make runtime compatible with wasm

runtime/internal/lib/internal/abi/abi.go

@@ -22,9 +22,6 @@ import (
 	"github.com/goplus/llgo/runtime/abi"
 )
 
-// llgo:skipall
-type _abi struct{}
-
 type InterfaceType = abi.InterfaceType
 
 func NoEscape(p unsafe.Pointer) unsafe.Pointer {

runtime/internal/lib/internal/chacha8rand/chcha8.go

@@ -0,0 +1,185 @@
+package chacha8rand
+
+import (
+	"unsafe"
+
+	"github.com/goplus/llgo/runtime/internal/runtime/goarch"
+)
+
+func block(seed *[4]uint64, blocks *[32]uint64, counter uint32) {
+	block_generic(seed, blocks, counter)
+}
+
+// setup sets up 4 ChaCha8 blocks in b32 with the counter and seed.
+// Note that b32 is [16][4]uint32 not [4][16]uint32: the blocks are interlaced
+// the same way they would be in a 4-way SIMD implementations.
+func setup(seed *[4]uint64, b32 *[16][4]uint32, counter uint32) {
+	// Convert to uint64 to do half as many stores to memory.
+	b := (*[16][2]uint64)(unsafe.Pointer(b32))
+
+	// Constants; same as in ChaCha20: "expand 32-byte k"
+	b[0][0] = 0x61707865_61707865
+	b[0][1] = 0x61707865_61707865
+
+	b[1][0] = 0x3320646e_3320646e
+	b[1][1] = 0x3320646e_3320646e
+
+	b[2][0] = 0x79622d32_79622d32
+	b[2][1] = 0x79622d32_79622d32
+
+	b[3][0] = 0x6b206574_6b206574
+	b[3][1] = 0x6b206574_6b206574
+
+	// Seed values.
+	var x64 uint64
+	var x uint32
+
+	x = uint32(seed[0])
+	x64 = uint64(x)<<32 | uint64(x)
+	b[4][0] = x64
+	b[4][1] = x64
+
+	x = uint32(seed[0] >> 32)
+	x64 = uint64(x)<<32 | uint64(x)
+	b[5][0] = x64
+	b[5][1] = x64
+
+	x = uint32(seed[1])
+	x64 = uint64(x)<<32 | uint64(x)
+	b[6][0] = x64
+	b[6][1] = x64
+
+	x = uint32(seed[1] >> 32)
+	x64 = uint64(x)<<32 | uint64(x)
+	b[7][0] = x64
+	b[7][1] = x64
+
+	x = uint32(seed[2])
+	x64 = uint64(x)<<32 | uint64(x)
+	b[8][0] = x64
+	b[8][1] = x64
+
+	x = uint32(seed[2] >> 32)
+	x64 = uint64(x)<<32 | uint64(x)
+	b[9][0] = x64
+	b[9][1] = x64
+
+	x = uint32(seed[3])
+	x64 = uint64(x)<<32 | uint64(x)
+	b[10][0] = x64
+	b[10][1] = x64
+
+	x = uint32(seed[3] >> 32)
+	x64 = uint64(x)<<32 | uint64(x)
+	b[11][0] = x64
+	b[11][1] = x64
+
+	// Counters.
+	if goarch.BigEndian {
+		b[12][0] = uint64(counter+0)<<32 | uint64(counter+1)
+		b[12][1] = uint64(counter+2)<<32 | uint64(counter+3)
+	} else {
+		b[12][0] = uint64(counter+0) | uint64(counter+1)<<32
+		b[12][1] = uint64(counter+2) | uint64(counter+3)<<32
+	}
+
+	// Zeros.
+	b[13][0] = 0
