| ## Tests for various features of IEC60559 doubles. |
| ## Most of these are optional, so this is a sloppy test. |
| |
| # Goes to denormal (aka subnormal) numbers at -708.4 |
| exp(c(-745:-740, -730, -720, -710:-705)) |
| |
| # goes to subnormal numbers at -308, to zero at ca 5e-324. |
| 10^-(324:307) |
| 2^-(1022:1075) |
| |
| # And because most libm pow() functions special-case integer powers. |
| 10^-(324:307-0.01)/10^0.01 |
| |
| # IEC60559 mandates this, but C99/C11 do not. |
| # Mingw-w64 did not do so in v 2.0.1 |
| x <- 0*(-1) # negative zero |
| sqrt(x) |
| identical(x, sqrt(x)) |
