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Cherry Zhang b08a9b7ecc all: use new softfloat on GOARM=5 
Use the new softfloat support in the compiler, originally added
for softfloat on MIPS. This support is portable, so we can just
use it for softfloat on ARM.

In the old softfloat support on ARM, the compiler generates
floating point instructions, then the assembler inserts calls
to _sfloat before FP instructions. _sfloat decodes the following
FP instructions and simulates them.

In the new scheme, the compiler generates runtime calls to do FP
operations at a higher level. It doesn't generate FP instructions,
and therefore the assembler won't insert _sfloat calls, i.e. the
old mechanism is automatically suppressed.

The old method may be still be triggered with assembly code
using FP instructions. In the standard library, the only
occurance is math/sqrt_arm.s, which is rewritten to call to the
Go implementation instead.

Some significant speedups for code using floating points:

name                     old time/op    new time/op     delta
BinaryTree17-4              37.1s ± 2%      37.3s ± 1%     ~     (p=0.105 n=10+10)
Fannkuch11-4                13.0s ± 0%      13.1s ± 0%   +0.46%  (p=0.000 n=10+10)
FmtFprintfEmpty-4           700ns ± 4%      734ns ± 6%   +4.84%  (p=0.009 n=10+10)
FmtFprintfString-4         1.22µs ± 3%     1.22µs ± 4%     ~     (p=0.897 n=10+10)
FmtFprintfInt-4            1.27µs ± 2%     1.30µs ± 1%   +1.91%  (p=0.001 n=10+9)
FmtFprintfIntInt-4         1.83µs ± 2%     1.81µs ± 3%     ~     (p=0.149 n=10+10)
FmtFprintfPrefixedInt-4    1.80µs ± 3%     1.81µs ± 2%     ~     (p=0.421 n=10+8)
FmtFprintfFloat-4          6.89µs ± 3%     3.59µs ± 2%  -47.93%  (p=0.000 n=10+10)
FmtManyArgs-4              6.39µs ± 1%     6.09µs ± 1%   -4.61%  (p=0.000 n=10+9)
GobDecode-4                 109ms ± 2%       81ms ± 2%  -25.99%  (p=0.000 n=9+10)
GobEncode-4                 109ms ± 2%       76ms ± 2%  -29.88%  (p=0.000 n=10+9)
Gzip-4                      3.61s ± 1%      3.59s ± 1%     ~     (p=0.247 n=10+10)
Gunzip-4                    449ms ± 4%      450ms ± 1%     ~     (p=0.230 n=10+7)
HTTPClientServer-4         1.55ms ± 3%     1.53ms ± 2%     ~     (p=0.400 n=9+10)
JSONEncode-4                356ms ± 1%      183ms ± 1%  -48.73%  (p=0.000 n=10+10)
JSONDecode-4                1.12s ± 2%      0.87s ± 1%  -21.88%  (p=0.000 n=10+10)
Mandelbrot200-4             5.49s ± 1%      2.55s ± 1%  -53.45%  (p=0.000 n=9+10)
GoParse-4                  49.6ms ± 2%     47.5ms ± 1%   -4.08%  (p=0.000 n=10+9)
RegexpMatchEasy0_32-4      1.13µs ± 4%     1.20µs ± 4%   +6.42%  (p=0.000 n=10+10)
RegexpMatchEasy0_1K-4      4.41µs ± 2%     4.44µs ± 2%     ~     (p=0.128 n=10+10)
RegexpMatchEasy1_32-4      1.15µs ± 5%     1.20µs ± 5%   +4.85%  (p=0.002 n=10+10)
RegexpMatchEasy1_1K-4      6.21µs ± 2%     6.37µs ± 4%   +2.62%  (p=0.001 n=9+10)
RegexpMatchMedium_32-4     1.58µs ± 5%     1.65µs ± 3%   +4.85%  (p=0.000 n=10+10)
RegexpMatchMedium_1K-4      341µs ± 3%      351µs ± 7%     ~     (p=0.573 n=8+10)
RegexpMatchHard_32-4       21.4µs ± 3%     21.5µs ± 5%     ~     (p=0.931 n=9+9)
RegexpMatchHard_1K-4        626µs ± 2%      626µs ± 1%     ~     (p=0.645 n=8+8)
Revcomp-4                  46.4ms ± 2%     47.4ms ± 2%   +2.07%  (p=0.000 n=10+10)
Template-4                  1.31s ± 3%      1.23s ± 4%   -6.13%  (p=0.000 n=10+10)
TimeParse-4                4.49µs ± 1%     4.41µs ± 2%   -1.81%  (p=0.000 n=10+9)
TimeFormat-4               9.31µs ± 1%     9.32µs ± 2%     ~     (p=0.561 n=9+9)

