Intel® Architecture Instruction Set Extensions Programming Reference

INSTRUCTION SET REFERENCE - FMA
VFMADDSUB132PS/VFMADDSUB213PS/VFMADDSUB231PS — Fused Multiply-Alternating
Add/Subtract of Packed Single-Precision Floating-Point Values
Opcode/
Instruction
VEX.DDS.128.66.0F38.W0
96 /r
VFMADDSUB132PS xmm0,
xmm1, xmm2/m128
VEX.DDS.128.66.0F38.W0
A6 /r
VFMADDSUB213PS xmm0,
xmm1, xmm2/m128
VEX.DDS.128.66.0F38.W0
B6 /r
VFMADDSUB231PS xmm0,
xmm1, xmm2/m128
VEX.DDS.256.66.0F38.W0
96 /r
VFMADDSUB132PS ymm0,
ymm1, ymm2/m256
VEX.DDS.256.66.0F38.W0
A6 /r
VFMADDSUB213PS ymm0,
ymm1, ymm2/m256
VEX.DDS.256.66.0F38.W0
B6 /r
VFMADDSUB231PS ymm0,
ymm1, ymm2/m256
Description
Op/
En
64/32
-bit
Mode
CPUID
Feature
Flag
Description
A V/V FMA Multiply packed single-precision floating-point values from xmm0 and
xmm2/mem, add/subtract elements in xmm1 and put result in xmm0.
A V/V FMA Multiply packed single-precision floating-point values from xmm0 and
xmm1, add/subtract elements in xmm2/mem and put result in xmm0.
A V/V FMA Multiply packed single-precision floating-point values from xmm1 and
xmm2/mem, add/subtract elements in xmm0 and put result in xmm0.
A V/V FMA Multiply packed single-precision floating-point values from ymm0 and
ymm2/mem, add/subtract elements in ymm1 and put result in ymm0.
A V/V FMA Multiply packed single-precision floating-point values from ymm0 and
ymm1, add/subtract elements in ymm2/mem and put result in ymm0.
A V/V FMA Multiply packed single-precision floating-point values from ymm1 and
ymm2/mem, add/subtract elements in ymm0 and put result in ymm0.
Instruction Operand Encoding
Op/En Operand 1 Operand 2 Operand 3 Operand 4
A ModRM:reg (r, w) VEX.vvvv (r) ModRM:r/m (r) NA
VFMADDSUB132PS: Multiplies the four or eight packed single-precision floating-point values from the first source
operand to the four or eight packed single-precision floating-point values in the third source operand. From the infinite
precision intermediate result, adds the odd single-precision floating-point elements and subtracts the even
single-precision floating-point values in the second source operand, performs rounding and stores the resulting
four or eight packed single-precision floating-point values to the destination operand (first source operand).
VFMADDSUB213PS: Multiplies the four or eight packed single-precision floating-point values from the second
source operand to the four or eight packed single-precision floating-point values in the first source operand. From
the infinite precision intermediate result, adds the odd single-precision floating-point elements and subtracts the
even single-precision floating-point values in the third source operand, performs rounding and stores the resulting
four or eight packed single-precision floating-point values to the destination operand (first source operand).
VFMADDSUB231PS: Multiplies the four or eight packed single-precision floating-point values from the second
source operand to the four or eight packed single-precision floating-point values in the third source operand. From
Ref. # 319433-014 6-15