+	b[13][1] = 0
+	b[14][0] = 0
+	b[14][1] = 0
+
+	b[15][0] = 0
+	b[15][1] = 0
+}
+
+// block_generic is the non-assembly block implementation,
+// for use on systems without special assembly.
+// Even on such systems, it is quite fast: on GOOS=386,
+// ChaCha8 using this code generates random values faster than PCG-DXSM.
+func block_generic(seed *[4]uint64, buf *[32]uint64, counter uint32) {
+	b := (*[16][4]uint32)(unsafe.Pointer(buf))
+
+	setup(seed, b, counter)
+
+	for i := range b[0] {
+		// Load block i from b[*][i] into local variables.
+		b0 := b[0][i]
+		b1 := b[1][i]
+		b2 := b[2][i]
+		b3 := b[3][i]
+		b4 := b[4][i]
+		b5 := b[5][i]
+		b6 := b[6][i]
+		b7 := b[7][i]
+		b8 := b[8][i]
+		b9 := b[9][i]
+		b10 := b[10][i]
+		b11 := b[11][i]
+		b12 := b[12][i]
+		b13 := b[13][i]
+		b14 := b[14][i]
+		b15 := b[15][i]
+
+		// 4 iterations of eight quarter-rounds each is 8 rounds
+		for round := 0; round < 4; round++ {
+			b0, b4, b8, b12 = qr(b0, b4, b8, b12)
+			b1, b5, b9, b13 = qr(b1, b5, b9, b13)
+			b2, b6, b10, b14 = qr(b2, b6, b10, b14)
+			b3, b7, b11, b15 = qr(b3, b7, b11, b15)
+
+			b0, b5, b10, b15 = qr(b0, b5, b10, b15)
+			b1, b6, b11, b12 = qr(b1, b6, b11, b12)
+			b2, b7, b8, b13 = qr(b2, b7, b8, b13)
+			b3, b4, b9, b14 = qr(b3, b4, b9, b14)
+		}
+
+		// Store block i back into b[*][i].
+		// Add b4..b11 back to the original key material,
+		// like in ChaCha20, to avoid trivial invertibility.
+		// There is no entropy in b0..b3 and b12..b15
+		// so we can skip the additions and save some time.
+		b[0][i] = b0
+		b[1][i] = b1
+		b[2][i] = b2
+		b[3][i] = b3
+		b[4][i] += b4
+		b[5][i] += b5
+		b[6][i] += b6
+		b[7][i] += b7
+		b[8][i] += b8
+		b[9][i] += b9
+		b[10][i] += b10
+		b[11][i] += b11
+		b[12][i] = b12
+		b[13][i] = b13
+		b[14][i] = b14
+		b[15][i] = b15
+	}
+
+	if goarch.BigEndian {
+		// On a big-endian system, reading the uint32 pairs as uint64s
+		// will word-swap them compared to little-endian, so we word-swap
+		// them here first to make the next swap get the right answer.
+		for i, x := range buf {
+			buf[i] = x>>32 | x<<32
+		}
+	}
+}
+
+// qr is the (inlinable) ChaCha8 quarter round.
+func qr(a, b, c, d uint32) (_a, _b, _c, _d uint32) {
+	a += b
+	d ^= a
+	d = d<<16 | d>>16
+	c += d
+	b ^= c
+	b = b<<12 | b>>20
+	a += b
+	d ^= a
+	d = d<<8 | d>>24
+	c += d
+	b ^= c
+	b = b<<7 | b>>25
+	return a, b, c, d
+}

