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std/wasm: add buildOpcode to help construction of Opcodes
This commit is contained in:
gracefu
parent
869fc06c57
commit
3648e43dda
@ -5,6 +5,8 @@
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// and substantial portions of the software.
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const testing = @import("std.zig").testing;
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// TODO: Add support for multi-byte ops (e.g. table operations)
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/// Wasm instruction opcodes
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///
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/// All instructions are defined as per spec:
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@ -175,7 +177,7 @@ pub const Opcode = enum(u8) {
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i32_reinterpret_f32 = 0xBC,
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i64_reinterpret_f64 = 0xBD,
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f32_reinterpret_i32 = 0xBE,
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i64_reinterpret_i64 = 0xBF,
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f64_reinterpret_i64 = 0xBF,
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i32_extend8_s = 0xC0,
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i32_extend16_s = 0xC1,
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i64_extend8_s = 0xC2,
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@ -2,6 +2,7 @@ const std = @import("std");
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const Allocator = std.mem.Allocator;
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const ArrayList = std.ArrayList;
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const assert = std.debug.assert;
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const testing = std.testing;
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const leb = std.leb;
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const mem = std.mem;
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const wasm = std.wasm;
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@ -29,6 +30,445 @@ const WValue = union(enum) {
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block_idx: u32,
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};
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/// Wasm ops, but without input/output/signedness information
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/// Used for `buildOpcode`
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const Op = enum {
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@"unreachable",
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nop,
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block,
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loop,
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@"if",
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@"else",
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end,
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br,
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br_if,
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br_table,
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@"return",
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call,
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call_indirect,
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drop,
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select,
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local_get,
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local_set,
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local_tee,
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global_get,
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global_set,
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load,
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store,
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memory_size,
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memory_grow,
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@"const",
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eqz,
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eq,
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ne,
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lt,
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gt,
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le,
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ge,
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clz,
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ctz,
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popcnt,
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add,
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sub,
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mul,
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div,
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rem,
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@"and",
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@"or",
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xor,
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shl,
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shr,
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rotl,
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rotr,
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abs,
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neg,
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ceil,
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floor,
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trunc,
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nearest,
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sqrt,
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min,
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max,
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copysign,
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wrap,
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convert,
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demote,
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promote,
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reinterpret,
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extend,
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};
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/// Contains the settings needed to create an `Opcode` using `buildOpcode`.
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///
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/// The fields correspond to the opcode name. Here is an example
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/// i32_trunc_f32_s
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/// ^ ^ ^ ^
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/// | | | |
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/// valtype1 | | |
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/// = .i32 | | |
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/// | | |
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/// op | |
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/// = .trunc | |
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/// | |
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/// valtype2 |
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/// = .f32 |
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/// |
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/// width |
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/// = null |
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/// |
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/// signed
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/// = true
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///
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/// There can be missing fields, here are some more examples:
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/// i64_load8_u
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/// --> .{ .valtype1 = .i64, .op = .load, .width = 8, signed = false }
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/// i32_mul
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/// --> .{ .valtype1 = .i32, .op = .trunc }
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/// nop
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/// --> .{ .op = .nop }
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const OpcodeBuildArguments = struct {
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/// First valtype in the opcode (usually represents the type of the output)
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valtype1: ?wasm.Valtype = null,
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/// The operation (e.g. call, unreachable, div, min, sqrt, etc.)
