generators set up

.clangd

@@ -1,2 +1,2 @@
 CompileFlags:
-    Add: [-Wall, -Wextra, -pedantic, -O3]
+    Add: [-Wall, -Wextra, -O3]

Makefile

@@ -2,7 +2,7 @@ SRC=src
 OBJ=obj
 
 CC=gcc
-CFLAGS=-Wall -Wextra -fPIC -O3
+CFLAGS=-Wall -Wextra -fPIC -O3# -fsanitize=address -g
 
 TARGET=libgravity.so
 TEST_TARGET=testapp

include/gravity/core.h

@@ -10,6 +10,7 @@ typedef struct GravityOpaqueValue* GravityValue;
 typedef struct GravityOpaqueBuilder* GravityBuilder;
 typedef struct GravityOpaqueFunction* GravityFunction;
 typedef struct GravityOpaqueBlock* GravityBlock;
+typedef struct GravityOpaqueTargetArch* GravityTargetArch;
 
 typedef struct GravityOpaqueType* GravityType;
 typedef enum {
@@ -50,6 +51,11 @@ void gravityBuildRet(GravityBuilder builder, GravityValue returnValue);
 void gravityBuildBr(GravityBuilder builder, GravityValue condition, GravityBlock thenBranch, GravityValue* thenParams, GravityBlock elseBranch, GravityValue* elseParams);
 void gravityBuildJump(GravityBuilder builder, GravityBlock block, GravityValue* params);
 
+// targets
+char* gravityTargetEmitModule(GravityTargetArch arch, GravityModule module);
+
+GravityTargetArch gravityCreate_x86_64Target(void);
+
 // ============================ //
 
 #endif

src/generators/arch/x86_64.c

@@ -0,0 +1,60 @@
+#include "x86_64.h"
+
+void emitValue(GravityTargetArch self, GravityValue value) {
+    switch (value->kind) {
+        case GravityConstantValueKind: {
+            switch (value->type->typeKind) {
+                case GravityIntTypeKind: {
+                    sbAppend(self->outputBuffer, "%ld", value->constant.intValue);
+                    break;
+                }
+
+                default: assert(false);
+            }
+
+            break;
+        }
+
+        case GravityLocalValueKind: {
+
+        }
+
+        default: assert(false);
+    }
+}
+
+void emitRet(GravityTargetArch self, GravityValue value) {
+    sbAppend(self->outputBuffer, "mov eax, ");
+    emitValue(self, value);
+    sbAppend(self->outputBuffer, "\nret");
+}
+
+GravityValue emitIntConst(GravityTargetArch self, GravityValue constVal) {
+    return constVal;
+}
+
+void emitFunction(GravityTargetArch self, GravityFunction function) {
+    sbAppend(self->outputBuffer, "%s:\n", function->name);
+}
+
+void emitBlock(GravityTargetArch self, GravityBlock block) {
+    sbAppend(self->outputBuffer, ".%s:\n", block->name);
+}
+
+GravityTargetArch_x86_64 gravityCreate_x86_64Target(void) {
+    GravityTargetArch baseArch = gravityNewTargetArch("x86_64");
+
+    baseArch->emitFunction = emitFunction;
+    baseArch->emitBlock = emitBlock;
+
+    baseArch->emitIntConst = emitIntConst;
+    baseArch->emitRet = emitRet;
+
+    GravityTargetArch_x86_64 targetArch = {
+        .baseArch = baseArch,
+
+        .stackPos = 0
+    };
+
+    return targetArch;
+}

src/generators/arch/x86_64.h

@@ -0,0 +1,14 @@
+#ifndef __GRAVITY__X86_64_H
+#define __GRAVITY__X86_64_H
+
+#include "../generator.h"
+
+typedef struct {
+    GravityTargetArch baseArch;
+
+    uint32_t stackPos;
+} GravityTargetArch_x86_64;
+
+GravityTargetArch_x86_64 gravityCreate_x86_64Target(void);
+
+#endif

