| Opcode/Instruction | Op/En | 64/32 bit Mode Support | CPUID Feature Flag | Description |
|---|---|---|---|---|
|
66 0F 5C /r SUBPD xmm1, xmm2/m128 |
RM | V/V | SSE2 | Subtract packed double-precision floating-point values in xmm2/m128 from xmm1. |
|
VEX.NDS.128.66.0F.WIG 5C /r VSUBPD xmm1,xmm2, xmm3/m128 |
RVM | V/V | AVX | Subtract packed double-precision floating-point values in xmm3/mem from xmm2 and stores result in xmm1. |
|
VEX.NDS.256.66.0F.WIG 5C /r VSUBPD ymm1, ymm2, ymm3/m256 |
RVM | V/V | AVX | Subtract packed double-precision floating-point values in ymm3/mem from ymm2 and stores result in ymm1. |
| 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 |
Performs a SIMD subtract of the two packed double-precision floating-point values in the source operand (second operand) from the two packed double-precision floating-point values in the destination operand (first operand), and stores the packed double-precision floating-point results in the destination operand. The source operand can be an XMM register or a 128-bit memory location. The destination operand is an XMM register. See Figure 11-3 in the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 1, for an illustration of a SIMD double-precision floating-point operation.
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: T second source can be an XMM register or an 128-bit memory location. The destina-tion 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.
SUBPD (128-bit Legacy SSE version)
DEST[63:0] ← DEST[63:0] - SRC[63:0] DEST[127:64] ← DEST[127:64] - SRC[127:64] DEST[VLMAX-1:128] (Unmodified)
VSUBPD (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
VSUBPD (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]
SUBPD:
__m128d _mm_sub_pd (m128d a, m128d b)
VSUBPD:
__m256d _mm256_sub_pd (__m256d a, __m256d b);
Overflow, Underflow, Invalid, Precision, Denormal.
See Exceptions Type 2.