diff options
Diffstat (limited to 'lib/std')
| -rw-r--r-- | lib/std/std.zig | 1 | ||||
| -rw-r--r-- | lib/std/wasm.zig | 266 |
2 files changed, 267 insertions, 0 deletions
diff --git a/lib/std/std.zig b/lib/std/std.zig index 780579debf..ca73adc36e 100644 --- a/lib/std/std.zig +++ b/lib/std/std.zig @@ -77,6 +77,7 @@ pub const testing = @import("testing.zig"); pub const time = @import("time.zig"); pub const unicode = @import("unicode.zig"); pub const valgrind = @import("valgrind.zig"); +pub const wasm = @import("wasm.zig"); pub const zig = @import("zig.zig"); pub const start = @import("start.zig"); diff --git a/lib/std/wasm.zig b/lib/std/wasm.zig new file mode 100644 index 0000000000..aa087c89c9 --- /dev/null +++ b/lib/std/wasm.zig @@ -0,0 +1,266 @@ +// SPDX-License-Identifier: MIT +// Copyright (c) 2015-2021 Zig Contributors +// This file is part of [zig](https://ziglang.org/), which is MIT licensed. +// The MIT license requires this copyright notice to be included in all copies +// and substantial portions of the software. +const testing = @import("std.zig").testing; + +/// Wasm instruction opcodes +/// +/// All instructions are defined as per spec: +/// https://webassembly.github.io/spec/core/appendix/index-instructions.html +pub const Opcode = enum(u8) { + @"unreachable" = 0x00, + nop = 0x01, + block = 0x02, + loop = 0x03, + @"if" = 0x04, + @"else" = 0x05, + end = 0x0B, + br = 0x0C, + br_if = 0x0D, + br_table = 0x0E, + @"return" = 0x0F, + call = 0x10, + call_indirect = 0x11, + drop = 0x1A, + select = 0x1B, + local_get = 0x20, + local_set = 0x21, + local_tee = 0x22, + global_get = 0x23, + global_set = 0x24, + i32_load = 0x28, + i64_load = 0x29, + f32_load = 0x2A, + f64_load = 0x2B, + i32_load8_s = 0x2C, + i32_load8_u = 0x2D, + i32_load16_s = 0x2E, + i32_load16_u = 0x2F, + i64_load8_s = 0x30, + i64_load8_u = 0x31, + i64_load16_s = 0x32, + i64_load16_u = 0x33, + i64_load32_s = 0x34, + i64_load32_u = 0x35, + i32_store = 0x36, + i64_store = 0x37, + f32_store = 0x38, + f64_store = 0x39, + i32_store8 = 0x3A, + i32_store16 = 0x3B, + i64_store8 = 0x3C, + i64_store16 = 0x3D, + i64_store32 = 0x3E, + memory_size = 0x3F, + memory_grow = 0x40, + i32_const = 0x41, + i64_const = 0x42, + f32_const = 0x43, + f64_const = 0x44, + i32_eqz = 0x45, + i32_eq = 0x46, + i32_ne = 0x47, + i32_lt_s = 0x48, + i32_lt_u = 0x49, + i32_gt_s = 0x4A, + i32_gt_u = 0x4B, + i32_le_s = 0x4C, + i32_le_u = 0x4D, + i32_ge_s = 0x4E, + i32_ge_u = 0x4F, + i64_eqz = 0x50, + i64_eq = 0x51, + i64_ne = 0x52, + i64_lt_s = 0x53, + i64_lt_u = 0x54, + i64_gt_s = 0x55, + i64_gt_u = 0x56, + i64_le_s = 0x57, + i64_le_u = 0x58, + i64_ge_s = 0x59, + i64_ge_u = 0x5A, + f32_eq = 0x5B, + f32_ne = 0x5C, + f32_lt = 0x5D, + f32_gt = 0x5E, + f32_le = 0x5F, + f32_ge = 0x60, + f64_eq = 0x61, + f64_ne = 0x62, + f64_lt = 0x63, + f64_gt = 0x64, + f64_le = 0x65, + f64_ge = 0x66, + i32_clz = 0x67, + i32_ctz = 0x68, + i32_popcnt = 0x69, + i32_add = 0x6A, + i32_sub = 0x6B, + i32_mul = 0x6C, + i32_div_s = 0x6D, + i32_div_u = 0x6E, + i32_rem_s = 0x6F, + i32_rem_u = 0x70, + i32_and = 0x71, + i32_or = 0x72, + i32_xor = 0x73, + i32_shl = 0x74, + i32_shr_s = 0x75, + i32_shr_u = 0x76, + i32_rotl = 0x77, + i32_rotr = 0x78, + i64_clz = 0x79, + i64_ctz = 0x7A, + i64_popcnt = 0x7B, + i64_add = 0x7C, + i64_sub = 0x7D, + i64_mul = 0x7E, + i64_div_s = 0x7F, + i64_div_u = 0x80, + i64_rem_s = 0x81, + i64_rem_u = 0x82, + i64_and = 0x83, + i64_or = 0x84, + i64_xor = 