/
builtin.d
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/
builtin.d
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/**
* Implement CTFE for intrinsic (builtin) functions.
*
* Currently includes functions from `std.math`, `core.math` and `core.bitop`.
*
* Copyright: Copyright (C) 1999-2024 by The D Language Foundation, All Rights Reserved
* Authors: $(LINK2 https://www.digitalmars.com, Walter Bright)
* License: $(LINK2 https://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/builtin.d, _builtin.d)
* Documentation: https://dlang.org/phobos/dmd_builtin.html
* Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/builtin.d
*/
module dmd.builtin;
import dmd.arraytypes;
import dmd.astenums;
import dmd.dmangle;
import dmd.errors;
import dmd.expression;
import dmd.func;
import dmd.globals;
import dmd.location;
import dmd.mtype;
import dmd.root.ctfloat;
import dmd.tokens;
import dmd.id;
static import core.bitop;
/**********************************
* Determine if function is a builtin one that we can
* evaluate at compile time.
*/
public extern (C++) BUILTIN isBuiltin(FuncDeclaration fd)
{
if (fd.builtin == BUILTIN.unknown)
{
fd.builtin = determine_builtin(fd);
}
return fd.builtin;
}
/**************************************
* Evaluate builtin function.
* Return result; NULL if cannot evaluate it.
*/
public extern (C++) Expression eval_builtin(const ref Loc loc, FuncDeclaration fd, Expressions* arguments)
{
if (fd.builtin == BUILTIN.unimp)
return null;
switch (fd.builtin)
{
foreach(e; __traits(allMembers, BUILTIN))
{
static if (e == "unknown")
case BUILTIN.unknown: assert(false);
else
mixin("case BUILTIN."~e~": return eval_"~e~"(loc, fd, arguments);");
}
default: assert(0);
}
}
private:
/**
* Handler for evaluating builtins during CTFE.
*
* Params:
* loc = The call location, for error reporting.
* fd = The callee declaration, e.g. to disambiguate between different overloads
* in a single handler (LDC).
* arguments = The function call arguments.
* Returns:
* An Expression containing the return value of the call.
*/
BUILTIN determine_builtin(FuncDeclaration func)
{
auto fd = func.toAliasFunc();
if (fd.isDeprecated())
return BUILTIN.unimp;
auto m = fd.getModule();
if (!m || !m.md)
return BUILTIN.unimp;
const md = m.md;
// Look for core.math, core.bitop, std.math, and std.math.<package>
const id2 = (md.packages.length == 2) ? md.packages[1] : md.id;
if (id2 != Id.math && id2 != Id.bitop)
return BUILTIN.unimp;
if (md.packages.length != 1 && !(md.packages.length == 2 && id2 == Id.math))
return BUILTIN.unimp;
const id1 = md.packages[0];
if (id1 != Id.core && id1 != Id.std)
return BUILTIN.unimp;
const id3 = fd.ident;
if (id1 == Id.core && id2 == Id.bitop)
{
if (id3 == Id.bsf) return BUILTIN.bsf;
if (id3 == Id.bsr) return BUILTIN.bsr;
if (id3 == Id.bswap) return BUILTIN.bswap;
if (id3 == Id._popcnt) return BUILTIN.popcnt;
return BUILTIN.unimp;
}
// Math
if (id3 == Id.sin) return BUILTIN.sin;
if (id3 == Id.cos) return BUILTIN.cos;
if (id3 == Id.tan) return BUILTIN.tan;
if (id3 == Id.atan2) return BUILTIN.unimp; // N.B unimplmeneted
if (id3 == Id._sqrt) return BUILTIN.sqrt;
if (id3 == Id.fabs) return BUILTIN.fabs;
if (id3 == Id.exp) return BUILTIN.exp;
if (id3 == Id.expm1) return BUILTIN.expm1;
if (id3 == Id.exp2) return BUILTIN.exp2;
if (id3 == Id.yl2x) return CTFloat.yl2x_supported ? BUILTIN.yl2x : BUILTIN.unimp;
if (id3 == Id.yl2xp1) return CTFloat.yl2xp1_supported ? BUILTIN.yl2xp1 : BUILTIN.unimp;
if (id3 == Id.log) return BUILTIN.log;
if (id3 == Id.log2) return BUILTIN.log2;
if (id3 == Id.log10) return BUILTIN.log10;
if (id3 == Id.ldexp) return BUILTIN.ldexp;
if (id3 == Id.round) return BUILTIN.round;
if (id3 == Id.floor) return BUILTIN.floor;
if (id3 == Id.ceil) return BUILTIN.ceil;
if (id3 == Id.trunc) return BUILTIN.trunc;
if (id3 == Id.fmin) return BUILTIN.fmin;
if (id3 == Id.fmax) return BUILTIN.fmax;
if (id3 == Id.fma) return BUILTIN.fma;
if (id3 == Id.copysign) return BUILTIN.copysign;
if (id3 == Id.isnan) return BUILTIN.isnan;
if (id3 == Id.isInfinity) return BUILTIN.isinfinity;
if (id3 == Id.isfinite) return BUILTIN.isfinite;
// Only match pow(fp,fp) where fp is a floating point type
if (id3 == Id._pow)
{
if ((*fd.parameters)[0].type.isfloating() &&
(*fd.parameters)[1].type.isfloating())
return BUILTIN.pow;
return BUILTIN.unimp;
}
if (id3 != Id.toPrec)
return BUILTIN.unimp;
const(char)* me = mangleExact(fd);
final switch (me["_D4core4math__T6toPrecHT".length])
{
case 'd': return BUILTIN.toPrecDouble;
case 'e': return BUILTIN.toPrecReal;
case 'f': return BUILTIN.toPrecFloat;
}
}
Expression eval_unimp(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
return null;
}
Expression eval_sin(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.sin(arg0.toReal()), arg0.type);
}
Expression eval_cos(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.cos(arg0.toReal()), arg0.type);
}
Expression eval_tan(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.tan(arg0.toReal()), arg0.type);
}
Expression eval_sqrt(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.sqrt(arg0.toReal()), arg0.type);
