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RDSSPD
Reads the Scalar Double-precision Floating-Point Streaming Dataset size from the specified source and stores it into the destination register.
The table after the description covers what the source and destinations can be.
| source | destination(s) |
|---|---|
| imm | #I |
| reg | r64 |
| m64 | r64 |
DO NOT support LOCK
This instruction is ONLY available in 64-bit mode. It is NOT supported in compatibility mode.
The instruction requires the processor to support the specific extension set associated with Streaming Datasets; attempting to execute this on a processor lacking this feature WILL result in an invalid opcode exception. Ensure the destination register is 64-bit to avoid truncation of the dataset size value.