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Further support for floating-point. Literals with exponents work 

and literals with the 'f32' or 'f64' suffixes work as well. In
addition, logging things with the f32 or f64 type works. (float is
still assumed to be a synonym for f64).
This commit is contained in:
Tim Chevalier 2011-03-22 17:25:40 -07:00 committed by Graydon Hoare
parent d56971d5b4
commit 23e23bd762
10 changed files with 153 additions and 26 deletions
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3
Makefile.in
View File

@ -486,7 +486,8 @@ rustllvm/%.o: rustllvm/%.cpp $(MKFILES)
# Float doesn't work in boot
FLOAT_XFAILS := test/run-pass/float.rs
FLOAT_XFAILS := test/run-pass/float.rs \
test/run-pass/float2.rs
# Temporarily xfail tests broken by the nominal-tags change.

3
src/Makefile
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@ -419,7 +419,8 @@ self: $(CFG_RUSTC)
# Float doesn't work in boot
FLOAT_XFAILS := test/run-pass/float.rs
FLOAT_XFAILS := test/run-pass/float.rs \
test/run-pass/float2.rs
# Temporarily xfail tests broken by the nominal-tags change.

1
src/comp/front/ast.rs
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@ -256,6 +256,7 @@ tag lit_ {
lit_uint(uint);
lit_mach_int(ty_mach, int);
lit_float(str);
lit_mach_float(ty_mach, str);
lit_nil;
lit_bool(bool);
}

75
src/comp/front/lexer.rs
View File

@ -3,6 +3,9 @@ import std._str;
import std._int;
import std.map;
import std.map.hashmap;
import std.option;
import std.option.some;
import std.option.none;
import util.common;
import util.common.new_str_hash;
@ -333,6 +336,27 @@ impure fn scan_dec_digits(reader rdr) -> int {
ret accum_int;
}
impure fn scan_exponent(reader rdr) -> option.t[int] {
auto c = rdr.curr();
auto sign = 1;
if (c == 'e' || c == 'E') {
rdr.bump();
c = rdr.curr();
if (c == '-') {
sign = -1;
rdr.bump();
} else if (c == '+') {
rdr.bump();
}
auto exponent = scan_dec_digits(rdr);
ret(some(sign * exponent));
}
else {
ret none[int];
}
}
impure fn scan_number(mutable char c, reader rdr) -> token.token {
auto accum_int = 0;
auto n = rdr.next();
@ -418,17 +442,54 @@ impure fn scan_number(mutable char c, reader rdr) -> token.token {
ret token.LIT_UINT(accum_int as uint);
}
}
n = rdr.curr();
if(n == '.') {
c = rdr.curr();
if (c == '.') {
// Parse a floating-point number.
rdr.bump();
auto accum_int1 = scan_dec_digits(rdr);
ret token.LIT_FLOAT(_int.to_str(accum_int, 10u) + "."
+ _int.to_str(accum_int1, 10u));
// FIXME: Parse exponent.
auto base_str = _int.to_str(accum_int, 10u) + "."
+ _int.to_str(accum_int1, 10u);
c = rdr.curr();
auto exponent_str = "";
let option.t[int] maybe_exponent = scan_exponent(rdr);
alt(maybe_exponent) {
case(some[int](?i)) {
exponent_str = "e" + _int.to_str(i, 10u);
}
case(none[int]) {
}
}
c = rdr.curr();
if (c == 'f') {
rdr.bump();
c = rdr.curr();
n = rdr.next();
if (c == '3' && n == '2') {
rdr.bump(); rdr.bump();
ret token.LIT_MACH_FLOAT(util.common.ty_f32,
base_str + exponent_str);
}
else if (c == '6' && n == '4') {
rdr.bump(); rdr.bump();
ret token.LIT_MACH_FLOAT(util.common.ty_f64,
base_str + exponent_str);
}
}
else {
ret token.LIT_FLOAT(base_str + exponent_str);
}
}
else {
ret token.LIT_INT(accum_int);
auto maybe_exponent = scan_exponent(rdr);
alt(maybe_exponent) {
case(some[int](?i)) {
ret token.LIT_FLOAT(_int.to_str(accum_int, 10u)
+ "e" + _int.to_str(i, 10u));
}
case(none[int]) {
ret token.LIT_INT(accum_int);
}
}
}

4
src/comp/front/parser.rs
View File

@ -545,6 +545,10 @@ impure fn parse_lit(parser p) -> ast.lit {
p.bump();
lit = ast.lit_mach_int(tm, i);
}
case (token.LIT_MACH_FLOAT(?tm, ?s)) {
p.bump();
lit = ast.lit_mach_float(tm, s);
}
case (token.LIT_CHAR(?c)) {
p.bump();
lit = ast.lit_char(c);

1
src/comp/front/token.rs
View File

@ -127,6 +127,7 @@ tag token {
LIT_UINT(uint);
LIT_MACH_INT(ty_mach, int);
LIT_FLOAT(str);
LIT_MACH_FLOAT(ty_mach, str);
LIT_STR(str);
LIT_CHAR(char);
LIT_BOOL(bool);