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op: Op,
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/// Width of the operation (e.g. 8 for i32_load8_s, 16 for i64_extend16_i32_s)
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width: ?u8 = null,
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/// Second valtype in the opcode name (usually represents the type of the input)
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valtype2: ?wasm.Valtype = null,
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/// Signedness of the op
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signedness: ?std.builtin.Signedness = null,
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};
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/// Helper function that builds an Opcode given the arguments needed
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fn buildOpcode(args: OpcodeBuildArguments) wasm.Opcode {
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switch (args.op) {
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.@"unreachable" => return .@"unreachable",
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.nop => return .nop,
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.block => return .block,
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.loop => return .loop,
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.@"if" => return .@"if",
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.@"else" => return .@"else",
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.end => return .end,
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.br => return .br,
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.br_if => return .br_if,
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.br_table => return .br_table,
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.@"return" => return .@"return",
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.call => return .call,
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.call_indirect => return .call_indirect,
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.drop => return .drop,
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.select => return .select,
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.local_get => return .local_get,
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.local_set => return .local_set,
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.local_tee => return .local_tee,
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.global_get => return .global_get,
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.global_set => return .global_set,
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.load => if (args.width) |width|
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switch (width) {
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8 => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_load8_s else return .i32_load8_u,
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.i64 => if (args.signedness.? == .signed) return .i64_load8_s else return .i64_load8_u,
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.f32, .f64 => unreachable,
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},
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16 => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_load16_s else return .i32_load16_u,
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.i64 => if (args.signedness.? == .signed) return .i64_load16_s else return .i64_load16_u,
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.f32, .f64 => unreachable,
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},
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32 => switch (args.valtype1.?) {
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.i64 => if (args.signedness.? == .signed) return .i64_load32_s else return .i64_load32_u,
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.i32, .f32, .f64 => unreachable,
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},
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else => unreachable,
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}
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else switch (args.valtype1.?) {
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.i32 => return .i32_load,
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.i64 => return .i64_load,
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.f32 => return .f32_load,
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.f64 => return .f64_load,
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},
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.store => if (args.width) |width| {
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switch (width) {
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8 => switch (args.valtype1.?) {
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.i32 => return .i32_store8,
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.i64 => return .i64_store8,
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.f32, .f64 => unreachable,
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},
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16 => switch (args.valtype1.?) {
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.i32 => return .i32_store16,
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.i64 => return .i64_store16,
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.f32, .f64 => unreachable,
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},
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32 => switch (args.valtype1.?) {
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.i64 => return .i64_store32,
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.i32, .f32, .f64 => unreachable,
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},
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else => unreachable,
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}
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} else {
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switch (args.valtype1.?) {
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.i32 => return .i32_store,
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.i64 => return .i64_store,
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.f32 => return .f32_store,
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.f64 => return .f64_store,
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}
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},
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.memory_size => return .memory_size,
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.memory_grow => return .memory_grow,
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.@"const" => switch (args.valtype1.?) {
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.i32 => return .i32_const,
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.i64 => return .i64_const,
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.f32 => return .f32_const,
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.f64 => return .f64_const,
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},
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.eqz => switch (args.valtype1.?) {
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.i32 => return .i32_eqz,
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.i64 => return .i64_eqz,
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.f32, .f64 => unreachable,
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},
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.eq => switch (args.valtype1.?) {
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.i32 => return .i32_eq,
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.i64 => return .i64_eq,
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.f32 => return .f32_eq,
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.f64 => return .f64_eq,
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},
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.ne => switch (args.valtype1.?) {
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.i32 => return .i32_ne,
