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authorAndy Wingo <wingo@pobox.com>2015-11-19 22:12:04 +0100
committerAndy Wingo <wingo@pobox.com>2015-12-01 11:30:54 +0100
commit8464cc576c0fb9cf70a51450795338996cc785ce (patch)
tree34e6f783a54ba0a7c1e37e552f3461a1e1a0b535 /libguile/vm-engine.c
parent870ac91a4e6a8f75a6d0e246f034c9b4dcc70317 (diff)
downloadguile-8464cc576c0fb9cf70a51450795338996cc785ce.tar.gz
Add bv-length instruction
* libguile/vm-engine.c (bv-length): New instruction. * module/language/cps/compile-bytecode.scm (compile-function): * module/language/cps/effects-analysis.scm (bv-length): * module/language/cps/primitives.scm (*instruction-aliases*): * module/language/cps/slot-allocation.scm (compute-var-representations): * module/language/cps/types.scm (bv-length): * module/language/tree-il/compile-cps.scm (convert): Add support for bv-length. * module/system/vm/assembler.scm: Export emit-bv-length.
Diffstat (limited to 'libguile/vm-engine.c')
-rw-r--r--libguile/vm-engine.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/libguile/vm-engine.c b/libguile/vm-engine.c
index 44bd2569b..3e068a18a 100644
--- a/libguile/vm-engine.c
+++ b/libguile/vm-engine.c
@@ -3341,7 +3341,19 @@ VM_NAME (scm_i_thread *thread, struct scm_vm *vp,
NEXT (1);
}
- VM_DEFINE_OP (145, unused_145, NULL, NOP)
+ /* bv-length dst:12 src:12
+ *
+ * Store the length of the bytevector in SRC in DST, as an untagged
+ * 64-bit integer.
+ */
+ VM_DEFINE_OP (145, bv_length, "bv-length", OP1 (X8_S12_S12) | OP_DST)
+ {
+ ARGS1 (bv);
+ VM_VALIDATE_BYTEVECTOR (bv, "bytevector-length");
+ SP_SET_U64 (dst, SCM_BYTEVECTOR_LENGTH (bv));
+ NEXT (1);
+ }
+
VM_DEFINE_OP (146, unused_146, NULL, NOP)
VM_DEFINE_OP (147, unused_147, NULL, NOP)
VM_DEFINE_OP (148, unused_148, NULL, NOP)