Intel® Architecture Instruction Set Extensions Programming Reference

VBROADCASTF128/I128 — Broadcast 128-Bit Data
Opcode/
Instruction
Description
Instruction Operand Encoding
INSTRUCTION SET REFERENCE
VBROADCASTF128 and VBROADCASTI128 load 128-bit data from the source operand (second operand) and
broadcast to the destination operand (first operand).
The destination operand is a YMM register. The source operand is 128-bit memory location. Register source encodings
for VBROADCASTF128 and VBROADCASTI128 are reserved and will #UD.
VBROADCASTF128 and VBROADCASTI128 are only supported as 256-bit wide versions.
Note: In VEX-encoded versions, VEX.vvvv is reserved and must be 1111b otherwise instructions will #UD.
Attempts to execute any VPBROADCAST* instruction with VEX.W = 1 will cause #UD.
An attempt to execute VBROADCASTF128 or VBROADCASTI128 encoded with VEX.L= 0 will cause an #UD exception.
Operation
Op/
En
VBROADCASTF128/VBROADCASTI128
temp SRC[127:0]
DEST[127:0] temp
DEST[255:128] temp
64/32
-bit
Mode
CPUID
Feature
Flag
Description
VEX.256.66.0F38.W0 1A /r A V/V AVX Broadcast 128 bits of floating-point data in mem to low and high 128bits
in ymm1.
VBROADCASTF128 ymm1,
m128
VEX.256.66.0F38.W0 5A /r A V/V AVX2 Broadcast 128 bits of integer data in mem to low and high 128-bits in
ymm1.
VBROADCASTI128 ymm1,
m128
Op/En Operand 1 Operand 2 Operand 3 Operand 4
A ModRM:reg (w) ModRM:r/m (r) NA NA
DEST
X0
m128i X0
Figure 5-8. VBROADCASTI128 Operation
Ref. # 319433-014 5-177
X0