runtime/internal/lib/internal/cpu/_wrap/cpu_x86.c

@@ -0,0 +1,21 @@
+#if defined(__GNUC__) || defined(__clang__)
+void llgo_getcpuid(unsigned int eax, unsigned int ecx,
+                   unsigned int *a, unsigned int *b,
+                   unsigned int *c, unsigned int *d)
+{
+#if defined(__i386__) || defined(__x86_64__)
+    __asm__ __volatile__(
+        "pushq %%rbp\n\t"
+        "movq %%rsp, %%rbp\n\t"
+        "andq $-16, %%rsp\n\t" // 16-byte align stack
+        "cpuid\n\t"
+        "movq %%rbp, %%rsp\n\t"
+        "popq %%rbp\n\t"
+        : "=a"(*a), "=b"(*b), "=c"(*c), "=d"(*d)
+        : "a"(eax), "c"(ecx)
+        : "memory");
+#endif
+}
+#else
+#error This code requires GCC or Clang
+#endif

runtime/internal/lib/internal/cpu/cpu_x86.go

@@ -2,39 +2,28 @@
 
 package cpu
 
-/*
-#if defined(__GNUC__) || defined(__clang__)
-    static void getcpuid(unsigned int eax, unsigned int ecx,
-                        unsigned int *a, unsigned int *b,
-                        unsigned int *c, unsigned int *d) {
-    #if defined(__i386__) || defined(__x86_64__)
-        __asm__ __volatile__(
-            "pushq %%rbp\n\t"
-            "movq %%rsp, %%rbp\n\t"
-            "andq $-16, %%rsp\n\t"  // 16-byte align stack
-            "cpuid\n\t"
-            "movq %%rbp, %%rsp\n\t"
-            "popq %%rbp\n\t"
-            : "=a"(*a), "=b"(*b), "=c"(*c), "=d"(*d)
-            : "a"(eax), "c"(ecx)
-            : "memory"
-        );
-    #endif
-    }
-#else
-    #error This code requires GCC or Clang
-#endif
-*/
-import "C"
+import (
+	_ "unsafe"
+
+	c "github.com/goplus/llgo/runtime/internal/clite"
+)
+
+const (
+	LLGoPackage = "link"
+	LLGoFiles   = "_wrap/cpu_x86.c"
+)
+
+//go:linkname c_getcpuid C.llgo_getcpuid
+func c_getcpuid(eaxArg, ecxArg uint32, eax, ebx, ecx, edx *c.Uint)
 
 func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32) {
-	C.getcpuid(
-		C.uint(eaxArg),
-		C.uint(ecxArg),
-		(*C.uint)(&eax),
-		(*C.uint)(&ebx),
-		(*C.uint)(&ecx),
-		(*C.uint)(&edx),
+	c_getcpuid(
+		c.Uint(eaxArg),
+		c.Uint(ecxArg),
+		(*c.Uint)(&eax),
+		(*c.Uint)(&ebx),
+		(*c.Uint)(&ecx),
+		(*c.Uint)(&edx),
 	)
 	return
 }

runtime/internal/lib/internal/goarch/gengoarch.go

@@ -0,0 +1,60 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build ignore
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+)
+
+var goarches []string
+
+func main() {
+	data, err := os.ReadFile("../../internal/syslist/syslist.go")
+	if err != nil {
+		log.Fatal(err)
+	}
+	const goarchPrefix = `var KnownArch = map[string]bool{`
+	inGOARCH := false
+	for _, line := range strings.Split(string(data), "\n") {
+		if strings.HasPrefix(line, goarchPrefix) {
+			inGOARCH = true
+		} else if inGOARCH && strings.HasPrefix(line, "}") {
+			break
+		} else if inGOARCH {
+			goarch := strings.Fields(line)[0]
+			goarch = strings.TrimPrefix(goarch, `"`)
+			goarch = strings.TrimSuffix(goarch, `":`)
+			goarches = append(goarches, goarch)
+		}
+	}
+
+	for _, target := range goarches {
+		if target == "amd64p32" {
+			continue
+		}
+		var buf bytes.Buffer
+		fmt.Fprintf(&buf, "// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.\n\n")
+		fmt.Fprintf(&buf, "//go:build %s\n\n", target) // must explicitly include target for bootstrapping purposes
+		fmt.Fprintf(&buf, "package goarch\n\n")
+		fmt.Fprintf(&buf, "const GOARCH = `%s`\n\n", target)
+		for _, goarch := range goarches {
+			value := 0
+			if goarch == target {
+				value = 1
+			}
+			fmt.Fprintf(&buf, "const Is%s = %d\n", strings.Title(goarch), value)
+		}
+		err := os.WriteFile("zgoarch_"+target+".go", buf.Bytes(), 0666)
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+}

