|Opcode/Instruction||Op/En||64-Bit Mode||Compat/Leg Mode||Description|
66 0F 2A /r
CVTPI2PD xmm, mm/m64*
|RM||Valid||Valid||Convert two packed signed doubleword integers from mm/mem64 to two packed double-precision floating-point values in xmm.|
NOTES: *Operation is different for different operand sets; see the Description section.
|Op/En||Operand 1||Operand 2||Operand 3||Operand 4|
|RM||ModRM:reg (w)||ModRM:r/m (r)||NA||NA|
Converts two packed signed doubleword integers in the source operand (second operand) to two packed double-precision floating-point values in the destination operand (first operand).
The source operand can be an MMX technology register or a 64-bit memory location. The destination operand is an XMM register. In addition, depending on the operand configuration:
In 64-bit mode, use of the REX.R prefix permits this instruction to access additional registers (XMM8-XMM15).
DEST[63:0] ← Convert_Integer_To_Double_Precision_Floating_Point(SRC[31:0]); DEST[127:64] ← Convert_Integer_To_Double_Precision_Floating_Point(SRC[63:32]);
CVTPI2PD: __m128d _mm_cvtpi32_pd(__m64 a)
See Table 22-6, “Exception Conditions for Legacy SIMD/MMX Instructions with XMM and without FP Exception,” in the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 3B.