Change-Id: Iaeeff6c9a09c1b2c064d06e09dd88101dc02bfa4
Reviewed-on: https://go-review.googlesource.com/106735
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-04-13 16:39:39 +00:00
..
alias3.dir
bench
chan all: fix article typos 2017-09-15 02:39:16 +00:00
closure3.dir cmd/compile: inline closures with captures 2017-11-05 04:18:05 +00:00
codegen test/codegen: port last stack and memcombining tests 2018-04-11 16:08:04 +00:00
ddd2.dir
dwarf
fixedbugs cmd/compile: fix evaluation of "" < s 2018-04-12 19:38:37 +00:00
import2.dir
import4.dir
interface cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
intrinsic.dir
ken
linkname.dir
method4.dir
retjmp.dir cmd/asm: fix assembling return jump 2018-03-01 21:11:16 +00:00
safe
stress
syntax cmd/compile: better handling of incorrect type switches 2018-04-03 05:34:20 +00:00
uintptrescapes.dir
64bit.go
235.go
alg.go
alias1.go
alias2.go cmd/compile: cleanup method symbol creation 2018-04-05 22:01:17 +00:00
alias3.go
alias.go
align.go test: check that unaligned load-add opcodes work. 2018-04-09 18:57:37 +00:00
append1.go cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
append.go
args.go
armimm.go cmd/internal/obj: continue to optimize ARM's constant pool 2017-05-11 13:53:54 +00:00
assign1.go
assign.go
atomicload.go
bigalg.go
bigmap.go
blank1.go
blank.go
bom.go
bombad.go
bounds.go
chancap.go runtime: use sparse mappings for the heap 2018-02-15 21:12:23 +00:00
chanlinear.go
char_lit1.go
char_lit.go
checkbce.go test: add missing copyright header to checkbce.go 2017-05-18 00:05:25 +00:00
clearfat.go
closedchan.go
closure1.go
closure2.go
closure3.go cmd/compile: fix reassignment check 2017-11-03 20:09:26 +00:00
closure.go
cmp6.go
cmp.go
cmplx.go cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
cmplxdivide1.go
cmplxdivide.c
cmplxdivide.go
complit1.go cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
complit.go
compos.go
const1.go cmd/compile: fix constant pointer comparison failure 2018-04-09 23:19:45 +00:00
const2.go
const3.go
const4.go
const5.go
const6.go
const.go
convert1.go
convert2.go
convert3.go
convert.go
convlit1.go
convlit.go
convT2X.go
copy1.go cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
copy.go
crlf.go
ddd1.go test: reenable ... test 2017-08-11 17:41:17 +00:00
ddd2.go
ddd.go
decl.go
declbad.go
defer.go
deferfin.go
deferprint.go
deferprint.out
devirt.go
divide.go
divmod.go
empty.go
env.go
eof1.go
eof.go
errchk test: skip "# package/path" output from cmd/go in errchk 2017-12-13 21:32:01 +00:00
escape2.go test: add missing escape analysis test 2017-08-11 00:56:21 +00:00
escape2n.go test: add missing escape analysis test 2017-08-11 00:56:21 +00:00
escape3.go
escape4.go cmd/compile: inline calls to local closures 2017-10-11 22:32:36 +00:00
escape5.go cmd/compile: in escape analysis, propagate loop depth to field 2018-04-13 14:48:23 +00:00
escape_array.go cmd/compile: print accurate escape reason for non-const-length slices 2018-03-28 16:56:03 +00:00
escape_because.go test: update list of escape reasons 2018-03-29 14:17:40 +00:00
escape_calls.go
escape_closure.go
escape_field.go
escape_iface.go
