did not mark eax as an early-clobber register, so GCC might decide to pass the memory address
in eax, and it would get clobbered by the inline assembly before fetching the value to divide
by.
But rather than fix it by adding another '&', I have opted to mark it as in/out and do the
zeroing outside the inline assembly, so GCC has maximum flexibility for scheduling the code.
SVN r3242 (trunk)
former used fistp, which is not portable across platforms, so cannot be
used in the play simulation. They were only suitable for the renderer.
xs_Float.h also has a very fast float->fixed conversion, so FLOAT2FIXED
uses that now.
(And I also learned that the FPU's round to nearest is not the rounding I
learned in grade school but actually Banker's Rounding. I had no idea.)
(Also, also, the only thing that could have made quickertoint faster than
toint was that it stored a 32-bit int. I never timed them, and I doubt in
practice there was any real difference between the two.)
- Changed atan2f to atan2. Using floats is not a win, because the result is
returned as a double on the x87 stack, which the caller then needs to cast
down to a float using fst/fld.
SVN r1990 (trunk)
unsigned integer that can use all 32 bits. They must therefore use
the unsigned mul instruction rather than the signed imul instruction.
- Fixed several signed/unsigned comparison and possibly uninitialized
variable warnings flagged by GCC.
SVN r1965 (trunk)
Randy Heit