ref: 14c196a5da48284123d615418c80b6fbc87d7f46
dir: /operators.c/
#include "flisp.h" #include "operators.h" mpint * conv_to_mpint(void *data, numerictype_t tag) { switch(tag){ case T_INT8: return itomp(*(int8_t*)data, nil); case T_UINT8: return uitomp(*(uint8_t*)data, nil); case T_INT16: return itomp(*(int16_t*)data, nil); case T_UINT16: return uitomp(*(uint16_t*)data, nil); case T_INT32: return itomp(*(int32_t*)data, nil); case T_UINT32: return uitomp(*(uint32_t*)data, nil); case T_INT64: return vtomp(*(int64_t*)data, nil); case T_UINT64: return uvtomp(*(int64_t*)data, nil); case T_MPINT: return mpcopy(*(mpint**)data); case T_FLOAT: return dtomp(*(float*)data, nil); case T_DOUBLE: return dtomp(*(double*)data, nil); } return mpzero; } double conv_to_double(void *data, numerictype_t tag) { double d; switch(tag){ case T_INT8: return *(int8_t*)data; case T_UINT8: return *(uint8_t*)data; case T_INT16: return *(int16_t*)data; case T_UINT16: return *(uint16_t*)data; case T_INT32: return *(int32_t*)data; case T_UINT32: return *(uint32_t*)data; case T_INT64: d = *(int64_t*)data; if(d > 0 && *(int64_t*)data < 0) // can happen! d = -d; return d; case T_UINT64: return *(uint64_t*)data; case T_MPINT: return mptod(*(mpint**)data); case T_FLOAT: return *(float*)data; case T_DOUBLE: return *(double*)data; } return 0; } void conv_from_double(void *dest, double d, numerictype_t tag) { switch(tag){ case T_INT8: *(int8_t*)dest = d; break; case T_UINT8: *(uint8_t*)dest = d; break; case T_INT16: *(int16_t*)dest = d; break; case T_UINT16: *(uint16_t*)dest = d; break; case T_INT32: *(int32_t*)dest = d; break; case T_UINT32: *(uint32_t*)dest = d; break; case T_INT64: *(int64_t*)dest = d; if(d > 0 && *(int64_t*)dest < 0) // 0x8000000000000000 is a bitch *(int64_t*)dest = INT64_MAX; break; case T_UINT64: *(uint64_t*)dest = (int64_t)d; break; case T_MPINT: *(mpint**)dest = dtomp(d, nil); break; case T_FLOAT: *(float*)dest = d; break; case T_DOUBLE: *(double*)dest = d; break; } } // FIXME sign with mpint #define CONV_TO_INTTYPE(name, ctype) \ ctype \ conv_to_##name(void *data, numerictype_t tag) \ { \ switch(tag){ \ case T_INT8: return (ctype)*(int8_t*)data; \ case T_UINT8: return (ctype)*(uint8_t*)data; \ case T_INT16: return (ctype)*(int16_t*)data; \ case T_UINT16: return (ctype)*(uint16_t*)data; \ case T_INT32: return (ctype)*(int32_t*)data; \ case T_UINT32: return (ctype)*(uint32_t*)data; \ case T_INT64: return (ctype)*(int64_t*)data; \ case T_UINT64: return (ctype)*(uint64_t*)data; \ case T_MPINT: return (ctype)mptov(*(mpint**)data); \ case T_FLOAT: return (ctype)*(float*)data; \ case T_DOUBLE: return (ctype)*(double*)data; \ } \ return 0; \ } CONV_TO_INTTYPE(int64, int64_t) CONV_TO_INTTYPE(int32, int32_t) CONV_TO_INTTYPE(uint32, uint32_t) // this is needed to work around an UB casting negative // floats and doubles to uint64. you need to cast to int64 // first. uint64_t conv_to_uint64(void *data, numerictype_t tag) { int64_t s; switch(tag){ case T_INT8: return *(int8_t*)data; break; case T_UINT8: return *(uint8_t*)data; break; case T_INT16: return *(int16_t*)data; break; case T_UINT16: return *(uint16_t*)data; break; case T_INT32: return *(int32_t*)data; break; case T_UINT32: return *(uint32_t*)data; break; case T_INT64: return *(int64_t*)data; break; case T_UINT64: return *(uint64_t*)data; break; case T_MPINT: return mptouv(*(mpint**)data); break; case T_FLOAT: if(*(float*)data >= 0) return *(float*)data; s = *(float*)data; return s; case T_DOUBLE: if(*(double*)data >= 0) return *(double*)data; s = *(double*)data; return s; } return 0; } int cmp_same_lt(void *a, void *b, numerictype_t tag) { switch(tag){ case T_INT8: return *(int8_t*)a < *(int8_t*)b; case T_UINT8: return *(uint8_t*)a < *(uint8_t*)b; case T_INT16: return *(int16_t*)a < *(int16_t*)b; case T_UINT16: return *(uint16_t*)a < *(uint16_t*)b; case T_INT32: return *(int32_t*)a < *(int32_t*)b; case T_UINT32: return *(uint32_t*)a < *(uint32_t*)b; case T_INT64: return *(int64_t*)a < *(int64_t*)b; case T_UINT64: return *(uint64_t*)a < *(uint64_t*)b; case T_MPINT: return mpcmp(*(mpint**)a, *(mpint**)b) < 0; case T_FLOAT: return *(float*)a < *(float*)b; case T_DOUBLE: return *(double*)a < *(double*)b; } return 0; } int cmp_same_eq(void *a, void *b, numerictype_t tag) { switch(tag){ case T_INT8: return *(int8_t*)a == *(int8_t*)b; case T_UINT8: return *(uint8_t*)a == *(uint8_t*)b; case T_INT16: return *(int16_t*)a == *(int16_t*)b; case T_UINT16: return *(uint16_t*)a == *(uint16_t*)b; case T_INT32: return *(int32_t*)a == *(int32_t*)b; case T_UINT32: return *(uint32_t*)a == *(uint32_t*)b; case T_INT64: return *(int64_t*)a == *(int64_t*)b; case T_UINT64: return *(uint64_t*)a == *(uint64_t*)b; case T_MPINT: return mpcmp(*(mpint**)a, *(mpint**)b) == 0; case T_FLOAT: return *(float*)a == *(float*)b; case T_DOUBLE: return *(double*)a == *(double*)b; } return 0; } /* FIXME one is allocated for all compare ops */ static mpint *cmpmpint; int cmp_lt(void *a, numerictype_t atag, void *b, numerictype_t btag) { if(atag == btag) return cmp_same_lt(a, b, atag); double da = conv_to_double(a, atag); double db = conv_to_double(b, btag); // casting to double will only get the wrong answer for big int64s // that differ in low bits if(da < db && !isnan(da) && !isnan(db)) return 1; if(db < da) return 0; if(cmpmpint == nil && (atag == T_MPINT || btag == T_MPINT)) cmpmpint = mpnew(0); if(atag == T_UINT64){ if(btag == T_INT64){ if(*(int64_t*)b >= 0) return (*(uint64_t*)a < (uint64_t)*(int64_t*)b); return ((int64_t)*(uint64_t*)a < *(int64_t*)b); } if(btag == T_DOUBLE) return db == db ? (*(uint64_t*)a < (uint64_t)*(double*)b) : 0; if(btag == T_MPINT) return mpcmp(uvtomp(*(uint64_t*)a, cmpmpint), *(mpint**)b) < 0; } if(atag == T_INT64){ if(btag == T_UINT64){ if(*(int64_t*)a >= 0) return ((uint64_t)*(int64_t*)a < *(uint64_t*)b); return (*(int64_t*)a < (int64_t)*(uint64_t*)b); } if(btag == T_DOUBLE) return db == db ? (*(int64_t*)a < (int64_t)*(double*)b) : 0; if(btag == T_MPINT) return mpcmp(vtomp(*(int64_t*)a, cmpmpint), *(mpint**)b) < 0; } if(btag == T_UINT64){ if(atag == T_DOUBLE) return da == da ? (*(uint64_t*)b > (uint64_t)*(double*)a) : 0; if(atag == T_MPINT) return mpcmp(*(mpint**)a, uvtomp(*(uint64_t*)b, cmpmpint)) < 0; } if(btag == T_INT64){ if(atag == T_DOUBLE) return da == da ? (*(int64_t*)b > (int64_t)*(double*)a) : 0; if(atag == T_MPINT) return mpcmp(*(mpint**)a, vtomp(*(int64_t*)b, cmpmpint)) < 0; } return 0; } int cmp_eq(void *a, numerictype_t atag, void *b, numerictype_t btag, int equalnans) { union { double d; int64_t i64; }u, v; if(atag == btag && (!equalnans || atag < T_FLOAT)) return cmp_same_eq(a, b, atag); double da = conv_to_double(a, atag); double db = conv_to_double(b, btag); if((int)atag >= T_FLOAT && (int)btag >= T_FLOAT){ if(equalnans){ u.d = da; v.d = db; return u.i64 == v.i64; } return da == db; } if(da != db) return 0; if(cmpmpint == nil && (atag == T_MPINT || btag == T_MPINT)) cmpmpint = mpnew(0); if(atag == T_UINT64){ // this is safe because if a had been bigger than INT64_MAX, // we would already have concluded that it's bigger than b. if(btag == T_INT64) return ((int64_t)*(uint64_t*)a == *(int64_t*)b); if(btag == T_DOUBLE) return (*(uint64_t*)a == (uint64_t)(int64_t)*(double*)b); if(btag == T_MPINT) return mpcmp(uvtomp(*(uint64_t*)a, cmpmpint), *(mpint**)b) == 0; } if(atag == T_INT64){ if(btag == T_UINT64) return (*(int64_t*)a == (int64_t)*(uint64_t*)b); if(btag == T_DOUBLE) return (*(int64_t*)a == (int64_t)*(double*)b); if(btag == T_MPINT) return mpcmp(vtomp(*(int64_t*)a, cmpmpint), *(mpint**)b) == 0; } if(btag == T_UINT64){ if(atag == T_INT64) return ((int64_t)*(uint64_t*)b == *(int64_t*)a); if(atag == T_DOUBLE) return (*(uint64_t*)b == (uint64_t)(int64_t)*(double*)a); if(atag == T_MPINT) return mpcmp(*(mpint**)a, uvtomp(*(uint64_t*)b, cmpmpint)) == 0; } if(btag == T_INT64){ if(atag == T_UINT64) return (*(int64_t*)b == (int64_t)*(uint64_t*)a); if(atag == T_DOUBLE) return (*(int64_t*)b == (int64_t)*(double*)a); if(atag == T_MPINT) return mpcmp(*(mpint**)a, vtomp(*(int64_t*)b, cmpmpint)) == 0; } return 1; }