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Remove implementation of lsh, rsh instructions

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* libguile/vm-engine.c: Remove implementation of now-gone instructions.
This commit is contained in:
Andy Wingo 2018-05-01 07:10:56 +02:00
parent 1532b570e5
commit 84cb7c45fd
1 changed files with 4 additions and 118 deletions
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122
libguile/vm-engine.c
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@ -3357,129 +3357,15 @@ VM_NAME (scm_i_thread *thread, struct scm_vm *vp,
VM_DEFINE_OP (249, unused_249, NULL, NOP)
VM_DEFINE_OP (250, unused_250, NULL, NOP)
VM_DEFINE_OP (251, unused_251, NULL, NOP)
VM_DEFINE_OP (252, unused_252, NULL, NOP)
VM_DEFINE_OP (253, unused_253, NULL, NOP)
VM_DEFINE_OP (254, unused_254, NULL, NOP)
VM_DEFINE_OP (255, unused_255, NULL, NOP)
{
vm_error_bad_instruction (op);
abort (); /* never reached */
}
VM_DEFINE_OP (252, unused_252, NULL, NOP)
{
scm_t_uint8 dst, x, y;
SCM a, result;
scm_t_uint64 b;
UNPACK_8_8_8 (op, dst, x, y);
a = SP_REF (x);
b = SP_REF_U64 (y);
if (SCM_LIKELY (SCM_I_INUMP (a))
&& b < (scm_t_uint64) (SCM_I_FIXNUM_BIT - 1)
&& ((scm_t_bits)
(SCM_SRS (SCM_I_INUM (a), (SCM_I_FIXNUM_BIT-1 - b)) + 1)
<= 1))
{
scm_t_signed_bits nn = SCM_I_INUM (a);
result = SCM_I_MAKINUM (nn < 0 ? -(-nn << b) : (nn << b));
}
else
{
SYNC_IP ();
/* B has to be a bignum. FIXME: use instruction explosion to
ensure that. */
result = scm_ash (a, scm_from_uint64 (b));
CACHE_SP ();
}
SP_SET (dst, result);
NEXT (1);
}
VM_DEFINE_OP (253, unused_253, NULL, NOP)
{
scm_t_uint8 dst, x, y;
SCM a, result;
scm_t_uint64 b;
UNPACK_8_8_8 (op, dst, x, y);
a = SP_REF (x);
b = SP_REF_U64 (y);
if (SCM_LIKELY (SCM_I_INUMP (a)))
{
if (b > (scm_t_uint64) (SCM_I_FIXNUM_BIT - 1))
b = SCM_I_FIXNUM_BIT - 1;
result = SCM_I_MAKINUM (SCM_SRS (SCM_I_INUM (a), b));
}
else
{
SYNC_IP ();
/* B has to be a bignum. FIXME: use instruction explosion to
ensure that. */
result = scm_ash (a, scm_difference (SCM_INUM0, scm_from_uint64 (b)));
CACHE_SP ();
}
SP_SET (dst, result);
NEXT (1);
}
VM_DEFINE_OP (254, unused_254, NULL, NOP)
{
scm_t_uint8 dst, x, y;
SCM a, result;
unsigned int b;
UNPACK_8_8_8 (op, dst, x, y);
a = SP_REF (x);
b = y;
if (SCM_LIKELY (SCM_I_INUMP (a))
&& b < (unsigned int) (SCM_I_FIXNUM_BIT - 1)
&& ((scm_t_bits)
(SCM_SRS (SCM_I_INUM (a), (SCM_I_FIXNUM_BIT-1 - b)) + 1)
<= 1))
{
scm_t_signed_bits nn = SCM_I_INUM (a);
result = SCM_I_MAKINUM (nn < 0 ? -(-nn << b) : (nn << b));
}
else
{
SYNC_IP ();
/* B has to be a bignum. FIXME: use instruction explosion to
ensure that. */
result = scm_ash (a, SCM_I_MAKINUM (b));
CACHE_SP ();
}
SP_SET (dst, result);
NEXT (1);
}
VM_DEFINE_OP (255, unused_255, NULL, NOP)
{
scm_t_uint8 dst, x, y;
SCM a, result;
int b;
UNPACK_8_8_8 (op, dst, x, y);
a = SP_REF (x);
b = y;
if (SCM_LIKELY (SCM_I_INUMP (a)))
{
if (b > (int) (SCM_I_FIXNUM_BIT - 1))
b = SCM_I_FIXNUM_BIT - 1;
result = SCM_I_MAKINUM (SCM_SRS (SCM_I_INUM (a), b));
}
else
{
SYNC_IP ();
/* B has to be a bignum. FIXME: use instruction explosion to
ensure that. */
result = scm_ash (a, SCM_I_MAKINUM (-b));
CACHE_SP ();
}
SP_SET (dst, result);
NEXT (1);
}
END_DISPATCH_SWITCH;
}