From 0f232d8eaee1f94896596a9969982297cee7dc67 Mon Sep 17 00:00:00 2001 From: Michael Smith Date: Wed, 29 Dec 2021 18:33:40 +0000 Subject: Remove some unused files --- src/3p/chibicc/codegen.c | 1595 ---------------------------------------------- 1 file changed, 1595 deletions(-) delete mode 100644 src/3p/chibicc/codegen.c (limited to 'src/3p/chibicc/codegen.c') diff --git a/src/3p/chibicc/codegen.c b/src/3p/chibicc/codegen.c deleted file mode 100644 index da11fd7..0000000 --- a/src/3p/chibicc/codegen.c +++ /dev/null @@ -1,1595 +0,0 @@ -#include "chibicc.h" - -#define GP_MAX 6 -#define FP_MAX 8 - -static FILE *output_file; -static int depth; -static char *argreg8[] = {"%dil", "%sil", "%dl", "%cl", "%r8b", "%r9b"}; -static char *argreg16[] = {"%di", "%si", "%dx", "%cx", "%r8w", "%r9w"}; -static char *argreg32[] = {"%edi", "%esi", "%edx", "%ecx", "%r8d", "%r9d"}; -static char *argreg64[] = {"%rdi", "%rsi", "%rdx", "%rcx", "%r8", "%r9"}; -static Obj *current_fn; - -static void gen_expr(Node *node); -static void gen_stmt(Node *node); - -__attribute__((format(printf, 1, 2))) -static void println(char *fmt, ...) { - va_list ap; - va_start(ap, fmt); - vfprintf(output_file, fmt, ap); - va_end(ap); - fprintf(output_file, "\n"); -} - -static int count(void) { - static int i = 1; - return i++; -} - -static void push(void) { - println(" push %%rax"); - depth++; -} - -static void pop(char *arg) { - println(" pop %s", arg); - depth--; -} - -static void pushf(void) { - println(" sub $8, %%rsp"); - println(" movsd %%xmm0, (%%rsp)"); - depth++; -} - -static void popf(int reg) { - println(" movsd (%%rsp), %%xmm%d", reg); - println(" add $8, %%rsp"); - depth--; -} - -// Round up `n` to the nearest multiple of `align`. For instance, -// align_to(5, 8) returns 8 and align_to(11, 8) returns 16. -int align_to(int n, int align) { - return (n + align - 1) / align * align; -} - -static char *reg_dx(int sz) { - switch (sz) { - case 1: return "%dl"; - case 2: return "%dx"; - case 4: return "%edx"; - case 8: return "%rdx"; - } - unreachable(); -} - -static char *reg_ax(int sz) { - switch (sz) { - case 1: return "%al"; - case 2: return "%ax"; - case 4: return "%eax"; - case 8: return "%rax"; - } - unreachable(); -} - -// Compute the absolute address of a given node. -// It's an error if a given node does not reside in memory. -static void gen_addr(Node *node) { - switch (node->kind) { - case ND_VAR: - // Variable-length array, which is always local. - if (node->var->ty->kind == TY_VLA) { - println(" mov %d(%%rbp), %%rax", node->var->offset); - return; - } - - // Local variable - if (node->var->is_local) { - println(" lea %d(%%rbp), %%rax", node->var->offset); - return; - } - - if (opt_fpic) { - // Thread-local variable - if (node->var->is_tls) { - println(" data16 lea %s@tlsgd(%%rip), %%rdi", node->var->name); - println(" .value 0x6666"); - println(" rex64"); - println(" call __tls_get_addr@PLT"); - return; - } - - // Function or global variable - println(" mov %s@GOTPCREL(%%rip), %%rax", node->var->name); - return; - } - - // Thread-local variable - if (node->var->is_tls) { - println(" mov %%fs:0, %%rax"); - println(" add $%s@tpoff, %%rax", node->var->name); - return; - } - - // Here, we generate an absolute address of a function or a global - // variable. Even though they exist at a certain address at runtime, - // their addresses are not known at link-time for the following - // two reasons. - // - // - Address randomization: Executables are loaded to memory as a - // whole but it is not known what address they are loaded to. - // Therefore, at link-time, relative address in the same - // exectuable (i.e. the distance between two functions in the - // same executable) is known, but the absolute address is not - // known. - // - // - Dynamic linking: Dynamic shared objects (DSOs) or .so files - // are loaded to memory alongside an executable at runtime and - // linked by the runtime loader in memory. We know nothing - // about addresses of global stuff that may be defined by DSOs - // until the runtime relocation is complete. - // - // In order to deal with the former case, we use RIP-relative - // addressing, denoted by `(%rip)`. For the latter, we obtain an - // address of a stuff that may be in a shared object file from the - // Global Offset Table using `@GOTPCREL(%rip)` notation. - - // Function - if (node->ty->kind == TY_FUNC) { - if (node->var->is_definition) - println(" lea %s(%%rip), %%rax", node->var->name); - else - println(" mov %s@GOTPCREL(%%rip), %%rax", node->var->name); - return; - } - - // Global variable - println(" lea %s(%%rip), %%rax", node->var->name); - return; - case ND_DEREF: - gen_expr(node->lhs); - return; - case ND_COMMA: - gen_expr(node->lhs); - gen_addr(node->rhs); - return; - case ND_MEMBER: - gen_addr(node->lhs); - println(" add $%d, %%rax", node->member->offset); - return; - case ND_FUNCALL: - if (node->ret_buffer) { - gen_expr(node); - return; - } - break; - case ND_ASSIGN: - case ND_COND: - if (node->ty->kind == TY_STRUCT || node->ty->kind == TY_UNION) { - gen_expr(node); - return; - } - break; - case ND_VLA_PTR: - println(" lea %d(%%rbp), %%rax", node->var->offset); - return; - } - - error_tok(node->tok, "not an lvalue"); -} - -// Load a value from where %rax is pointing to. -static void load(Type *ty) { - switch (ty->kind) { - case TY_ARRAY: - case TY_STRUCT: - case TY_UNION: - case TY_FUNC: - case TY_VLA: - // If it is an array, do not attempt to load a value to the - // register because in general we can't load an entire array to a - // register. As a result, the result of an evaluation of an array - // becomes not the array itself but the address of the array. - // This is where "array is automatically converted to a pointer to - // the first element of the array in C" occurs. - return; - case TY_FLOAT: - println(" movss (%%rax), %%xmm0"); - return; - case TY_DOUBLE: - println(" movsd (%%rax), %%xmm0"); - return; - case TY_LDOUBLE: - println(" fldt (%%rax)"); - return; - } - - char *insn = ty->is_unsigned ? "movz" : "movs"; - - // When we load a char or a short value to a register, we always - // extend them to the size of int, so we can assume the lower half of - // a register always contains a valid value. The upper half of a - // register for char, short and int may contain garbage. When we load - // a long value to a register, it simply occupies the entire register. - if (ty->size == 1) - println(" %sbl (%%rax), %%eax", insn); - else if (ty->size == 2) - println(" %swl (%%rax), %%eax", insn); - else if (ty->size == 4) - println(" movsxd (%%rax), %%rax"); - else - println(" mov (%%rax), %%rax"); -} - -// Store %rax to an address that the stack top is pointing to. -static void store(Type *ty) { - pop("%rdi"); - - switch (ty->kind) { - case TY_STRUCT: - case TY_UNION: - for (int i = 0; i < ty->size; i++) { - println(" mov %d(%%rax), %%r8b", i); - println(" mov %%r8b, %d(%%rdi)", i); - } - return; - case TY_FLOAT: - println(" movss %%xmm0, (%%rdi)"); - return; - case TY_DOUBLE: - println(" movsd %%xmm0, (%%rdi)"); - return; - case TY_LDOUBLE: - println(" fstpt (%%rdi)"); - return; - } - - if (ty->size == 1) - println(" mov %%al, (%%rdi)"); - else if (ty->size == 2) - println(" mov %%ax, (%%rdi)"); - else if (ty->size == 4) - println(" mov %%eax, (%%rdi)"); - else - println(" mov %%rax, (%%rdi)"); -} - -static void cmp_zero(Type *ty) { - switch (ty->kind) { - case TY_FLOAT: - println(" xorps %%xmm1, %%xmm1"); - println(" ucomiss %%xmm1, %%xmm0"); - return; - case TY_DOUBLE: - println(" xorpd %%xmm1, %%xmm1"); - println(" ucomisd %%xmm1, %%xmm0"); - return; - case TY_LDOUBLE: - println(" fldz"); - println(" fucomip"); - println(" fstp %%st(0)"); - return; - } - - if (is_integer(ty) && ty->size <= 4) - println(" cmp $0, %%eax"); - else - println(" cmp $0, %%rax"); -} - -enum { I8, I16, I32, I64, U8, U16, U32, U64, F32, F64, F80 }; - -static int getTypeId(Type *ty) { - switch (ty->kind) { - case TY_CHAR: - return ty->is_unsigned ? U8 : I8; - case TY_SHORT: - return ty->is_unsigned ? U16 : I16; - case TY_INT: - return ty->is_unsigned ? U32 : I32; - case TY_LONG: - return ty->is_unsigned ? U64 : I64; - case TY_FLOAT: - return F32; - case TY_DOUBLE: - return F64; - case TY_LDOUBLE: - return F80; - } - return U64; -} - -// The table for type casts -static char i32i8[] = "movsbl %al, %eax"; -static char i32u8[] = "movzbl %al, %eax"; -static char i32i16[] = "movswl %ax, %eax"; -static char i32u16[] = "movzwl %ax, %eax"; -static char i32f32[] = "cvtsi2ssl %eax, %xmm0"; -static char i32i64[] = "movsxd %eax, %rax"; -static char i32f64[] = "cvtsi2sdl %eax, %xmm0"; -static char i32f80[] = "mov %eax, -4(%rsp); fildl -4(%rsp)"; - -static char u32f32[] = "mov %eax, %eax; cvtsi2ssq %rax, %xmm0"; -static char u32i64[] = "mov %eax, %eax"; -static char u32f64[] = "mov %eax, %eax; cvtsi2sdq %rax, %xmm0"; -static char u32f80[] = "mov %eax, %eax; mov %rax, -8(%rsp); fildll -8(%rsp)"; - -static char i64f32[] = "cvtsi2ssq %rax, %xmm0"; -static char i64f64[] = "cvtsi2sdq %rax, %xmm0"; -static char i64f80[] = "movq %rax, -8(%rsp); fildll -8(%rsp)"; - -static char u64f32[] = "cvtsi2ssq %rax, %xmm0"; -static char u64f64[] = - "test %rax,%rax; js 1f; pxor %xmm0,%xmm0; cvtsi2sd %rax,%xmm0; jmp 2f; " - "1: mov %rax,%rdi; and $1,%eax; pxor %xmm0,%xmm0; shr %rdi; " - "or %rax,%rdi; cvtsi2sd %rdi,%xmm0; addsd %xmm0,%xmm0; 2:"; -static char u64f80[] = - "mov %rax, -8(%rsp); fildq -8(%rsp); test %rax, %rax; jns 1f;" - "mov $1602224128, %eax; mov %eax, -4(%rsp); fadds -4(%rsp); 1:"; - -static char f32i8[] = "cvttss2sil %xmm0, %eax; movsbl %al, %eax"; -static char f32u8[] = "cvttss2sil %xmm0, %eax; movzbl %al, %eax"; -static char f32i16[] = "cvttss2sil %xmm0, %eax; movswl %ax, %eax"; -static char f32u16[] = "cvttss2sil %xmm0, %eax; movzwl %ax, %eax"; -static char f32i32[] = "cvttss2sil %xmm0, %eax"; -static char f32u32[] = "cvttss2siq %xmm0, %rax"; -static char f32i64[] = "cvttss2siq %xmm0, %rax"; -static char f32u64[] = "cvttss2siq %xmm0, %rax"; -static char f32f64[] = "cvtss2sd %xmm0, %xmm0"; -static char f32f80[] = "movss %xmm0, -4(%rsp); flds -4(%rsp)"; - -static char f64i8[] = "cvttsd2sil %xmm0, %eax; movsbl %al, %eax"; -static char f64u8[] = "cvttsd2sil %xmm0, %eax; movzbl %al, %eax"; -static char f64i16[] = "cvttsd2sil %xmm0, %eax; movswl %ax, %eax"; -static char f64u16[] = "cvttsd2sil %xmm0, %eax; movzwl %ax, %eax"; -static char f64i32[] = "cvttsd2sil %xmm0, %eax"; -static char f64u32[] = "cvttsd2siq %xmm0, %rax"; -static char f64i64[] = "cvttsd2siq %xmm0, %rax"; -static char f64u64[] = "cvttsd2siq %xmm0, %rax"; -static char f64f32[] = "cvtsd2ss %xmm0, %xmm0"; -static char f64f80[] = "movsd %xmm0, -8(%rsp); fldl -8(%rsp)"; - -#define FROM_F80_1 \ - "fnstcw -10(%rsp); movzwl -10(%rsp), %eax; or $12, %ah; " \ - "mov %ax, -12(%rsp); fldcw -12(%rsp); " - -#define FROM_F80_2 " -24(%rsp); fldcw -10(%rsp); " - -static char f80i8[] = FROM_F80_1 "fistps" FROM_F80_2 "movsbl -24(%rsp), %eax"; -static char f80u8[] = FROM_F80_1 "fistps" FROM_F80_2 "movzbl -24(%rsp), %eax"; -static char f80i16[] = FROM_F80_1 "fistps" FROM_F80_2 "movzbl -24(%rsp), %eax"; -static char f80u16[] = FROM_F80_1 "fistpl" FROM_F80_2 "movswl -24(%rsp), %eax"; -static char f80i32[] = FROM_F80_1 "fistpl" FROM_F80_2 "mov -24(%rsp), %eax"; -static char f80u32[] = FROM_F80_1 "fistpl" FROM_F80_2 "mov -24(%rsp), %eax"; -static char f80i64[] = FROM_F80_1 "fistpq" FROM_F80_2 "mov -24(%rsp), %rax"; -static char f80u64[] = FROM_F80_1 "fistpq" FROM_F80_2 "mov -24(%rsp), %rax"; -static char f80f32[] = "fstps -8(%rsp); movss -8(%rsp), %xmm0"; -static char f80f64[] = "fstpl -8(%rsp); movsd -8(%rsp), %xmm0"; - -static char *cast_table[][11] = { - // i8 i16 i32 i64 u8 u16 u32 u64 f32 f64 f80 - {NULL, NULL, NULL, i32i64, i32u8, i32u16, NULL, i32i64, i32f32, i32f64, i32f80}, // i8 - {i32i8, NULL, NULL, i32i64, i32u8, i32u16, NULL, i32i64, i32f32, i32f64, i32f80}, // i16 - {i32i8, i32i16, NULL, i32i64, i32u8, i32u16, NULL, i32i64, i32f32, i32f64, i32f80}, // i32 - {i32i8, i32i16, NULL, NULL, i32u8, i32u16, NULL, NULL, i64f32, i64f64, i64f80}, // i64 - - {i32i8, NULL, NULL, i32i64, NULL, NULL, NULL, i32i64, i32f32, i32f64, i32f80}, // u8 - {i32i8, i32i16, NULL, i32i64, i32u8, NULL, NULL, i32i64, i32f32, i32f64, i32f80}, // u16 - {i32i8, i32i16, NULL, u32i64, i32u8, i32u16, NULL, u32i64, u32f32, u32f64, u32f80}, // u32 - {i32i8, i32i16, NULL, NULL, i32u8, i32u16, NULL, NULL, u64f32, u64f64, u64f80}, // u64 - - {f32i8, f32i16, f32i32, f32i64, f32u8, f32u16, f32u32, f32u64, NULL, f32f64, f32f80}, // f32 - {f64i8, f64i16, f64i32, f64i64, f64u8, f64u16, f64u32, f64u64, f64f32, NULL, f64f80}, // f64 - {f80i8, f80i16, f80i32, f80i64, f80u8, f80u16, f80u32, f80u64, f80f32, f80f64, NULL}, // f80 -}; - -static void cast(Type *from, Type *to) { - if (to->kind == TY_VOID) - return; - - if (to->kind == TY_BOOL) { - cmp_zero(from); - println(" setne %%al"); - println(" movzx %%al, %%eax"); - return; - } - - int t1 = getTypeId(from); - int t2 = getTypeId(to); - if (cast_table[t1][t2]) - println(" %s", cast_table[t1][t2]); -} - -// Structs or unions equal or smaller than 16 bytes are passed -// using up to two registers. -// -// If the first 8 bytes contains only floating-point type members, -// they are passed in an XMM register. Otherwise, they are passed -// in a general-purpose register. -// -// If a struct/union is larger than 8 bytes, the same rule is -// applied to the the next 8 byte chunk. -// -// This function returns true if `ty` has only floating-point -// members in its byte range [lo, hi). -static bool has_flonum(Type *ty, int lo, int hi, int offset) { - if (ty->kind == TY_STRUCT || ty->kind == TY_UNION) { - for (Member *mem = ty->members; mem; mem = mem->next) - if (!has_flonum(mem->ty, lo, hi, offset + mem->offset)) - return false; - return true; - } - - if (ty->kind == TY_ARRAY) { - for (int i = 0; i < ty->array_len; i++) - if (!has_flonum(ty->base, lo, hi, offset + ty->base->size * i)) - return false; - return true; - } - - return offset < lo || hi <= offset || ty->kind == TY_FLOAT || ty->kind == TY_DOUBLE; -} - -static bool has_flonum1(Type *ty) { - return has_flonum(ty, 0, 8, 0); -} - -static bool has_flonum2(Type *ty) { - return has_flonum(ty, 8, 16, 0); -} - -static void push_struct(Type *ty) { - int sz = align_to(ty->size, 8); - println(" sub $%d, %%rsp", sz); - depth += sz / 8; - - for (int i = 0; i < ty->size; i++) { - println(" mov %d(%%rax), %%r10b", i); - println(" mov %%r10b, %d(%%rsp)", i); - } -} - -static void push_args2(Node *args, bool first_pass) { - if (!args) - return; - push_args2(args->next, first_pass); - - if ((first_pass && !args->pass_by_stack) || (!first_pass && args->pass_by_stack)) - return; - - gen_expr(args); - - switch (args->ty->kind) { - case TY_STRUCT: - case TY_UNION: - push_struct(args->ty); - break; - case TY_FLOAT: - case TY_DOUBLE: - pushf(); - break; - case TY_LDOUBLE: - println(" sub $16, %%rsp"); - println(" fstpt (%%rsp)"); - depth += 2; - break; - default: - push(); - } -} - -// Load function call arguments. Arguments are already evaluated and -// stored to the stack as local variables. What we need to do in this -// function is to load them to registers or push them to the stack as -// specified by the x86-64 psABI. Here is what the spec says: -// -// - Up to 6 arguments of integral type are passed using RDI, RSI, -// RDX, RCX, R8 and R9. -// -// - Up to 8 arguments of floating-point type are passed using XMM0 to -// XMM7. -// -// - If all registers of an appropriate type are already used, push an -// argument to the stack in the right-to-left order. -// -// - Each argument passed on the stack takes 8 bytes, and the end of -// the argument area must be aligned to a 16 byte boundary. -// -// - If a function is variadic, set the number of floating-point type -// arguments to RAX. -static int push_args(Node *node) { - int stack = 0, gp = 0, fp = 0; - - // If the return type is a large struct/union, the caller passes - // a pointer to a buffer as if it were the first argument. - if (node->ret_buffer && node->ty->size > 16) - gp++; - - // Load as many arguments to the registers as possible. - for (Node *arg = node->args; arg; arg = arg->next) { - Type *ty = arg->ty; - - switch (ty->kind) { - case TY_STRUCT: - case TY_UNION: - if (ty->size > 16) { - arg->pass_by_stack = true; - stack += align_to(ty->size, 8) / 8; - } else { - bool fp1 = has_flonum1(ty); - bool fp2 = has_flonum2(ty); - - if (fp + fp1 + fp2 < FP_MAX && gp + !fp1 + !fp2 < GP_MAX) { - fp = fp + fp1 + fp2; - gp = gp + !fp1 + !fp2; - } else { - arg->pass_by_stack = true; - stack += align_to(ty->size, 8) / 8; - } - } - break; - case TY_FLOAT: - case TY_DOUBLE: - if (fp++ >= FP_MAX) { - arg->pass_by_stack = true; - stack++; - } - break; - case TY_LDOUBLE: - arg->pass_by_stack = true; - stack += 2; - break; - default: - if (gp++ >= GP_MAX) { - arg->pass_by_stack = true; - stack++; - } - } - } - - if ((depth + stack) % 2 == 1) { - println(" sub $8, %%rsp"); - depth++; - stack++; - } - - push_args2(node->args, true); - push_args2(node->args, false); - - // If the return type is a large struct/union, the caller passes - // a pointer to a buffer as if it were the first argument. - if (node->ret_buffer && node->ty->size > 16) { - println(" lea %d(%%rbp), %%rax", node->ret_buffer->offset); - push(); - } - - return stack; -} - -static void copy_ret_buffer(Obj *var) { - Type *ty = var->ty; - int gp = 0, fp = 0; - - if (has_flonum1(ty)) { - assert(ty->size == 4 || 8 <= ty->size); - if (ty->size == 4) - println(" movss %%xmm0, %d(%%rbp)", var->offset); - else - println(" movsd %%xmm0, %d(%%rbp)", var->offset); - fp++; - } else { - for (int i = 0; i < MIN(8, ty->size); i++) { - println(" mov %%al, %d(%%rbp)", var->offset + i); - println(" shr $8, %%rax"); - } - gp++; - } - - if (ty->size > 8) { - if (has_flonum2(ty)) { - assert(ty->size == 12 || ty->size == 16); - if (ty->size == 12) - println(" movss %%xmm%d, %d(%%rbp)", fp, var->offset + 8); - else - println(" movsd %%xmm%d, %d(%%rbp)", fp, var->offset + 8); - } else { - char *reg1 = (gp == 0) ? "%al" : "%dl"; - char *reg2 = (gp == 0) ? "%rax" : "%rdx"; - for (int i = 8; i < MIN(16, ty->size); i++) { - println(" mov %s, %d(%%rbp)", reg1, var->offset + i); - println(" shr $8, %s", reg2); - } - } - } -} - -static void copy_struct_reg(void) { - Type *ty = current_fn->ty->return_ty; - int gp = 0, fp = 0; - - println(" mov %%rax, %%rdi"); - - if (has_flonum(ty, 0, 8, 0)) { - assert(ty->size == 4 || 8 <= ty->size); - if (ty->size == 4) - println(" movss (%%rdi), %%xmm0"); - else - println(" movsd (%%rdi), %%xmm0"); - fp++; - } else { - println(" mov $0, %%rax"); - for (int i = MIN(8, ty->size) - 1; i >= 0; i--) { - println(" shl $8, %%rax"); - println(" mov %d(%%rdi), %%al", i); - } - gp++; - } - - if (ty->size > 8) { - if (has_flonum(ty, 8, 16, 0)) { - assert(ty->size == 12 || ty->size == 16); - if (ty->size == 4) - println(" movss 8(%%rdi), %%xmm%d", fp); - else - println(" movsd 8(%%rdi), %%xmm%d", fp); - } else { - char *reg1 = (gp == 0) ? "%al" : "%dl"; - char *reg2 = (gp == 0) ? "%rax" : "%rdx"; - println(" mov $0, %s", reg2); - for (int i = MIN(16, ty->size) - 1; i >= 8; i--) { - println(" shl $8, %s", reg2); - println(" mov %d(%%rdi), %s", i, reg1); - } - } - } -} - -static void copy_struct_mem(void) { - Type *ty = current_fn->ty->return_ty; - Obj *var = current_fn->params; - - println(" mov %d(%%rbp), %%rdi", var->offset); - - for (int i = 0; i < ty->size; i++) { - println(" mov %d(%%rax), %%dl", i); - println(" mov %%dl, %d(%%rdi)", i); - } -} - -static void builtin_alloca(void) { - // Align size to 16 bytes. - println(" add $15, %%rdi"); - println(" and $0xfffffff0, %%edi"); - - // Shift the temporary area by %rdi. - println(" mov %d(%%rbp), %%rcx", current_fn->alloca_bottom->offset); - println(" sub %%rsp, %%rcx"); - println(" mov %%rsp, %%rax"); - println(" sub %%rdi, %%rsp"); - println(" mov %%rsp, %%rdx"); - println("1:"); - println(" cmp $0, %%rcx"); - println(" je 2f"); - println(" mov (%%rax), %%r8b"); - println(" mov %%r8b, (%%rdx)"); - println(" inc %%rdx"); - println(" inc %%rax"); - println(" dec %%rcx"); - println(" jmp 1b"); - println("2:"); - - // Move alloca_bottom pointer. - println(" mov %d(%%rbp), %%rax", current_fn->alloca_bottom->offset); - println(" sub %%rdi, %%rax"); - println(" mov %%rax, %d(%%rbp)", current_fn->alloca_bottom->offset); -} - -// Generate code for a given node. -static void gen_expr(Node *node) { - println(" .loc %d %d", node->tok->file->file_no, node->tok->line_no); - - switch (node->kind) { - case ND_NULL_EXPR: - return; - case ND_NUM: { - switch (node->ty->kind) { - case TY_FLOAT: { - union { float f32; uint32_t u32; } u = { node->fval }; - println(" mov $%u, %%eax # float %Lf", u.u32, node->fval); - println(" movq %%rax, %%xmm0"); - return; - } - case TY_DOUBLE: { - union { double f64; uint64_t u64; } u = { node->fval }; - println(" mov $%lu, %%rax # double %Lf", u.u64, node->fval); - println(" movq %%rax, %%xmm0"); - return; - } - case TY_LDOUBLE: { - union { long double f80; uint64_t u64[2]; } u; - memset(&u, 0, sizeof(u)); - u.f80 = node->fval; - println(" mov $%lu, %%rax # long double %Lf", u.u64[0], node->fval); - println(" mov %%rax, -16(%%rsp)"); - println(" mov $%lu, %%rax", u.u64[1]); - println(" mov %%rax, -8(%%rsp)"); - println(" fldt -16(%%rsp)"); - return; - } - } - - println(" mov $%ld, %%rax", node->val); - return; - } - case ND_NEG: - gen_expr(node->lhs); - - switch (node->ty->kind) { - case TY_FLOAT: - println(" mov $1, %%rax"); - println(" shl $31, %%rax"); - println(" movq %%rax, %%xmm1"); - println(" xorps %%xmm1, %%xmm0"); - return; - case TY_DOUBLE: - println(" mov $1, %%rax"); - println(" shl $63, %%rax"); - println(" movq %%rax, %%xmm1"); - println(" xorpd %%xmm1, %%xmm0"); - return; - case TY_LDOUBLE: - println(" fchs"); - return; - } - - println(" neg %%rax"); - return; - case ND_VAR: - gen_addr(node); - load(node->ty); - return; - case ND_MEMBER: { - gen_addr(node); - load(node->ty); - - Member *mem = node->member; - if (mem->is_bitfield) { - println(" shl $%d, %%rax", 64 - mem->bit_width - mem->bit_offset); - if (mem->ty->is_unsigned) - println(" shr $%d, %%rax", 64 - mem->bit_width); - else - println(" sar $%d, %%rax", 64 - mem->bit_width); - } - return; - } - case ND_DEREF: - gen_expr(node->lhs); - load(node->ty); - return; - case ND_ADDR: - gen_addr(node->lhs); - return; - case ND_ASSIGN: - gen_addr(node->lhs); - push(); - gen_expr(node->rhs); - - if (node->lhs->kind == ND_MEMBER && node->lhs->member->is_bitfield) { - println(" mov %%rax, %%r8"); - - // If the lhs is a bitfield, we need to read the current value - // from memory and merge it with a new value. - Member *mem = node->lhs->member; - println(" mov %%rax, %%rdi"); - println(" and $%ld, %%rdi", (1L << mem->bit_width) - 1); - println(" shl $%d, %%rdi", mem->bit_offset); - - println(" mov (%%rsp), %%rax"); - load(mem->ty); - - long mask = ((1L << mem->bit_width) - 1) << mem->bit_offset; - println(" mov $%ld, %%r9", ~mask); - println(" and %%r9, %%rax"); - println(" or %%rdi, %%rax"); - store(node->ty); - println(" mov %%r8, %%rax"); - return; - } - - store(node->ty); - return; - case ND_STMT_EXPR: - for (Node *n = node->body; n; n = n->next) - gen_stmt(n); - return; - case ND_COMMA: - gen_expr(node->lhs); - gen_expr(node->rhs); - return; - case ND_CAST: - gen_expr(node->lhs); - cast(node->lhs->ty, node->ty); - return; - case ND_MEMZERO: - // `rep stosb` is equivalent to `memset(%rdi, %al, %rcx)`. - println(" mov $%d, %%rcx", node->var->ty->size); - println(" lea %d(%%rbp), %%rdi", node->var->offset); - println(" mov $0, %%al"); - println(" rep stosb"); - return; - case ND_COND: { - int c = count(); - gen_expr(node->cond); - cmp_zero(node->cond->ty); - println(" je .L.else.%d", c); - gen_expr(node->then); - println(" jmp .L.end.%d", c); - println(".L.else.%d:", c); - gen_expr(node->els); - println(".L.end.%d:", c); - return; - } - case ND_NOT: - gen_expr(node->lhs); - cmp_zero(node->lhs->ty); - println(" sete %%al"); - println(" movzx %%al, %%rax"); - return; - case ND_BITNOT: - gen_expr(node->lhs); - println(" not %%rax"); - return; - case ND_LOGAND: { - int c = count(); - gen_expr(node->lhs); - cmp_zero(node->lhs->ty); - println(" je .L.false.%d", c); - gen_expr(node->rhs); - cmp_zero(node->rhs->ty); - println(" je .L.false.%d", c); - println(" mov $1, %%rax"); - println(" jmp .L.end.%d", c); - println(".L.false.%d:", c); - println(" mov $0, %%rax"); - println(".L.end.%d:", c); - return; - } - case ND_LOGOR: { - int c = count(); - gen_expr(node->lhs); - cmp_zero(node->lhs->ty); - println(" jne .L.true.%d", c); - gen_expr(node->rhs); - cmp_zero(node->rhs->ty); - println(" jne .L.true.%d", c); - println(" mov $0, %%rax"); - println(" jmp .L.end.%d", c); - println(".L.true.%d:", c); - println(" mov $1, %%rax"); - println(".L.end.%d:", c); - return; - } - case ND_FUNCALL: { - if (node->lhs->kind == ND_VAR && !strcmp(node->lhs->var->name, "alloca")) { - gen_expr(node->args); - println(" mov %%rax, %%rdi"); - builtin_alloca(); - return; - } - - int stack_args = push_args(node); - gen_expr(node->lhs); - - int gp = 0, fp = 0; - - // If the return type is a large struct/union, the caller passes - // a pointer to a buffer as if it were the first argument. - if (node->ret_buffer && node->ty->size > 16) - pop(argreg64[gp++]); - - for (Node *arg = node->args; arg; arg = arg->next) { - Type *ty = arg->ty; - - switch (ty->kind) { - case TY_STRUCT: - case TY_UNION: - if (ty->size > 16) - continue; - - bool fp1 = has_flonum1(ty); - bool fp2 = has_flonum2(ty); - - if (fp + fp1 + fp2 < FP_MAX && gp + !fp1 + !fp2 < GP_MAX) { - if (fp1) - popf(fp++); - else - pop(argreg64[gp++]); - - if (ty->size > 8) { - if (fp2) - popf(fp++); - else - pop(argreg64[gp++]); - } - } - break; - case TY_FLOAT: - case TY_DOUBLE: - if (fp < FP_MAX) - popf(fp++); - break; - case TY_LDOUBLE: - break; - default: - if (gp < GP_MAX) - pop(argreg64[gp++]); - } - } - - println(" mov %%rax, %%r10"); - println(" mov $%d, %%rax", fp); - println(" call *%%r10"); - println(" add $%d, %%rsp", stack_args * 8); - - depth -= stack_args; - - // It looks like the most significant 48 or 56 bits in RAX may - // contain garbage if a function return type is short or bool/char, - // respectively. We clear the upper bits here. - switch (node->ty->kind) { - case TY_BOOL: - println(" movzx %%al, %%eax"); - return; - case TY_CHAR: - if (node->ty->is_unsigned) - println(" movzbl %%al, %%eax"); - else - println(" movsbl %%al, %%eax"); - return; - case TY_SHORT: - if (node->ty->is_unsigned) - println(" movzwl %%ax, %%eax"); - else - println(" movswl %%ax, %%eax"); - return; - } - - // If the return type is a small struct, a value is returned - // using up to two registers. - if (node->ret_buffer && node->ty->size <= 16) { - copy_ret_buffer(node->ret_buffer); - println(" lea %d(%%rbp), %%rax", node->ret_buffer->offset); - } - - return; - } - case ND_LABEL_VAL: - println(" lea %s(%%rip), %%rax", node->unique_label); - return; - case ND_CAS: { - gen_expr(node->cas_addr); - push(); - gen_expr(node->cas_new); - push(); - gen_expr(node->cas_old); - println(" mov %%rax, %%r8"); - load(node->cas_old->ty->base); - pop("%rdx"); // new - pop("%rdi"); // addr - - int sz = node->cas_addr->ty->base->size; - println(" lock cmpxchg %s, (%%rdi)", reg_dx(sz)); - println(" sete %%cl"); - println(" je 1f"); - println(" mov %s, (%%r8)", reg_ax(sz)); - println("1:"); - println(" movzbl %%cl, %%eax"); - return; - } - case ND_EXCH: { - gen_expr(node->lhs); - push(); - gen_expr(node->rhs); - pop("%rdi"); - - int sz = node->lhs->ty->base->size; - println(" xchg %s, (%%rdi)", reg_ax(sz)); - return; - } - } - - switch (node->lhs->ty->kind) { - case TY_FLOAT: - case TY_DOUBLE: { - gen_expr(node->rhs); - pushf(); - gen_expr(node->lhs); - popf(1); - - char *sz = (node->lhs->ty->kind == TY_FLOAT) ? "ss" : "sd"; - - switch (node->kind) { - case ND_ADD: - println(" add%s %%xmm1, %%xmm0", sz); - return; - case ND_SUB: - println(" sub%s %%xmm1, %%xmm0", sz); - return; - case ND_MUL: - println(" mul%s %%xmm1, %%xmm0", sz); - return; - case ND_DIV: - println(" div%s %%xmm1, %%xmm0", sz); - return; - case ND_EQ: - case ND_NE: - case ND_LT: - case ND_LE: - println(" ucomi%s %%xmm0, %%xmm1", sz); - - if (node->kind == ND_EQ) { - println(" sete %%al"); - println(" setnp %%dl"); - println(" and %%dl, %%al"); - } else if (node->kind == ND_NE) { - println(" setne %%al"); - println(" setp %%dl"); - println(" or %%dl, %%al"); - } else if (node->kind == ND_LT) { - println(" seta %%al"); - } else { - println(" setae %%al"); - } - - println(" and $1, %%al"); - println(" movzb %%al, %%rax"); - return; - } - - error_tok(node->tok, "invalid expression"); - } - case TY_LDOUBLE: { - gen_expr(node->lhs); - gen_expr(node->rhs); - - switch (node->kind) { - case ND_ADD: - println(" faddp"); - return; - case ND_SUB: - println(" fsubrp"); - return; - case ND_MUL: - println(" fmulp"); - return; - case ND_DIV: - println(" fdivrp"); - return; - case ND_EQ: - case ND_NE: - case ND_LT: - case ND_LE: - println(" fcomip"); - println(" fstp %%st(0)"); - - if (node->kind == ND_EQ) - println(" sete %%al"); - else if (node->kind == ND_NE) - println(" setne %%al"); - else if (node->kind == ND_LT) - println(" seta %%al"); - else - println(" setae %%al"); - - println(" movzb %%al, %%rax"); - return; - } - - error_tok(node->tok, "invalid expression"); - } - } - - gen_expr(node->rhs); - push(); - gen_expr(node->lhs); - pop("%rdi"); - - char *ax, *di, *dx; - - if (node->lhs->ty->kind == TY_LONG || node->lhs->ty->base) { - ax = "%rax"; - di = "%rdi"; - dx = "%rdx"; - } else { - ax = "%eax"; - di = "%edi"; - dx = "%edx"; - } - - switch (node->kind) { - case ND_ADD: - println(" add %s, %s", di, ax); - return; - case ND_SUB: - println(" sub %s, %s", di, ax); - return; - case ND_MUL: - println(" imul %s, %s", di, ax); - return; - case ND_DIV: - case ND_MOD: - if (node->ty->is_unsigned) { - println(" mov $0, %s", dx); - println(" div %s", di); - } else { - if (node->lhs->ty->size == 8) - println(" cqo"); - else - println(" cdq"); - println(" idiv %s", di); - } - - if (node->kind == ND_MOD) - println(" mov %%rdx, %%rax"); - return; - case ND_BITAND: - println(" and %s, %s", di, ax); - return; - case ND_BITOR: - println(" or %s, %s", di, ax); - return; - case ND_BITXOR: - println(" xor %s, %s", di, ax); - return; - case ND_EQ: - case ND_NE: - case ND_LT: - case ND_LE: - println(" cmp %s, %s", di, ax); - - if (node->kind == ND_EQ) { - println(" sete %%al"); - } else if (node->kind == ND_NE) { - println(" setne %%al"); - } else if (node->kind == ND_LT) { - if (node->lhs->ty->is_unsigned) - println(" setb %%al"); - else - println(" setl %%al"); - } else if (node->kind == ND_LE) { - if (node->lhs->ty->is_unsigned) - println(" setbe %%al"); - else - println(" setle %%al"); - } - - println(" movzb %%al, %%rax"); - return; - case ND_SHL: - println(" mov %%rdi, %%rcx"); - println(" shl %%cl, %s", ax); - return; - case ND_SHR: - println(" mov %%rdi, %%rcx"); - if (node->lhs->ty->is_unsigned) - println(" shr %%cl, %s", ax); - else - println(" sar %%cl, %s", ax); - return; - } - - error_tok(node->tok, "invalid expression"); -} - -static void gen_stmt(Node *node) { - println(" .loc %d %d", node->tok->file->file_no, node->tok->line_no); - - switch (node->kind) { - case ND_IF: { - int c = count(); - gen_expr(node->cond); - cmp_zero(node->cond->ty); - println(" je .L.else.%d", c); - gen_stmt(node->then); - println(" jmp .L.end.%d", c); - println(".L.else.%d:", c); - if (node->els) - gen_stmt(node->els); - println(".L.end.%d:", c); - return; - } - case ND_FOR: { - int c = count(); - if (node->init) - gen_stmt(node->init); - println(".L.begin.%d:", c); - if (node->cond) { - gen_expr(node->cond); - cmp_zero(node->cond->ty); - println(" je %s", node->brk_label); - } - gen_stmt(node->then); - println("%s:", node->cont_label); - if (node->inc) - gen_expr(node->inc); - println(" jmp .L.begin.%d", c); - println("%s:", node->brk_label); - return; - } - case ND_DO: { - int c = count(); - println(".L.begin.%d:", c); - gen_stmt(node->then); - println("%s:", node->cont_label); - gen_expr(node->cond); - cmp_zero(node->cond->ty); - println(" jne .L.begin.%d", c); - println("%s:", node->brk_label); - return; - } - case ND_SWITCH: - gen_expr(node->cond); - - for (Node *n = node->case_next; n; n = n->case_next) { - char *ax = (node->cond->ty->size == 8) ? "%rax" : "%eax"; - char *di = (node->cond->ty->size == 8) ? "%rdi" : "%edi"; - - if (n->begin == n->end) { - println(" cmp $%ld, %s", n->begin, ax); - println(" je %s", n->label); - continue; - } - - // [GNU] Case ranges - println(" mov %s, %s", ax, di); - println(" sub $%ld, %s", n->begin, di); - println(" cmp $%ld, %s", n->end - n->begin, di); - println(" jbe %s", n->label); - } - - if (node->default_case) - println(" jmp %s", node->default_case->label); - - println(" jmp %s", node->brk_label); - gen_stmt(node->then); - println("%s:", node->brk_label); - return; - case ND_CASE: - println("%s:", node->label); - gen_stmt(node->lhs); - return; - case ND_BLOCK: - for (Node *n = node->body; n; n = n->next) - gen_stmt(n); - return; - case ND_GOTO: - println(" jmp %s", node->unique_label); - return; - case ND_GOTO_EXPR: - gen_expr(node->lhs); - println(" jmp *%%rax"); - return; - case ND_LABEL: - println("%s:", node->unique_label); - gen_stmt(node->lhs); - return; - case ND_RETURN: - if (node->lhs) { - gen_expr(node->lhs); - Type *ty = node->lhs->ty; - - switch (ty->kind) { - case TY_STRUCT: - case TY_UNION: - if (ty->size <= 16) - copy_struct_reg(); - else - copy_struct_mem(); - break; - } - } - - println(" jmp .L.return.%s", current_fn->name); - return; - case ND_EXPR_STMT: - gen_expr(node->lhs); - return; - case ND_ASM: - println(" %s", node->asm_str); - return; - } - - error_tok(node->tok, "invalid statement"); -} - -// Assign offsets to local variables. -static void assign_lvar_offsets(Obj *prog) { - for (Obj *fn = prog; fn; fn = fn->next) { - if (!fn->is_function) - continue; - - // If a function has many parameters, some parameters are - // inevitably passed by stack rather than by register. - // The first passed-by-stack parameter resides at RBP+16. - int top = 16; - int bottom = 0; - - int gp = 0, fp = 0; - - // Assign offsets to pass-by-stack parameters. - for (Obj *var = fn->params; var; var = var->next) { - Type *ty = var->ty; - - switch (ty->kind) { - case TY_STRUCT: - case TY_UNION: - if (ty->size <= 16) { - bool fp1 = has_flonum(ty, 0, 8, 0); - bool fp2 = has_flonum(ty, 8, 16, 8); - if (fp + fp1 + fp2 < FP_MAX && gp + !fp1 + !fp2 < GP_MAX) { - fp = fp + fp1 + fp2; - gp = gp + !fp1 + !fp2; - continue; - } - } - break; - case TY_FLOAT: - case TY_DOUBLE: - if (fp++ < FP_MAX) - continue; - break; - case TY_LDOUBLE: - break; - default: - if (gp++ < GP_MAX) - continue; - } - - top = align_to(top, 8); - var->offset = top; - top += var->ty->size; - } - - // Assign offsets to pass-by-register parameters and local variables. - for (Obj *var = fn->locals; var; var = var->next) { - if (var->offset) - continue; - - // AMD64 System V ABI has a special alignment rule for an array of - // length at least 16 bytes. We need to align such array to at least - // 16-byte boundaries. See p.14 of - // https://github.com/hjl-tools/x86-psABI/wiki/x86-64-psABI-draft.pdf. - int align = (var->ty->kind == TY_ARRAY && var->ty->size >= 16) - ? MAX(16, var->align) : var->align; - - bottom += var->ty->size; - bottom = align_to(bottom, align); - var->offset = -bottom; - } - - fn->stack_size = align_to(bottom, 16); - } -} - -static void emit_data(Obj *prog) { - for (Obj *var = prog; var; var = var->next) { - if (var->is_function || !var->is_definition) - continue; - - if (var->is_static) - println(" .local %s", var->name); - else - println(" .globl %s", var->name); - - int align = (var->ty->kind == TY_ARRAY && var->ty->size >= 16) - ? MAX(16, var->align) : var->align; - - // Common symbol - if (opt_fcommon && var->is_tentative) { - println(" .comm %s, %d, %d", var->name, var->ty->size, align); - continue; - } - - // .data or .tdata - if (var->init_data) { - if (var->is_tls) - println(" .section .tdata,\"awT\",@progbits"); - else - println(" .data"); - - println(" .type %s, @object", var->name); - println(" .size %s, %d", var->name, var->ty->size); - println(" .align %d", align); - println("%s:", var->name); - - Relocation *rel = var->rel; - int pos = 0; - while (pos < var->ty->size) { - if (rel && rel->offset == pos) { - println(" .quad %s%+ld", *rel->label, rel->addend); - rel = rel->next; - pos += 8; - } else { - println(" .byte %d", var->init_data[pos++]); - } - } - continue; - } - - // .bss or .tbss - if (var->is_tls) - println(" .section .tbss,\"awT\",@nobits"); - else - println(" .bss"); - - println(" .align %d", align); - println("%s:", var->name); - println(" .zero %d", var->ty->size); - } -} - -static void store_fp(int r, int offset, int sz) { - switch (sz) { - case 4: - println(" movss %%xmm%d, %d(%%rbp)", r, offset); - return; - case 8: - println(" movsd %%xmm%d, %d(%%rbp)", r, offset); - return; - } - unreachable(); -} - -static void store_gp(int r, int offset, int sz) { - switch (sz) { - case 1: - println(" mov %s, %d(%%rbp)", argreg8[r], offset); - return; - case 2: - println(" mov %s, %d(%%rbp)", argreg16[r], offset); - return; - case 4: - println(" mov %s, %d(%%rbp)", argreg32[r], offset); - return; - case 8: - println(" mov %s, %d(%%rbp)", argreg64[r], offset); - return; - default: - for (int i = 0; i < sz; i++) { - println(" mov %s, %d(%%rbp)", argreg8[r], offset + i); - println(" shr $8, %s", argreg64[r]); - } - return; - } -} - -static void emit_text(Obj *prog) { - for (Obj *fn = prog; fn; fn = fn->next) { - if (!fn->is_function || !fn->is_definition) - continue; - - // No code is emitted for "static inline" functions - // if no one is referencing them. - if (!fn->is_live) - continue; - - if (fn->is_static) - println(" .local %s", fn->name); - else - println(" .globl %s", fn->name); - - println(" .text"); - println(" .type %s, @function", fn->name); - println("%s:", fn->name); - current_fn = fn; - - // Prologue - println(" push %%rbp"); - println(" mov %%rsp, %%rbp"); - println(" sub $%d, %%rsp", fn->stack_size); - println(" mov %%rsp, %d(%%rbp)", fn->alloca_bottom->offset); - - // Save arg registers if function is variadic - if (fn->va_area) { - int gp = 0, fp = 0; - for (Obj *var = fn->params; var; var = var->next) { - if (is_flonum(var->ty)) - fp++; - else - gp++; - } - - int off = fn->va_area->offset; - - // va_elem - println(" movl $%d, %d(%%rbp)", gp * 8, off); // gp_offset - println(" movl $%d, %d(%%rbp)", fp * 8 + 48, off + 4); // fp_offset - println(" movq %%rbp, %d(%%rbp)", off + 8); // overflow_arg_area - println(" addq $16, %d(%%rbp)", off + 8); - println(" movq %%rbp, %d(%%rbp)", off + 16); // reg_save_area - println(" addq $%d, %d(%%rbp)", off + 24, off + 16); - - // __reg_save_area__ - println(" movq %%rdi, %d(%%rbp)", off + 24); - println(" movq %%rsi, %d(%%rbp)", off + 32); - println(" movq %%rdx, %d(%%rbp)", off + 40); - println(" movq %%rcx, %d(%%rbp)", off + 48); - println(" movq %%r8, %d(%%rbp)", off + 56); - println(" movq %%r9, %d(%%rbp)", off + 64); - println(" movsd %%xmm0, %d(%%rbp)", off + 72); - println(" movsd %%xmm1, %d(%%rbp)", off + 80); - println(" movsd %%xmm2, %d(%%rbp)", off + 88); - println(" movsd %%xmm3, %d(%%rbp)", off + 96); - println(" movsd %%xmm4, %d(%%rbp)", off + 104); - println(" movsd %%xmm5, %d(%%rbp)", off + 112); - println(" movsd %%xmm6, %d(%%rbp)", off + 120); - println(" movsd %%xmm7, %d(%%rbp)", off + 128); - } - - // Save passed-by-register arguments to the stack - int gp = 0, fp = 0; - for (Obj *var = fn->params; var; var = var->next) { - if (var->offset > 0) - continue; - - Type *ty = var->ty; - - switch (ty->kind) { - case TY_STRUCT: - case TY_UNION: - assert(ty->size <= 16); - if (has_flonum(ty, 0, 8, 0)) - store_fp(fp++, var->offset, MIN(8, ty->size)); - else - store_gp(gp++, var->offset, MIN(8, ty->size)); - - if (ty->size > 8) { - if (has_flonum(ty, 8, 16, 0)) - store_fp(fp++, var->offset + 8, ty->size - 8); - else - store_gp(gp++, var->offset + 8, ty->size - 8); - } - break; - case TY_FLOAT: - case TY_DOUBLE: - store_fp(fp++, var->offset, ty->size); - break; - default: - store_gp(gp++, var->offset, ty->size); - } - } - - // Emit code - gen_stmt(fn->body); - assert(depth == 0); - - // [https://www.sigbus.info/n1570#5.1.2.2.3p1] The C spec defines - // a special rule for the main function. Reaching the end of the - // main function is equivalent to returning 0, even though the - // behavior is undefined for the other functions. - if (strcmp(fn->name, "main") == 0) - println(" mov $0, %%rax"); - - // Epilogue - println(".L.return.%s:", fn->name); - println(" mov %%rbp, %%rsp"); - println(" pop %%rbp"); - println(" ret"); - } -} - -void codegen(Obj *prog, FILE *out) { - output_file = out; - - File **files = get_input_files(); - for (int i = 0; files[i]; i++) - println(" .file %d \"%s\"", files[i]->file_no, files[i]->name); - - assign_lvar_offsets(prog); - emit_data(prog); - emit_text(prog); -} -- cgit v1.2.3