runtime/internal/lib/internal/goarch/goarch.go

@@ -0,0 +1,60 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// package goarch contains GOARCH-specific constants.
+package goarch
+
+// The next line makes 'go generate' write the zgoarch*.go files with
+// per-arch information, including constants named $GOARCH for every
+// GOARCH. The constant is 1 on the current system, 0 otherwise; multiplying
+// by them is useful for defining GOARCH-specific constants.
+//
+//go:generate go run gengoarch.go
+
+type ArchFamilyType int
+
+const (
+	AMD64 ArchFamilyType = iota
+	ARM
+	ARM64
+	I386
+	LOONG64
+	MIPS
+	MIPS64
+	PPC64
+	RISCV64
+	S390X
+	WASM
+)
+
+// PtrSize is the size of a pointer in bytes - unsafe.Sizeof(uintptr(0)) but as an ideal constant.
+// It is also the size of the machine's native word size (that is, 4 on 32-bit systems, 8 on 64-bit).
+const PtrSize = 4 << (^uintptr(0) >> 63)
+
+// ArchFamily is the architecture family (AMD64, ARM, ...)
+const ArchFamily ArchFamilyType = _ArchFamily
+
+// BigEndian reports whether the architecture is big-endian.
+const BigEndian = IsArmbe|IsArm64be|IsMips|IsMips64|IsPpc|IsPpc64|IsS390|IsS390x|IsSparc|IsSparc64 == 1
+
+// DefaultPhysPageSize is the default physical page size.
+const DefaultPhysPageSize = _DefaultPhysPageSize
+
+// PCQuantum is the minimal unit for a program counter (1 on x86, 4 on most other systems).
+// The various PC tables record PC deltas pre-divided by PCQuantum.
+const PCQuantum = _PCQuantum
+
+// Int64Align is the required alignment for a 64-bit integer (4 on 32-bit systems, 8 on 64-bit).
+const Int64Align = PtrSize
+
+// MinFrameSize is the size of the system-reserved words at the bottom
+// of a frame (just above the architectural stack pointer).
+// It is zero on x86 and PtrSize on most non-x86 (LR-based) systems.
+// On PowerPC it is larger, to cover three more reserved words:
+// the compiler word, the link editor word, and the TOC save word.
+const MinFrameSize = _MinFrameSize
+
+// StackAlign is the required alignment of the SP register.
+// The stack must be at least word aligned, but some architectures require more.
+const StackAlign = _StackAlign

runtime/internal/lib/internal/goarch/goarch_386.go

@@ -0,0 +1,13 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = I386
+	_DefaultPhysPageSize = 4096
+	_PCQuantum           = 1
+	_MinFrameSize        = 0
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_amd64.go

@@ -0,0 +1,13 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = AMD64
+	_DefaultPhysPageSize = 4096
+	_PCQuantum           = 1
+	_MinFrameSize        = 0
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_arm.go

@@ -0,0 +1,13 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = ARM
+	_DefaultPhysPageSize = 65536
+	_PCQuantum           = 4
+	_MinFrameSize        = 4
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_arm64.go

@@ -0,0 +1,13 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = ARM64
+	_DefaultPhysPageSize = 65536
+	_PCQuantum           = 4
+	_MinFrameSize        = 8
+	_StackAlign          = 16
+)

runtime/internal/lib/internal/goarch/goarch_loong64.go

@@ -0,0 +1,15 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build loong64
+
+package goarch
+
+const (
+	_ArchFamily          = LOONG64
+	_DefaultPhysPageSize = 16384
+	_PCQuantum           = 4
+	_MinFrameSize        = 8
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_mips.go

@@ -0,0 +1,13 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = MIPS
+	_DefaultPhysPageSize = 65536
+	_PCQuantum           = 4
+	_MinFrameSize        = 4
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_mips64.go

@@ -0,0 +1,13 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = MIPS64
+	_DefaultPhysPageSize = 16384
+	_PCQuantum           = 4
+	_MinFrameSize        = 8
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_mips64le.go

@@ -0,0 +1,13 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = MIPS64
+	_DefaultPhysPageSize = 16384
+	_PCQuantum           = 4
+	_MinFrameSize        = 8
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_mipsle.go

@@ -0,0 +1,13 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = MIPS
+	_DefaultPhysPageSize = 65536
+	_PCQuantum           = 4
+	_MinFrameSize        = 4
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_ppc64.go

@@ -0,0 +1,13 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = PPC64
+	_DefaultPhysPageSize = 65536
+	_PCQuantum           = 4
+	_MinFrameSize        = 32
+	_StackAlign          = 16
+)

runtime/internal/lib/internal/goarch/goarch_ppc64le.go

@@ -0,0 +1,13 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = PPC64
+	_DefaultPhysPageSize = 65536
+	_PCQuantum           = 4
+	_MinFrameSize        = 32
+	_StackAlign          = 16
+)

runtime/internal/lib/internal/goarch/goarch_riscv64.go

@@ -0,0 +1,13 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = RISCV64
+	_DefaultPhysPageSize = 4096
+	_PCQuantum           = 4
+	_MinFrameSize        = 8
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_s390x.go

@@ -0,0 +1,13 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = S390X
+	_DefaultPhysPageSize = 4096
+	_PCQuantum           = 2
+	_MinFrameSize        = 8
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/goarch_wasm.go

