XORPD — Bitwise Logical XOR of Packed Double Precision Floating-Point Values

Instruction Operand Encoding ¶

Description ¶

Performs a bitwise logical XOR of the two, four or eight packed double precision floating-point values from the first source operand and the second source operand, and stores the result in the destination operand.

EVEX.512 encoded version: The first source operand is a ZMM register. The second source operand can be a ZMM register or a vector memory location. The destination operand is a ZMM register conditionally updated with write-mask k1.

VEX.256 and EVEX.256 encoded versions: The first source operand is a YMM register. The second source operand is a YMM register or a 256-bit memory location. The destination operand is a YMM register (conditionally updated with writemask k1 in case of EVEX). The upper bits (MAXVL-1:256) of the corresponding ZMM register destination are zeroed.

VEX.128 and EVEX.128 encoded versions: The first source operand is an XMM register. The second source operand is an XMM register or 128-bit memory location. The destination operand is an XMM register (conditionally updated with writemask k1 in case of EVEX). The upper bits (MAXVL-1:128) of the corresponding ZMM register destination are zeroed.

128-bit Legacy SSE version: The second source can be an XMM register or an 128-bit memory location. The destination is not distinct from the first source XMM register and the upper bits (MAXVL-1:128) of the corresponding register destination are unmodified.

Operation ¶

VXORPD (EVEX Encoded Versions) ¶

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j := 0 TO KL-1
    i := j * 64
    IF k1[j] OR *no writemask* THEN
            IF (EVEX.b == 1) AND (SRC2 *is memory*)
                THEN DEST[i+63:i] := SRC1[i+63:i] BITWISE XOR SRC2[63:0];
                ELSE DEST[i+63:i] := SRC1[i+63:i] BITWISE XOR SRC2[i+63:i];
            FI;
        ELSE
            IF *merging-masking* ; merging-masking
                THEN *DEST[i+63:i] remains unchanged*
                ELSE *zeroing-masking*
                        ; zeroing-masking
                    DEST[i+63:i] = 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:VL] := 0

VXORPD (VEX.256 Encoded Version) ¶

DEST[63:0] := SRC1[63:0] BITWISE XOR SRC2[63:0]
DEST[127:64] := SRC1[127:64] BITWISE XOR SRC2[127:64]
DEST[191:128] := SRC1[191:128] BITWISE XOR SRC2[191:128]
DEST[255:192] := SRC1[255:192] BITWISE XOR SRC2[255:192]
DEST[MAXVL-1:256] := 0

VXORPD (VEX.128 Encoded Version) ¶

DEST[63:0] := SRC1[63:0] BITWISE XOR SRC2[63:0]
DEST[127:64] := SRC1[127:64] BITWISE XOR SRC2[127:64]
DEST[MAXVL-1:128] := 0

XORPD (128-bit Legacy SSE Version) ¶

DEST[63:0] := DEST[63:0] BITWISE XOR SRC[63:0]
DEST[127:64] := DEST[127:64] BITWISE XOR SRC[127:64]
DEST[MAXVL-1:128] (Unmodified)

Intel C/C++ Compiler Intrinsic Equivalent ¶

VXORPD __m512d _mm512_xor_pd (__m512d a, __m512d b);

VXORPD __m512d _mm512_mask_xor_pd (__m512d a, __mmask8 m, __m512d b);

VXORPD __m512d _mm512_maskz_xor_pd (__mmask8 m, __m512d a);

VXORPD __m256d _mm256_xor_pd (__m256d a, __m256d b);

VXORPD __m256d _mm256_mask_xor_pd (__m256d a, __mmask8 m, __m256d b);

VXORPD __m256d _mm256_maskz_xor_pd (__mmask8 m, __m256d a);

XORPD __m128d _mm_xor_pd (__m128d a, __m128d b);

VXORPD __m128d _mm_mask_xor_pd (__m128d a, __mmask8 m, __m128d b);

VXORPD __m128d _mm_maskz_xor_pd (__mmask8 m, __m128d a);

SIMD Floating-Point Exceptions ¶

None.

Other Exceptions ¶

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

EVEX-encoded instructions, see Table 2-49, “Type E4 Class Exception Conditions.”