Some progress on IR parsing.

Alhtough IR parsing is technically called while
parsing, since we lack the hability to parse
blocks or labels or if or any hard stuff really,
it does not affect code parsing. However it is
nice to have it there as zig compiles it :)

1 files changed, 23 insertions, 1 deletions

diff --git a/src/mods/Parser.zig b/src/mods/Parser.zig
index d9f7ccf..2e3c434 100644
--- a/src/mods/Parser.zig
+++ b/src/mods/Parser.zig
@@ -1,5 +1,6 @@
 const std = @import("std");
 const vm = @import("vm.zig");
+const IR = @import("ir.zig");
 const Allocator = std.mem.Allocator;
 
 bytes: []const u8,
@@ -38,6 +39,7 @@ pub const FunctionScope = enum {
 const Parser = @This();
 
 pub const Error = error{
+    invalid_instruction,
     invalid_magic,
     invalid_version,
     invalid_section,
@@ -78,10 +80,28 @@ pub fn readByte(self: *Parser) !u8 {
     return (try self.read(1))[0];
 }
 
-fn readU32(self: *Parser) !u32 {
+pub fn readU32(self: *Parser) !u32 {
     return std.leb.readUleb128(u32, self);
 }
 
+pub fn readI32(self: *Parser) !i32 {
+    return std.leb.readIleb128(i32, self);
+}
+
+pub fn readI64(self: *Parser) !i64 {
+    return std.leb.readIleb128(i64, self);
+}
+
+pub fn readF32(self: *Parser) !f32 {
+    const bytes = try self.read(@sizeOf(f32));
+    return std.mem.bytesAsValue(f32, bytes).*;
+}
+
+pub fn readF64(self: *Parser) !f64 {
+    const bytes = try self.read(@sizeOf(f64));
+    return std.mem.bytesAsValue(f64, bytes).*;
+}
+
 fn readName(self: *Parser) ![]const u8 {
     // NOTE: This should be the only vector not parsed through parseVector
     const size = try self.readU32();
@@ -442,6 +462,8 @@ fn parseCode(self: *Parser) !Func {
         local_count += l.n;
     }
 
+    _ = try IR.parse(self);
+
     const func = Func{
         .locals = try self.allocator.alloc(Valtype, local_count),
         .code = try self.read(end_idx - self.byte_idx),