Merge pull request #42 from soxfox42/arm64_sign

Signedness for arm64

Author: MESYETI

source/backends/arm64.d

@@ -387,14 +387,25 @@ class BackendARM64 : CompilerBackend {
 			output ~= "ldr x9, [x9]\n";
 		}
 
-		switch (size) {
-			case 1: output ~= format("ldrb w9, [x9, #%d]\n", offset); break;
-			case 2: output ~= format("ldrh w9, [x9, #%d]\n", offset); break;
-			case 4: output ~= format("ldr w9, [x9, #%d]\n", offset); break;
-			case 8: output ~= format("ldr x9, [x9, #%d]\n", offset); break;
-			default: Error(node.error, "Bad variable type size");
+		if (var.type.isSigned) {
+			switch (size) {
+				case 1: output ~= format("ldrsb x9, [x9, #%d]\n", offset); break;
+				case 2: output ~= format("ldrsh x9, [x9, #%d]\n", offset); break;
+				case 4: output ~= format("ldrsw x9, [x9, #%d]\n", offset); break;
+				case 8: output ~= format("ldr x9, [x9, #%d]\n", offset); break;
+				default: Error(node.error, "Bad variable type size");
+			}
 		}
-
+		else {
+			switch (size) {
+				case 1: output ~= format("ldrb w9, [x9, #%d]\n", offset); break;
+				case 2: output ~= format("ldrh w9, [x9, #%d]\n", offset); break;
+				case 4: output ~= format("ldr w9, [x9, #%d]\n", offset); break;
+				case 8: output ~= format("ldr x9, [x9, #%d]\n", offset); break;
+				default: Error(node.error, "Bad variable type size");
+			}
+		}
+	
 		output ~= "str x9, [x19], #8\n";
 	}
 
@@ -415,12 +426,23 @@ class BackendARM64 : CompilerBackend {
 			base = "x20";
 		}
 
-		switch (size) {
-			case 1: output ~= format("ldrb w9, [%s, #%d]\n", base, offset); break;
-			case 2: output ~= format("ldrh w9, [%s, #%d]\n", base, offset); break;
-			case 4: output ~= format("ldr w9, [%s, #%d]\n", base, offset); break;
-			case 8: output ~= format("ldr x9, [%s, #%d]\n", base, offset); break;
-			default: Error(node.error, "Bad variable type size");
+		if (var.type.isSigned) {
+			switch (size) {
+				case 1: output ~= format("ldrsb x9, [%s, #%d]\n", base, offset); break;
+				case 2: output ~= format("ldrsh x9, [%s, #%d]\n", base, offset); break;
+				case 4: output ~= format("ldrsw x9, [%s, #%d]\n", base, offset); break;
+				case 8: output ~= format("ldr x9, [%s, #%d]\n", base, offset); break;
+				default: Error(node.error, "Bad variable type size");
+			}
+		}
+		else {
+			switch (size) {
+				case 1: output ~= format("ldrb w9, [%s, #%d]\n", base, offset); break;
+				case 2: output ~= format("ldrh w9, [%s, #%d]\n", base, offset); break;
+				case 4: output ~= format("ldr w9, [%s, #%d]\n", base, offset); break;
+				case 8: output ~= format("ldr x9, [%s, #%d]\n", base, offset); break;
+				default: Error(node.error, "Bad variable type size");
+			}
 		}
 
 		output ~= "str x9, [x19], #8\n";