PMULHW
MMX PENTIUMMMX x86_64
PMULHW is an instruction of the x86_64 architecture (x86 / x86-64 (covers 16/32/64-bit modes)), category MMX. This page lists its 4 encoding forms, distinguished by opcode bytes: 0F, E5.
Each form below links to its full decode: the operand roles and where each one is encoded in the instruction, the flag and register effects, and any micro-op sequence authored for it.
X86_PMULHW_X86_LEGACY_0F_E5_898451
xmm, xmm/m128
XED_PMULHW_X86_LEGACY_0F_E5_416865
REG0=MMX_R():rw:q:i16 REG1=MMX_B():r:q:i16
XED_PMULHW_X86_LEGACY_0F_E5_716310
REG0=MMX_R():rw:q:i16 MEM0:r:q:i16
XED_PMULHW_X86_LEGACY_0F_E5_846598
REG0=XMM_R():rw:dq:i16 MEM0:r:dq:i16 REG0=XMM_R():rw:dq:i16 REG1=XMM_B():r:dq:i16