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Overview
| Comment: | Use "long double" literals to initialize an array of "long double" objects. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
2e2ebad3ab636c4c65814ad41d417b10 |
| User & Date: | drh 2019-05-25 17:41:07 |
Context
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2019-05-25
| ||
| 18:17 | Performance enhancement in sqlite3AtoF(). About 8% faster. check-in: 81721aa5 user: drh tags: trunk | |
| 17:41 | Use "long double" literals to initialize an array of "long double" objects. check-in: 2e2ebad3 user: drh tags: trunk | |
| 13:14 | Add new cases to speedtest1 for measuring performance of binary to/from decimal conversions of floating point values. check-in: b84e7057 user: drh tags: trunk | |
Changes
Changes to src/util.c.
355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 |
** E==2 results in 100. E==50 results in 1.0e50.
**
** This routine only works for values of E between 1 and 341.
*/
static LONGDOUBLE_TYPE sqlite3Pow10(int E){
#if defined(_MSC_VER)
static const LONGDOUBLE_TYPE x[] = {
1.0e+001,
1.0e+002,
1.0e+004,
1.0e+008,
1.0e+016,
1.0e+032,
1.0e+064,
1.0e+128,
1.0e+256
};
LONGDOUBLE_TYPE r = 1.0;
int i;
assert( E>=0 && E<=307 );
for(i=0; E!=0; i++, E >>=1){
if( E & 1 ) r *= x[i];
}
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355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 |
** E==2 results in 100. E==50 results in 1.0e50.
**
** This routine only works for values of E between 1 and 341.
*/
static LONGDOUBLE_TYPE sqlite3Pow10(int E){
#if defined(_MSC_VER)
static const LONGDOUBLE_TYPE x[] = {
1.0e+001L,
1.0e+002L,
1.0e+004L,
1.0e+008L,
1.0e+016L,
1.0e+032L,
1.0e+064L,
1.0e+128L,
1.0e+256L
};
LONGDOUBLE_TYPE r = 1.0;
int i;
assert( E>=0 && E<=307 );
for(i=0; E!=0; i++, E >>=1){
if( E & 1 ) r *= x[i];
}
|