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Move add/immediate, sub/immediate slow paths out of line

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* libguile/jit.c (compile_call_scm_from_scm_uimm)
  (compile_call_scm_from_scm_uimm_slow): Move non-fixnum path out of
  line.
This commit is contained in:
Andy Wingo 2019-12-06 22:52:24 +01:00
parent d21c5a26da
commit fafa502875
1 changed files with 34 additions and 29 deletions
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63
libguile/jit.c
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@ -2603,57 +2603,62 @@ compile_call_scm_from_scm_scm_slow (scm_jit_state *j, uint8_t dst, uint8_t a, ui
static void
compile_call_scm_from_scm_uimm (scm_jit_state *j, uint8_t dst, uint8_t a, uint8_t b, uint32_t idx)
{
void *intrinsic = ((void **) &scm_vm_intrinsics)[idx];
int has_fast = 0;
jit_reloc_t fast;
jit_operand_t op_a = sp_scm_operand (j, a);
jit_operand_t op_b = jit_operand_imm (JIT_OPERAND_ABI_UINT8, b);
switch ((enum scm_vm_intrinsic) idx)
{
case SCM_VM_INTRINSIC_ADD_IMMEDIATE:
{
emit_sp_ref_scm (j, T0, a);
op_a = jit_operand_gpr (JIT_OPERAND_ABI_POINTER, T0);
scm_t_bits addend = b << 2;
jit_reloc_t not_inum = jit_bmci (j->jit, T0, 2);
fast = jit_bxaddi (j->jit, T0, addend);
has_fast = 1;
/* Restore previous value before slow path. */
jit_subi (j->jit, T0, T0, addend);
jit_patch_here (j->jit, not_inum);
add_slow_path_patch (j, jit_bmci (j->jit, T0, 2));
add_slow_path_patch (j, jit_boaddi (j->jit, T0, addend));
break;
}
case SCM_VM_INTRINSIC_SUB_IMMEDIATE:
{
emit_sp_ref_scm (j, T0, a);
op_a = jit_operand_gpr (JIT_OPERAND_ABI_POINTER, T0);
scm_t_bits subtrahend = b << 2;
jit_reloc_t not_inum = jit_bmci (j->jit, T0, 2);
fast = jit_bxsubi (j->jit, T0, subtrahend);
has_fast = 1;
/* Restore previous value before slow path. */
jit_addi (j->jit, T0, T0, subtrahend);
jit_patch_here (j->jit, not_inum);
add_slow_path_patch (j, jit_bmci (j->jit, T0, 2));
add_slow_path_patch (j, jit_bosubi (j->jit, T0, subtrahend));
break;
}
default:
break;
{
void *intrinsic = ((void **) &scm_vm_intrinsics)[idx];
jit_operand_t op_a = sp_scm_operand (j, a);
jit_operand_t op_b = jit_operand_imm (JIT_OPERAND_ABI_UINT8, b);
emit_store_current_ip (j, T1);
emit_call_2 (j, intrinsic, op_a, op_b);
emit_retval (j, T0);
emit_reload_sp (j);
break;
}
}
emit_store_current_ip (j, T1);
emit_call_2 (j, intrinsic, op_a, op_b);
emit_retval (j, T0);
emit_reload_sp (j);
if (has_fast)
jit_patch_here (j->jit, fast);
emit_sp_set_scm (j, dst, T0);
}
static void
compile_call_scm_from_scm_uimm_slow (scm_jit_state *j, uint8_t dst, uint8_t a, uint8_t b, uint32_t idx)
{
switch ((enum scm_vm_intrinsic) idx)
{
case SCM_VM_INTRINSIC_ADD_IMMEDIATE:
case SCM_VM_INTRINSIC_SUB_IMMEDIATE:
{
void *intrinsic = ((void **) &scm_vm_intrinsics)[idx];
jit_operand_t op_a = sp_scm_operand (j, a);
jit_operand_t op_b = jit_operand_imm (JIT_OPERAND_ABI_UINT8, b);
emit_store_current_ip (j, T1);
emit_call_2 (j, intrinsic, op_a, op_b);
emit_retval (j, T0);
emit_reload_sp (j);
emit_sp_set_scm (j, dst, T0);
continue_after_slow_path (j, j->next_ip);
break;
}
default:
break;
}
}
static void