Russ Cox 60be4a2450 cmd/gc: fix float32 const conversion and printing of big float consts ... The float32 const conversion used to round to float64 and then use the hardware to round to float32. Even though there was a range check before this conversion, the double rounding introduced inaccuracy: the round to float64 might round the value further away from the float32 range, reaching a float64 value that could not actually be rounded to float32. The hardware appears to give us 0 in that case, but it is probably undefined. Double rounding also meant that the wrong value might be used for certain border cases. Do the rounding the float32 ourselves, just as we already did the rounding to float64. This makes the conversion precise and also makes the conversion match the range check. Finally, add some code to print very large (bigger than float64) floating point constants in decimal floating point notation instead of falling back to the precise but human-unreadable binary floating point notation. Fixes #8015. LGTM=iant R=golang-codereviews, iant CC=golang-codereviews, r https://golang.org/cl/100580044		2014-05-19 22:57:59 -04:00
..
bench	test/bench/shootout: support windows	2014-05-09 14:34:50 -07:00
bugs
chan	test/chan: avoid wrap-around in memstats comparison	2013-09-20 17:27:56 -07:00
ddd2.dir
dwarf	test: make rundir match compiledir/errorcheckdir.	2013-01-11 22:00:48 +01:00
fixedbugs	cmd/gc: fix <-<-expr	2014-05-19 15:08:04 -04:00
import2.dir
import4.dir	test: match gccgo import error messages	2013-12-12 19:02:11 -08:00
interface	cmd/gc: don't attempt to generate wrappers for blank interface methods	2013-08-19 11:53:34 +10:00
ken
method4.dir	cmd/gc: do not omit wrapper for expression (interface{...}).F	2014-01-07 13:26:48 +01:00
safe	test: adapt old-style tests to new flag parsing.	2013-01-11 22:05:46 +01:00
stress	test/stress: fix a goroutine leak in threadRing stresstest	2013-06-03 07:07:31 -07:00
syntax	test: match gccgo error messages	2013-12-12 17:18:12 -08:00
64bit.go	cmd/gc: Error out on division by constant zero.	2013-01-30 20:21:08 +01:00
235.go
alias1.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
alias.go
append.go
args.go
assign1.go
assign.go
bigalg.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
bigmap.go
blank1.go	test: match gccgo error messages for blank1.go	2013-09-28 15:19:05 -07:00
blank.go	test: revert changes made for Go SSA interpreter test.	2013-10-08 14:36:20 -04:00
bom.go
bombad.go
bounds.go
chancap.go
char_lit1.go
char_lit.go
closedchan.go
closure.go
cmp6.go	cmd/gc: do not consider length zero arrays as comparable.	2014-01-31 00:30:56 +01:00
cmp.go	cmd/gc: do not nop-convert equivalent but different interface types.	2014-02-27 08:07:50 +01:00
cmplx.go	cmd/gc: reject complex calls with mismatched argument types.	2013-03-11 22:55:14 +01:00
cmplxdivide1.go
cmplxdivide.c
cmplxdivide.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
complit1.go
complit.go
compos.go
const1.go	test: match gccgo error messages	2013-12-12 17:18:12 -08:00
const2.go
const3.go
const4.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
const5.go	cmd/gc: reject builtin function calls in len(fixed array) constants	2014-04-03 19:04:33 -04:00
const6.go	test: match gccgo error strings.	2013-06-26 18:05:02 +02:00
const.go	exp/ssa/interp: (#6 of 5): test interpretation of SSA form of $GOROOT/test/*.go.	2013-02-21 12:48:38 -05:00
convert1.go
convert3.go
convert.go
convlit1.go
convlit.go
convT2X.go
copy.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
crlf.go
ddd1.go
ddd2.go
ddd.go
decl.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
declbad.go
defer.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
deferfin.go	runtime: combine small NoScan allocations	2014-01-24 22:35:11 +04:00
deferprint.go
deferprint.out
divide.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
divmod.go	all: fix a few spelling errors in source comments	2013-12-27 08:59:02 -08:00
empty.go
env.go
eof1.go
eof.go
errchk	test/errchk: use "#!/usr/bin/env perl" shebang line	2013-05-23 04:41:22 +08:00
escape2.go	cmd/gc: fix escape analysis for slice of array	2014-05-12 14:45:05 -04:00
escape3.go
escape4.go
escape5.go	cmd/gc: distinguish unnamed vs blank-named return variables better	2014-02-13 20:59:39 -05:00
escape.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
float_lit2.go	cmd/gc: fix float32 const conversion and printing of big float consts	2014-05-19 22:57:59 -04:00
float_lit3.go	cmd/gc: fix float32 const conversion and printing of big float consts	2014-05-19 22:57:59 -04:00
float_lit.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
floatcmp.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
for.go
func1.go	cmd/gc: ensure unique parameter and result names in function types	2013-03-15 15:24:13 -04:00
