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wasm-unknown: add math and memory builtins that LLVM needs
This new library is needed for wasm targets that aren't WASI and don't need/want a libc, but still need some intrinsics that are generated by LLVM.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| package builder | ||
|
|
||
| import ( | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/tinygo-org/tinygo/goenv" | ||
| ) | ||
|
|
||
| var WasmBuiltins = Library{ | ||
| name: "wasmbuiltins", | ||
| makeHeaders: func(target, includeDir string) error { | ||
| os.Mkdir(includeDir+"/bits", 0o777) | ||
| f, err := os.Create(includeDir + "/bits/alltypes.h") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if _, err := f.Write([]byte(wasmAllTypes)); err != nil { | ||
| return err | ||
| } | ||
| return f.Close() | ||
| }, | ||
| cflags: func(target, headerPath string) []string { | ||
| libcDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/wasi-libc") | ||
| return []string{ | ||
| "-Werror", | ||
| "-Wall", | ||
| "-std=gnu11", | ||
| "-nostdlibinc", | ||
| "-isystem", libcDir + "/libc-top-half/musl/arch/wasm32", | ||
| "-isystem", libcDir + "/libc-top-half/musl/arch/generic", | ||
| "-isystem", libcDir + "/libc-top-half/musl/src/internal", | ||
| "-isystem", libcDir + "/libc-top-half/musl/src/include", | ||
| "-isystem", libcDir + "/libc-top-half/musl/include", | ||
| "-isystem", libcDir + "/libc-bottom-half/headers/public", | ||
| "-I" + headerPath, | ||
| } | ||
| }, | ||
| sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/wasi-libc") }, | ||
| librarySources: func(target string) ([]string, error) { | ||
| return []string{ | ||
| // memory builtins needed for llvm.memcpy.*, llvm.memmove.*, and | ||
| // llvm.memset.* LLVM intrinsics. | ||
| "libc-top-half/musl/src/string/memcpy.c", | ||
| "libc-top-half/musl/src/string/memmove.c", | ||
| "libc-top-half/musl/src/string/memset.c", | ||
|
|
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| // exp, exp2, and log are needed for LLVM math builtin functions | ||
| // like llvm.exp.*. | ||
| "libc-top-half/musl/src/math/__math_divzero.c", | ||
| "libc-top-half/musl/src/math/__math_invalid.c", | ||
| "libc-top-half/musl/src/math/__math_oflow.c", | ||
| "libc-top-half/musl/src/math/__math_uflow.c", | ||
| "libc-top-half/musl/src/math/__math_xflow.c", | ||
| "libc-top-half/musl/src/math/exp.c", | ||
| "libc-top-half/musl/src/math/exp_data.c", | ||
| "libc-top-half/musl/src/math/exp2.c", | ||
| "libc-top-half/musl/src/math/log.c", | ||
| "libc-top-half/musl/src/math/log_data.c", | ||
| }, nil | ||
| }, | ||
| } | ||
|
|
||
| // alltypes.h for wasm-libc, using the types as defined inside Clang. | ||
| const wasmAllTypes = ` | ||
| typedef __SIZE_TYPE__ size_t; | ||
| typedef __INT8_TYPE__ int8_t; | ||
| typedef __INT16_TYPE__ int16_t; | ||
| typedef __INT32_TYPE__ int32_t; | ||
| typedef __INT64_TYPE__ int64_t; | ||
| typedef __UINT8_TYPE__ uint8_t; | ||
| typedef __UINT16_TYPE__ uint16_t; | ||
| typedef __UINT32_TYPE__ uint32_t; | ||
| typedef __UINT64_TYPE__ uint64_t; | ||
| typedef __UINTPTR_TYPE__ uintptr_t; | ||
| // This type is used internally in wasi-libc. | ||
| typedef double double_t; | ||
| ` |
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