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< a name = "l1" > < / a > < span class = cF2 > /*< / span > < span class = cF0 >
< a name = "l2" > < / a > < / span > < span class = cF2 > " Fixed point" means you use ints< / span > < span class = cF0 >
< a name = "l3" > < / a > < / span > < span class = cF2 > that are scaled by a value. A common< / span > < span class = cF0 >
< a name = "l4" > < / a > < / span > < span class = cF2 > example would be using number of pennies< / span > < span class = cF0 >
< a name = "l5" > < / a > < / span > < span class = cF2 > instead of dollars with a float.< / span > < span class = cF0 >
< a name = "l6" > < / a >
< a name = "l7" > < / a > < / span > < span class = cF2 > Fixed-point used to be much < / span > < a href = "http://en.wikipedia.org/wiki/X87" > < span class = cF2 > faster< / span > < / a > < span class = cF2 > ,< / span > < span class = cF0 >
< a name = "l8" > < / a > < / span > < span class = cF2 > but modern processors do well with< / span > < span class = cF0 >
< a name = "l9" > < / a > < / span > < span class = cF2 > floats. It also depends on the compiler< / span > < span class = cF0 >
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< a name = "l10" > < / a > < / span > < span class = cF2 > and the ZealC compiler is poor with floats.< / span > < span class = cF0 >
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< a name = "l11" > < / a >
< a name = "l12" > < / a > < / span > < span class = cF2 > Terry often used 64-bit ints with upper 32-bits< / span > < span class = cF0 >
< a name = "l13" > < / a > < / span > < span class = cF2 > as int and lower 32-bits as fraction.< / span > < span class = cF0 >
< a name = "l14" > < / a >
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< a name = "l15" > < / a > < / span > < span class = cF2 > See < / span > < a href = "https://zeal-operating-system.github.io/ZealOS/Demo/SubIntAccess.ZC.html#l1" > < span class = cF4 > ::/Demo/SubIntAccess.ZC< / span > < / a > < span class = cF2 > for how< / span > < span class = cF0 >
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< a name = "l16" > < / a > < / span > < span class = cF2 > to access upper or lower 32-bits.< / span > < span class = cF0 >
< a name = "l17" > < / a >
< a name = "l18" > < / a > < / span > < span class = cF2 > For a complete list of nonstandard compiler< / span > < span class = cF0 >
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< a name = "l19" > < / a > < / span > < span class = cF2 > features, see < / span > < a href = "https://zeal-operating-system.github.io/ZealOS/Doc/ZealC.DD.html#l1" > < span class = cF4 > ::/Doc/ZealC.DD< / span > < / a > < span class = cF2 > .< / span > < span class = cF0 >
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< a name = "l20" > < / a > < / span > < span class = cF2 > */< / span > < span class = cF0 >
< a name = "l21" > < / a >
< a name = "l22" > < / a > < / span > < span class = cF1 > U0< / span > < span class = cF0 > Main()
< a name = "l23" > < / a > {
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< a name = "l24" > < / a > < / span > < span class = cF1 > F64< / span > < span class = cF0 > t0, f_sum=< / span > < span class = cFE > 0< / span > < span class = cF0 > , f_val;
< a name = "l25" > < / a > < / span > < span class = cF9 > I64< / span > < span class = cF0 > i , i_sum=< / span > < span class = cFE > 0< / span > < span class = cF0 > , i_val;
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< a name = "l26" > < / a >
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< a name = "l27" > < / a > i_val = < / span > < span class = cFE > 2< / span > < span class = cF0 > .< / span > < span class = cFE > 0000002< / span > < span class = cF0 > * < / span > < span class = cFE > 0x100000000< / span > < span class = cF0 > ;
< a name = "l28" > < / a > t0 = < / span > < span class = cF5 > tS< / span > < span class = cF0 > ;
< a name = "l29" > < / a > < / span > < span class = cF1 > for< / span > < span class = cF0 > (i = < / span > < span class = cFE > 1000000000< / span > < span class = cF0 > ; i; i--)
< a name = "l30" > < / a > i_sum += i_val;
< a name = "l31" > < / a > < / span > < span class = cF6 > " Int Sum\t\t:%.9f Time:%7.3fs\n" < / span > < span class = cF0 > , i_sum / < / span > < span class = cF5 > ToF64< / span > < span class = cF0 > (< / span > < span class = cFE > 0x100000000< / span > < span class = cF0 > ), < / span > < span class = cF5 > tS< / span > < span class = cF0 > - t0;
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< a name = "l32" > < / a >
