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Add VM ops to pack and unpack raw f64 values.

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* libguile/vm-engine.c (scm->f64, f64->scm): New ops.
This commit is contained in:
Andy Wingo 2015-10-28 17:58:30 +00:00
parent fc87033bf0
commit 5bbc47b06d
1 changed files with 32 additions and 2 deletions
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34
libguile/vm-engine.c
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@ -251,6 +251,9 @@
#define SP_REF(i) (sp[i].as_scm)
#define SP_SET(i,o) (sp[i].as_scm = o)
#define SP_REF_F64(i) (sp[i].as_f64)
#define SP_SET_F64(i,o) (sp[i].as_f64 = o)
#define VARIABLE_REF(v) SCM_VARIABLE_REF (v)
#define VARIABLE_SET(v,o) SCM_VARIABLE_SET (v, o)
#define VARIABLE_BOUNDP(v) (!scm_is_eq (VARIABLE_REF (v), SCM_UNDEFINED))
@ -3216,8 +3219,35 @@ VM_NAME (scm_i_thread *thread, struct scm_vm *vp,
VM_DEFINE_OP (135, bv_f64_set, "bv-f64-set!", OP1 (X8_S8_S8_S8))
BV_FLOAT_SET (f64, ieee_double, double, 8);
VM_DEFINE_OP (136, unused_136, NULL, NOP)
VM_DEFINE_OP (137, unused_137, NULL, NOP)
/* 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)
{
scm_t_uint16 dst, src;
UNPACK_12_12 (op, dst, src);
SYNC_IP ();
SP_SET_F64 (dst, scm_to_double (SP_REF (src)));
NEXT (1);
}
/* f64->scm dst:12 src:12
*
* Pack a raw double-precision floating point value into an inexact
* number allocated on the heap.
*/
VM_DEFINE_OP (137, f64_to_scm, "f64->scm", OP1 (X8_S12_S12) | OP_DST)
{
scm_t_uint16 dst, src;
UNPACK_12_12 (op, dst, src);
SYNC_IP ();
SP_SET (dst, scm_from_double (SP_REF_F64 (src)));
NEXT (1);
}
VM_DEFINE_OP (138, unused_138, NULL, NOP)
VM_DEFINE_OP (139, unused_139, NULL, NOP)
VM_DEFINE_OP (140, unused_140, NULL, NOP)