@@ -0,0 +1,13 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package goarch
+
+const (
+	_ArchFamily          = WASM
+	_DefaultPhysPageSize = 65536
+	_PCQuantum           = 1
+	_MinFrameSize        = 0
+	_StackAlign          = PtrSize
+)

runtime/internal/lib/internal/goarch/zgoarch_386.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build 386
+
+package goarch
+
+const GOARCH = `386`
+
+const Is386 = 1
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_amd64.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build amd64
+
+package goarch
+
+const GOARCH = `amd64`
+
+const Is386 = 0
+const IsAmd64 = 1
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_arm.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build arm
+
+package goarch
+
+const GOARCH = `arm`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 1
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_arm64.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build arm64
+
+package goarch
+
+const GOARCH = `arm64`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 1
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_arm64be.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build arm64be
+
+package goarch
+
+const GOARCH = `arm64be`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 1
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_armbe.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build armbe
+
+package goarch
+
+const GOARCH = `armbe`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 1
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_loong64.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build loong64
+
+package goarch
+
+const GOARCH = `loong64`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 1
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_mips.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build mips
+
+package goarch
+
+const GOARCH = `mips`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 1
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_mips64.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build mips64
+
+package goarch
+
+const GOARCH = `mips64`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 1
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_mips64le.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build mips64le
+
+package goarch
+
+const GOARCH = `mips64le`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 1
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_mips64p32.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build mips64p32
+
+package goarch
+
+const GOARCH = `mips64p32`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 1
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_mips64p32le.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build mips64p32le
+
+package goarch
+
+const GOARCH = `mips64p32le`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 1
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_mipsle.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build mipsle
+
+package goarch
+
+const GOARCH = `mipsle`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 1
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_ppc.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build ppc
+
+package goarch
+
+const GOARCH = `ppc`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 1
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_ppc64.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build ppc64
+
+package goarch
+
+const GOARCH = `ppc64`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 1
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_ppc64le.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build ppc64le
+
+package goarch
+
+const GOARCH = `ppc64le`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 1
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_riscv.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build riscv
+
+package goarch
+
+const GOARCH = `riscv`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 1
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_riscv64.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build riscv64
+
+package goarch
+
+const GOARCH = `riscv64`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 1
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_s390.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build s390
+
+package goarch
+
+const GOARCH = `s390`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 1
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_s390x.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build s390x
+
+package goarch
+
+const GOARCH = `s390x`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 1
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_sparc.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build sparc
+
+package goarch
+
+const GOARCH = `sparc`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 1
+const IsSparc64 = 0
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_sparc64.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build sparc64
+
+package goarch
+
+const GOARCH = `sparc64`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 1
+const IsWasm = 0

runtime/internal/lib/internal/goarch/zgoarch_wasm.go

@@ -0,0 +1,32 @@
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
+
+//go:build wasm
+
+package goarch
+
+const GOARCH = `wasm`
+
+const Is386 = 0
+const IsAmd64 = 0
+const IsAmd64p32 = 0
+const IsArm = 0
+const IsArmbe = 0
+const IsArm64 = 0
+const IsArm64be = 0
+const IsLoong64 = 0
+const IsMips = 0
+const IsMipsle = 0
+const IsMips64 = 0
+const IsMips64le = 0
+const IsMips64p32 = 0
+const IsMips64p32le = 0
+const IsPpc = 0
+const IsPpc64 = 0
+const IsPpc64le = 0
+const IsRiscv = 0
+const IsRiscv64 = 0
+const IsS390 = 0
+const IsS390x = 0
+const IsSparc = 0
+const IsSparc64 = 0
+const IsWasm = 1

runtime/internal/lib/internal/oserror/errors.go

@@ -7,15 +7,17 @@
 // These types are defined here to permit the syscall package to reference them.
 package oserror
 
-import "errors"
+import (
+	"github.com/goplus/llgo/runtime/internal/clite/syscall"
+)
 
 // llgo:skipall
 type _oserror struct{}
 
 var (
-	ErrInvalid    = errors.New("invalid argument")
-	ErrPermission = errors.New("permission denied")
-	ErrExist      = errors.New("file already exists")
-	ErrNotExist   = errors.New("file does not exist")
-	ErrClosed     = errors.New("file already closed")
+	ErrInvalid    = syscall.ErrInvalid
+	ErrPermission = syscall.ErrPermission
+	ErrExist      = syscall.ErrExist
+	ErrNotExist   = syscall.ErrNotExist
+	ErrClosed     = syscall.ErrClosed
 )

