vrs4_sincosf: Four-valued single precision Sine and Cosine

• C Prototype:
  • void __vrs4_sincosf(__m128 x, __m128* S, __m128* C));
  • Inputs:
    • __m128 x - the single precision input value pair.
  • Outputs:
    • (Sine of x and Cosine of x.)
    • __m128 *S - Pointer to the single precision Sine result pair.
    • __m128 *C - Pointer to the single precision Cosine result pair.
• Notes:
  • __vrs4_sincosf computes the Sine and Cosine functions of four input arguments.
    
    This routine accepts four single precision input values passed as a __m128 value. The result is the single precision Sin and Cosine of all four values, returned as a __m128 value. This is a relaxed version of sincosf, suitable for use with fastmath compiler flags or application

    not requiring full error handling. Denormal inputs may produce unpredictable results. Special case inputs produce C99 return values. The routine is accurate to better than 1 ulp over the valid input range.

• Special case return values:

  • Input	Output
    QNaN	same QNaN
    SNaN	same NaN converted to QNaN
    +infinity	QNaN
    -infinity	QNaN

• Performance:
  • 220 cycles for most valid inputs < 5e5 (55 cycles per Sine and Cosine of a value).