updated readme

.gitignore

@@ -1,2 +1,3 @@
 /target
 tags
+TAGS

README.md

@@ -1 +1 @@
-# SkyLang
+# ![SkyLang](.images/slang-logo.png)  

src/codegen/#fasm.rs#

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+use crate::parse::ast::*;
+
+pub fn fasm_codegen(expr: Expr) -> String {
+    let mut asm_text = String::new();
+    let mut asm_data = String::new();
+    
+    asm_text.push_str("format ELF64 executable 3\n");
+    asm_text.push_str("segment readable executable\n");
+    asm_text.push_str("entry _start\n");
+    asm_text.push_str("_start:\n");
+    asm_data.push_str("segment readable writeable\n");
+    match expr {
+	Expr::MathExpr(e) => {
+	    asm_text.push_str(format!("\tmov r10, {:?}\n", e.left).as_str());
+	    asm_text.push_str(format!("\tmov r11, {:?}\n", e.right).as_str());
+	    match e.operator {
+		// If the operator is addition.
+		MathOperator::OP_ADD => {
+		    asm_text.push_str("\tadd r10, r11\n");
+		    asm_text.push_str("\tmov rax, r10\n");
+		},
+		// If the operator is multiplication.
+		MathOperator::OP_MULT => {
+		    asm_text.push_str("\timul r10, r11\n");
+		    asm_text.push_str("\tmov rax, r10\n");
+		},
+		// If the operator is division.
+		MathOperator::OP_DIV => {
+		    asm_text.push_str("\tmov rax, r10\n");
+		    asm_text.push_str("\tmov rdx, r11\n");
+		    asm_text.push_str("\tidiv r10, r11\n");
+		    asm_text.push_str("\tmov rax, r10\n");
+		},
+		// If the operators is subtraction.
+		MathOperator::OP_SUB => {
+		    asm_text.push_str("\tsub r10, r11\n");
+		    asm_text.push_str("\tmov rax, r10\n");
+		},
+		// If the operator is modulo.
+		MathOperator::OP_MOD => {
+		    asm_text.push_str("\tmov rax, r10\n");
+		    asm_text.push_str("\tmov rdx, r11\n");
+		    asm_text.push_str("\tidiv r10, r11\n");
+		    asm_text.push_str("\tmov rax, rdx\n");
+
+		}
+	    }
+	},
+
+	Expr::FunCall(e) => {
+	    for (i, p) in e.params.iter().enumerate() {
+		match i {
+		    0 => {
+			// First parameter. Put in %rdi.
+			asm_text.push_str(format!("\tmov rdi, {:?}\n", p.value).as_str());
+		    },
+
+		    1 => {
+			// Second parameter. Put in %rsi.
+			asm_text.push_str(format!("\tmov rsi, {:?}\n", p.value).as_str());
+		    },
+
+		    2 => {
+			// Third parameter. Put in %rdx.
+			asm_text.push_str(format!("\tmov rdx, {:?}\n", p.value).as_str());
+		    },
+
+		    3 => {
+			// Fourth parameter. Put in %rcx.
+			asm_text.push_str(format!("\tmov rcx, {:?}\n", p.value).as_str());
+		    },
+
+		    4 => {
+			// Fifth parameter. Put in %r8.
+			asm_text.push_str(format!("\tmov r8, {:?}\n", p.value).as_str());
+		    },
+		    
+		    5 => {
+			// Sixth parameter. Put in %r9.
+			asm_text.push_str(format!("\tmov r9, {:?}\n", p.value).as_str());
+		    },
+
+		    _ => {
+			// Parameters after the sixth parameter are pushed to the stack.
+			asm_text.push_str(format!("\tpush {:?}\n", p.value).as_str());
+		    }
+		}
+	    }
+
+	    asm_text.push_str(format!("call {:?}", e.name).as_str());
+	},
+
+	Expr::VarDefenition(e) => {
+	    asm_data.push_str(format!("{} dq {:?}", e.name, e.value).as_str());
+	},
+	
+	_ => unimplemented!("sorry unimplemented"),
+    }
+    let asm = format!("{}{}", asm_text, asm_data);
+    println!("{}", asm);
+    asm
+}

src/codegen/.#fasm.rs

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+goren@goren.13806:1700158488