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cmd/compile/internal: intrinsify publicationBarrier on ppc64x

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This enables publicationBarrier to be used as an intrinsic
on ppc64le/ppc64.

A call to this appears in test/bench/go1 BinaryTree17

Change-Id: If53528a82de99688270473cbe23472f37046ad65
Reviewed-on: https://go-review.googlesource.com/c/go/+/404056
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Lynn Boger 2022-05-04 10:07:38 -05:00
parent 6269dc29a0
commit c9f67c289f
6 changed files with 20 additions and 1 deletions
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4
src/cmd/compile/internal/ppc64/ssa.go
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@ -468,6 +468,10 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
p8 := s.Prog(obj.ANOP)
p6.To.SetTarget(p8)
case ssa.OpPPC64LoweredPubBarrier:
// LWSYNC
s.Prog(v.Op.Asm())
case ssa.OpPPC64LoweredGetClosurePtr:
// Closure pointer is R11 (already)
ssagen.CheckLoweredGetClosurePtr(v)

3
src/cmd/compile/internal/ssa/gen/PPC64.rules
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@ -687,6 +687,9 @@
// Write barrier.
(WB ...) => (LoweredWB ...)
// Publication barrier as intrinsic
(PubBarrier ...) => (LoweredPubBarrier ...)
(PanicBounds [kind] x y mem) && boundsABI(kind) == 0 => (LoweredPanicBoundsA [kind] x y mem)
(PanicBounds [kind] x y mem) && boundsABI(kind) == 1 => (LoweredPanicBoundsB [kind] x y mem)
(PanicBounds [kind] x y mem) && boundsABI(kind) == 2 => (LoweredPanicBoundsC [kind] x y mem)

1
src/cmd/compile/internal/ssa/gen/PPC64Ops.go
View File

@ -686,6 +686,7 @@ func init() {
// but may clobber anything else, including R31 (REGTMP).
{name: "LoweredWB", argLength: 3, reg: regInfo{inputs: []regMask{buildReg("R20"), buildReg("R21")}, clobbers: (callerSave &^ buildReg("R0 R3 R4 R5 R6 R7 R8 R9 R10 R14 R15 R16 R17 R20 R21 g")) | buildReg("R31")}, clobberFlags: true, aux: "Sym", symEffect: "None"},
{name: "LoweredPubBarrier", argLength: 1, asm: "LWSYNC", hasSideEffects: true}, // Do data barrier. arg0=memory
// There are three of these functions so that they can have three different register inputs.
// When we check 0 <= c <= cap (A), then 0 <= b <= c (B), then 0 <= a <= b (C), we want the
// default registers to match so we don't need to copy registers around unnecessarily.

8
src/cmd/compile/internal/ssa/opGen.go
View File

@ -2138,6 +2138,7 @@ const (
OpPPC64LoweredAtomicOr8
OpPPC64LoweredAtomicOr32
OpPPC64LoweredWB
OpPPC64LoweredPubBarrier
OpPPC64LoweredPanicBoundsA
OpPPC64LoweredPanicBoundsB
OpPPC64LoweredPanicBoundsC
@ -28775,6 +28776,13 @@ var opcodeTable = [...]opInfo{
clobbers: 18446744072632408064, // R11 R12 R18 R19 R22 R23 R24 R25 R26 R27 R28 R29 R31 F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 F27 F28 F29 F30 XER
},
},
{
name: "LoweredPubBarrier",
argLen: 1,
hasSideEffects: true,
asm: ppc64.ALWSYNC,
reg: regInfo{},
},
{
name: "LoweredPanicBoundsA",
auxType: auxInt64,

3
src/cmd/compile/internal/ssa/rewritePPC64.go
View File

@ -643,6 +643,9 @@ func rewriteValuePPC64(v *Value) bool {
return rewriteValuePPC64_OpPrefetchCache(v)
case OpPrefetchCacheStreamed:
return rewriteValuePPC64_OpPrefetchCacheStreamed(v)
case OpPubBarrier:
v.Op = OpPPC64LoweredPubBarrier
return true
case OpRotateLeft16:
return rewriteValuePPC64_OpRotateLeft16(v)
case OpRotateLeft32:

2
src/cmd/compile/internal/ssagen/ssa.go
View File

@ -3951,7 +3951,7 @@ func InitTables() {
s.vars[memVar] = s.newValue1(ssa.OpPubBarrier, types.TypeMem, s.mem())
return nil
},
sys.ARM64)
sys.ARM64, sys.PPC64)
/******** runtime/internal/sys ********/
addF("runtime/internal/sys", "Ctz32",