mozilla
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moz-skia
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moz-skia/forth/StdWords.cpp

457 строки
11 KiB
C++
Исходник Ответственный История

#include "Forth.h"
#include "ForthParser.h"
#include "SkString.h"
#define BEGIN_WORD(name) \
class name##_ForthWord : public ForthWord { \
public: \
virtual void exec(ForthEngine* fe)
#define END_WORD };
///////////////////////////////////////////////////////////////////////////////
BEGIN_WORD(drop) {
(void)fe->pop();
} END_WORD
BEGIN_WORD(over) {
fe->push(fe->peek(1));
} END_WORD
BEGIN_WORD(dup) {
fe->push(fe->top());
} END_WORD
BEGIN_WORD(swap) {
intptr_t a = fe->pop();
intptr_t b = fe->top();
fe->setTop(a);
fe->push(b);
} END_WORD
BEGIN_WORD(rot) {
intptr_t c = fe->pop();
intptr_t b = fe->pop();
intptr_t a = fe->pop();
fe->push(b);
fe->push(c);
fe->push(a);
} END_WORD
BEGIN_WORD(rrot) {
intptr_t c = fe->pop();
intptr_t b = fe->pop();
intptr_t a = fe->pop();
fe->push(c);
fe->push(a);
fe->push(b);
} END_WORD
BEGIN_WORD(swap2) {
intptr_t d = fe->pop();
intptr_t c = fe->pop();
intptr_t b = fe->pop();
intptr_t a = fe->pop();
fe->push(c);
fe->push(d);
fe->push(a);
fe->push(b);
} END_WORD
BEGIN_WORD(dup2) {
fe->push(fe->peek(1));
fe->push(fe->peek(1));
} END_WORD
BEGIN_WORD(over2) {
fe->push(fe->peek(3));
fe->push(fe->peek(3));
} END_WORD
BEGIN_WORD(drop2) {
(void)fe->pop();
(void)fe->pop();
} END_WORD
///////////////// logicals
BEGIN_WORD(logical_and) {
intptr_t tmp = fe->pop();
fe->setTop(-(tmp && fe->top()));
} END_WORD
BEGIN_WORD(logical_or) {
intptr_t tmp = fe->pop();
fe->setTop(-(tmp || fe->top()));
} END_WORD
BEGIN_WORD(logical_not) {
fe->setTop(-(!fe->top()));
} END_WORD
BEGIN_WORD(if_dup) {
intptr_t tmp = fe->top();
if (tmp) {
fe->push(tmp);
}
} END_WORD
///////////////// ints
class add_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(fe->top() + tmp);
}};
class sub_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(fe->top() - tmp);
}};
class mul_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(fe->top() * tmp);
}};
class div_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(fe->top() / tmp);
}};
class mod_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(fe->top() % tmp);
}};
class divmod_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t denom = fe->pop();
intptr_t numer = fe->pop();
fe->push(numer % denom);
fe->push(numer / denom);
}};
class dot_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
SkString str;
str.printf("%d ", fe->pop());
fe->sendOutput(str.c_str());
}};
class abs_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
int32_t value = fe->top();
if (value < 0) {
fe->setTop(-value);
}
}};
class negate_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
fe->setTop(-fe->top());
}};
class min_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
int32_t value = fe->pop();
if (value < fe->top()) {
fe->setTop(value);
}
}};
class max_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
int32_t value = fe->pop();
if (value > fe->top()) {
fe->setTop(value);
}
}
};
///////////////// floats
class fadd_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
float tmp = fe->fpop();
fe->fsetTop(fe->ftop() + tmp);
}
};
class fsub_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
float tmp = fe->fpop();
fe->fsetTop(fe->ftop() - tmp);
}
};
class fmul_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
float tmp = fe->fpop();
fe->fsetTop(fe->ftop() * tmp);
}
};
class fdiv_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
float tmp = fe->fpop();
fe->fsetTop(fe->ftop() / tmp);
}
};
class fdot_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
SkString str;
str.printf("%g ", fe->fpop());
fe->sendOutput(str.c_str());
}
};
class fabs_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
float value = fe->ftop();
if (value < 0) {
fe->fsetTop(-value);
}
}
};
class fmin_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
float value = fe->fpop();
if (value < fe->ftop()) {
fe->fsetTop(value);
}
}
};
class fmax_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
float value = fe->fpop();
if (value > fe->ftop()) {
fe->fsetTop(value);
}
}
};
class floor_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
fe->fsetTop(floorf(fe->ftop()));
}
};
class ceil_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
