cmd/internal/obj/ppc64: support for decimal floating point instructions

1. Support for decimal arithmetic quad instructions of powerpc: DADDQ, DSUBQ, DMULQ
and DDIVQ.
2. Support for decimal compare ordered, unordered,  quad instructions of powerpc:
DCMPU, DCMPO, DCMPUQ, and DCMPOQ.
Change-Id: I32a15a7f0a127b022b1f43d376e0ab0f7e9dd108
Cq-Include-Trybots: luci.golang.try:gotip-linux-ppc64_power10,gotip-linux-ppc64_power8,gotip-linux-ppc64le_power8,gotip-linux-ppc64le_power9,gotip-linux-ppc64le_power10
Reviewed-on: https://go-review.googlesource.com/c/go/+/623036
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Paul Murphy <murp@ibm.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Paul Murphy <murp@ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>

3 files changed, 50 insertions, 0 deletions

diff --git a/src/cmd/internal/obj/ppc64/a.out.go b/src/cmd/internal/obj/ppc64/a.out.go
index 0c980ef476..aa7bcd3068 100644
--- a/src/cmd/internal/obj/ppc64/a.out.go
+++ b/src/cmd/internal/obj/ppc64/a.out.go
@@ -506,7 +506,13 @@ const (
 	ACRORN
 	ACRXOR
 	ADADD
+	ADADDQ
+	ADCMPO
+	ADCMPOQ
+	ADCMPU
+	ADCMPUQ
 	ADDIV
+	ADDIVQ
 	ADIVW
 	ADIVWCC
 	ADIVWVCC
@@ -516,7 +522,9 @@ const (
 	ADIVWUVCC
 	ADIVWUV
 	ADMUL
+	ADMULQ
 	ADSUB
+	ADSUBQ
 	AMODUD
 	AMODUW
 	AMODSD
diff --git a/src/cmd/internal/obj/ppc64/anames.go b/src/cmd/internal/obj/ppc64/anames.go
index f9ec191551..ebcdc95cb5 100644
--- a/src/cmd/internal/obj/ppc64/anames.go
+++ b/src/cmd/internal/obj/ppc64/anames.go
@@ -58,7 +58,13 @@ var Anames = []string{
 	"CRORN",
 	"CRXOR",
 	"DADD",
+	"DADDQ",
+	"DCMPO",
+	"DCMPOQ",
+	"DCMPU",
+	"DCMPUQ",
 	"DDIV",
+	"DDIVQ",
 	"DIVW",
 	"DIVWCC",
 	"DIVWVCC",
@@ -68,7 +74,9 @@ var Anames = []string{
 	"DIVWUVCC",
 	"DIVWUV",
 	"DMUL",
+	"DMULQ",
 	"DSUB",
+	"DSUBQ",
 	"MODUD",
 	"MODUW",
 	"MODSD",
diff --git a/src/cmd/internal/obj/ppc64/asm9.go b/src/cmd/internal/obj/ppc64/asm9.go
index a9ef420e3d..b30976c85d 100644
--- a/src/cmd/internal/obj/ppc64/asm9.go
+++ b/src/cmd/internal/obj/ppc64/asm9.go
@@ -199,11 +199,15 @@ var optabBase = []Optab{
 	{as: ARLDCL, a1: C_REG, a3: C_32CON, a6: C_REG, type_: 14, size: 4},
 	{as: AFADD, a1: C_FREG, a6: C_FREG, type_: 2, size: 4},
 	{as: AFADD, a1: C_FREG, a2: C_FREG, a6: C_FREG, type_: 2, size: 4},
+	{as: ADADDQ, a1: C_FREGP, a6: C_FREGP, type_: 2, size: 4},
+	{as: ADADDQ, a1: C_FREGP, a2: C_FREGP, a6: C_FREGP, type_: 2, size: 4},
 	{as: AFABS, a1: C_FREG, a6: C_FREG, type_: 33, size: 4},
 	{as: AFABS, a6: C_FREG, type_: 33, size: 4},
 	{as: AFMADD, a1: C_FREG, a2: C_FREG, a3: C_FREG, a6: C_FREG, type_: 34, size: 4},
 	{as: AFMUL, a1: C_FREG, a6: C_FREG, type_: 32, size: 4},
 	{as: AFMUL, a1: C_FREG, a2: C_FREG, a6: C_FREG, type_: 32, size: 4},
+	{as: ADMULQ, a1: C_FREGP, a6: C_FREGP, type_: 32, size: 4},
+	{as: ADMULQ, a1: C_FREGP, a2: C_FREGP, a6: C_FREGP, type_: 32, size: 4},
 
