/
builtin.d
364 lines (334 loc) · 12.9 KB
/
builtin.d
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/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (c) 1999-2017 by Digital Mars, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/ddmd/builtin.d, _builtin.d)
*/
module ddmd.builtin;
// Online documentation: https://dlang.org/phobos/ddmd_builtin.html
import core.stdc.math;
import core.stdc.string;
import ddmd.arraytypes;
import ddmd.dmangle;
import ddmd.errors;
import ddmd.expression;
import ddmd.func;
import ddmd.globals;
import ddmd.mtype;
import ddmd.root.ctfloat;
import ddmd.root.stringtable;
import ddmd.tokens;
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.
*/
extern (C++) alias builtin_fp = Expression function(Loc loc, FuncDeclaration fd, Expressions* arguments);
__gshared StringTable builtins;
public extern (C++) void add_builtin(const(char)* mangle, builtin_fp fp)
{
builtins.insert(mangle, strlen(mangle), cast(void*)fp);
}
builtin_fp builtin_lookup(const(char)* mangle)
{
if (const sv = builtins.lookup(mangle, strlen(mangle)))
return cast(builtin_fp)sv.ptrvalue;
return null;
}
extern (C++) Expression eval_unimp(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
return null;
}
extern (C++) Expression eval_sin(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, CTFloat.sin(arg0.toReal()), arg0.type);
}
extern (C++) Expression eval_cos(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, CTFloat.cos(arg0.toReal()), arg0.type);
}
extern (C++) Expression eval_tan(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, CTFloat.tan(arg0.toReal()), arg0.type);
}
extern (C++) Expression eval_sqrt(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, CTFloat.sqrt(arg0.toReal()), arg0.type);
}
extern (C++) Expression eval_fabs(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, CTFloat.fabs(arg0.toReal()), arg0.type);
}
extern (C++) Expression eval_ldexp(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == TOKint64);
return new RealExp(loc, CTFloat.ldexp(arg0.toReal(), cast(int) arg1.toInteger()), arg0.type);
}
extern (C++) Expression eval_isnan(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new IntegerExp(loc, CTFloat.isNaN(arg0.toReal()), Type.tbool);
}
extern (C++) Expression eval_isinfinity(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new IntegerExp(loc, CTFloat.isInfinity(arg0.toReal()), Type.tbool);
}
extern (C++) Expression eval_isfinite(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
const value = !CTFloat.isNaN(arg0.toReal()) && !CTFloat.isInfinity(arg0.toReal());
return new IntegerExp(loc, value, Type.tbool);
}
extern (C++) Expression eval_bsf(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKint64);
uinteger_t n = arg0.toInteger();
if (n == 0)
error(loc, "bsf(0) is undefined");
n = (n ^ (n - 1)) >> 1; // convert trailing 0s to 1, and zero rest
int k = 0;
while (n)
{
++k;
n >>= 1;
}
return new IntegerExp(loc, k, Type.tint32);
}
extern (C++) Expression eval_bsr(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKint64);
uinteger_t n = arg0.toInteger();
if (n == 0)
error(loc, "bsr(0) is undefined");
int k = 0;
while (n >>= 1)
{
++k;
}
return new IntegerExp(loc, k, Type.tint32);
}
extern (C++) Expression eval_bswap(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKint64);
uinteger_t n = arg0.toInteger();
enum BYTEMASK = 0x00FF00FF00FF00FFL;
enum SHORTMASK = 0x0000FFFF0000FFFFL;
enum INTMASK = 0x0000FFFF0000FFFFL;
// swap adjacent ubytes
n = ((n >> 8) & BYTEMASK) | ((n & BYTEMASK) << 8);
// swap adjacent ushorts
n = ((n >> 16) & SHORTMASK) | ((n & SHORTMASK) << 16);
TY ty = arg0.type.toBasetype().ty;
// If 64 bits, we need to swap high and low uints
if (ty == Tint64 || ty == Tuns64)
n = ((n >> 32) & INTMASK) | ((n & INTMASK) << 32);
return new IntegerExp(loc, n, arg0.type);
}
extern (C++) Expression eval_popcnt(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKint64);
uinteger_t n = arg0.toInteger();
int cnt = 0;
while (n)
{
cnt += (n & 1);
n >>= 1;
}
return new IntegerExp(loc, cnt, arg0.type);
}
extern (C++) Expression eval_yl2x(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == TOKfloat64);
const x = arg0.toReal();
const y = arg1.toReal();
real_t result = 0;
CTFloat.yl2x(&x, &y, &result);
return new RealExp(loc, result, arg0.type);
}
extern (C++) Expression eval_yl2xp1(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == TOKfloat64);
const x = arg0.toReal();
const y = arg1.toReal();
real_t result = 0;
CTFloat.yl2xp1(&x, &y, &result);
return new RealExp(loc, result, arg0.type);
}
public extern (C++) void builtin_init()
{
builtins._init(47);
// @safe @nogc pure nothrow real function(real)
add_builtin("_D4core4math3sinFNaNbNiNfeZe", &eval_sin);
add_builtin("_D4core4math3cosFNaNbNiNfeZe", &eval_cos);
add_builtin("_D4core4math3tanFNaNbNiNfeZe", &eval_tan);
add_builtin("_D4core4math4sqrtFNaNbNiNfeZe", &eval_sqrt);
add_builtin("_D4core4math4fabsFNaNbNiNfeZe", &eval_fabs);
add_builtin("_D4core4math5expm1FNaNbNiNfeZe", &eval_unimp);
add_builtin("_D4core4math4exp21FNaNbNiNfeZe", &eval_unimp);
// @trusted @nogc pure nothrow real function(real)
add_builtin("_D4core4math3sinFNaNbNiNeeZe", &eval_sin);
add_builtin("_D4core4math3cosFNaNbNiNeeZe", &eval_cos);
add_builtin("_D4core4math3tanFNaNbNiNeeZe", &eval_tan);
add_builtin("_D4core4math4sqrtFNaNbNiNeeZe", &eval_sqrt);
add_builtin("_D4core4math4fabsFNaNbNiNeeZe", &eval_fabs);
add_builtin("_D4core4math5expm1FNaNbNiNeeZe", &eval_unimp);
add_builtin("_D4core4math4exp21FNaNbNiNeeZe", &eval_unimp);
// @safe @nogc pure nothrow double function(double)
add_builtin("_D4core4math4sqrtFNaNbNiNfdZd", &eval_sqrt);
// @safe @nogc pure nothrow float function(float)
add_builtin("_D4core4math4sqrtFNaNbNiNffZf", &eval_sqrt);
// @safe @nogc pure nothrow real function(real, real)
add_builtin("_D4core4math5atan2FNaNbNiNfeeZe", &eval_unimp);
if (CTFloat.yl2x_supported)
{
add_builtin("_D4core4math4yl2xFNaNbNiNfeeZe", &eval_yl2x);
}
else
{
add_builtin("_D4core4math4yl2xFNaNbNiNfeeZe", &eval_unimp);
}
if (CTFloat.yl2xp1_supported)
{
add_builtin("_D4core4math6yl2xp1FNaNbNiNfeeZe", &eval_yl2xp1);
}
else
{
add_builtin("_D4core4math6yl2xp1FNaNbNiNfeeZe", &eval_unimp);
}
// @safe @nogc pure nothrow long function(real)
add_builtin("_D4core4math6rndtolFNaNbNiNfeZl", &eval_unimp);
// @safe @nogc pure nothrow real function(real)
add_builtin("_D3std4math3sinFNaNbNiNfeZe", &eval_sin);
add_builtin("_D3std4math3cosFNaNbNiNfeZe", &eval_cos);
add_builtin("_D3std4math3tanFNaNbNiNfeZe", &eval_tan);
add_builtin("_D3std4math4sqrtFNaNbNiNfeZe", &eval_sqrt);
add_builtin("_D3std4math4fabsFNaNbNiNfeZe", &eval_fabs);
add_builtin("_D3std4math5expm1FNaNbNiNfeZe", &eval_unimp);
add_builtin("_D3std4math4exp21FNaNbNiNfeZe", &eval_unimp);
// @trusted @nogc pure nothrow real function(real)
add_builtin("_D3std4math3sinFNaNbNiNeeZe", &eval_sin);
add_builtin("_D3std4math3cosFNaNbNiNeeZe", &eval_cos);
add_builtin("_D3std4math3tanFNaNbNiNeeZe", &eval_tan);
add_builtin("_D3std4math4sqrtFNaNbNiNeeZe", &eval_sqrt);
