From: Xiaolin Zhao <zhaoxiaolin@loongson.cn>
Date: Wed, 10 Apr 2024 03:37:56 +0000 (+0800)
Subject: cmd/internal/obj/loong64: add support for instructions F{MAX/NIN}.{S/D}
X-Git-Tag: go1.24rc1~1292
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=e7619216888cdd25e445d06bc424532a922fdf94;p=gostls13.git

cmd/internal/obj/loong64: add support for instructions F{MAX/NIN}.{S/D}

Go asm syntax:
	F{MAX/MIN}{F/D}		FK, FJ, FD

Equivalent platform assembler syntax:
	f{max/min}.{s/d}	fd, fj, fk

Ref: https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html

Change-Id: Ib11fed1fe3700be5ebba33b5818661c4071b7b7c
Reviewed-on: https://go-review.googlesource.com/c/go/+/590676
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: abner chenc <chenguoqi@loongson.cn>
---

diff --git a/src/cmd/asm/internal/asm/testdata/loong64enc1.s b/src/cmd/asm/internal/asm/testdata/loong64enc1.s
index e648d178dd..e16bd78fee 100644
--- a/src/cmd/asm/internal/asm/testdata/loong64enc1.s
+++ b/src/cmd/asm/internal/asm/testdata/loong64enc1.s
@@ -269,3 +269,12 @@ lable2:
 	AMMAXDBVU	R14, (R13), R12 // acb97038
 	AMMINDBWU	R14, (R13), R12 // ac397138
 	AMMINDBVU	R14, (R13), R12 // acb97138
+
+	FMINF	F4, F5, F6		// a6900a01
+	FMINF	F4, F5			// a5900a01
+	FMIND	F4, F5, F6		// a6100b01
+	FMIND	F4, F5			// a5100b01
+	FMAXF	F4, F5, F6		// a6900801
+	FMAXF	F4, F5			// a5900801
+	FMAXD	F4, F5, F6		// a6100901
+	FMAXD	F4, F5			// a5100901
diff --git a/src/cmd/internal/obj/loong64/a.out.go b/src/cmd/internal/obj/loong64/a.out.go
index cf5c74fde2..9309a3b09a 100644
--- a/src/cmd/internal/obj/loong64/a.out.go
+++ b/src/cmd/internal/obj/loong64/a.out.go
@@ -440,6 +440,12 @@ const (
 	ARDTIMED
 	ACPUCFG
 
+	// 3.2.1.3
+	AFMINF
+	AFMIND
+	AFMAXF
+	AFMAXD
+
 	ALAST
 
 	// aliases
diff --git a/src/cmd/internal/obj/loong64/anames.go b/src/cmd/internal/obj/loong64/anames.go
index 9bfc57e239..42d9ea4d18 100644
--- a/src/cmd/internal/obj/loong64/anames.go
+++ b/src/cmd/internal/obj/loong64/anames.go
@@ -179,5 +179,9 @@ var Anames = []string{
 	"RDTIMEHW",
 	"RDTIMED",
 	"CPUCFG",
+	"FMINF",
+	"FMIND",
+	"FMAXF",
+	"FMAXD",
 	"LAST",
 }
diff --git a/src/cmd/internal/obj/loong64/asm.go b/src/cmd/internal/obj/loong64/asm.go
index 8c9ff2096e..c0f9dee380 100644
--- a/src/cmd/internal/obj/loong64/asm.go
+++ b/src/cmd/internal/obj/loong64/asm.go
@@ -1052,6 +1052,10 @@ func buildop(ctxt *obj.Link) {
 			opset(ASUBF, r0)
 			opset(ASUBD, r0)
 			opset(AADDD, r0)
+			opset(AFMINF, r0)
+			opset(AFMIND, r0)
+			opset(AFMAXF, r0)
+			opset(AFMAXD, r0)
 
 		case AAND:
 			opset(AOR, r0)
@@ -1872,6 +1876,14 @@ func (c *ctxt0) oprrr(a obj.As) uint32 {
 		return 0x0c2<<20 | 0x3<<15 // FCMP.SLT.D
 	case ACMPGTF:
 		return 0x0c1<<20 | 0x3<<15 // FCMP.SLT.S
+	case AFMINF:
+		return 0x215 << 15 // fmin.s
+	case AFMIND:
+		return 0x216 << 15 // fmin.d
+	case AFMAXF:
+		return 0x211 << 15 // fmax.s
+	case AFMAXD:
+		return 0x212 << 15 // fmax.d
 	}
 
 	if a < 0 {