FDECSTP
Usage: FDECSTP Modifies flags: None
Decrement Floating-Point Stack Pointer
FDECSTP ; D9 F6 [8086,FPU]
FDECSTP decrements the `top' field in the floating-point status word. This has the effect of rotating the FPU register stack by one, as if the contents of ST7 had been pushed on the stack. See also FINCSTP ( FINCSTP).
The C1 flag is set to 0. The C0, C2, and C3 flags are undefined.
EXAMPLE:
fdecstp