If, in addition, the most significant bit of DENOMINATOR must be 1,
then the pre-processor symbol UDIV_NEEDS_NORMALIZATION is defined to 1.
- 4) count_leading_zeros(count, x) counts the number of zero-bits from
+ 4) sdiv_qrnnd(quotient, remainder, high_numerator, low_numerator,
+ denominator). Like udiv_qrnnd but the numbers are signed. The
+ quotient is rounded towards 0.
+
+ 5) count_leading_zeros(count, x) counts the number of zero-bits from
the msb to the first non-zero bit. This is the number of steps X
needs to be shifted left to set the msb. Undefined for X == 0.
- 5) add_ssaaaa(high_sum, low_sum, high_addend_1, low_addend_1,
+ 6) add_ssaaaa(high_sum, low_sum, high_addend_1, low_addend_1,
high_addend_2, low_addend_2) adds two two-word unsigned integers,
composed by HIGH_ADDEND_1 and LOW_ADDEND_1, and HIGH_ADDEND_2 and
LOW_ADDEND_2 respectively. The result is placed in HIGH_SUM and
LOW_SUM. Overflow (i.e. carry out) is not stored anywhere, and is
lost.
- 6) sub_ddmmss(high_difference, low_difference, high_minuend,
+ 7) sub_ddmmss(high_difference, low_difference, high_minuend,
low_minuend, high_subtrahend, low_subtrahend) subtracts two
two-word unsigned integers, composed by HIGH_MINUEND_1 and
LOW_MINUEND_1, and HIGH_SUBTRAHEND_2 and LOW_SUBTRAHEND_2