Support for for-loop in native thumb.

dpgeorge · dpgeorge · commit 9b9e996df616 · 2013-11-03T14:25:43.000Z
diff --git a/py/asmthumb.c b/py/asmthumb.c
@@ -349,10 +349,13 @@ void asm_thumb_mov_reg_local(asm_thumb_t *as, uint rlo_dest, int local_num) {
     asm_thumb_write_op16(as, OP_LDR_FROM_SP_OFFSET(rlo_dest, word_offset));
 }
 
-void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint reg_dest, int local_num) {
-    assert(0);
-    // see format 12, load address
-    asm_thumb_write_op16(as, 0x0000);
+#define OP_ADD_REG_SP_OFFSET(rlo_dest, word_offset) (0xa800 | ((rlo_dest) << 8) | ((word_offset) & 0x00ff))
+
+void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint rlo_dest, int local_num) {
+    assert(rlo_dest < REG_R8);
+    int word_offset = as->num_locals - local_num - 1;
+    assert(as->pass < ASM_THUMB_PASS_3 || word_offset >= 0);
+    asm_thumb_write_op16(as, OP_ADD_REG_SP_OFFSET(rlo_dest, word_offset));
 }
 
 #define OP_ADD_REG_REG_REG(rlo_dest, rlo_src_a, rlo_src_b) (0x1800 | ((rlo_src_b) << 6) | ((rlo_src_a) << 3) | (rlo_dest))
diff --git a/py/asmthumb.h b/py/asmthumb.h
@@ -71,7 +71,7 @@ void asm_thumb_mov_reg_i32(asm_thumb_t *as, uint reg_dest, machine_uint_t i32_sr
 void asm_thumb_mov_reg_i32_optimised(asm_thumb_t *as, uint reg_dest, int i32_src); // convenience
 void asm_thumb_mov_local_reg(asm_thumb_t *as, int local_num_dest, uint rlo_src); // convenience
 void asm_thumb_mov_reg_local(asm_thumb_t *as, uint rlo_dest, int local_num); // convenience
-void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint reg_dest, int local_num); // convenience
+void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint rlo_dest, int local_num); // convenience
 
 void asm_thumb_add_reg_reg_reg(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, uint rlo_src_b); // convenience ?
 void asm_thumb_cmp_reg_reg(asm_thumb_t *as, uint rlo_a, uint rlo_b); // convenience ?
diff --git a/py/emitnative.c b/py/emitnative.c
@@ -965,10 +965,8 @@ static void emit_native_for_iter(emit_t *emit, int label) {
     asm_x64_cmp_r64_with_r64(emit->as, REG_RET, REG_TEMP1);
     asm_x64_jcc_label(emit->as, JCC_JE, label);
 #elif N_THUMB
-    assert(0); // XXX TODO
     asm_thumb_cmp_reg_reg(emit->as, REG_RET, REG_TEMP1);
-    // use it, b?
-    asm_thumb_b_label(emit->as, label);
+    asm_thumb_bcc_label(emit->as, THUMB_CC_EQ, label);
 #endif
     emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
 }
