VMOVUPS void _mm256_mask_storeu_ps( void * d, __mmask8 k, __m256 a);

VMOVUPS __m128 _mm_mask_loadu_ps(__m128 a, __mmask8 k, void * s);

VMOVUPS __m128 _mm_maskz_loadu_ps( __mmask8 k, void * s);

VMOVUPS void _mm_mask_storeu_ps( void * d, __mmask8 k, __m128 a);

MOVUPS __m256 _mm256_loadu_ps ( float * p);

MOVUPS void _mm256 _storeu_ps( float *p, __m256 a);

MOVUPS __m128 _mm_loadu_ps ( float * p);

MOVUPS void _mm_storeu_ps( float *p, __m128 a);

SIMD Floating-Point Exceptions ¶

None.

Other Exceptions ¶

Non-EVEX-encoded instruction, see Table 2-21, “Type 4 Class Exception Conditions.”

Note treatment of #AC varies.

EVEX-encoded instruction, see Exceptions Type E4.nb in Table 2-49, “Type E4 Class Exception Conditions.”

Additionally: