ldc/ddmd/builtin.d
2016-05-29 18:19:53 +02:00

668 lines
22 KiB
D

// Compiler implementation of the D programming language
// Copyright (c) 1999-2015 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
module ddmd.builtin;
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.port;
import ddmd.root.stringtable;
import ddmd.tokens;
version(IN_LLVM) {
import ddmd.dtemplate;
}
private:
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)).ptrvalue = cast(void*)fp;
}
builtin_fp builtin_lookup(const(char)* mangle)
{
if (StringValue* 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, sinl(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, cosl(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, tanl(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, Port.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, fabsl(arg0.toReal()), arg0.type);
}
version(IN_LLVM)
{
private Type getTypeOfOverloadedIntrinsic(FuncDeclaration fd)
{
// Depending on the state of the code generation we have to look at
// the template instance or the function declaration.
assert(fd.parent && "function declaration requires parent");
TemplateInstance tinst = fd.parent.isTemplateInstance();
if (tinst)
{
// See DtoOverloadedIntrinsicName
assert(tinst.tdtypes.dim == 1);
return cast(Type) tinst.tdtypes.data[0];
}
else
{
assert(fd.type.ty == Tfunction);
TypeFunction tf = cast(TypeFunction) fd.type;
assert(tf.parameters.dim >= 1);
return tf.parameters.data[0].type;
}
}
private int getBitsizeOfType(Loc loc, Type type)
{
switch (type.toBasetype().ty)
{
case Tint64:
case Tuns64: return 64;
case Tint32:
case Tuns32: return 32;
case Tint16:
case Tuns16: return 16;
case Tint128:
case Tuns128:
error(loc, "cent/ucent not supported");
break;
default:
error(loc, "unsupported type");
break;
}
return 32; // in case of error
}
extern (C++) Expression eval_llvmsin(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, sinl(arg0.toReal()), type);
}
extern (C++) Expression eval_llvmcos(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, cosl(arg0.toReal()), type);
}
extern (C++) Expression eval_llvmsqrt(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, sqrtl(arg0.toReal()), type);
}
extern (C++) Expression eval_llvmlog(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, logl(arg0.toReal()), type);
}
extern (C++) Expression eval_llvmfabs(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, fabsl(arg0.toReal()), type);
}
extern (C++) Expression eval_llvmminnum(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == TOKfloat64);
return new RealExp(loc, fminl(arg0.toReal(), arg1.toReal()), type);
}
extern (C++) Expression eval_llvmmaxnum(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
Expression arg1 = (*arguments)[1];
assert(arg1.op == TOKfloat64);
return new RealExp(loc, fmaxl(arg0.toReal(), arg1.toReal()), type);
}
extern (C++) Expression eval_llvmfloor(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, floor(arg0.toReal()), type);
}
extern (C++) Expression eval_llvmceil(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, ceil(arg0.toReal()), type);
}
extern (C++) Expression eval_llvmtrunc(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, trunc(arg0.toReal()), type);
}
extern (C++) Expression eval_llvmround(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKfloat64);
return new RealExp(loc, round(arg0.toReal()), type);
}
extern (C++) Expression eval_cttz(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKint64);
uinteger_t x = arg0.toInteger();
int n = getBitsizeOfType(loc, type);
if (x == 0)
{
if ((*arguments)[1].toInteger())
error(loc, "llvm.cttz.i#(0) is undefined");
}
else
{
int c = n >> 1;
n -= 1;
const uinteger_t mask = (uinteger_t(1L) << n) | (uinteger_t(1L) << n)-1;
do {
uinteger_t y = (x << c) & mask;
if (y != 0) { n -= c; x = y; }
c = c >> 1;
} while (c != 0);
}
return new IntegerExp(loc, n, type);
}
extern (C++) Expression eval_ctlz(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKint64);
uinteger_t x = arg0.toInteger();
if (x == 0 && (*arguments)[1].toInteger())
error(loc, "llvm.ctlz.i#(0) is undefined");
int n = getBitsizeOfType(loc, type);
int c = n >> 1;
do {
uinteger_t y = x >> c; if (y != 0) { n -= c; x = y; }
c = c >> 1;
} while (c != 0);
return new IntegerExp(loc, n - x, type);
}
extern (C++) Expression eval_bswap(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
Type type = getTypeOfOverloadedIntrinsic(fd);
Expression arg0 = (*arguments)[0];
assert(arg0.op == TOKint64);
uinteger_t n = arg0.toInteger();
enum ulong BYTEMASK = 0x00FF00FF00FF00FF;
enum ulong SHORTMASK = 0x0000FFFF0000FFFF;
enum ulong INTMASK = 0x00000000FFFFFFFF;
switch (type.toBasetype().ty)
{
case Tint64:
case Tuns64:
// swap high and low uints
n = ((n >> 32) & INTMASK) | ((n & INTMASK) << 32);
goto case Tuns32;
case Tint32:
case Tuns32:
// swap adjacent ushorts
n = ((n >> 16) & SHORTMASK) | ((n & SHORTMASK) << 16);
goto case Tuns16;
case Tint16:
case Tuns16:
// swap adjacent ubytes
n = ((n >> 8 ) & BYTEMASK) | ((n & BYTEMASK) << 8 );
break;
case Tint128:
case Tuns128:
error(loc, "cent/ucent not supported");
break;
default:
error(loc, "unsupported type");
break;
}
return new IntegerExp(loc, n, type);
}
extern (C++) Expression eval_ctpop(Loc loc, FuncDeclaration fd, Expressions *arguments)
{
// FIXME Does not work for cent/ucent
Type type = getTypeOfOverloadedIntrinsic(fd);
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, type);
}
} // IN_LLVM
else
{ // !IN_LLVM
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);
}
} // !IN_LLVM
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);
real x = arg0.toReal();
real y = arg1.toReal();
real result;
Port.yl2x_impl(&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);
real x = arg0.toReal();
real y = arg1.toReal();
real result;
Port.yl2xp1_impl(&x, &y, &result);
return new RealExp(loc, result, arg0.type);
}
public extern (C++) void builtin_init()
{
version(IN_LLVM)
{
builtins._init(127); // Prime number like default value
}
else
{
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 (Port.yl2x_supported)
{
add_builtin("_D4core4math4yl2xFNaNbNiNfeeZe", &eval_yl2x);
}
else
{
add_builtin("_D4core4math4yl2xFNaNbNiNfeeZe", &eval_unimp);
}
if (Port.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 (Port.yl2x_supported)
{
add_builtin("_D3std4math4yl2xFNaNbNiNfeeZe", &eval_yl2x);
}
else
{
add_builtin("_D3std4math4yl2xFNaNbNiNfeeZe", &eval_unimp);
}
if (Port.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);
version(IN_LLVM)
{
// intrinsic llvm.sin.f32/f64/f80/f128/ppcf128
add_builtin("llvm.sin.f32", &eval_llvmsin);
add_builtin("llvm.sin.f64", &eval_llvmsin);
add_builtin("llvm.sin.f80", &eval_llvmsin);
add_builtin("llvm.sin.f128", &eval_llvmsin);
add_builtin("llvm.sin.ppcf128", &eval_llvmsin);
// intrinsic llvm.cos.f32/f64/f80/f128/ppcf128
add_builtin("llvm.cos.f32", &eval_llvmcos);
add_builtin("llvm.cos.f64", &eval_llvmcos);
add_builtin("llvm.cos.f80", &eval_llvmcos);
add_builtin("llvm.cos.f128", &eval_llvmcos);
add_builtin("llvm.cos.ppcf128", &eval_llvmcos);
// intrinsic llvm.sqrt.f32/f64/f80/f128/ppcf128
add_builtin("llvm.sqrt.f32", &eval_llvmsqrt);
add_builtin("llvm.sqrt.f64", &eval_llvmsqrt);
add_builtin("llvm.sqrt.f80", &eval_llvmsqrt);
add_builtin("llvm.sqrt.f128", &eval_llvmsqrt);
add_builtin("llvm.sqrt.ppcf128", &eval_llvmsqrt);
// intrinsic llvm.log.f32/f64/f80/f128/ppcf128
add_builtin("llvm.log.f32", &eval_llvmlog);
add_builtin("llvm.log.f64", &eval_llvmlog);
add_builtin("llvm.log.f80", &eval_llvmlog);
add_builtin("llvm.log.f128", &eval_llvmlog);
add_builtin("llvm.log.ppcf128", &eval_llvmlog);
// intrinsic llvm.fabs.f32/f64/f80/f128/ppcf128
add_builtin("llvm.fabs.f32", &eval_llvmfabs);
add_builtin("llvm.fabs.f64", &eval_llvmfabs);
add_builtin("llvm.fabs.f80", &eval_llvmfabs);
add_builtin("llvm.fabs.f128", &eval_llvmfabs);
add_builtin("llvm.fabs.ppcf128", &eval_llvmfabs);
// intrinsic llvm.minnum.f32/f64/f80/f128/ppcf128
add_builtin("llvm.minnum.f32", &eval_llvmminnum);
add_builtin("llvm.minnum.f64", &eval_llvmminnum);
add_builtin("llvm.minnum.f80", &eval_llvmminnum);
add_builtin("llvm.minnum.f128", &eval_llvmminnum);
add_builtin("llvm.minnum.ppcf128", &eval_llvmminnum);
// intrinsic llvm.maxnum.f32/f64/f80/f128/ppcf128
add_builtin("llvm.maxnum.f32", &eval_llvmmaxnum);
add_builtin("llvm.maxnum.f64", &eval_llvmmaxnum);
add_builtin("llvm.maxnum.f80", &eval_llvmmaxnum);
add_builtin("llvm.maxnum.f128", &eval_llvmmaxnum);
add_builtin("llvm.maxnum.ppcf128", &eval_llvmmaxnum);
// intrinsic llvm.floor.f32/f64/f80/f128/ppcf128
add_builtin("llvm.floor.f32", &eval_llvmfloor);
add_builtin("llvm.floor.f64", &eval_llvmfloor);
add_builtin("llvm.floor.f80", &eval_llvmfloor);
add_builtin("llvm.floor.f128", &eval_llvmfloor);
add_builtin("llvm.floor.ppcf128", &eval_llvmfloor);
// intrinsic llvm.ceil.f32/f64/f80/f128/ppcf128
add_builtin("llvm.ceil.f32", &eval_llvmceil);
add_builtin("llvm.ceil.f64", &eval_llvmceil);
add_builtin("llvm.ceil.f80", &eval_llvmceil);
add_builtin("llvm.ceil.f128", &eval_llvmceil);
add_builtin("llvm.ceil.ppcf128", &eval_llvmceil);
// intrinsic llvm.trunc.f32/f64/f80/f128/ppcf128
add_builtin("llvm.trunc.f32", &eval_llvmtrunc);
add_builtin("llvm.trunc.f64", &eval_llvmtrunc);
add_builtin("llvm.trunc.f80", &eval_llvmtrunc);
add_builtin("llvm.trunc.f128", &eval_llvmtrunc);
add_builtin("llvm.trunc.ppcf128", &eval_llvmtrunc);
// intrinsic llvm.round.f32/f64/f80/f128/ppcf128
add_builtin("llvm.round.f32", &eval_llvmround);
add_builtin("llvm.round.f64", &eval_llvmround);
add_builtin("llvm.round.f80", &eval_llvmround);
add_builtin("llvm.round.f128", &eval_llvmround);
add_builtin("llvm.round.ppcf128", &eval_llvmround);
// intrinsic llvm.bswap.i16/i32/i64/i128
add_builtin("llvm.bswap.i16", &eval_bswap);
add_builtin("llvm.bswap.i32", &eval_bswap);
add_builtin("llvm.bswap.i64", &eval_bswap);
add_builtin("llvm.bswap.i128", &eval_bswap);
// intrinsic llvm.cttz.i8/i16/i32/i64/i128
add_builtin("llvm.cttz.i8", &eval_cttz);
add_builtin("llvm.cttz.i16", &eval_cttz);
add_builtin("llvm.cttz.i32", &eval_cttz);
add_builtin("llvm.cttz.i64", &eval_cttz);
add_builtin("llvm.cttz.i128", &eval_cttz);
// intrinsic llvm.ctlz.i8/i16/i32/i64/i128
add_builtin("llvm.ctlz.i8", &eval_ctlz);
add_builtin("llvm.ctlz.i16", &eval_ctlz);
add_builtin("llvm.ctlz.i32", &eval_ctlz);
add_builtin("llvm.ctlz.i64", &eval_ctlz);
add_builtin("llvm.ctlz.i128", &eval_ctlz);
// intrinsic llvm.ctpop.i8/i16/i32/i64/i128
add_builtin("llvm.ctpop.i8", &eval_ctpop);
add_builtin("llvm.ctpop.i16", &eval_ctpop);
add_builtin("llvm.ctpop.i32", &eval_ctpop);
add_builtin("llvm.ctpop.i64", &eval_ctpop);
add_builtin("llvm.ctpop.i128", &eval_ctpop);
}
else
{
// @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;
}