Intel 253666-024US Benutzerhandbuch

3-382 Vol. 2A

FSINCOS—Sine and Cosine

INSTRUCTION SET REFERENCE, A-M

Operation

IF ST(0) < 2

THEN

C2 ← 0;

TEMP ← cosine(ST(0));

ST(0) ← sine(ST(0));

TOP ← TOP − 1;

ST(0) ← TEMP;

ELSE (* Source operand out of range *)

C2 ← 1;

FI;

FPU Flags Affected

Set to 0 if stack underflow occurred; set to 1 of stack overflow

occurs.

Set if result was rounded up; cleared otherwise.

Set to 1 if outside range (−2

< source operand < +2

); other-

wise, set to 0.

C0, C3

Undefined.

Floating-Point Exceptions

#IS

Stack underflow or overflow occurred.

#IA

Source operand is an SNaN value, ∞, or unsupported format.

Source operand is a denormal value.

Result is too small for destination format.

Value cannot be represented exactly in destination format.

Protected Mode Exceptions

#NM

CR0.EM[bit 2] or CR0.TS[bit 3] = 1.

#MF

If there is a pending x87 FPU exception.

#UD

If the LOCK prefix is used.

Real-Address Mode Exceptions

Same exceptions as in protected mode.

Virtual-8086 Mode Exceptions

Same exceptions as in protected mode.