56
src/comp/middle/trans.rs
View File

@ -763,6 +763,10 @@ fn C_float(str s) -> ValueRef {
ret llvm.LLVMConstRealOfString(T_float(), _str.buf(s));
}
fn C_floating(str s, TypeRef t) -> ValueRef {
ret llvm.LLVMConstRealOfString(t, _str.buf(s));
}
fn C_nil() -> ValueRef {
// NB: See comment above in T_void().
ret C_integral(0, T_i1());
@ -2338,6 +2342,14 @@ fn trans_lit(@crate_ctxt cx, &ast.lit lit, &ast.ann ann) -> ValueRef {
case(ast.lit_float(?fs)) {
ret C_float(fs);
}
case(ast.lit_mach_float(?tm, ?s)) {
auto t = T_float();
alt(tm) {
case(common.ty_f32) { t = T_f32(); }
case(common.ty_f64) { t = T_f64(); }
}
ret C_floating(s, t);
}
case (ast.lit_char(?c)) {
ret C_integral(c as int, T_char());
}
@ -2719,7 +2731,7 @@ fn trans_eager_binop(@block_ctxt cx, ast.binop op, @ty.t intype,
ValueRef lhs, ValueRef rhs) -> result {
auto is_float = false;
alt(intype.struct) {
alt (intype.struct) {
case (ty.ty_float) {
is_float = true;
}
@ -2727,7 +2739,7 @@ fn trans_eager_binop(@block_ctxt cx, ast.binop op, @ty.t intype,
is_float = false;
}
}
alt (op) {
case (ast.add) {
if (ty.type_is_sequence(intype)) {
@ -2749,7 +2761,7 @@ fn trans_eager_binop(@block_ctxt cx, ast.binop op, @ty.t intype,
}
}
case (ast.mul) {
case (ast.mul) {
if (is_float) {
ret res(cx, cx.build.FMul(lhs, rhs));
}
@ -4582,13 +4594,33 @@ fn trans_log(@block_ctxt cx, @ast.expr e) -> result {
auto sub = trans_expr(cx, e);
auto e_ty = ty.expr_ty(e);
alt (e_ty.struct) {
case(ty.ty_float) {
auto tmp = sub.bcx.build.Alloca(T_float());
sub.bcx.build.Store(sub.val, tmp);
sub = res(sub.bcx, tmp);
if (ty.type_is_fp(e_ty)) {
let TypeRef tr;
let bool is32bit = false;
alt (e_ty.struct) {
case (ty.ty_machine(util.common.ty_f32)) {
tr = T_f32();
is32bit = true;
}
case (ty.ty_machine(util.common.ty_f64)) {
tr = T_f64();
}
case (_) {
tr = T_float();
}
}
if (is32bit) {
ret trans_upcall(sub.bcx,
"upcall_log_float",
vec(sub.val));
} else {
auto tmp = sub.bcx.build.Alloca(tr);
sub.bcx.build.Store(sub.val, tmp);
auto v = vp2i(sub.bcx, tmp);
ret trans_upcall(sub.bcx,
"upcall_log_double",
vec(v));
}
case(_) { }
}
alt (e_ty.struct) {
@ -4598,12 +4630,6 @@ fn trans_log(@block_ctxt cx, @ast.expr e) -> result {
"upcall_log_str",
vec(v));
}
case (ty.ty_float) {
auto v = vp2i(sub.bcx, sub.val);
ret trans_upcall(sub.bcx,
"upcall_log_float",
vec(v));
}
case (_) {
ret trans_upcall(sub.bcx,
"upcall_log_int",

4
src/comp/middle/typeck.rs
View File

@ -1497,7 +1497,9 @@ fn check_lit(@ast.lit lit) -> @ty.t {
case (ast.lit_str(_)) { sty = ty.ty_str; }
case (ast.lit_char(_)) { sty = ty.ty_char; }
case (ast.lit_int(_)) { sty = ty.ty_int; }
case (ast.lit_float(_)) { sty = ty.ty_float; }
case (ast.lit_float(_)) { sty = ty.ty_float; }
case (ast.lit_mach_float(?tm, _))
{ sty = ty.ty_machine(tm); }
case (ast.lit_uint(_)) { sty = ty.ty_uint; }
case (ast.lit_mach_int(?tm, _)) { sty = ty.ty_machine(tm); }
case (ast.lit_nil) { sty = ty.ty_nil; }

9
src/rt/rust_upcall.cpp
View File

@ -40,7 +40,14 @@ void upcall_log_int(rust_task *task, int32_t i) {
}
extern "C" CDECL
void upcall_log_float(rust_task *task, double *f) {
void upcall_log_float(rust_task *task, float f) {
LOG_UPCALL_ENTRY(task);
task->log(rust_log::UPCALL | rust_log::ULOG,
"rust: %12.12f", f);
}
extern "C" CDECL
void upcall_log_double(rust_task *task, double *f) {
LOG_UPCALL_ENTRY(task);
task->log(rust_log::UPCALL | rust_log::ULOG,
"rust: %12.12f", *f);

23
src/test/run-pass/float2.rs Normal file
View File

@ -0,0 +1,23 @@
fn main() {
auto a = 1.5e6;
auto b = 1.5E6;
auto c = 1e6;
auto d = 1E6;
auto e = 3.0f32;
auto f = 5.9f64;
auto g = 1.e6f32;
auto h = 1.0e7f64;
auto i = 1.0E7f64;
auto j = 3.1e+9;
auto k = 3.2e-10;
check(a == b);
check(c < b);
check(c == d);
check(e < g);
check(f < h);
check(g == 1000000.0f32);
check(h == i);
check(j > k);
check(k < a);
}