add_builtin("_D3std4math4fabsFNaNbNiNeeZe", &eval_fabs);
add_builtin("_D3std4math5expm1FNaNbNiNeeZe", &eval_unimp);
add_builtin("_D3std4math4exp21FNaNbNiNeeZe", &eval_unimp);
// @safe @nogc pure nothrow double function(double)
add_builtin("_D3std4math4sqrtFNaNbNiNfdZd", &eval_sqrt);
// @safe @nogc pure nothrow float function(float)
add_builtin("_D3std4math4sqrtFNaNbNiNffZf", &eval_sqrt);
// @safe @nogc pure nothrow real function(real, real)
add_builtin("_D3std4math5atan2FNaNbNiNfeeZe", &eval_unimp);
if (CTFloat.yl2x_supported)
{
add_builtin("_D3std4math4yl2xFNaNbNiNfeeZe", &eval_yl2x);
}
else
{
add_builtin("_D3std4math4yl2xFNaNbNiNfeeZe", &eval_unimp);
}
if (CTFloat.yl2xp1_supported)
{
add_builtin("_D3std4math6yl2xp1FNaNbNiNfeeZe", &eval_yl2xp1);
}
else
{
add_builtin("_D3std4math6yl2xp1FNaNbNiNfeeZe", &eval_unimp);
}
// @safe @nogc pure nothrow long function(real)
add_builtin("_D3std4math6rndtolFNaNbNiNfeZl", &eval_unimp);
// @safe @nogc pure nothrow T function(T, int)
add_builtin("_D4core4math5ldexpFNaNbNiNfeiZe", &eval_ldexp);
add_builtin("_D3std4math5ldexpFNaNbNiNfeiZe", &eval_ldexp);
add_builtin("_D3std4math5ldexpFNaNbNiNfdiZd", &eval_ldexp);
add_builtin("_D3std4math5ldexpFNaNbNiNffiZf", &eval_ldexp);
// @trusted @nogc pure nothrow bool function(T)
add_builtin("_D3std4math12__T5isNaNTeZ5isNaNFNaNbNiNeeZb", &eval_isnan);
add_builtin("_D3std4math12__T5isNaNTdZ5isNaNFNaNbNiNedZb", &eval_isnan);
add_builtin("_D3std4math12__T5isNaNTfZ5isNaNFNaNbNiNefZb", &eval_isnan);
add_builtin("_D3std4math18__T10isInfinityTeZ10isInfinityFNaNbNiNeeZb", &eval_isinfinity);
add_builtin("_D3std4math18__T10isInfinityTdZ10isInfinityFNaNbNiNedZb", &eval_isinfinity);
add_builtin("_D3std4math18__T10isInfinityTfZ10isInfinityFNaNbNiNefZb", &eval_isinfinity);
add_builtin("_D3std4math15__T8isFiniteTeZ8isFiniteFNaNbNiNeeZb", &eval_isfinite);
add_builtin("_D3std4math15__T8isFiniteTdZ8isFiniteFNaNbNiNedZb", &eval_isfinite);
add_builtin("_D3std4math15__T8isFiniteTfZ8isFiniteFNaNbNiNefZb", &eval_isfinite);
// @safe @nogc pure nothrow int function(uint)
add_builtin("_D4core5bitop3bsfFNaNbNiNfkZi", &eval_bsf);
add_builtin("_D4core5bitop3bsrFNaNbNiNfkZi", &eval_bsr);
// @safe @nogc pure nothrow int function(ulong)
add_builtin("_D4core5bitop3bsfFNaNbNiNfmZi", &eval_bsf);
add_builtin("_D4core5bitop3bsrFNaNbNiNfmZi", &eval_bsr);
// @safe @nogc pure nothrow uint function(uint)
add_builtin("_D4core5bitop5bswapFNaNbNiNfkZk", &eval_bswap);
// @safe @nogc pure nothrow int function(uint)
add_builtin("_D4core5bitop7_popcntFNaNbNiNfkZi", &eval_popcnt);
// @safe @nogc pure nothrow ushort function(ushort)
add_builtin("_D4core5bitop7_popcntFNaNbNiNftZt", &eval_popcnt);
// @safe @nogc pure nothrow int function(ulong)
if (global.params.is64bit)
add_builtin("_D4core5bitop7_popcntFNaNbNiNfmZi", &eval_popcnt);
}
/**********************************
* Determine if function is a builtin one that we can
* evaluate at compile time.
*/
public extern (C++) BUILTIN isBuiltin(FuncDeclaration fd)
{
if (fd.builtin == BUILTINunknown)
{
builtin_fp fp = builtin_lookup(mangleExact(fd));
fd.builtin = fp ? BUILTINyes : BUILTINno;
}
return fd.builtin;
}
/**************************************
* Evaluate builtin function.
* Return result; NULL if cannot evaluate it.
*/
public extern (C++) Expression eval_builtin(Loc loc, FuncDeclaration fd, Expressions* arguments)
{
if (fd.builtin == BUILTINyes)
{
builtin_fp fp = builtin_lookup(mangleExact(fd));
assert(fp);
return fp(loc, fd, arguments);
}
return null;
}