func2.go
func3.go
func4.go
func5.go
func6.go
func7.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
func8.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
func.go
funcdup2.go	test: match gccgo error messages	2013-12-12 17:18:12 -08:00
funcdup.go	test: match gccgo error messages	2013-12-12 17:18:12 -08:00
gc1.go
gc2.go
gc.go
gcstring.go	runtime: fix empty string handling in garbage collector	2014-03-11 23:58:39 -04:00
golden.out
goprint.go	test: make goprint.go wait longer for go its routine to execute	2013-04-12 16:04:19 -07:00
goprint.out
goto.go
helloworld.go
helloworld.out
if.go
import1.go	test: match gccgo import error messages	2013-12-12 19:02:11 -08:00
import2.go
import4.go
import5.go
import.go
index0.go
index1.go
index2.go
index.go	test: recognize gccgo error message in index.go	2013-09-27 20:38:52 -07:00
indirect1.go
indirect.go
init1.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
init.go
initcomma.go
initialize.go
initializerr.go
int_lit.go
intcvt.go
iota.go
label1.go
label.go
linkx.go
literal.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
live1.go	cmd/gc: correct liveness for fat variables	2014-02-15 10:58:55 -05:00
live.go	cmd/gc, runtime: make GODEBUG=gcdead=1 mode work with liveness	2014-04-03 20:33:25 -04:00
mallocfin.go
map1.go
map.go	test: fix flaky NaN-key map complexity test	2013-04-07 11:56:15 -07:00
mapnan.go	test/mapnan: use time.Now instead of syscall.Getrusage	2013-10-22 18:33:37 -04:00
method1.go
method2.go	cmd/gc: fix method values whose receiver is an unnamed interface.	2013-08-29 10:00:58 +02:00
method3.go
method4.go
method5.go	cmd/gc: implement method values	2013-03-20 17:11:09 -04:00
method.go	test: a number of fixes.	2013-02-11 18:20:52 -05:00
named1.go
named.go
nil.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
nilcheck.go	cmd/gc: &x panics if x does	2013-08-15 14:38:32 -04:00
nilptr2.go	test: revert changes made for Go SSA interpreter test.	2013-10-08 14:36:20 -04:00
nilptr3.go	cmd/gc: correct handling of globals, func args, results	2014-05-15 15:34:53 -04:00
nilptr4.go	cmd/gc: fix bad checknil with ints on 32 bit compilers	2014-02-26 12:25:13 -08:00
nilptr.go	test/nilptr: add more tests	2013-09-05 23:06:34 -04:00
nosplit.go	liblink, cmd/ld: reenable nosplit checking and test	2014-04-16 22:08:00 -04:00
nul1.go
parentype.go
peano.go
printbig.go
printbig.out
range.go	test: a number of fixes.	2013-02-11 18:20:52 -05:00
recover1.go
recover2.go
recover3.go	tests: remove two misuses of nil pointers	2013-08-15 11:51:04 -04:00
recover.go	test: disable failing tests under ssa/interp.	2013-09-18 14:44:57 -04:00
rename1.go
rename.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00
reorder2.go	cmd/gc: shorten temporary lifetimes when possible	2014-04-01 13:31:38 -04:00
reorder.go	test: a number of fixes.	2013-02-11 18:20:52 -05:00
return.go	test: add cases to return.go that gccgo got wrong	2013-08-07 11:31:01 -07:00
rotate0.go	test: add rotate.go and fixedbugs/bug313	2013-01-11 22:42:55 +01:00
rotate1.go	test: add rotate.go and fixedbugs/bug313	2013-01-11 22:42:55 +01:00
rotate2.go	test: add rotate.go and fixedbugs/bug313	2013-01-11 22:42:55 +01:00
rotate3.go	test: add rotate.go and fixedbugs/bug313	2013-01-11 22:42:55 +01:00
rotate.go	test: add rotate.go and fixedbugs/bug313	2013-01-11 22:42:55 +01:00
run	test/run: add /usr/pkg/bin to PATH.	2014-03-03 02:16:15 -05:00
run.go	test/run: make errorcheck tests faster	2014-03-11 23:58:24 -04:00
rune.go
runtime.go
shift1.go	test/shift1.go: recognize gccgo errors	2013-06-26 08:23:52 -07:00
shift2.go	test: add shift expression incorrectly rejected by gccgo.	2013-06-25 08:06:34 +02:00
sieve.go
sigchld.go	test: skip SIGCHLD test on Plan 9	2014-01-29 09:28:23 +01:00
sigchld.out
simassign.go
sinit.go
sizeof.go	test: correct sizeof.go.	2013-06-02 19:10:11 +02:00
slice3.go	cmd/gc: support x[i:j:k]	2013-07-01 20:32:36 -04:00
slice3err.go	test: match gccgo error messages	2013-12-12 17:18:12 -08:00
solitaire.go
stack.go
string_lit.go	test: add []rune case to string_lit.go	2013-12-12 17:17:02 -08:00
stringrange.go
struct0.go
switch3.go
switch4.go	cmd/gc: disallow fallthrough in final case of switch	2013-03-15 00:35:09 -04:00
switch.go	cmd/gc: disallow fallthrough in final case of switch	2013-03-15 00:35:09 -04:00
testlib	test/run: process build tags like go/build	2013-08-13 12:25:41 -04:00
tinyfin.go	runtime: combine small NoScan allocations	2014-01-24 22:35:11 +04:00
torture.go
turing.go
typecheck.go	cmd/gc: silence assignment errors to undefined symbols	2014-01-03 21:03:20 +01:00
typeswitch1.go
typeswitch2.go
typeswitch3.go
typeswitch.go
undef.go
utf.go
varerr.go
varinit.go
zerodivide.go	test: ensure all failing tests exit nonzero.	2013-02-12 13:17:49 -05:00