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< a name = "l33" > < / a > f_val = < / span > < span class = cFE > 2< / span > < span class = cF0 > .< / span > < span class = cFE > 0000002< / span > < span class = cF0 > ;
< a name = "l34" > < / a > t0 = < / span > < span class = cF5 > tS< / span > < span class = cF0 > ;
< a name = "l35" > < / a > < / span > < span class = cF1 > for< / span > < span class = cF0 > (i = < / span > < span class = cFE > 1000000000< / span > < span class = cF0 > ; i; i--)
< a name = "l36" > < / a > f_sum += f_val;
< a name = "l37" > < / a > < / span > < span class = cF6 > " Float Sum\t:%.9f Time:%7.3fs\n" < / span > < span class = cF0 > , f_sum, < / span > < span class = cF5 > tS< / span > < span class = cF0 > - t0;
< a name = "l38" > < / a > < / span > < span class = cF6 > '\n'< / span > < span class = cF0 > ;
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< a name = "l39" > < / a > }
< a name = "l40" > < / a >
< a name = "l41" > < / a > < / span > < span class = cF1 > U0< / span > < span class = cF0 > DoIt2()
< a name = "l42" > < / a > {
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< a name = "l43" > < / a > < / span > < span class = cF9 > I64< / span > < span class = cF0 > i = < / span > < span class = cFE > 0x123456789ABCDEF0< / span > < span class = cF0 > ;
< a name = "l44" > < / a > < / span > < span class = cF6 > " i\t\t=%X\n" < / span > < span class = cF0 > , i;
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< a name = "l45" > < / a >
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< a name = "l46" > < / a > < / span > < span class = cF6 > " i& 0xFFFFFFFF\t=%X\n" < / span > < span class = cF0 > , i & < / span > < span class = cFE > 0xFFFFFFFF< / span > < span class = cF0 > ;
< a name = "l47" > < / a > < / span > < span class = cF6 > " i> > 32\t\t=%X\n" < / span > < span class = cF0 > , i > > < / span > < span class = cFE > 32< / span > < span class = cF0 > ;
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< a name = "l48" > < / a >
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< a name = "l49" > < / a > < / span > < span class = cF2 > /*< / span > < span class = cF0 > < / span > < span class = cF2 > Standard int types are declared< / span > < span class = cF0 >
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< a name = "l50" > < / a > < / span > < span class = cF2 > with a special compiler feature which< / span > < span class = cF0 >
< a name = "l51" > < / a > < / span > < span class = cF2 > allows a structure to be accessed as a< / span > < span class = cF0 >
< a name = "l52" > < / a > < / span > < span class = cF2 > whole. That's why the i variable can< / span > < span class = cF0 >
< a name = "l53" > < / a > < / span > < span class = cF2 > be accessed normally in addition to< / span > < span class = cF0 >
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< a name = "l54" > < / a > < / span > < span class = cF2 > structure member access < / span > < a href = "https://zeal-operating-system.github.io/ZealOS/Kernel/KernelA.HH.html#l103" > < span class = cF4 > I64< / span > < / a > < span class = cF2 > . The actual< / span > < span class = cF0 >
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< a name = "l55" > < / a > < / span > < span class = cF2 > intrinsic compiler type is U64i.< / span > < span class = cF0 >
< a name = "l56" > < / a >
< a name = "l57" > < / a > < / span > < span class = cF2 > public U64i union I64< / span > < span class = cF0 >
< a name = "l58" > < / a > < / span > < span class = cF2 > {< / span > < span class = cF0 >
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< a name = "l59" > < / a > < / span > < span class = cF2 > I8i i8[8];< / span > < span class = cF0 >
< a name = "l60" > < / a > < / span > < span class = cF2 > U8i u8[8];< / span > < span class = cF0 >
< a name = "l61" > < / a > < / span > < span class = cF2 > I16 i16[4];< / span > < span class = cF0 >
< a name = "l62" > < / a > < / span > < span class = cF2 > U16 u16[4];< / span > < span class = cF0 >
< a name = "l63" > < / a > < / span > < span class = cF2 > I32 i32[2];< / span > < span class = cF0 >
< a name = "l64" > < / a > < / span > < span class = cF2 > U32 u32[2];< / span > < span class = cF0 >
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< a name = "l65" > < / a > < / span > < span class = cF2 > };< / span > < span class = cF0 >
< a name = "l66" > < / a >
< a name = "l67" > < / a > < / span > < span class = cF2 > It's not quite as great as it seems< / span > < span class = cF0 >
< a name = "l68" > < / a > < / span > < span class = cF2 > because the compiler decides it cannot< / span > < span class = cF0 >
Rename abs_addres to abs_address.
