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| author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2020-11-13 09:59:07 -0300 |
|---|---|---|
| committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2020-11-13 09:59:07 -0300 |
| commit | 9d067ab73b6befa0a5418f1df35c711f6c6918b3 (patch) | |
| tree | 250093c32a8b0575c8c47aced1bdbb7d3d7bc3fd /llimits.h | |
| parent | 2f4162bc473b995117e95c88230f637ca3e1c866 (diff) | |
| download | lua-5.4.2.tar.gz lua-5.4.2.tar.bz2 lua-5.4.2.zip | |
Optimization for 'n^2'v5.4.2
Squares are much more common than other exponentiations, and 'n*n' is
much more efficient than 'pow'.
Diffstat (limited to 'llimits.h')
| -rw-r--r-- | llimits.h | 3 |
1 files changed, 2 insertions, 1 deletions
| @@ -326,7 +326,8 @@ typedef l_uint32 Instruction; | |||
| 326 | 326 | ||
| 327 | /* exponentiation */ | 327 | /* exponentiation */ |
| 328 | #if !defined(luai_numpow) | 328 | #if !defined(luai_numpow) |
| 329 | #define luai_numpow(L,a,b) ((void)L, l_mathop(pow)(a,b)) | 329 | #define luai_numpow(L,a,b) \ |
| 330 | ((void)L, (b == 2) ? (a)*(a) : l_mathop(pow)(a,b)) | ||
| 330 | #endif | 331 | #endif |
| 331 | 332 | ||
| 332 | /* the others are quite standard operations */ | 333 | /* the others are quite standard operations */ |