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.i64 => return .i64_ne,
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.f32 => return .f32_ne,
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.f64 => return .f64_ne,
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},
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.lt => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_lt_s else return .i32_lt_u,
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.i64 => if (args.signedness.? == .signed) return .i64_lt_s else return .i64_lt_u,
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.f32 => return .f32_lt,
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.f64 => return .f64_lt,
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},
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.gt => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_gt_s else return .i32_gt_u,
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.i64 => if (args.signedness.? == .signed) return .i64_gt_s else return .i64_gt_u,
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.f32 => return .f32_gt,
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.f64 => return .f64_gt,
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},
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.le => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_le_s else return .i32_le_u,
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.i64 => if (args.signedness.? == .signed) return .i64_le_s else return .i64_le_u,
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.f32 => return .f32_le,
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.f64 => return .f64_le,
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},
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.ge => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_ge_s else return .i32_ge_u,
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.i64 => if (args.signedness.? == .signed) return .i64_ge_s else return .i64_ge_u,
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.f32 => return .f32_ge,
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.f64 => return .f64_ge,
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},
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.clz => switch (args.valtype1.?) {
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.i32 => return .i32_clz,
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.i64 => return .i64_clz,
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.f32, .f64 => unreachable,
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},
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.ctz => switch (args.valtype1.?) {
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.i32 => return .i32_ctz,
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.i64 => return .i64_ctz,
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.f32, .f64 => unreachable,
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},
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.popcnt => switch (args.valtype1.?) {
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.i32 => return .i32_popcnt,
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.i64 => return .i64_popcnt,
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.f32, .f64 => unreachable,
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},
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.add => switch (args.valtype1.?) {
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.i32 => return .i32_add,
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.i64 => return .i64_add,
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.f32 => return .f32_add,
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.f64 => return .f64_add,
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},
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.sub => switch (args.valtype1.?) {
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.i32 => return .i32_sub,
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.i64 => return .i64_sub,
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.f32 => return .f32_sub,
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.f64 => return .f64_sub,
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},
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.mul => switch (args.valtype1.?) {
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.i32 => return .i32_mul,
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.i64 => return .i64_mul,
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.f32 => return .f32_mul,
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.f64 => return .f64_mul,
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},
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.div => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_div_s else return .i32_div_u,
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.i64 => if (args.signedness.? == .signed) return .i64_div_s else return .i64_div_u,
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.f32 => return .f32_div,
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.f64 => return .f64_div,
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},
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.rem => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_rem_s else return .i32_rem_u,
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.i64 => if (args.signedness.? == .signed) return .i64_rem_s else return .i64_rem_u,
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.f32, .f64 => unreachable,
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},
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.@"and" => switch (args.valtype1.?) {
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.i32 => return .i32_and,
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.i64 => return .i64_and,
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.f32, .f64 => unreachable,
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},
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.@"or" => switch (args.valtype1.?) {
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.i32 => return .i32_or,
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.i64 => return .i64_or,
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.f32, .f64 => unreachable,
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},
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.xor => switch (args.valtype1.?) {
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.i32 => return .i32_xor,
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.i64 => return .i64_xor,
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.f32, .f64 => unreachable,
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},
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.shl => switch (args.valtype1.?) {
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.i32 => return .i32_shl,
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.i64 => return .i64_shl,
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.f32, .f64 => unreachable,
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},
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.shr => switch (args.valtype1.?) {
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.i32 => if (args.signedness.? == .signed) return .i32_shr_s else return .i32_shr_u,
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.i64 => if (args.signedness.? == .signed) return .i64_shr_s else return .i64_shr_u,
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.f32, .f64 => unreachable,
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},
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.rotl => switch (args.valtype1.?) {
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.i32 => return .i32_rotl,
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.i64 => return .i64_rotl,
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.f32, .f64 => unreachable,
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},
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.rotr => switch (args.valtype1.?) {