src/generators/generator.c

@@ -0,0 +1,53 @@
+#include "generator.h"
+
+GravityTargetArch gravityNewTargetArch(const char* name) {
+    GravityTargetArch targetArch = malloc(sizeof(struct GravityOpaqueTargetArch));
+    if (targetArch == NULL) return targetArch;
+
+    StringBuffer* outputBuff = malloc(sizeof(StringBuffer));
+    if (outputBuff == NULL) {
+        free(targetArch);
+        return NULL;
+    }
+
+    initStringBuff(outputBuff);
+    targetArch->outputBuffer = outputBuff;
+    targetArch->name = strdup(name);
+
+    return targetArch;
+}
+
+void gravityTargetEmitInst(GravityTargetArch arch, GravityInstruction inst) {
+    switch (inst.opcode) {
+        case GravityOpcodeIntConst: arch->emitIntConst(arch, inst.operands[0]); break;
+        case GravityOpcodeRet: arch->emitRet(arch, inst.operands[0]); break;
+
+        default: assert(false);
+    }
+}
+
+void gravityTargetEmitBlock(GravityTargetArch arch, GravityBlock block) {
+    arch->emitBlock(arch, block);
+
+    for (unsigned int i = 0; i < block->instructions.count; i++) {
+        gravityTargetEmitInst(arch, *get(block->instructions, i));
+    }
+}
+
+void gravityTargetEmitFunction(GravityTargetArch arch, GravityFunction function) {
+    arch->currentFunction = function;
+
+    arch->emitFunction(arch, function);
+
+    for (unsigned int i = 0; i < function->blocks.count; i++) {
+        gravityTargetEmitBlock(arch, *get(function->blocks, i));
+    }
+}
+
+char* gravityTargetEmitModule(GravityTargetArch arch, GravityModule module) {
+    for (unsigned int i = 0; i < module->functions.count; i++) {
+        gravityTargetEmitFunction(arch, *get(module->functions, i));
+    }
+
+    return arch->outputBuffer->data;
+}

src/generators/generator.h

@@ -2,13 +2,25 @@
 #define __GRAVITY__GENERATOR_H
 
 #include "../ir/module.h"
+#include "../ir/type.h"
 
-typedef struct GravityOpaqueGenerator* GravityGenerator;
-struct GravityOpaqueGenerator {
-    GravityModule module;
-    char* (*generateAssembly)(GravityGenerator self);
+typedef struct GravityOpaqueTargetArch* GravityTargetArch;
+
+struct GravityOpaqueTargetArch {
+    const char* name;
+    StringBuffer* outputBuffer;
+
+    GravityFunction currentFunction;
+
+    void (*emitFunction)(GravityTargetArch self, GravityFunction function);
+    void (*emitBlock)(GravityTargetArch self, GravityBlock block);
+    void (*emitValue)(GravityTargetArch self, GravityValue value);
+
+    GravityValue (*emitIntConst)(GravityTargetArch self, GravityValue constVal);
+    void (*emitRet)(GravityTargetArch self, GravityValue returnValue);
 };
 
-
+GravityTargetArch gravityNewTargetArch(const char* name);
+char* gravityTargetEmitModule(GravityTargetArch arch, GravityModule module);
 
 #endif

src/generators/linux_x86-64.c

@@ -1 +0,0 @@
-#include "generator.h"

test.c

@@ -7,12 +7,12 @@ int main(void) {
     GravityBuilder builder = gravityCreateBuilder();
 
     GravityType charType = gravityCreateIntegerType(8, false);
-    GravityType ptrType = gravityCreatePointerType();
     
     GravityType mainFuncType = gravityCreateFunctionType(0, NULL, charType);
     GravityFunction mainFunc = gravityNewFunction(module, "main", mainFuncType);
     GravityBlock entryBlock = gravityStartBlock("entry", mainFunc);
 
+    /*
     // define blocks
     GravityBlock thenBlock = gravityStartBlock("then", mainFunc);
     gravityAppendBlockArgument(thenBlock, ptrType);
@@ -48,9 +48,17 @@ int main(void) {
     gravityBuilderSwitchToBlock(builder, mergeBlock);
     GravityValue xVar = gravityGetBlockArg(mergeBlock, 0);
     GravityValue xValue = gravityBuildLoad(builder, xVar, "xValue");
-    gravityBuildRet(builder, xValue);
+    gravityBuildRet(builder, xValue);*/
+
+    gravityBuilderSwitchToBlock(builder, entryBlock);
+    GravityValue returnVal = gravityBuildIntConstant(builder, charType, 123, NULL);
+    gravityBuildRet(builder, returnVal);
 
     printf("%s\n", gravityFunctionToCStr(mainFunc));
 
+    GravityTargetArch target = gravityCreate_x86_64Target();
+    char* outputASM = gravityTargetEmitModule(target, module);
+    printf("%s\n", outputASM);
+
     return 0;
 }