| 48 | } |
| 49 | |
| 50 | staticfn void isaac64_update(isaac64_ctx *_ctx){ |
| 51 | uint64_t *m; |
| 52 | uint64_t *r; |
| 53 | uint64_t a; |
| 54 | uint64_t b; |
| 55 | uint64_t x; |
| 56 | uint64_t y; |
| 57 | int i; |
| 58 | m=_ctx->m; |
| 59 | r=_ctx->r; |
| 60 | a=_ctx->a; |
| 61 | b=_ctx->b+(++_ctx->c); |
| 62 | for(i=0;i<ISAAC64_SZ/2;i++){ |
| 63 | x=m[i]; |
| 64 | a=~(a^a<<21)+m[i+ISAAC64_SZ/2]; |
| 65 | m[i]=y=m[lower_bits(x)]+a+b; |
| 66 | r[i]=b=m[upper_bits(y)]+x; |
| 67 | x=m[++i]; |
| 68 | a=(a^a>>5)+m[i+ISAAC64_SZ/2]; |
| 69 | m[i]=y=m[lower_bits(x)]+a+b; |
| 70 | r[i]=b=m[upper_bits(y)]+x; |
| 71 | x=m[++i]; |
| 72 | a=(a^a<<12)+m[i+ISAAC64_SZ/2]; |
| 73 | m[i]=y=m[lower_bits(x)]+a+b; |
| 74 | r[i]=b=m[upper_bits(y)]+x; |
| 75 | x=m[++i]; |
| 76 | a=(a^a>>33)+m[i+ISAAC64_SZ/2]; |
| 77 | m[i]=y=m[lower_bits(x)]+a+b; |
| 78 | r[i]=b=m[upper_bits(y)]+x; |
| 79 | } |
| 80 | for(i=ISAAC64_SZ/2;i<ISAAC64_SZ;i++){ |
| 81 | x=m[i]; |
| 82 | a=~(a^a<<21)+m[i-ISAAC64_SZ/2]; |
| 83 | m[i]=y=m[lower_bits(x)]+a+b; |
| 84 | r[i]=b=m[upper_bits(y)]+x; |
| 85 | x=m[++i]; |
| 86 | a=(a^a>>5)+m[i-ISAAC64_SZ/2]; |
| 87 | m[i]=y=m[lower_bits(x)]+a+b; |
| 88 | r[i]=b=m[upper_bits(y)]+x; |
| 89 | x=m[++i]; |
| 90 | a=(a^a<<12)+m[i-ISAAC64_SZ/2]; |
| 91 | m[i]=y=m[lower_bits(x)]+a+b; |
| 92 | r[i]=b=m[upper_bits(y)]+x; |
| 93 | x=m[++i]; |
| 94 | a=(a^a>>33)+m[i-ISAAC64_SZ/2]; |
| 95 | m[i]=y=m[lower_bits(x)]+a+b; |
| 96 | r[i]=b=m[upper_bits(y)]+x; |
| 97 | } |
| 98 | _ctx->b=b; |
| 99 | _ctx->a=a; |
| 100 | _ctx->n=ISAAC64_SZ; |
| 101 | } |
| 102 | |
| 103 | staticfn void isaac64_mix(uint64_t _x[8]){ |
| 104 | static const unsigned char SHIFT[8]={9,9,23,15,14,20,17,14}; |
no test coverage detected