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Michael Munday 2c1b5130aa cmd/compile: add math/bits.{Add,Sub}64 intrinsics on s390x 
This CL adds intrinsics for the 64-bit addition and subtraction
functions in math/bits. These intrinsics use the condition code
to propagate the carry or borrow bit.

To make the carry chains more efficient I've removed the
'clobberFlags' property from most of the load and store
operations. Originally these ops did clobber flags when using
offsets that didn't fit in a signed 20-bit integer, however
that is no longer true.

As with other platforms the intrinsics are faster when executed
in a chain rather than a loop because currently we need to spill
and restore the carry bit between each loop iteration. We may
be able to reduce the need to do this on s390x (e.g. by using
compare-and-branch instructions that do not clobber flags) in the
future.

name           old time/op  new time/op  delta
Add64          1.21ns ± 2%  2.03ns ± 2%  +67.18%  (p=0.000 n=7+10)
Add64multiple  2.98ns ± 3%  1.03ns ± 0%  -65.39%  (p=0.000 n=10+9)
Sub64          1.23ns ± 4%  2.03ns ± 1%  +64.85%  (p=0.000 n=10+10)
Sub64multiple  3.73ns ± 4%  1.04ns ± 1%  -72.28%  (p=0.000 n=10+8)

Change-Id: I913bbd5e19e6b95bef52f5bc4f14d6fe40119083
Reviewed-on: https://go-review.googlesource.com/c/go/+/174303
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-05-03 10:41:15 +00:00
..
alias3.dir
bench test/bench/go1: add go.mod file 2019-03-06 18:53:12 +00:00
chan test/chan: fix broken link to Squinting at Power Series 2019-02-06 20:54:16 +00:00
closure3.dir cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
codegen cmd/compile: add math/bits.{Add,Sub}64 intrinsics on s390x 2019-05-03 10:41:15 +00:00
ddd2.dir
dwarf
fixedbugs cmd/compile: fix isStaticCompositeLiteral reports wrong for struct field 2019-05-03 03:49:11 +00:00
import2.dir
import4.dir
interface
intrinsic.dir
ken test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
linkname.dir cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
method4.dir
oldescape_linkname.dir cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
retjmp.dir cmd/asm: fix assembling return jump 2018-03-01 21:11:16 +00:00
runtime cmd/compile: shortcut intrinsic inlining AFTER getcallerXX check 2019-04-19 20:18:29 +00:00
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: optimize append(x, make([]T, y)...) slice extension 2018-05-06 04:28:23 +00:00
append.go cmd/compile: optimize append(x, make([]T, y)...) slice extension 2018-05-06 04:28:23 +00:00
args.go
armimm.go
assign1.go
assign.go
atomicload.go
bigalg.go
bigmap.go
blank1.go
blank.go
bom.go
bombad.go
bounds.go test: gofmt bounds.go 2018-05-29 02:39:16 +00:00
chancap.go runtime: handle 64bits addresses for AIX 2018-11-26 14:06:28 +00:00
chanlinear.go
char_lit1.go
char_lit.go
checkbce.go cmd/compile: fix ordering for short-circuiting ops 2019-03-06 20:04:07 +00:00
clearfat.go
closedchan.go
closure1.go
closure2.go
closure3.go all: fix a bunch of misspellings 2018-10-06 15:40:03 +00:00
closure4.go cmd/compile/internal/gc: add nil check for closure call on wasm 2018-08-14 09:19:38 +00:00
closure.go
cmp6.go
cmp.go
cmplx.go cmd/compile: rewrite f(g()) for multi-value g() during typecheck 2019-03-14 21:00:20 +00:00
cmplxdivide1.go
cmplxdivide.c
cmplxdivide.go
complit1.go
complit.go
compos.go
const1.go cmd/compile: fix ICE from invalid operations on float/complex constants 2019-03-28 17:46:55 +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: rewrite f(g()) for multi-value g() during typecheck 2019-03-14 21:00:20 +00:00
copy.go
crlf.go
ddd1.go
ddd2.go
ddd.go
decl.go
declbad.go
defer.go
deferfin.go
deferprint.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
deferprint.out
devirt.go
divide.go
divmod.go
empty.go
env.go
eof1.go
eof.go
escape2.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape2n.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape3.go
escape4.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
escape5.go test: add regress test for issue 28369 2019-04-16 21:01:30 +00:00
escape_array.go cmd/compile: trim more unnecessary escape analysis messages 2019-04-02 18:00:32 +00:00
escape_because.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape_calls.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape_closure.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape_field.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape_iface.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape_indir.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
escape_level.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
escape_map.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
escape_param.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape_runtime_atomic.go test: fix escape_runtime_atomic.go 2019-04-17 22:55:26 +00:00
escape_selfassign.go test: add regress test cases for self-assignment 2019-04-17 16:36:56 +00:00
escape_slice.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
escape_struct_param1.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
escape_struct_param2.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
escape_struct_return.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
escape_sync_atomic.go runtime/internal/atomic: remove bad go:noescape annotations on Loadp 2019-04-17 19:09:15 +00:00
escape_unsafe.go test: add regress tests for unsafe.Pointer rules 2019-04-03 16:03:55 +00:00
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 all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
gc.go
gcgort.go test: fast GC+concurrency+types verification 2018-05-08 21:15:48 +00:00
gcstring.go
goprint.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
goprint.out
goto.go
heapsampling.go test: improve test coverage for heap sampling 2019-03-07 21:05:15 +00:00
