DIVPD—Divide Packed Double-Precision Floating-Point Values

Opcode/Instruction Op/En 64/32-bit Mode CPUID Feature Flag Description
66 0F 5E /r DIVPD xmm1, xmm2/m128 RM V/V SSE2 Divide packed double-precision floating-point values in xmm1 by packed double-precision floating-point values xmm2/m128.
VEX.NDS.128.66.0F.WIG 5E /r VDIVPD xmm1, xmm2, xmm3/m128 RVM V/V AVX Divide packed double-precision floating-point values in xmm2 by packed double-precision floating-point values in xmm3/mem.
VEX.NDS.256.66.0F.WIG 5E /r VDIVPD ymm1, ymm2, ymm3/m256 RVM V/V AVX Divide packed double-precision floating-point values in ymm2 by packed double-precision floating-point values in ymm3/mem.

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

Performs an SIMD divide of the two or four packed double-precision floating-point values in the first source operand by the two or four packed double-precision floating-point values in the second source operand. See Chapter 11 in the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 1, for an overview of a SIMD doubleprecision floating-point operation.

In 64-bit mode, use of the REX.R prefix 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 destination is not distinct from the first source XMM register and the upper bits (VLMAX-1:128) of the corresponding YMM register destination are unmodified. 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.

Operation

DIVPD (128-bit Legacy SSE version)
DEST[63:0] ← SRC1[63:0] / SRC2[63:0]
DEST[127:64] ← SRC1[127:64] / SRC2[127:64]
DEST[VLMAX-1:128] (Unmodified)
VDIVPD (VEX.128 encoded version)
DEST[63:0] ← SRC1[63:0] / SRC2[63:0]
DEST[127:64] ← SRC1[127:64] / SRC2[127:64]
DEST[VLMAX-1:128] ← 0
VDIVPD (VEX.256 encoded version)
DEST[63:0] ← SRC1[63:0] / SRC2[63:0]
DEST[127:64] ← SRC1[127:64] / SRC2[127:64]
DEST[191:128] ← SRC1[191:128] / SRC2[191:128]
DEST[255:192] ← SRC1[255:192] / SRC2[255:192]

Intel C/C++ Compiler Intrinsic Equivalent

DIVPD: __m128d _mm_div_pd(__m128d a, __m128d b)
VDIVPD: __m256d _mm256_div_pd (__m256d a, __m256d b);

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Divide-by-Zero, Precision, Denormal.

Other Exceptions

See Exceptions Type 2.