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FLD
Pushes a floating-point value from the specified source onto the floating-point register stack.
The table after the description covers what the source and destinations can be.
| source | destination(s) |
|---|---|
| reg (ST(i)) | ST(0) |
| m4 (f32) | ST(0) |
| m8 (f64) | ST(0) |
| m10 (f80) | ST(0) |
DO NOT support LOCK
This instruction is supported in 64-bit mode, though the x87 FPU is primarily maintained for compatibility. The behavior is subject to the current floating-point control word.
If the floating-point stack is full, this instruction SHALL trigger a stack overflow exception. When loading from memory, the size of the operand (f32, f64, or f80) determines the precision of the value pushed; f32 and f64 values are converted to f80 internally. Precision control settings in the FPU control word may cause #P if the value cannot be represented exactly in the target precision.