runtime/internal/lib/internal/runtime/atomic/atomic.go

@@ -0,0 +1,19 @@
+package atomic
+
+import (
+	"unsafe"
+
+	"github.com/goplus/llgo/runtime/internal/lib/sync/atomic"
+)
+
+func casPointer(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool {
+	return atomic.CompareAndSwapPointer(ptr, old, new)
+}
+
+func storePointer(ptr *unsafe.Pointer, new unsafe.Pointer) {
+	atomic.StorePointer(ptr, new)
+}
+
+func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) {
+	atomic.StorePointer((*unsafe.Pointer)(ptr), val)
+}

runtime/internal/lib/internal/runtime/maps/maps.go

@@ -0,0 +1,50 @@
+package maps
+
+import (
+	"unsafe"
+
+	"github.com/goplus/llgo/runtime/abi"
+)
+
+func rand() uint64 {
+	panic("not implemented")
+}
+
+func fatal(s string) {
+	panic("fatal: " + s)
+}
+
+type Type = abi.Type
+
+type SwissMapType struct {
+	Type
+	Key   *Type
+	Elem  *Type
+	Group *Type // internal type representing a slot group
+	// function for hashing keys (ptr to key, seed) -> hash
+	Hasher    func(unsafe.Pointer, uintptr) uintptr
+	GroupSize uintptr // == Group.Size_
+	SlotSize  uintptr // size of key/elem slot
+	ElemOff   uintptr // offset of elem in key/elem slot
+	Flags     uint32
+}
+
+func mapKeyError(typ *SwissMapType, p unsafe.Pointer) error {
+	return nil
+}
+
+func typedmemmove(typ *abi.Type, dst, src unsafe.Pointer) {
+	panic("not implemented")
+}
+
+func typedmemclr(typ *abi.Type, ptr unsafe.Pointer) {
+	panic("not implemented")
+}
+
+func newobject(typ *abi.Type) unsafe.Pointer {
+	panic("not implemented")
+}
+
+func newarray(typ *abi.Type, n int) unsafe.Pointer {
+	panic("not implemented")
+}

runtime/internal/lib/internal/runtime/sys/sys.go

@@ -0,0 +1,5 @@
+package sys
+
+func GetCallerPC() uintptr {
+	panic("not implemented")
+}

runtime/internal/lib/internal/sync/sync.go

@@ -0,0 +1,29 @@
+package sync
+
+func runtime_canSpin(i int) bool {
+	panic("not implemented")
+}
+
+func runtime_doSpin() {
+	panic("not implemented")
+}
+
+func throw(string) {
+	panic("not implemented")
+}
+
+func fatal(string) {
+	panic("not implemented")
+}
+
+func runtime_nanotime() int64 {
+	panic("not implemented")
+}
+
+func runtime_SemacquireMutex(s *uint32, lifo bool, skipframes int) {
+	panic("not implemented")
+}
+
+func runtime_Semrelease(s *uint32, handoff bool, skipframes int) {
+	panic("not implemented")
+}

runtime/internal/lib/internal/syscall/unix/nonblocking_unix.go

@@ -0,0 +1,21 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build unix
+
+package unix
+
+import "syscall"
+
+func IsNonblock(fd int) (nonblocking bool, err error) {
+	flag, e1 := Fcntl(fd, syscall.F_GETFL, 0)
+	if e1 != nil {
+		return false, e1
+	}
+	return flag&syscall.O_NONBLOCK != 0, nil
+}
+
+func HasNonblockFlag(flag int) bool {
+	return flag&syscall.O_NONBLOCK != 0
+}

runtime/internal/lib/internal/syscall/unix/nonblocking_wasm.go

@@ -0,0 +1,17 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package unix
+
+import (
+	_ "unsafe" // for go:linkname
+)
+
+func IsNonblock(fd int) (nonblocking bool, err error) {
+	panic("not implemented")
+}
+
+func HasNonblockFlag(flag int) bool {
+	panic("not implemented")
+}

runtime/internal/lib/internal/syscall/unix/unix.go

@@ -17,10 +17,8 @@
 package unix
 
 import (
-	"syscall"
 	_ "unsafe"
 )
 
-func HasNonblockFlag(flag int) bool {
-	return flag&syscall.O_NONBLOCK != 0
-}
+// llgo:skip path_filestat_get path_create_directory path_readlink path_unlink_file path_remove_directory Fstatat Mkdirat Readlinkat Unlinkat
+type _unix struct{}