py: Allow x86-64 to mov r16 to rm16 with extended src reg.
Fixes bug with x86-64 viper ptr16.
diff --git a/py/asmx64.c b/py/asmx64.c
index 3f11178..bca825b 100644
--- a/py/asmx64.c
+++ b/py/asmx64.c
@@ -311,9 +311,12 @@
}
void asm_x64_mov_r16_to_disp(asm_x64_t *as, int src_r64, int dest_r64, int dest_disp) {
- assert(src_r64 < 8);
assert(dest_r64 < 8);
- asm_x64_write_byte_2(as, OP_SIZE_PREFIX, OPCODE_MOV_R64_TO_RM64);
+ if (src_r64 < 8) {
+ asm_x64_write_byte_2(as, OP_SIZE_PREFIX, OPCODE_MOV_R64_TO_RM64);
+ } else {
+ asm_x64_write_byte_3(as, OP_SIZE_PREFIX, REX_PREFIX | REX_R, OPCODE_MOV_R64_TO_RM64);
+ }
asm_x64_write_r64_disp(as, src_r64, dest_r64, dest_disp);
}