On Wed, Oct 26, 2011 at 7:37 PM, Rodrigo Kumpera <[email protected]> wrote:
> > > On Wed, Oct 26, 2011 at 9:06 PM, Justin Holewinski < > [email protected]> wrote: > >> On Wed, Oct 26, 2011 at 6:15 PM, Rodrigo Kumpera <[email protected]>wrote: >> >>> The CLR demands that all floating point calculations to be conducted with >>> double precision. >> >> >> Where in the spec does it state this? Everything I've read allows for >> both 32-bit and 64-bit representations, with the only restriction being that >> arithmetic must be performed with enough precision for the expression type. >> >> And if 64-bit arithmetic is required, why is 32-bit used in the 32-bit >> Mono VM, and in the .NET VM? >> >> > > 32bits mono uses 64bits precision for both float and double types. > > AFAICT, .net uses 64bits precision on all cases. > I'm getting code like the following on .NET 4.0 x64: 00000099 mov rcx,qword ptr [rsp+000000D8h] 000000a1 mov rax,qword ptr [rsp+30h] 000000a6 movss xmm0,dword ptr [rsp+28h] 000000ac mulss xmm0,dword ptr [rcx+rax*4+10h] 000000b2 movss dword ptr [rsp+38h],xmm0 Is there any way to force Mono to use 32-bit arithmetic for floats? -- Thanks, Justin Holewinski
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