VPMADD52LUQ—Packed Multiply of Unsigned 52-bit Integers and Add the Low 52-bit Products to Qword Accumulators

Opcode/

Instruction

Op/En

32/64

bit Mode

Support

CPUID Description
EVEX.128.66.0F38.W1 B4 /r VPMADD52LUQ xmm1 {k1}{z}, xmm2,xmm3/m128/m64bcst A V/V AVX512_IFMA AVX512VL Multiply unsigned 52-bit integers in xmm2 and xmm3/m128 and add the low 52 bits of the 104-bit product to the qword unsigned integers in xmm1 using writemask k1.
EVEX.256.66.0F38.W1 B4 /r VPMADD52LUQ ymm1 {k1}{z}, ymm2, ymm3/m256/m64bcst A V/V AVX512_IFMA AVX512VL Multiply unsigned 52-bit integers in ymm2 and ymm3/m256 and add the low 52 bits of the 104-bit product to the qword unsigned integers in ymm1 using writemask k1.
EVEX.512.66.0F38.W1 B4 /r VPMADD52LUQ zmm1 {k1}{z}, zmm2,zmm3/m512/m64bcst A V/V AVX512_IFMA Multiply unsigned 52-bit integers in zmm2 and zmm3/m512 and add the low 52 bits of the 104-bit product to the qword unsigned integers in zmm1 using writemask k1.

Instruction Operand Encoding

Op/En Tuple Type Operand 1 Operand 2 Operand 3 Operand 4
A Full ModRM:reg (r, w) EVEX.vvvv (r) ModRM:r/m(r) NA

Description

Multiplies packed unsigned 52-bit integers in each qword element of the first source operand (the second oper-and) with the packed unsigned 52-bit integers in the corresponding elements of the second source operand (the third operand) to form packed 104-bit intermediate results. The low 52-bit, unsigned integer of each 104-bit product is added to the corresponding qword unsigned integer of the destination operand (the first operand) under the writemask k1.

The first source operand is a ZMM/YMM/XMM register. The second source operand can be a ZMM/YMM/XMM reg-ister, a 512/256/128-bit memory location or a 512/256/128-bit vector broadcasted from a 64-bit memory loca-tion. The destination operand is a ZMM/YMM/XMM register conditionally updated with writemask k1 at 64-bit granularity.

Operation

VPMADD52LUQ (EVEX encoded)

(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 src2 is Memory AND EVEX.b=1 THEN

tsrc2[63:0] := ZeroExtend64(src2[51:0]);

ELSE

tsrc2[63:0] := ZeroExtend64(src2[i+51:i];

FI;

Temp128[127:0] := ZeroExtend64(src1[i+51:i]) * tsrc2[63:0];

Temp2[63:0] := DEST[i+63:i] + ZeroExtend64(temp128[51:0]) ;

DEST[i+63:i] := Temp2[63:0];

ELSE

IF *zeroing-masking* THEN

DEST[i+63:i] := 0;

ELSE *merge-masking*

DEST[i+63:i] is unchanged;

FI;

FI;

ENDFOR

DEST[MAX_VL-1:VL] := 0;

Intel C/C++ Compiler Intrinsic Equivalent

VPMADD52LUQ __m512i _mm512_madd52lo_epu64( __m512i a, __m512i b, __m512i c);

VPMADD52LUQ __m512i _mm512_mask_madd52lo_epu64(__m512i s, __mmask8 k, __m512i a, __m512i b, __m512i c);

VPMADD52LUQ __m512i _mm512_maskz_madd52lo_epu64( __mmask8 k, __m512i a, __m512i b, __m512i c);

VPMADD52LUQ __m256i _mm256_madd52lo_epu64( __m256i a, __m256i b, __m256i c);

VPMADD52LUQ __m256i _mm256_mask_madd52lo_epu64(__m256i s, __mmask8 k, __m256i a, __m256i b, __m256i c);

VPMADD52LUQ __m256i _mm256_maskz_madd52lo_epu64( __mmask8 k, __m256i a, __m256i b, __m256i c);

VPMADD52LUQ __m128i _mm_madd52lo_epu64( __m128i a, __m128i b, __m128i c);

VPMADD52LUQ __m128i _mm_mask_madd52lo_epu64(__m128i s, __mmask8 k, __m128i a, __m128i b, __m128i c);

VPMADD52LUQ __m128i _mm_maskz_madd52lo_epu64( __mmask8 k, __m128i a, __m128i b, __m128i c);

Flags Affected

None.

SIMD Floating-Point Exceptions

None

Other Exceptions

See Table 2-49, “Type E4 Class Exception Conditions”.