image/svg+xml PDEP — Parallel Bits Deposit Instruction Operand Encoding Description PDEP uses a mask in the second source operand (the third operand) to transfer/scatter contiguous low order bits in the first source operand (the second operand) into the destination (the first operand). PDEP takes the low bits from the first source operand and deposit them in the destination operand at the corresponding bit locations that are set in the second source operand (mask). All other bits (bits not set in mask) in destination are set to zero. Figure 4-8. PDEP Example This instruction is not supported in real mode and virtual-8086 mode. The operand size is always 32 bits if not in 64-bit mode. In 64-bit mode operand size 64 requires VEX.W1. VEX.W1 is ignored in non-64-bit modes. An attempt to execute this instruction with VEX.L not equal to 0 will cause #UD. Operation TEMP := SRC1; MASK := SRC2; DEST := 0 ; m := 0, k := 0; DOWHILE m < OperandSize IF MASK[ m] = 1 THEN DEST[ m] := TEMP[ k]; k := k+ 1; FI m := m+ 1; OD Opcode/ Instruction Op/ En 64/32 -bit Mode CPUID Feature Flag Description VEX.LZ.F2.0F38.W0 F5 /r PDEP r32a, r32b, r/m32 RVMV/VBMI2Parallel deposit of bits from r32b using mask in r/m32 , result is writ- ten to r32a . VEX.LZ.F2.0F38.W1 F5 /r PDEP r64a, r64b, r/m64 RVMV/N.E.BMI2Parallel deposit of bits from r64b using mask in r/m64 , result is writ- ten to r64a. Op/EnOperand 1Operand 2Operand 3Operand 4 RVMModRM:reg (w)VEX.vvvv (r)ModRM:r/m (r)NA 0010010101000 000000000 DEST SRC1 SRC2 (mask) S 31 S 30 S 29 S 28 S 27 S 7 S 6 S 5 S 3 S 4 S 2 S 1 S 0 S 0 S 1 S 2 S 3 bit 0 bit 31 image/svg+xml Flags Affected None. Intel C/C++ Compiler Intrinsic Equivalent PDEP:unsigned __int32 _pdep_u32(unsigned __int32 src, unsigned __int32 mask); PDEP:unsigned __int64 _pdep_u64(unsigned __int64 src, unsigned __int32 mask) ; SIMD Floating-Point Exceptions None Other Exceptions See Table2-29, “Type 13 Class Exception Conditions”. This UNOFFICIAL reference was generated from the official Intel® 64 and IA-32 Architectures Software Developer’s Manual by a dumb script. There is no guarantee that some parts aren't mangled or broken and is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE .