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Start work on floats

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Maxwell
2026-01-22 19:09:26 +11:00
parent 3afb59929a
commit f9352cf59f
2 changed files with 161 additions and 32 deletions
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184
src/compiler.c
View File

@@ -4,6 +4,7 @@
#include "include/estr.h"
#include <stdint.h>
#include <inttypes.h>
#include <stdio.h>
VariableTable createVariableTable() {
VariableTable vt;
@@ -52,6 +53,39 @@ int getVariablePos(VariableTable* vt, const char* name) {
return -1;
}
DoubleTable createDoubleTable() {
DoubleTable dt;
dt.count = 0;
dt.capacity = 16;
dt.constants = malloc(sizeof(DoubleConstant) * 16);
return dt;
}
char* addDoubleConstant(DoubleTable* dt, Estr* rodata, double value, int* counter) {
for (size_t i = 0; i < dt->count; i++) {
if (dt->constants[i].value == value) {
return dt->constants[i].label;
}
}
if (dt->count >= dt->capacity) {
dt->capacity = dt->capacity == 0 ? 16 : dt->capacity * 2;
dt->constants = realloc(dt->constants, sizeof(DoubleConstant) * dt->capacity);
}
char label[64];
snprintf(label, sizeof(label), "float_const_%d", (*counter)++);
strcpy(dt->constants[dt->count].label, label);
dt->constants[dt->count].value = value;
dt->count++;
char line[128];
snprintf(line, 128, "%s: dq %.17g ; double constant\n", label, value);
APPEND_ESTR((*rodata), line);
return dt->constants[dt->count - 1].label;
}
GroundValueType getInstructionReturnType(GroundInstruction* gi, VariableTable* table) {
switch (gi->type) {
case JUMP:
@@ -287,6 +321,50 @@ GroundValueType getInstructionReturnType(GroundInstruction* gi, VariableTable* t
return INT;
}
char* processValueString(GroundArg arg, VariableTable* vt, GroundValueType* outType, DoubleTable* dt, Estr* rodata, int* doubleCounter) {
if (arg.type == VALREF) {
VariableInfo* var = getVariable(vt, arg.value.refName);
if (var && outType) *outType = var->type;
char* buf = malloc(260);
snprintf(buf, 260, "[%s]", arg.value.refName);
return buf;
}
if (arg.type == VALUE) {
if (outType) *outType = arg.value.value.type;
switch(arg.value.value.type) {
case INT: {
char* buf = malloc(64);
snprintf(buf, 64, "%" PRId64, arg.value.value.data.intVal);
return buf;
break;
}
case DOUBLE: {
char* label = addDoubleConstant(dt, rodata, arg.value.value.data.doubleVal, doubleCounter);
char* buf = malloc(128);
snprintf(buf, 128, "[rel %s]", label);
return buf;
break;
}
case BOOL:
return arg.value.value.data.boolVal ? "1" : "0";
break;
case CHAR: {
char* buf = malloc(8);
snprintf(buf, 8, "%d", (int)arg.value.value.data.charVal);
return buf;
break;
}
default: {
printf("For now, only int, bool, and char are supported data types in the compiler.");
exit(1);
break;
}
}
}
return NULL;
}
/*
char* processValueString(GroundArg arg) {
if (arg.type == VALREF) {
char* buf = malloc(sizeof(char) * 260);
@@ -320,11 +398,17 @@ char* processValueString(GroundArg arg) {
}
return NULL;
}
*/
char* compileGroundProgram(GroundProgram* program) {
Estr start = CREATE_ESTR("global _start\nsection .text\n_start:\n");
Estr data = CREATE_ESTR("section .bss\n");
Estr helpers = CREATE_ESTR("");
Estr rodata = CREATE_ESTR("section .rodata\n");
APPEND_ESTR(rodata, " newline_char: db 10\n");
APPEND_ESTR(rodata, " space_char: db 32\n");
DoubleTable doubleTable = createDoubleTable();
int doubleConstCounter = 0;
APPEND_ESTR(helpers, "\n; Helper: Print integer in rax\n");
APPEND_ESTR(helpers, "print_int:\n");
@@ -427,7 +511,7 @@ char* compileGroundProgram(GroundProgram* program) {
APPEND_ESTR(start, " ; set\n")
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1]));
APPEND_ESTR(start, processValueString(gi.args.args[1], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " mov [");
APPEND_ESTR(start, varName);
@@ -473,7 +557,7 @@ char* compileGroundProgram(GroundProgram* program) {
APPEND_ESTR(start, " ; if\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " test rax, rax\n");
APPEND_ESTR(start, " jnz ");
@@ -500,7 +584,7 @@ char* compileGroundProgram(GroundProgram* program) {
APPEND_ESTR(start, " ; not\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " xor rax, 1\n");
APPEND_ESTR(start, " mov [");
@@ -526,17 +610,55 @@ char* compileGroundProgram(GroundProgram* program) {
runtimeError(ARG_TYPE_MISMATCH, "Expecting a DirectRef for arg 3", &gi, i);
}
char* varName= gi.args.args[2].value.refName;
APPEND_ESTR(start, " ; add\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " add rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1]));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " mov [");
APPEND_ESTR(start, varName);
APPEND_ESTR(start, "], rax\n");
GroundValueType leftType, rightType;
char* left = processValueString(gi.args.args[0], &varTable, &leftType, &doubleTable, &rodata, &doubleConstCounter);
char* right = processValueString(gi.args.args[1], &varTable, &rightType, &doubleTable, &rodata, &doubleConstCounter);
char* varName = gi.args.args[2].value.refName;
bool isDouble = (leftType == DOUBLE || rightType == DOUBLE);
if (isDouble) {
APPEND_ESTR(start, " ; add (double)\n");
if (leftType == INT) {
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, left);
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " cvtsi2sd xmm0, rax ; Convert int to double\n");
} else {
APPEND_ESTR(start, " movsd xmm0, ");
APPEND_ESTR(start, left);
APPEND_ESTR(start, "\n");
}
if (rightType == INT) {
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, right);
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " cvtsi2sd xmm1, rax ; Convert int to double\n");
APPEND_ESTR(start, " addsd xmm0, xmm1\n");
} else {
APPEND_ESTR(start, " addsd xmm0, ");
APPEND_ESTR(start, right);
APPEND_ESTR(start, "\n");
}
APPEND_ESTR(start, " movsd [");
APPEND_ESTR(start, varName);
APPEND_ESTR(start, "], xmm0\n");
} else {
APPEND_ESTR(start, " ; add\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " add rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " mov [");
APPEND_ESTR(start, varName);
APPEND_ESTR(start, "], rax\n");
}
break;
}
case SUBTRACT: {
@@ -559,10 +681,10 @@ char* compileGroundProgram(GroundProgram* program) {
char* varName= gi.args.args[2].value.refName;
APPEND_ESTR(start, " ; subtract\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " sub rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1]));
APPEND_ESTR(start, processValueString(gi.args.args[1], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " mov [");
APPEND_ESTR(start, varName);
@@ -589,10 +711,10 @@ char* compileGroundProgram(GroundProgram* program) {
char* varName= gi.args.args[2].value.refName;
APPEND_ESTR(start, " ; multiply\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " imul rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1]));
APPEND_ESTR(start, processValueString(gi.args.args[1], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " mov [");
APPEND_ESTR(start, varName);
@@ -619,10 +741,10 @@ char* compileGroundProgram(GroundProgram* program) {
char* varName= gi.args.args[2].value.refName;
APPEND_ESTR(start, " ; equal\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " cmp rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1]));
APPEND_ESTR(start, processValueString(gi.args.args[1], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " sete al\n");
APPEND_ESTR(start, " movzx rax, al\n");
@@ -651,10 +773,10 @@ char* compileGroundProgram(GroundProgram* program) {
char* varName= gi.args.args[2].value.refName;
APPEND_ESTR(start, " ; inequal\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " cmp rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1]));
APPEND_ESTR(start, processValueString(gi.args.args[1], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " setne al\n");
APPEND_ESTR(start, " movzx rax, al\n");
@@ -683,10 +805,10 @@ char* compileGroundProgram(GroundProgram* program) {
char* varName= gi.args.args[2].value.refName;
APPEND_ESTR(start, " ; greater\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " cmp rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1]));
APPEND_ESTR(start, processValueString(gi.args.args[1], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " setg al\n");
APPEND_ESTR(start, " movzx rax, al\n");
@@ -715,10 +837,10 @@ char* compileGroundProgram(GroundProgram* program) {
char* varName= gi.args.args[2].value.refName;
APPEND_ESTR(start, " ; lesser\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " cmp rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[1]));
APPEND_ESTR(start, processValueString(gi.args.args[1], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " setl al\n");
APPEND_ESTR(start, " movzx rax, al\n");
@@ -748,7 +870,7 @@ char* compileGroundProgram(GroundProgram* program) {
}
APPEND_ESTR(start, " ; print int\n");
APPEND_ESTR(start, " mov rax, ");
APPEND_ESTR(start, processValueString(gi.args.args[j]));
APPEND_ESTR(start, processValueString(gi.args.args[j], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " call print_int\n");
}
@@ -773,7 +895,7 @@ char* compileGroundProgram(GroundProgram* program) {
APPEND_ESTR(start, " ; end\n");
APPEND_ESTR(start, " mov rax, 60\n");
APPEND_ESTR(start, " mov rdi, ");
APPEND_ESTR(start, processValueString(gi.args.args[0]));
APPEND_ESTR(start, processValueString(gi.args.args[0], &varTable, NULL, &doubleTable, &rodata, &doubleConstCounter));
APPEND_ESTR(start, "\n");
APPEND_ESTR(start, " syscall\n");
break;
@@ -793,10 +915,8 @@ char* compileGroundProgram(GroundProgram* program) {
APPEND_ESTR(complete, start.str);
APPEND_ESTR(complete, " ; End of program\n mov rax, 60\n mov rdi, 0\n syscall\n");
APPEND_ESTR(complete, helpers.str);
APPEND_ESTR(complete, "\nsection .rodata\n");
APPEND_ESTR(complete, "newline_char: db 10\n");
APPEND_ESTR(complete, "space_char: db 32\n");
APPEND_ESTR(complete, data.str)
APPEND_ESTR(complete, data.str);
APPEND_ESTR(complete, rodata.str);
return complete.str;
}

9
src/compiler.h
View File

@@ -16,4 +16,13 @@ typedef struct VariableTable {
size_t capacity;
} VariableTable;
typedef struct DoubleConstant {
double value;
char label[64];
} DoubleConstant;
typedef struct DoubleTable {
DoubleConstant* constants;
size_t count;
size_t capacity;
} DoubleTable;