0x85, + i64_shl = 0x86, + i64_shr_s = 0x87, + i64_shr_u = 0x88, + i64_rotl = 0x89, + i64_rotr = 0x8A, + f32_abs = 0x8B, + f32_neg = 0x8C, + f32_ceil = 0x8D, + f32_floor = 0x8E, + f32_trunc = 0x8F, + f32_nearest = 0x90, + f32_sqrt = 0x91, + f32_add = 0x92, + f32_sub = 0x93, + f32_mul = 0x94, + f32_div = 0x95, + f32_min = 0x96, + f32_max = 0x97, + f32_copysign = 0x98, + f64_abs = 0x99, + f64_neg = 0x9A, + f64_ceil = 0x9B, + f64_floor = 0x9C, + f64_trunc = 0x9D, + f64_nearest = 0x9E, + f64_sqrt = 0x9F, + f64_add = 0xA0, + f64_sub = 0xA1, + f64_mul = 0xA2, + f64_div = 0xA3, + f64_min = 0xA4, + f64_max = 0xA5, + f64_copysign = 0xA6, + i32_wrap_i64 = 0xA7, + i32_trunc_f32_s = 0xA8, + i32_trunc_f32_u = 0xA9, + i32_trunc_f64_s = 0xB0, + i32_trunc_f64_u = 0xB1, + f32_convert_i32_s = 0xB2, + f32_convert_i32_u = 0xB3, + f32_convert_i64_s = 0xB4, + f32_convert_i64_u = 0xB5, + f32_demote_f64 = 0xB6, + f64_convert_i32_s = 0xB7, + f64_convert_i32_u = 0xB8, + f64_convert_i64_s = 0xB9, + f64_convert_i64_u = 0xBA, + f64_promote_f32 = 0xBB, + i32_reinterpret_f32 = 0xBC, + i64_reinterpret_f64 = 0xBD, + f32_reinterpret_i32 = 0xBE, + i64_reinterpret_i64 = 0xBF, + i32_extend8_s = 0xC0, + i32_extend16_s = 0xC1, + i64_extend8_s = 0xC2, + i64_extend16_s = 0xC3, + i64_extend32_s = 0xC4, + _, +}; + +/// Returns the integer value of an `Opcode`. Used by the Zig compiler +/// to write instructions to the wasm binary file +pub fn opcode(op: Opcode) u8 { + return @enumToInt(op); +} + +test "Wasm - opcodes" { + // Ensure our opcodes values remain intact as certain values are skipped due to them being reserved + const i32_const = opcode(.i32_const); + const end = opcode(.end); + const drop = opcode(.drop); + const local_get = opcode(.local_get); + const i64_extend32_s = opcode(.i64_extend32_s); + + testing.expectEqual(@as(u16, 0x41), i32_const); + testing.expectEqual(@as(u16, 0x0B), end); + testing.expectEqual(@as(u16, 0x1A), drop); + testing.expectEqual(@as(u16, 0x20), local_get); + testing.expectEqual(@as(u16, 0xC4), i64_extend32_s); +} + +/// Enum representing all Wasm value types as per spec: +/// https://webassembly.github.io/spec/core/binary/types.html +pub const Valtype = enum(u8) { + i32 = 0x7F, + i64 = 0x7E, + f32 = 0x7D, + f64 = 0x7C, +}; + +/// Returns the integer value of a `Valtype` +pub fn valtype(value: Valtype) u8 { + return @enumToInt(value); +} + +test "Wasm - valtypes" { + const _i32 = valtype(.i32); + const _i64 = valtype(.i64); + const _f32 = valtype(.f32); + const _f64 = valtype(.f64); + + testing.expectEqual(@as(u8, 0x7F), _i32); + testing.expectEqual(@as(u8, 0x7E), _i64); + testing.expectEqual(@as(u8, 0x7D), _f32); + testing.expectEqual(@as(u8, 0x7C), _f64); +} + +/// Wasm module sections as per spec: +/// https://webassembly.github.io/spec/core/binary/modules.html +pub const Section = enum(u8) { + custom, + type, + import, + function, + table, + memory, + global, + @"export", + start, + element, + code, + data, +}; + +/// Returns the integer value of a given `Section` +pub fn section(val: Section) u8 { + return @enumToInt(val); +} + +// types +pub const element_type: u8 = 0x70; +pub const function_type: u8 = 0x60; +pub const result_type: u8 = 0x40; + +/// Represents a block which will not return a value +pub const block_empty: u8 = 0x40; + +// binary constants +pub const magic = [_]u8{ 0x00, 0x61, 0x73, 0x6D }; // \0asm +pub const version = [_]u8{ 0x01, 0x00, 0x00, 0x00 }; // version 1 |