fe->fsetTop(ceilf(fe->ftop()));
}
};
class round_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
fe->fsetTop(floorf(fe->ftop() + 0.5f));
}
};
class f2i_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
fe->setTop((int)fe->ftop());
}
};
class i2f_ForthWord : public ForthWord {
public:
virtual void exec(ForthEngine* fe) {
fe->fsetTop((float)fe->top());
}
};
////////////////////////////// int compares
class eq_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
fe->push(-(fe->pop() == fe->pop()));
}
};
class neq_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
fe->push(-(fe->pop() != fe->pop()));
}
};
class lt_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(-(fe->top() < tmp));
}
};
class le_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(-(fe->top() <= tmp));
}
};
class gt_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(-(fe->top() > tmp));
}
};
class ge_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
intptr_t tmp = fe->pop();
fe->setTop(-(fe->top() >= tmp));
}
};
BEGIN_WORD(lt0) {
fe->setTop(fe->top() >> 31);
} END_WORD
BEGIN_WORD(ge0) {
fe->setTop(~(fe->top() >> 31));
} END_WORD
BEGIN_WORD(gt0) {
fe->setTop(-(fe->top() > 0));
} END_WORD
BEGIN_WORD(le0) {
fe->setTop(-(fe->top() <= 0));
} END_WORD
/////////////////////////////// float compares
/* negative zero is our nemesis, otherwise we could use = and <> from ints */
class feq_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
fe->push(-(fe->fpop() == fe->fpop()));
}
};
class fneq_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
fe->push(-(fe->fpop() != fe->fpop()));
}
};
class flt_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
float tmp = fe->fpop();
fe->setTop(-(fe->ftop() < tmp));
}
};
class fle_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
float tmp = fe->fpop();
fe->setTop(-(fe->ftop() <= tmp));
}
};
class fgt_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
float tmp = fe->fpop();
fe->setTop(-(fe->ftop() > tmp));
}
};
class fge_ForthWord : public ForthWord { public:
virtual void exec(ForthEngine* fe) {
float tmp = fe->fpop();
fe->setTop(-(fe->ftop() >= tmp));
}
};
///////////////////////////////////////////////////////////////////////////////
#define ADD_LITERAL_WORD(sym, name) \
this->add(sym, sizeof(sym)-1, new name##_ForthWord)
void ForthParser::addStdWords() {
ADD_LITERAL_WORD("DROP", drop);
ADD_LITERAL_WORD("DUP", dup);
ADD_LITERAL_WORD("SWAP", swap);
ADD_LITERAL_WORD("OVER", over);
ADD_LITERAL_WORD("ROT", rot);
ADD_LITERAL_WORD("-ROT", rrot);
ADD_LITERAL_WORD("2SWAP", swap2);
ADD_LITERAL_WORD("2DUP", dup2);
ADD_LITERAL_WORD("2OVER", over2);
ADD_LITERAL_WORD("2DROP", drop2);
ADD_LITERAL_WORD("+", add);
ADD_LITERAL_WORD("-", sub);
ADD_LITERAL_WORD("*", mul);
ADD_LITERAL_WORD("/", div);
ADD_LITERAL_WORD("MOD", mod);
ADD_LITERAL_WORD("/MOD", divmod);
ADD_LITERAL_WORD(".", dot);
ADD_LITERAL_WORD("ABS", abs);
ADD_LITERAL_WORD("NEGATE", negate);
ADD_LITERAL_WORD("MIN", min);
ADD_LITERAL_WORD("MAX", max);
ADD_LITERAL_WORD("AND", logical_and);
ADD_LITERAL_WORD("OR", logical_or);
ADD_LITERAL_WORD("0=", logical_not);
ADD_LITERAL_WORD("?DUP", if_dup);
this->add("f+", 2, new fadd_ForthWord);
this->add("f-", 2, new fsub_ForthWord);
this->add("f*", 2, new fmul_ForthWord);
this->add("f/", 2, new fdiv_ForthWord);
this->add("f.", 2, new fdot_ForthWord);
this->add("fabs", 4, new fabs_ForthWord);
this->add("fmin", 4, new fmin_ForthWord);
this->add("fmax", 4, new fmax_ForthWord);
this->add("fmax", 4, new fmax_ForthWord);
this->add("floor", 5, new floor_ForthWord);
this->add("ceil", 4, new ceil_ForthWord);
this->add("round", 5, new round_ForthWord);
this->add("f>i", 3, new f2i_ForthWord);
this->add("i>f", 3, new i2f_ForthWord);
this->add("=", 1, new eq_ForthWord);
this->add("<>", 2, new neq_ForthWord);
this->add("<", 1, new lt_ForthWord);
this->add("<=", 2, new le_ForthWord);
this->add(">", 1, new gt_ForthWord);
this->add(">=", 2, new ge_ForthWord);
ADD_LITERAL_WORD("0<", lt0);
ADD_LITERAL_WORD("0>", gt0);
ADD_LITERAL_WORD("0<=", le0);
ADD_LITERAL_WORD("0>=", ge0);
this->add("f=", 2, new feq_ForthWord);
this->add("f<>", 3, new fneq_ForthWord);
this->add("f<", 2, new flt_ForthWord);
this->add("f<=", 3, new fle_ForthWord);
this->add("f>", 2, new fgt_ForthWord);
this->add("f>=", 3, new fge_ForthWord);
}
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