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Source code

MULPD

Multiply Packed Double Precision Floating-Point Values

stableVMJITAOTinstruction

Encodings

OpcodeInstructionOp/En64-bitCompat/LegacyDescription
66 0F 59 /rMULPD xmm1, xmm2/m128AValidValidMultiply packed double precision floating-point values in xmm2/m128 with xmm1 and store result in xmm1.
VEX.128.66.0F.WIG 59 /rVMULPD xmm1,xmm2, xmm3/m128BValidValidMultiply packed double precision floating-point values in xmm3/m128 with xmm2 and store result in xmm1.
VEX.256.66.0F.WIG 59 /rVMULPD ymm1, ymm2, ymm3/m256BValidValidMultiply packed double precision floating-point values in ymm3/m256 with ymm2 and store result in ymm1.
EVEX.128.66.0F.W1 59 /rVMULPD xmm1 {k1}{z}, xmm2, xmm3/m128/m64bcstCValidValidMultiply packed double precision floating-point AVX512F) OR values from xmm3/m128/m64bcst to xmm2 and AVX10.1 store result in xmm1.
EVEX.256.66.0F.W1 59 /rVMULPD ymm1 {k1}{z}, ymm2, ymm3/m256/m64bcstCValidValidMultiply packed double precision floating-point AVX512F) OR values from ymm3/m256/m64bcst to ymm2 and AVX10.1 store result in ymm1.
EVEX.512.66.0F.W1 59 /rVMULPD zmm1 {k1}{z}, zmm2, zmm3/m512/m64bcst{er}CValidValidMultiply packed double precision floating-point OR AVX10.1 values in zmm3/m512/m64bcst with zmm2 and store result in zmm1.

Operand encoding

Each mode is a value of the Op/En column above. It says which field of the encoded instruction carries each operand, in the order they are written, and whether the instruction reads it, writes it or both.

A

  1. modrm.reg lectura y escrituraModRM byte, reg field (bits 5-3)
  2. modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

B

  1. modrm.reg escrituraModRM byte, reg field (bits 5-3)
  2. vex.vvvv lecturaVEX prefix, vvvv field (inverted)
  3. modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

C

  1. modrm.reg escrituraModRM byte, reg field (bits 5-3)
  2. evex.vvvv lecturaEVEX prefix, vvvv field (inverted)
  3. modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

Tupla: Full

Measured cost

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Description

Multiply packed double precision floating-point values from the first source operand with corresponding values in the second source operand, and stores the packed double precision floating-point results in the destination operand.

EVEX encoded versions: The first source operand (the second operand) is a ZMM/YMM/XMM register. The second source operand can be a ZMM/YMM/XMM register, a 512/256/128-bit memory location or a 512/256/128-bit vector broadcasted from a 64-bit memory location. The destination operand is a ZMM/YMM/XMM register conditionally updated with writemask k1.

VEX.256 encoded version: The first source operand is a YMM register. The second source operand can be a YMM register or a 256-bit memory location. The destination operand is a YMM register. Bits (MAXVL-1:256) of the corresponding destination ZMM register are zeroed.

VEX.128 encoded version: The first source operand is a XMM register. The second source operand can be a XMM register or a 128-bit memory location. The destination operand is a XMM register. The upper bits (MAXVL-1:128) of the destination YMM 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 ZMM register destination are unmodified.

Operation

VMULPD (EVEX Encoded Versions)

(KL, VL) = (2, 128), (4, 256), (8, 512)

IF (VL = 512) AND (EVEX.b = 1) AND SRC2 *is a register*

     THEN

          SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);

     ELSE

          SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);

FI;

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] * SRC2[63:0]

                       ELSE

                       DEST[i+63:i] := SRC1[i+63:i] * SRC2[i+63:i]

                  FI;

          ELSE

                  IF *merging-masking*      ; merging-masking

                       THEN *DEST[i+63:i] remains unchanged*

                       ELSE                 ; zeroing-masking

                       DEST[i+63:i] := 0

                  FI

     FI;

ENDFOR

DEST[MAXVL-1:VL] := 0

VMULPD (VEX.256 Encoded Version)
DEST[63:0] := SRC1[63:0] * SRC2[63:0]
DEST[127:64] := SRC1[127:64] * SRC2[127:64]
DEST[191:128] := SRC1[191:128] * SRC2[191:128]
DEST[255:192] := SRC1[255:192] * SRC2[255:192]
DEST[MAXVL-1:256] := 0;
.
VMULPD (VEX.128 Encoded Version)
DEST[63:0] := SRC1[63:0] * SRC2[63:0]
DEST[127:64] := SRC1[127:64] * SRC2[127:64]
DEST[MAXVL-1:128] := 0

MULPD (128-bit Legacy SSE Version)
DEST[63:0] := DEST[63:0] * SRC[63:0]
DEST[127:64] := DEST[127:64] * SRC[127:64]
DEST[MAXVL-1:128] (Unmodified)

Intel C/C++ compiler intrinsics

VMULPD __m512d _mm512_mul_pd( __m512d a, __m512d b);
VMULPD __m512d _mm512_mask_mul_pd(__m512d s, __mmask8 k, __m512d a, __m512d b);
VMULPD __m512d _mm512_maskz_mul_pd( __mmask8 k, __m512d a, __m512d b);
VMULPD __m512d _mm512_mul_round_pd( __m512d a, __m512d b, int);
VMULPD __m512d _mm512_mask_mul_round_pd(__m512d s, __mmask8 k, __m512d a, __m512d b, int);
VMULPD __m512d _mm512_maskz_mul_round_pd( __mmask8 k, __m512d a, __m512d b, int);
VMULPD __m256d _mm256_mul_pd (__m256d a, __m256d b);
MULPD __m128d _mm_mul_pd (__m128d a, __m128d b);

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Precision, Denormal.

Other Exceptions

Non-EVEX-encoded instruction, see Table 2-19, "Type 2 Class Exception Conditions." EVEX-encoded instruction, see Table 2-48, "Type E2 Class Exception Conditions."

Sources