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* lib/std/io/stream: add LimitReader Signed-off-by: Pierre Curto <pierre.curto@gmail.com> * lib/std: more method conversions to use new receiver notation Signed-off-by: Pierre Curto <pierre.curto@gmail.com> --------- Signed-off-by: Pierre Curto <pierre.curto@gmail.com>
149 lines
3.2 KiB
C
149 lines
3.2 KiB
C
module std::math;
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// Move ODD_PHI into a shared module
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const ODD_PHI128 @local = 0x9e3779b97f4a7c15f39cc0605cedc835;
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const ODD_PHI64 @local = 0x9e3779b97f4a7c15;
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const ODD_PHI32 @local = 0x9e3779b9;
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const ODD_PHI16 @local = 0x9e37;
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const ODD_PHI8 @local = 0x9f;
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// -------------------------------- Msws128 --------------------------------
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struct Msws128 {
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uint128 state0, state1;
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uint128 weyl0, weyl1;
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}
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fn void Msws128.seed(&msws, char[16 * 4] seed)
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{
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*msws = bitcast(seed, Msws128);
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}
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fn uint128 Msws128.next(&msws)
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{
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uint128 s0 = msws.state0;
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msws.state0 = msws.state0 * msws.state0 + msws.weyl0;
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msws.state0 = msws.state0.rotr(64);
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msws.weyl0 += ODD_PHI128;
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msws.state1 = msws.state1 * msws.state1 + msws.weyl1;
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uint128 s1 = msws.state1;
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msws.state1 = msws.state1.rotr(64);
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msws.weyl1 -= ODD_PHI128;
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return s0 + s1;
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}
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// -------------------------------- Msws64 --------------------------------
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struct Msws64 {
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ulong state0, state1;
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ulong weyl0, weyl1;
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}
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fn void Msws64.seed(&msws, char[8 * 4] seed)
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{
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*msws = bitcast(seed, Msws64);
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}
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fn ulong Msws64.next(&msws)
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{
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ulong s0 = msws.state0;
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msws.state0 = msws.state0 * msws.state0 + msws.weyl0;
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msws.state0 = msws.state0.rotr(32);
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msws.weyl0 += ODD_PHI64;
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msws.state1 = msws.state1 * msws.state1 + msws.weyl1;
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ulong s1 = msws.state1;
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msws.state1 = msws.state1.rotr(32);
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msws.weyl1 -= ODD_PHI64;
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return s0 + s1;
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}
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// -------------------------------- Msws32 --------------------------------
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struct Msws32 {
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uint state0, state1;
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uint weyl0, weyl1;
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}
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fn void Msws32.seed(&msws, char[4 * 4] seed)
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{
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*msws = bitcast(seed, Msws32);
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}
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fn uint Msws32.next(&msws)
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{
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uint s0 = msws.state0;
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msws.state0 = msws.state0 * msws.state0 + msws.weyl0;
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msws.state0 = msws.state0.rotr(16);
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msws.weyl0 += ODD_PHI32;
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msws.state1 = msws.state1 * msws.state1 + msws.weyl1;
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uint s1 = msws.state1;
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msws.state1 = msws.state1.rotr(16);
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msws.weyl1 -= ODD_PHI32;
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return s0 + s1;
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}
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// -------------------------------- Msws16 --------------------------------
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struct Msws16 {
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ushort state0, state1;
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ushort weyl0, weyl1;
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}
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fn void Msws16.seed(&msws, char[2 * 4] seed)
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{
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*msws = bitcast(seed, Msws16);
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}
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fn ushort Msws16.next(&msws)
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{
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ushort s0 = msws.state0;
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msws.state0 = msws.state0 * msws.state0 + msws.weyl0;
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msws.state0 = msws.state0.rotr(8);
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msws.weyl0 += ODD_PHI16;
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msws.state1 = msws.state1 * msws.state1 + msws.weyl1;
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ushort s1 = msws.state1;
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msws.state1 = msws.state1.rotr(8);
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msws.weyl1 -= ODD_PHI16;
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return s0 + s1;
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}
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// -------------------------------- Msws8 --------------------------------
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struct Msws8 {
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char state0, state1;
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char weyl0, weyl1;
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}
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fn void Msws8.seed(&msws, char[1 * 4] seed)
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{
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*msws = bitcast(seed, Msws8);
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}
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fn char Msws8.next(&msws)
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{
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char s0 = msws.state0;
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msws.state0 = msws.state0 * msws.state0 + msws.weyl0;
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msws.state0 = msws.state0.rotr(4);
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msws.weyl0 += ODD_PHI8;
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msws.state1 = msws.state1 * msws.state1 + msws.weyl1;
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char s1 = msws.state1;
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msws.state1 = msws.state1.rotr(4);
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msws.weyl1 -= ODD_PHI8;
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return s0 + s1;
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}
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