escape_indir.go
escape_level.go
escape_map.go
escape_param.go
escape_slice.go
escape_struct_param1.go
escape_struct_param2.go
escape_struct_return.go
escape.go
fibo.go
finprofiled.go
float_lit2.go
float_lit3.go
float_lit.go
floatcmp.go
for.go
func1.go
func2.go
func3.go
func4.go
func5.go
func6.go
func7.go
func8.go
func.go
funcdup2.go
funcdup.go
gc1.go
gc2.go
gc.go
gcstring.go
goprint.go
goprint.out
goto.go cmd/compile: report block start for gotos jumping into blocks 2017-04-19 02:27:58 +00:00
heapsampling.go
helloworld.go
helloworld.out
if.go
import1.go
import2.go
import4.go
import5.go cmd/compile: be slightly more tolerant in case of certain syntax errors 2017-03-24 20:07:15 +00:00
import6.go
import.go
index0.go
index1.go
index2.go
index.go
indirect1.go
indirect.go
init1.go
init.go
initcomma.go
initialize.go
initializerr.go cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
initloop.go
inline_caller.go runtime: skip logical frames in runtime.Caller 2017-04-18 19:56:30 +00:00
inline_callers.go test: make inline_callers.go test not inline the runtime 2017-11-22 00:52:54 +00:00
inline_literal.go
inline_variadic.go cmd/compile: enable inlining variadic functions 2018-03-13 20:34:03 +00:00
inline.go cmd/compile: inline closures with captures 2017-11-05 04:18:05 +00:00
int_lit.go
intcvt.go
intrinsic_atomic.go cmd/compile: intrinsify atomics on MIPS64 2017-10-10 19:43:38 +00:00
intrinsic.go
iota.go
label1.go cmd/compile/internal/gc: don't panic on continue in switch 2017-04-12 14:27:45 +00:00
label.go
linkmain_run.go
linkmain.go
linkname.go
linkobj.go
linkx_run.go
linkx.go
literal.go
live1.go
live2.go cmd/compile: specialize map creation for small hint sizes 2017-11-02 17:03:45 +00:00
live_syscall.go cmd/compile: fix unsafe.Pointer liveness for Syscall-like functions 2017-12-08 21:34:24 +00:00
live.go cmd/compile: mark the first word of an interface as a uintptr 2018-02-27 22:58:32 +00:00
locklinear.go test: skip locklinear's lockmany test for now 2018-04-05 10:53:40 +00:00
loopbce.go cmd/compile: make loop guard+rotate conditional on GOEXPERIMENT 2017-06-21 22:07:33 +00:00
makechan.go cmd/compile: generate makechan calls with int arguments 2017-08-15 05:54:24 +00:00
makemap.go test: check that size argument errors are emitted at call site 2018-03-14 08:36:15 +00:00
makenew.go cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
mallocfin.go
map1.go cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
map.go
maplinear.go
mergemul.go cmd/compile: combine x*n - y*n into (x-y)*n 2017-09-03 14:29:38 +00:00
method1.go
method2.go cmd/compile: add two error position tests for the typechecker 2017-10-12 20:50:20 +00:00
method3.go
method4.go
method5.go
method6.go cmd/compile: add two error position tests for the typechecker 2017-10-12 20:50:20 +00:00
method7.go cmd/compile: fix method expressions with anonymous receivers 2018-04-06 15:39:11 +00:00
method.go
named1.go
named.go
nil.go
nilcheck.go
nilptr2.go
nilptr3.go cmd/compile: remove more nil ptr checks after newobject 2017-08-25 03:26:58 +00:00
nilptr4.go
nilptr.go
nosplit.go test: fix and re-enable nosplit.go 2017-10-31 19:12:11 +00:00
