Add scm->f64 intrinsic

* libguile/vm-engine.c (call-f64<-scm): New intrinsic kind.
  (scm->f64): Disable instruction.
* libguile/intrinsics.h (SCM_FOR_ALL_VM_INTRINSICS):
* libguile/intrinsics.c (scm_bootstrap_intrinsics):
* module/language/cps/reify-primitives.scm (compute-known-primitives):
* module/system/vm/assembler.scm (define-f64<-scm-intrinsic): Add scm->f64.

libguile/intrinsics.c

@@ -91,6 +91,7 @@ scm_bootstrap_intrinsics (void)
   scm_vm_intrinsics.string_to_symbol = scm_string_to_symbol;
   scm_vm_intrinsics.symbol_to_keyword = scm_symbol_to_keyword;
   scm_vm_intrinsics.class_of = scm_class_of;
+  scm_vm_intrinsics.scm_to_f64 = scm_to_double;
 
   scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION,
                             "scm_init_intrinsics",

libguile/intrinsics.h

@@ -27,6 +27,7 @@ typedef SCM (*scm_t_scm_from_scm_scm_intrinsic) (SCM, SCM);
 typedef SCM (*scm_t_scm_from_scm_uimm_intrinsic) (SCM, scm_t_uint8);
 typedef void (*scm_t_scm_u64_u64_intrinsic) (SCM, scm_t_uint64, scm_t_uint64);
 typedef SCM (*scm_t_scm_from_scm_intrinsic) (SCM);
+typedef double (*scm_t_f64_from_scm_intrinsic) (SCM);
 
 #define SCM_FOR_ALL_VM_INTRINSICS(M) \
   M(scm_from_scm_scm, add, "add", ADD) \
@@ -46,6 +47,7 @@ typedef SCM (*scm_t_scm_from_scm_intrinsic) (SCM);
   M(scm_from_scm, string_to_symbol, "string->symbol", STRING_TO_SYMBOL) \
   M(scm_from_scm, symbol_to_keyword, "symbol->keyword", SYMBOL_TO_KEYWORD) \
   M(scm_from_scm, class_of, "class-of", CLASS_OF) \
+  M(f64_from_scm, scm_to_f64, "scm->f64", SCM_TO_F64) \
   /* Add new intrinsics here; also update scm_bootstrap_intrinsics.  */
 
 enum scm_vm_intrinsic

libguile/vm-engine.c

@@ -1563,7 +1563,23 @@ VM_NAME (scm_i_thread *thread, struct scm_vm *vp,
       NEXT (2);
     }
 
-  VM_DEFINE_OP (55, unused_55, NULL, NOP)
+  VM_DEFINE_OP (55, call_f64_from_scm, "call-f64<-scm", OP2 (X8_S12_S12, C32) | OP_DST)
+    {
+      scm_t_uint8 dst, src;
+      double res;
+      scm_t_f64_from_scm_intrinsic intrinsic;
+
+      UNPACK_12_12 (op, dst, src);
+      intrinsic = intrinsics[ip[1]];
+
+      SYNC_IP ();
+      res = intrinsic (SP_REF (src));
+      CACHE_SP ();
+      SP_SET_F64 (dst, res);
+
+      NEXT (2);
+    }
+
   VM_DEFINE_OP (56, unused_56, NULL, NOP)
     {
       vm_error_bad_instruction (op);
@@ -2219,13 +2235,7 @@ VM_NAME (scm_i_thread *thread, struct scm_vm *vp,
       abort (); /* never reached */
     }
 
-  /* scm->f64 dst:12 src:12
-   *
-   * Unpack a raw double-precision floating-point value from SRC and
-   * place it in DST.  Note that SRC can be any value on which
-   * scm_to_double can operate.
-   */
-  VM_DEFINE_OP (136, scm_to_f64, "scm->f64", OP1 (X8_S12_S12) | OP_DST)
+  VM_DEFINE_OP (136, unused_136, NULL, NOP)
     {
       scm_t_uint16 dst, src;
       UNPACK_12_12 (op, dst, src);

module/language/cps/reify-primitives.scm

@@ -217,6 +217,7 @@
       string->symbol
       symbol->keyword
       class-of
+      scm->f64
       u64->s64
       s64->u64
       cache-current-module!

module/system/vm/assembler.scm

@@ -200,6 +200,7 @@
             emit-string->symbol
             emit-symbol->keyword
             emit-class-of
+            emit-scm->f64
 
             emit-call
             emit-call-label
@@ -261,7 +262,6 @@
             emit-srsh/immediate
             emit-ulsh/immediate
             emit-make-array
-            emit-scm->f64
             emit-load-f64
             emit-f64->scm
             emit-scm->u64
@@ -1294,6 +1294,9 @@ returned instead."
 (define-syntax-rule (define-scm<-scm-intrinsic name)
   (define-macro-assembler (name asm dst src)
     (emit-call-scm<-scm asm dst src (intrinsic-name->index 'name))))
+(define-syntax-rule (define-f64<-scm-intrinsic name)
+  (define-macro-assembler (name asm dst src)
+    (emit-call-f64<-scm asm dst src (intrinsic-name->index 'name))))
 
 (define-scm<-scm-scm-intrinsic add)
 (define-scm<-scm-uimm-intrinsic add/immediate)
@@ -1312,6 +1315,7 @@ returned instead."
 (define-scm<-scm-intrinsic string->symbol)
 (define-scm<-scm-intrinsic symbol->keyword)
 (define-scm<-scm-intrinsic class-of)
+(define-f64<-scm-intrinsic scm->f64)
 
 (define-macro-assembler (begin-program asm label properties)
   (emit-label asm label)