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.i32 => return .i32_rotr,
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.i64 => return .i64_rotr,
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.f32, .f64 => unreachable,
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},
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.abs => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_abs,
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.f64 => return .f64_abs,
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},
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.neg => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_neg,
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.f64 => return .f64_neg,
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},
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.ceil => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_ceil,
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.f64 => return .f64_ceil,
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},
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.floor => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_floor,
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.f64 => return .f64_floor,
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},
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.trunc => switch (args.valtype1.?) {
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.i32 => switch (args.valtype2.?) {
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.i32 => unreachable,
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.i64 => unreachable,
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.f32 => if (args.signedness.? == .signed) return .i32_trunc_f32_s else return .i32_trunc_f32_u,
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.f64 => if (args.signedness.? == .signed) return .i32_trunc_f64_s else return .i32_trunc_f64_u,
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},
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.i64 => unreachable,
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.f32 => return .f32_trunc,
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.f64 => return .f64_trunc,
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},
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.nearest => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_nearest,
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.f64 => return .f64_nearest,
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},
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.sqrt => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_sqrt,
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.f64 => return .f64_sqrt,
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},
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.min => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_min,
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.f64 => return .f64_min,
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},
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.max => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_max,
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.f64 => return .f64_max,
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},
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.copysign => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => return .f32_copysign,
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.f64 => return .f64_copysign,
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},
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.wrap => switch (args.valtype1.?) {
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.i32 => switch (args.valtype2.?) {
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.i32 => unreachable,
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.i64 => return .i32_wrap_i64,
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.f32, .f64 => unreachable,
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},
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.i64, .f32, .f64 => unreachable,
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},
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.convert => switch (args.valtype1.?) {
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.i32, .i64 => unreachable,
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.f32 => switch (args.valtype2.?) {
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.i32 => if (args.signedness.? == .signed) return .f32_convert_i32_s else return .f32_convert_i32_u,
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.i64 => if (args.signedness.? == .signed) return .f32_convert_i64_s else return .f32_convert_i64_u,
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.f32, .f64 => unreachable,
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},
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.f64 => switch (args.valtype2.?) {
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.i32 => if (args.signedness.? == .signed) return .f64_convert_i32_s else return .f64_convert_i32_u,
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.i64 => if (args.signedness.? == .signed) return .f64_convert_i64_s else return .f64_convert_i64_u,
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.f32, .f64 => unreachable,
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},
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},
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.demote => if (args.valtype1.? == .f32 and args.valtype2.? == .f64) return .f32_demote_f64 else unreachable,
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.promote => if (args.valtype1.? == .f64 and args.valtype2.? == .f32) return .f64_promote_f32 else unreachable,
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.reinterpret => switch (args.valtype1.?) {
|
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.i32 => if (args.valtype2.? == .f32) return .i32_reinterpret_f32 else unreachable,
|
||||
.i64 => if (args.valtype2.? == .f64) return .i64_reinterpret_f64 else unreachable,
|
||||
.f32 => if (args.valtype2.? == .i32) return .f32_reinterpret_i32 else unreachable,
|
||||
.f64 => if (args.valtype2.? == .i64) return .f64_reinterpret_i64 else unreachable,
|
||||
},
|
||||
.extend => switch (args.valtype1.?) {
|
||||
.i32 => switch (args.width.?) {
|
||||
8 => if (args.signedness.? == .signed) return .i32_extend8_s else unreachable,
|
||||
16 => if (args.signedness.? == .signed) return .i32_extend16_s else unreachable,
|
||||
else => unreachable,
|
||||
},
|
||||
.i64 => switch (args.width.?) {
|
||||
8 => if (args.signedness.? == .signed) return .i64_extend8_s else unreachable,
|
||||
16 => if (args.signedness.? == .signed) return .i64_extend16_s else unreachable,
|
||||
32 => if (args.signedness.? == .signed) return .i64_extend32_s else unreachable,
|
||||
else => unreachable,
|
||||
},
|
||||
.f32, .f64 => unreachable,
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
test "Wasm - buildOpcode" {
|
||||
// Make sure buildOpcode is referenced, and test some examples
|
||||
const i32_const = buildOpcode(.{ .op = .@"const", .valtype1 = .i32 });
|
||||
const end = buildOpcode(.{ .op = .end });
|
||||
const local_get = buildOpcode(.{ .op = .local_get });
|
||||
const i64_extend32_s = buildOpcode(.{ .op = .extend, .valtype1 = .i64, .width = 32, .signedness = .signed });
|
||||
const f64_reinterpret_i64 = buildOpcode(.{ .op = .reinterpret, .valtype1 = .f64, .valtype2 = .i64 });
|
||||
|
||||
testing.expectEqual(@as(wasm.Opcode, .i32_const), i32_const);
|
||||
testing.expectEqual(@as(wasm.Opcode, .end), end);
|
||||
testing.expectEqual(@as(wasm.Opcode, .local_get), local_get);
|
||||
testing.expectEqual(@as(wasm.Opcode, .i64_extend32_s), i64_extend32_s);
|
||||
testing.expectEqual(@as(wasm.Opcode, .f64_reinterpret_i64), f64_reinterpret_i64);
|
||||
}
|
||||
|
||||
/// Hashmap to store generated `WValue` for each `Inst`
|
||||
pub const ValueTable = std.AutoHashMapUnmanaged(*Inst, WValue);
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user