helloworld.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
helloworld.out
if.go
import1.go
import2.go
import4.go
import5.go
import6.go
import.go
index0.go
index1.go
index2.go
index.go
indirect1.go
indirect.go
init1.go
init.go cmd/compile: reorganize init functions 2019-03-18 20:10:55 +00:00
initcomma.go
initialize.go
initializerr.go
initloop.go
inline_big.go cmd/compile: set stricter inlining threshold in large functions 2018-07-24 16:11:08 +00:00
inline_caller.go runtime: make FuncForPC return the innermost inlined frame 2019-01-08 21:54:04 +00:00
inline_callers.go runtime: make FuncForPC return the innermost inlined frame 2019-01-08 21:54:04 +00:00
inline_literal.go
inline_math_bits_rotate.go cmd/compile: make math/bits.RotateLeft* an intrinsic on amd64 2018-08-30 22:48:28 +00:00
inline_sync.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
inline_variadic.go cmd/compile: enable inlining variadic functions 2018-03-13 20:34:03 +00:00
inline.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
int_lit.go
intcvt.go
intrinsic_atomic.go
intrinsic.go
iota.go
label1.go
label.go
linkmain_run.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
linkmain.go
linkname.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
linkobj.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
linkx_run.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
linkx.go
literal2.go cmd/compile: accept 'i' suffix orthogonally on all numbers 2019-02-19 22:45:09 +00:00
literal.go
live1.go
live2.go cmd/compile,runtime: remove ambiguously live logic 2018-10-03 19:54:16 +00:00
live_syscall.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
live.go cmd/compile: fix ordering for short-circuiting ops 2019-03-06 20:04:07 +00:00
locklinear.go test: skip locklinear's lockmany test for now 2018-04-05 10:53:40 +00:00
loopbce.go cmd/compile: reverse order of slice bounds checks 2019-03-09 00:52:45 +00:00
makechan.go
makemap.go test: check that size argument errors are emitted at call site 2018-03-14 08:36:15 +00:00
makenew.go
mallocfin.go
map1.go
map.go
mapclear.go cmd/compile: optimize map-clearing range idiom 2018-05-08 21:15:16 +00:00
maplinear.go
mergemul.go
method1.go
method2.go
method3.go
method4.go
method5.go
method6.go
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: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nilptr4.go
nilptr5_aix.go test: fix nilptr5 for AIX 2018-11-27 15:36:08 +00:00
nilptr5_wasm.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nilptr5.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nilptr_aix.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nilptr.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nosplit.go ../test: set GOPATH in nosplit.go 2019-03-12 20:46:29 +00:00
notinheap2.go
notinheap3.go cmd/compile: omit write barriers for slice clears of go:notinheap pointers 2018-12-05 21:54:54 +00:00
notinheap.go cmd/compile: disallow converting string to notinheap slice 2018-11-02 19:53:59 +00:00
nowritebarrier.go
nul1.go
oldescape2.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape2n.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape5.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape_calls.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape_closure.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape_field.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape_iface.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape_linkname.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape_param.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
oldescape_struct_return.go cmd/compile: update escape analysis tests for newescape 2019-04-16 16:20:39 +00:00
opt_branchlikely.go
parentype.go
peano.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
phiopt.go
print.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
print.out
printbig.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
printbig.out
prove.go cmd/compile: make prove learn index >= 0 from successful bounds checks 2019-03-30 23:22:02 +00:00
range.go
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
recover5.go
recover.go
reflectmethod1.go
reflectmethod2.go
reflectmethod3.go
reflectmethod4.go
rename1.go
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 cmd/compile: shortcut intrinsic inlining AFTER getcallerXX check 2019-04-19 20:18:29 +00:00
rune.go
runtime.go
shift1.go
shift2.go
sieve.go
sigchld.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
sigchld.out
simassign.go
sinit_run.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
sinit.go cmd/compile: fix static initializer 2018-12-03 16:48:21 +00:00
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
stackobj2.go test: stress test for stack objects 2018-10-03 19:54:29 +00:00
stackobj3.go cmd/compile,runtime: remove ambiguously live logic 2018-10-03 19:54:16 +00:00
stackobj.go cmd/compile,runtime: remove ambiguously live logic 2018-10-03 19:54:16 +00:00
strcopy.go test: add test to verify that string copies don't get optimized away 2018-06-12 19:10:34 +00:00
strength.go
string_lit.go
stringrange.go
struct0.go
switch2.go
switch3.go
switch4.go
switch5.go Revert "fmt: fix incorrect format of whole-number floats when using %#v" 2018-10-16 21:54:35 +00:00
switch6.go
switch7.go
switch.go
tinyfin.go
torture.go
turing.go
typecheck.go
typecheckloop.go
typeswitch1.go
typeswitch2.go test: fix spelling of caught be the compiler to caught by the compiler 2018-10-04 00:49:49 +00:00
typeswitch3.go test: fix spelling of caught be the compiler to caught by the compiler 2018-10-04 00:49:49 +00:00
typeswitch.go
uintptrescapes2.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
uintptrescapes.go
undef.go
utf.go
varerr.go
varinit.go
writebarrier.go cmd/compile: better write barrier removal when initializing new objects 2019-03-18 21:16:19 +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.