doc/guide/src/RunningOnSparc.adoc

   1 RunningOnSparc
   2 ==============
   3
   4 MLton runs fine on the Sparc architecture.
   5
   6 == Notes ==
   7
   8 * When compiling for Sparc, MLton targets the 32-bit Sparc
   9 architecture (i.e., Sparc V8).
  10
  11 * When compiling for Sparc, MLton doesn't support native code
  12 generation (`-codegen native`).  Hence, performance is not as good as
  13 it might be and compile times are longer.  Also, the quality of code
  14 generated by `gcc` is important.  By default, MLton calls `gcc -O1`.
  15 You can change this by calling MLton with `-cc-opt -O2`.  We have seen
  16 this speed up some programs by as much as 30%, especially those
  17 involving floating point; however, it can also more than double
  18 compile times.
  19
  20 * When compiling for Sparc, MLton uses `-align 8` by default.  While
  21 this speeds up reals, it also may increase object sizes.  If your
  22 program does not make significant use of reals, you might see a
  23 speedup with `-align 4`.
  24
  25 == Known issues ==
  26
  27 * Bootstrapping on the <:RunningOnSparc:Sparc architecture> is so slow
  28 as to be impractical (many hours on a 500MHz UltraSparc).  For this
  29 reason, we strongly recommend building with a
  30 <:CrossCompiling:cross compiler>.
  31
  32 == Also see ==
  33
  34 * <:RunningOnSolaris:>