notinheap2.go
notinheap3.go cmd/compile: []T where T is go:notinheap does not need write barriers 2017-11-06 21:07:57 +00:00
notinheap.go
nowritebarrier.go cmd/compile: improve coverage of nowritebarrierrec check 2017-10-29 19:36:44 +00:00
nul1.go
opt_branchlikely.go
parentype.go
peano.go
phiopt.go
print.go cmd/compile: fix print/println when input is uint 2017-09-26 04:08:38 +00:00
print.out cmd/compile: fix print/println when input is uint 2017-09-26 04:08:38 +00:00
printbig.go
printbig.out
prove.go cmd/compile: in prove, complete support for OpIsInBounds/OpIsSliceInBounds 2018-04-03 20:25:34 +00:00
range.go cmd/compile: improve single blank variable handling in walkrange 2017-09-12 05:50:54 +00:00
README.md test: use the version of Go used to run run.go 2018-03-03 19:52:00 +00:00
recover1.go
recover2.go
recover3.go
recover4.go all: use Fatalf instead of Fatal if format is given 2018-01-10 01:35:45 +00:00
recover5.go cmd/compile: more error position tests for the typechecker 2017-04-24 12:37:49 +00:00
recover.go
reflectmethod1.go
reflectmethod2.go
reflectmethod3.go
reflectmethod4.go
rename1.go cmd/compile: avoid duplicate cast error 2017-08-22 13:44:35 +00:00
rename.go
reorder2.go
reorder.go
retjmp.go cmd/asm: fix assembling return jump 2018-03-01 21:11:16 +00:00
return.go
rotate0.go
rotate1.go
rotate2.go
rotate3.go
rotate.go
run.go all: use new softfloat on GOARM=5 2018-04-13 16:39:39 +00:00
rune.go
runtime.go
shift1.go cmd/compile: permit indices of certain non-constant shifts 2017-12-01 20:39:50 +00:00
shift2.go
sieve.go
sigchld.go
sigchld.out
simassign.go
sinit_run.go
sinit.go
sizeof.go
slice3.go
slice3err.go
slicecap.go
sliceopt.go cmd/compile: make prove pass use unsatisfiability 2018-03-08 22:25:25 +00:00
solitaire.go
stack.go
strength.go
string_lit.go
stringrange.go
struct0.go
switch2.go
switch3.go
switch4.go
switch5.go cmd/compile: make duplicate expr cases readable 2017-05-19 18:11:51 +00:00
switch6.go
switch7.go cmd/compile: make duplicate expr cases readable 2017-05-19 18:11:51 +00:00
switch.go
tinyfin.go
torture.go
turing.go
typecheck.go
typecheckloop.go
typeswitch1.go
typeswitch2.go
typeswitch3.go cmd/compile: add test for non interface type switch 2017-03-25 22:52:54 +00:00
typeswitch.go
uintptrescapes2.go cmd/compile: fix go:uintptrescapes tag for unnamed parameters 2018-02-14 21:41:39 +00:00
uintptrescapes.go
undef.go
utf.go
varerr.go
varinit.go
writebarrier.go cmd/compile: don't use statictmps for SSA-able composite literals 2017-05-11 18:28:40 +00:00
zerodivide.go

README.md

The test directory contains tests of the Go tool chain and runtime. It includes black box tests, regression tests, and error output tests. They are run as part of all.bash.

To run just these tests, execute:

../bin/go run run.go

Standard library tests should be written as regular Go tests in the appropriate package.

The tool chain and runtime also have regular Go tests in their packages. The main reasons to add a new test to this directory are:

  • it is most naturally expressed using the test runner; or
  • it is also applicable to gccgo and other Go tool chains.