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Optimization for 'n^2'

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Squares are much more common than other exponentiations, and 'n*n' is
much more efficient than 'pow'.
This commit is contained in:
Roberto Ierusalimschy 2020-11-13 09:59:07 -03:00
parent 2f4162bc47
commit 9d067ab73b
1 changed files with 2 additions and 1 deletions
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3
llimits.h
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@ -326,7 +326,8 @@ typedef l_uint32 Instruction;
/* exponentiation */
#if !defined(luai_numpow)
#define luai_numpow(L,a,b) ((void)L, l_mathop(pow)(a,b))
#define luai_numpow(L,a,b) \
((void)L, (b == 2) ? (a)*(a) : l_mathop(pow)(a,b))
#endif
/* the others are quite standard operations */