 	{as: AMOVBU, a1: C_REG, a6: C_SOREG, type_: 7, size: 4},
 	{as: AMOVBU, a1: C_REG, a6: C_XOREG, type_: 108, size: 4},
@@ -481,6 +485,8 @@ var optabBase = []Optab{
 	{as: ACMPU, a1: C_REG, a2: C_CREG, a6: C_U16CON, type_: 70, size: 4},
 	{as: AFCMPO, a1: C_FREG, a6: C_FREG, type_: 70, size: 4},
 	{as: AFCMPO, a1: C_FREG, a2: C_CREG, a6: C_FREG, type_: 70, size: 4},
+	{as: ADCMPOQ, a1: C_FREGP, a6: C_FREGP, type_: 70, size: 4},
+	{as: ADCMPOQ, a1: C_FREGP, a2: C_CREG, a6: C_FREGP, type_: 70, size: 4},
 	{as: ATW, a1: C_32CON, a2: C_REG, a6: C_REG, type_: 60, size: 4},
 	{as: ATW, a1: C_32CON, a2: C_REG, a6: C_S16CON, type_: 61, size: 4},
 	{as: ADCBF, a1: C_SOREG, type_: 43, size: 4},
@@ -1876,6 +1882,10 @@ func buildop(ctxt *obj.Link) {
 			opset(ADDIV, r0)
 			opset(ADSUB, r0)
 
+		case ADADDQ:
+			opset(ADDIVQ, r0)
+			opset(ADSUBQ, r0)
+
 		case AFMADD:
 			opset(AFMADDCC, r0)
 			opset(AFMADDS, r0)
@@ -1901,8 +1911,16 @@ func buildop(ctxt *obj.Link) {
 			opset(AFMULSCC, r0)
 			opset(ADMUL, r0)
 
+		case ADMULQ:
+			opset(ADMULQ, r0)
+
 		case AFCMPO:
 			opset(AFCMPU, r0)
+			opset(ADCMPU, r0)
+			opset(ADCMPO, r0)
+
+		case ADCMPOQ:
+			opset(ADCMPUQ, r0)
 
 		case AMTFSB0:
 			opset(AMTFSB0CC, r0)
@@ -4008,6 +4026,22 @@ func (c *ctxt9) oprrr(a obj.As) uint32 {
 		return OPVCC(59, 34, 0, 0)
 	case ADSUB:
 		return OPVCC(59, 514, 0, 0)
+	case ADADDQ:
+		return OPVCC(63, 2, 0, 0)
+	case ADDIVQ:
+		return OPVCC(63, 546, 0, 0)
+	case ADMULQ:
+		return OPVCC(63, 34, 0, 0)
+	case ADSUBQ:
+		return OPVCC(63, 514, 0, 0)
+	case ADCMPU:
+		return OPVCC(59, 642, 0, 0)
+	case ADCMPUQ:
+		return OPVCC(63, 642, 0, 0)
+	case ADCMPO:
+		return OPVCC(59, 130, 0, 0)
+	case ADCMPOQ:
+		return OPVCC(63, 130, 0, 0)
 
 	case ADCBF:
 		return OPVCC(31, 86, 0, 0)