FADD $X,$Y,$Z
FSUB $X,$Y,$Z
FMUL $X,$Y,$Z
FDIV $X,$Y,$Z
FREM $X,$Y,$Z
FSQRT $X,$Z
FINT $X,$Z
Specification:
FDIV: | f($X) | ← f($Y) ∕ f($Z) |
FREM: | f($X) | ← f($Y) rem f($Z) |
y rem z is defined as y-nz, where n is the integer number closest to y∕z, or the closest even number in case of multiple closest integers. | ||
FINT: | f($X) | ← f(int(f($Z))) |
FSQRT: | f($X) | ← f($Z)^{1∕2} |
Timing:
4υ for FADD, FSUB, FMUL, FREM and FINT
40υ for FDIV and FSQRT
Description:
FADD, FSUB, FMUL, and FDIV perform arithmetic on floating point numbers. FINT rounds a floating point number to the nearest integer number using the current rounding mode. Unlike FIX, the result is still in floating point format. The instructions FINT and FSQRT can use the optional Y-Operand to specify a rounding mode: ROUND_OFF, ROUND_UP, ROUND_DOWN, or ROUND_NEAR.