}
Expression eval_fabs(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.fabs(arg0.toReal()), arg0.type);
}
Expression eval_ldexp(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == EXP.int64);
return new RealExp(loc, CTFloat.ldexp(arg0.toReal(), cast(int) arg1.toInteger()), arg0.type);
}
Expression eval_log(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.log(arg0.toReal()), arg0.type);
}
Expression eval_log2(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.log2(arg0.toReal()), arg0.type);
}
Expression eval_log10(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.log10(arg0.toReal()), arg0.type);
}
Expression eval_exp(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.exp(arg0.toReal()), arg0.type);
}
Expression eval_expm1(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.expm1(arg0.toReal()), arg0.type);
}
Expression eval_exp2(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.exp2(arg0.toReal()), arg0.type);
}
Expression eval_round(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.round(arg0.toReal()), arg0.type);
}
Expression eval_floor(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.floor(arg0.toReal()), arg0.type);
}
Expression eval_ceil(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.ceil(arg0.toReal()), arg0.type);
}
Expression eval_trunc(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return new RealExp(loc, CTFloat.trunc(arg0.toReal()), arg0.type);
}
Expression eval_copysign(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == EXP.float64);
return new RealExp(loc, CTFloat.copysign(arg0.toReal(), arg1.toReal()), arg0.type);
}
Expression eval_pow(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == EXP.float64);
return new RealExp(loc, CTFloat.pow(arg0.toReal(), arg1.toReal()), arg0.type);
}
Expression eval_fmin(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == EXP.float64);
return new RealExp(loc, CTFloat.fmin(arg0.toReal(), arg1.toReal()), arg0.type);
}
Expression eval_fmax(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == EXP.float64);
return new RealExp(loc, CTFloat.fmax(arg0.toReal(), arg1.toReal()), arg0.type);
}
Expression eval_fma(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == EXP.float64);
Expression arg2 = (*arguments)[2];
assert(arg2.op == EXP.float64);
return new RealExp(loc, CTFloat.fma(arg0.toReal(), arg1.toReal(), arg2.toReal()), arg0.type);
}
Expression eval_isnan(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return IntegerExp.createBool(CTFloat.isNaN(arg0.toReal()));
}
Expression eval_isinfinity(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
return IntegerExp.createBool(CTFloat.isInfinity(arg0.toReal()));
}
Expression eval_isfinite(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
const value = !CTFloat.isNaN(arg0.toReal()) && !CTFloat.isInfinity(arg0.toReal());
return IntegerExp.createBool(value);
}
Expression eval_bsf(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.int64);
uinteger_t n = arg0.toInteger();
if (n == 0)
error(loc, "`bsf(0)` is undefined");
return new IntegerExp(loc, core.bitop.bsf(n), Type.tint32);
}
Expression eval_bsr(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.int64);
uinteger_t n = arg0.toInteger();
if (n == 0)
error(loc, "`bsr(0)` is undefined");
return new IntegerExp(loc, core.bitop.bsr(n), Type.tint32);
}
Expression eval_bswap(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.int64);
uinteger_t n = arg0.toInteger();
TY ty = arg0.type.toBasetype().ty;
if (ty == Tint64 || ty == Tuns64)
return new IntegerExp(loc, core.bitop.bswap(cast(ulong) n), arg0.type);
else
return new IntegerExp(loc, core.bitop.bswap(cast(uint) n), arg0.type);
}
Expression eval_popcnt(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.int64);
uinteger_t n = arg0.toInteger();
return new IntegerExp(loc, core.bitop.popcnt(n), Type.tint32);
}
Expression eval_yl2x(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == EXP.float64);
const x = arg0.toReal();
const y = arg1.toReal();
real_t result = CTFloat.zero;
CTFloat.yl2x(&x, &y, &result);
return new RealExp(loc, result, arg0.type);
}
Expression eval_yl2xp1(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == EXP.float64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == EXP.float64);
const x = arg0.toReal();
const y = arg1.toReal();
real_t result = CTFloat.zero;
CTFloat.yl2xp1(&x, &y, &result);
return new RealExp(loc, result, arg0.type);
}
Expression eval_toPrecFloat(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
float f = cast(real)arg0.toReal();
return new RealExp(loc, real_t(f), Type.tfloat32);
}
Expression eval_toPrecDouble(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
double d = cast(real)arg0.toReal();
return new RealExp(loc, real_t(d), Type.tfloat64);
}
Expression eval_toPrecReal(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
return new RealExp(loc, arg0.toReal(), Type.tfloat80);
}
// These built-ins are reserved for GDC and LDC.
Expression eval_gcc(Loc, FuncDeclaration, Expressions*)
{
assert(0);
}
Expression eval_llvm(Loc, FuncDeclaration, Expressions*)
{
assert(0);
}