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This commit is contained in:
Antoni Piasecki
2025-06-01 21:48:47 +02:00
parent 437697b287
commit e647e7f508
20 changed files with 167 additions and 147 deletions
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72
src/codegen_x86_64.rs
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@@ -101,11 +101,14 @@ extern printf
extern sprintf
extern strlen
extern strcmp
extern strcat
extern strcpy
extern strdup
extern puts
extern system
print equ puts
extern exit
copystr equ strdup
; generated with clang
strrev:
push r14
push rbx
@@ -118,15 +121,15 @@ strrev:
mov rcx, rax
mov rsi, r14
mov rdx, r14
.LBB0_1:
.strrev.1:
sub rdx, 1
jb .LBB0_2
jb .strrev.2
mov sil, byte [rbx + rsi - 1]
mov byte [rcx], sil
inc rcx
mov rsi, rdx
jmp .LBB0_1
.LBB0_2:
jmp .strrev.1
.strrev.2:
mov byte [rax + r14], 0
add rsp, 8
pop rbx
@@ -138,30 +141,30 @@ isqrt:
mov rcx, 1
mov rbx, rdi
shl rcx, 62
.LBB0_3:
.isqrt.1:
cmp rcx, 0
je .LBB0_5
je .isqrt.5
cmp rcx, rbx
jbe .LBB0_4
jbe .isqrt.2
shr rcx, 2
jmp .LBB0_3
.LBB0_4:
jmp .isqrt.1
.isqrt.2:
cmp rcx, 0
je .LBB0_5
je .isqrt.5
mov rdx, rax
add rdx, rcx
cmp rbx, rdx
jb .LBB0_7
jb .isqrt.3
sub rbx, rdx
shr rax, 1
add rax, rcx
jmp .LBB0_6
.LBB0_7:
jmp .isqrt.4
.isqrt.3:
shr rax, 1
.LBB0_6:
.isqrt.4:
shr rcx, 2
jmp .LBB0_4
.LBB0_5:
jmp .isqrt.2
.isqrt.5:
ret
nth:
@@ -259,10 +262,8 @@ nth:
self.compile_stmt(env, *body)?;
if name.lexeme == "main" {
// default exit code
emit!(&mut self.output, " mov rax, 0");
}
// TODO: default exit code only for main
emit!(&mut self.output, " mov rax, 0");
emit!(&mut self.output, " mov rsp, rbp");
emit!(&mut self.output, " pop rbp");
@@ -356,17 +357,22 @@ nth:
TokenType::String => {
// TODO: actual string parsing in the tokenizer
let value = &token.lexeme[1..token.lexeme.len() - 1].replace("\\n", "\n");
let charcodes = value
.chars()
.map(|x| (x as u8).to_string())
.collect::<Vec<String>>()
.join(",");
emit!(
&mut self.data_section,
" S{} db {},0",
self.data_counter,
charcodes,
);
if value.is_empty() {
emit!(&mut self.data_section, " S{} db 0", self.data_counter);
} else {
let charcodes = value
.chars()
.map(|x| (x as u8).to_string())
.collect::<Vec<String>>()
.join(",");
emit!(
&mut self.data_section,
" S{} db {},0",
self.data_counter,
charcodes,
);
}
emit!(&mut self.output, " mov rax, S{}", self.data_counter);
self.data_counter += 1;
}