fdecstp

Decrement Stack-Top Pointer

FDECSTP

Decrements the TOP field in the FPU status word.

Details

The Decrement Stack-Top Pointer instruction decrements the TOP field in the FPU status word.

Pseudocode Operation

// Decrements the TOP field in the FPU status word

Example

FDECSTP

Encoding

Binary Layout
D9
+0
F6
+1
 
Format Legacy
Opcode D9 F6
Extension x87 FPU

Operands