update docs, fix float jmp

README.org

@@ -31,7 +31,7 @@
 
 ** Language Design
   - Strongly typed but with a friendly 'let' syntax.
-  - =real= type (fixed point Q16.16 by default). 
+  - =real= type (f32). 
   - =int= for integer numbers (i32).
   - =nat= for unsigned integer numbers (u32).
   - =byte= for interop (u8, i64, etc.).

src/opcodes.h

@@ -19,12 +19,12 @@ typedef struct {
 
 typedef enum {
   OP_HALT,           /* terminate execution */
-  OP_LOADI,          /* loads an int from memory */
-  OP_LOADU,          /* loads a uint from memory */
-  OP_LOADF,          /* loads a float from memory */
-  OP_STOREI,         /* stores a int to memory */
-  OP_STOREU,         /* stores a uint to memory */
-  OP_STOREF,         /* stores a float to memory */
+  OP_LOADI,          /* dest = next memory location as int */
+  OP_LOADU,          /* dest = next memory location as uint */
+  OP_LOADF,          /* dest = next memory location as float */
+  OP_STOREI,         /* next memory location = src1 as int */
+  OP_STOREU,         /* next memory location = src1 as uint */
+  OP_STOREF,         /* next memory location = src1 as float */
   OP_ADD_INT,        /* dest = src1 + src2  */
   OP_SUB_INT,        /* dest = src1 - src2  */
   OP_MUL_INT,        /* dest = src1 * src2  */

src/vm.c

@@ -139,16 +139,16 @@ uint32_t step_vm(VMFrame *frame, Value *memory) {
     COMPARE_AND_JUMP(int32_t, i, ==);
   }
   case OP_JGT_REAL: {
-    COMPARE_AND_JUMP(int32_t, u, >);
+    COMPARE_AND_JUMP(float, u, >);
   }
   case OP_JLT_REAL: {
-    COMPARE_AND_JUMP(int32_t, u, <);
+    COMPARE_AND_JUMP(float, u, <);
   }
   case OP_JGE_REAL: {
-    COMPARE_AND_JUMP(int32_t, u, >=);
+    COMPARE_AND_JUMP(float, u, >=);
   }
   case OP_JLE_REAL: {
-    COMPARE_AND_JUMP(int32_t, u, <=);
+    COMPARE_AND_JUMP(float, u, <=);
   }
   case OP_INT_TO_STRING: {
     int32_t a = (int32_t)frame->registers[src1].i;