Update documentation/comments to rename addr, fun, var, stmt, blk, desc, reg, seg, ptr, dup, clus, val, and bttn, to address, function, variable, statement, block, description, register, segment, pointer, duplicate, cluster, value, and button, respectively.
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< a name = "l69" > < / a > < / span > < span class = cF2 > place i into a register, so there is a< / span > < span class = cF0 >
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< a name = "l70" > < / a > < / span > < span class = cF2 > penalty.< / span > < span class = cF0 >
< a name = "l71" > < / a >
< a name = "l72" > < / a > < / span > < span class = cF2 > For a complete list of nonstandard compiler< / span > < span class = cF0 >
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< a name = "l73" > < / a > < / span > < span class = cF2 > features, see < / span > < a href = "https://zeal-operating-system.github.io/ZealOS/Doc/ZealC.DD.html#l1" > < span class = cF4 > ::/Doc/ZealC.DD< / span > < / a > < span class = cF2 > .< / span > < span class = cF0 >
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< a name = "l74" > < / a > < / span > < span class = cF2 > */< / span > < span class = cF0 >
< a name = "l75" > < / a >
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< a name = "l76" > < / a > < / span > < span class = cF6 > " i.u32[0]\t=%X\n" < / span > < span class = cF0 > , i.u32[< / span > < span class = cFE > 0< / span > < span class = cF0 > ];
< a name = "l77" > < / a > < / span > < span class = cF6 > " i.u32[1]\t=%X\n" < / span > < span class = cF0 > , i.u32[< / span > < span class = cFE > 1< / span > < span class = cF0 > ];
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< a name = "l78" > < / a > }
< a name = "l79" > < / a >
< a name = "l80" > < / a > < / span > < span class = cF5 > CPURep< / span > < span class = cF0 > ;
< a name = "l81" > < / a > Main;
< a name = "l82" > < / a > DoIt2;
< a name = "l83" > < / a >
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< a name = "l84" > < / a > < / span > < span class = cF2 > //See < / span > < a href = "https://zeal-operating-system.github.io/ZealOS/Demo/Lectures/FixedPointAdvanced.ZC.html#l1" > < span class = cF4 > ::/Demo/Lectures/FixedPointAdvanced.ZC< / span > < / a > < span class = cF0 >
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< a name = "l85" > < / a >
< a name = "l86" > < / a > < / span > < span class = cF2 > /*Program Output< / span > < span class = cF1 >
< a name = "l87" > < / a >
< a name = "l88" > < / a > 16 Cores 3.500GHz
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< a name = "l89" > < / a > Int Sum :2000000199.768690240 Time: 0.803s
< a name = "l90" > < / a > Float Sum :2000000225.656127040 Time: 3.615s
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< a name = "l91" > < / a >
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< a name = "l92" > < / a > i =123456789ABCDEF0
< a name = "l93" > < / a > i& 0xFFFFFFFF =9ABCDEF0
< a name = "l94" > < / a > i> > 32 =12345678
< a name = "l95" > < / a > i.u32[0] =9ABCDEF0
< a name = "l96" > < / a > i.u32[1] =12345678
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< a name = "l97" > < / a > < / span > < span class = cF2 > */< / span > < span class = cF1 >
< / span > < / pre > < / body >
< / html >
