Intel® Architecture Instruction Set Extensions Programming Reference

VBROADCAST — Broadcast Floating-Point Data
Opcode/
Instruction
Description
Instruction Operand Encoding
INSTRUCTION SET REFERENCE
Take the low floating-point data element from the source operand (second operand) and broadcast to all elements
of the destination operand (first operand).
The destination operand is a YMM register. The source operand is an XMM register, only the low 32-bit or 64-bit
data element is used.
Note: In VEX-encoded versions, VEX.vvvv is reserved and must be 1111b otherwise instructions will #UD.
An attempt to execute VBROADCASTSD encoded with VEX.L= 0 will cause an #UD exception.
Operation
VBROADCASTSS (128 bit version)
temp SRC[31:0]
FOR j 0 TO 3
DEST[31+j*32: j*32] temp
ENDFOR
DEST[VLMAX:128] 0
Op/
En
64/32
-bit
Mode
VBROADCASTSS (VEX.256 encoded version)
temp SRC[31:0]
FOR j 0 TO 7
DEST[31+j*32: j*32] temp
ENDFOR
CPUID
Feature
Flag
Description
VEX.128.66.0F38.W0 18 /r A V/V AVX Broadcast single-precision floating-point element in mem to four locations
in xmm1.
VBROADCASTSS xmm1, m32
VEX.256.66.0F38.W0 18 /r A V/V AVX Broadcast single-precision floating-point element in mem to eight locations
in ymm1.
VBROADCASTSS ymm1, m32
VEX.256.66.0F38.W0 19 /r A V/V AVX Broadcast double-precision floating-point element in mem to four locations
in ymm1.
VBROADCASTSD ymm1, m64
VEX.128.66.0F38.W0 18/r A V/V AVX2 Broadcast the low single-precision floating-point element in the
source operand to four locations in xmm1.
VBROADCASTSS xmm1,
xmm2
VEX.256.66.0F38.W0 18 /r A V/V AVX2 Broadcast low single-precision floating-point element in the source
operand to eight locations in ymm1.
VBROADCASTSS ymm1,
xmm2
VEX.256.66.0F38.W0 19 /r A V/V AVX2 Broadcast low double-precision floating-point element in the source
operand to four locations in ymm1.
VBROADCASTSD ymm1,
xmm2
Op/En Operand 1 Operand 2 Operand 3 Operand 4
A ModRM:reg (w) ModRM:r/m (r) NA NA
Ref. # 319433-014 5-175