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-rw-r--r--libguile/vm-engine.c31
1 files changed, 26 insertions, 5 deletions
diff --git a/libguile/vm-engine.c b/libguile/vm-engine.c
index fd681480c..b6b312cac 100644
--- a/libguile/vm-engine.c
+++ b/libguile/vm-engine.c
@@ -1431,10 +1431,15 @@ VM_NAME (scm_i_thread *thread, struct scm_vm *vp,
NEXT (1);
}
- VM_DEFINE_OP (47, unused_47, NULL, NOP)
+ VM_DEFINE_OP (47, tail_pointer_ref_immediate, "tail-pointer-ref/immediate", OP1 (X8_S8_S8_C8) | OP_DST)
{
- vm_error_bad_instruction (op);
- abort ();
+ scm_t_uint8 dst, obj, idx;
+
+ UNPACK_8_8_8 (op, dst, obj, idx);
+
+ SP_SET_PTR (dst, ((scm_t_bits *) SCM2PTR (SP_REF (obj))) + idx);
+
+ NEXT (1);
}
@@ -2206,8 +2211,24 @@ VM_NAME (scm_i_thread *thread, struct scm_vm *vp,
- VM_DEFINE_OP (81, unused_81, NULL, NOP)
- VM_DEFINE_OP (82, unused_82, NULL, NOP)
+ VM_DEFINE_OP (81, tag_char, "tag-char", OP1 (X8_S12_S12) | OP_DST)
+ {
+ scm_t_uint16 dst, src;
+ UNPACK_12_12 (op, dst, src);
+ SP_SET (dst,
+ SCM_MAKE_ITAG8 ((scm_t_bits) (scm_t_wchar) SP_REF_U64 (src),
+ scm_tc8_char));
+ NEXT (1);
+ }
+
+ VM_DEFINE_OP (82, untag_char, "untag-char", OP1 (X8_S12_S12) | OP_DST)
+ {
+ scm_t_uint16 dst, src;
+ UNPACK_12_12 (op, dst, src);
+ SP_SET_U64 (dst, SCM_CHAR (SP_REF (src)));
+ NEXT (1);
+ }
+
VM_DEFINE_OP (83, unused_83, NULL, NOP)
VM_DEFINE_OP (84, unused_84, NULL, NOP)
VM_DEFINE_OP (85, unused_85, NULL, NOP)