ADDSUBPS—Packed Single-FP Add/Subtract

Opcode/Instruction Op/En 64/32-bit Mode CPUID Feature Flag Description

F2 0F D0 /r

ADDSUBPS xmm1, xmm2/m128

 RM V/V SSE3 Add/subtract single-precision floating-point values from xmm2/m128 to xmm1.

VEX.NDS.128.F2.0F.WIG D0 /r

VADDSUBPS xmm1, xmm2, xmm3/m128

 RVM V/V AVX Add/subtract single-precision floating-point values from xmm3/mem to xmm2 and stores result in xmm1.

VEX.NDS.256.F2.0F.WIG D0 /r

VADDSUBPS ymm1, ymm2, ymm3/m256

 RVM V/V AVX Add / subtract single-precision floating-point values from ymm3/mem to ymm2 and stores result in ymm1.

Instruction Operand Encoding

Op/En Operand 1 Operand 2 Operand 3 Operand 4
RM ModRM:reg (r, w) ModRM:r/m (r) NA NA
RVM ModRM:reg (w) VEX.vvvv (r) ModRM:r/m (r) NA

Description

Adds odd-numbered single-precision floating-point values of the first source operand (second operand) with the corresponding single-precision floating-point values from the second source operand (third operand); stores the result in the odd-numbered values of the destination operand (first operand). Subtracts the even-numbered single-precision floating-point values from the second source operand from the corresponding single-precision floating values in the first source operand; stores the result into the even-numbered values of the destination operand.

In 64-bit mode, using a REX prefix in the form of REX.R permits this instruction to access additional registers (XMM8-XMM15).

128-bit Legacy SSE version: The second source can be an XMM register or an 128-bit memory location. The desti-nation is not distinct from the first source XMM register and the upper bits (VLMAX-1:128) of the corresponding YMM register destination are unmodified. See Figure 3-4.

VEX.128 encoded version: the first source operand is an XMM register or 128-bit memory location. The destination operand is an XMM register. The upper bits (VLMAX-1:128) of the corresponding YMM register destination are zeroed.

VEX.256 encoded version: The first source operand is a YMM register. The second source operand can be a YMM register or a 256-bit memory location. The destination operand is a YMM register.

ADDSUBPS xmm1, xmm2/m128 xmm2/ [127:96] [95:64] [63:32] [31:0] m128 RESULT: xmm1[127:96] + xmm1[95:64] - xmm2/ xmm1[63:32] + xmm1[31:0] - xmm1 xmm2/m128[127:96] m128[95:64] xmm2/m128[63:32] xmm2/m128[31:0] [127:96] [95:64] [63:32] [31:0] OM15992

Figure 3-4. ADDSUBPS—Packed Single-FP Add/Subtract

Operation

ADDSUBPS (128-bit Legacy SSE version)

DEST[31:0] ← DEST[31:0] - SRC[31:0]
DEST[63:32] ← DEST[63:32] + SRC[63:32]
DEST[95:64] ← DEST[95:64] - SRC[95:64]
DEST[127:96] ← DEST[127:96] + SRC[127:96]
DEST[VLMAX-1:128] (Unmodified)

VADDSUBPS (VEX.128 encoded version)

DEST[31:0] ← SRC1[31:0] - SRC2[31:0]
DEST[63:32] ← SRC1[63:32] + SRC2[63:32]
DEST[95:64] ← SRC1[95:64] - SRC2[95:64]
DEST[127:96] ← SRC1[127:96] + SRC2[127:96]
DEST[VLMAX-1:128] ← 0

VADDSUBPS (VEX.256 encoded version)

DEST[31:0] ← SRC1[31:0] - SRC2[31:0]
DEST[63:32] ← SRC1[63:32] + SRC2[63:32]
DEST[95:64] ← SRC1[95:64] - SRC2[95:64]
DEST[127:96] ← SRC1[127:96] + SRC2[127:96]
DEST[159:128] ← SRC1[159:128] - SRC2[159:128]
DEST[191:160]← SRC1[191:160] + SRC2[191:160]
DEST[223:192] ← SRC1[223:192] - SRC2[223:192]
DEST[255:224] ← SRC1[255:224] + SRC2[255:224].

Intel C/C++ Compiler Intrinsic Equivalent

ADDSUBPS:

__m128 _mm_addsub_ps(__m128 a, __m128 b)

VADDSUBPS:

__m256 _mm256_addsub_ps (__m256 a, __m256 b)

Exceptions

When the source operand is a memory operand, the operand must be aligned on a 16-byte boundary or a general-protection exception (#GP) will be generated.

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Precision, Denormal.

Other Exceptions

See Exceptions Type 2.