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opt_int_div.h: make comments more descriptive
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@ -22,19 +22,20 @@
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#define OPT_INT_DIV_TEST(b) \
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/* check if b is a power of 2 */ \
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/* */ \
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/* formula: ( X & (X - 1) ) == 0 */ \
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/* condition: ( X & (X - 1) ) == 0 */ \
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((b) & ((b) - 1)) == 0
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// the main macro
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#define OPT_INT_DIV(a, b) \
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( /* beginning */ \
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/* check for equality of a and b */ \
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/* check for equality of abs(a) and abs(b) */ \
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INT_ABS((a)) == INT_ABS((b)) ? \
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/* the result is +/-1 */ \
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(INT_DIV_NEG_RESULT_SIGN(a, b) ? -1 : 1) : ( \
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\
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/* check if abs(a) < abs(b) */ \
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INT_ABS((a)) < INT_ABS((b)) ? \
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/* if abs(a) < abs(b), then the result is less than 1 (i.e., 0) */\
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0 : ( \
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\
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OPT_INT_DIV_TEST((b)) ? \
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