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Restrict alpha_convert_register_p

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This patch restricts alpha_convert_register_p from
"TYPE_LENGTH (type) != 8" to "TYPE_LENGTH (type) == 4", because,

 - we have check "TYPE_LENGTH (valtype) == 4" in alpha_register_to_value
   and alpha_value_to_register,
 - alpha lds and sts instruction access 4 bytes,
 - comments "It might need to convert the [float] register into the
   corresponding [integer] type (see Alpha)" and integer is 4-byte on
   alpha,

I think it is the right restrict condition to "TYPE_LENGTH (valtype) == 4".

gdb:

2017-05-24  Yao Qi  <yao.qi@linaro.org>

	* alpha-tdep.c (alpha_convert_register_p): Return true if type
	length is 4.
	(alpha_register_to_value): Remove type length check.
	(alpha_value_to_register): Likewise.
This commit is contained in:
Yao Qi 2017-05-24 22:15:23 +01:00
parent 88954b49e4
commit 68fce50f04
2 changed files with 16 additions and 18 deletions
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7
gdb/ChangeLog
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@ -1,3 +1,10 @@
2017-05-24 Yao Qi <yao.qi@linaro.org>
* alpha-tdep.c (alpha_convert_register_p): Return true if type
length is 4.
(alpha_register_to_value): Remove type length check.
(alpha_value_to_register): Likewise.
2017-05-24 Yao Qi <yao.qi@linaro.org>
* ia64-tdep.c (ia64_convert_register_p): Check type's code is

27
gdb/alpha-tdep.c
View File

@ -227,7 +227,7 @@ alpha_sts (struct gdbarch *gdbarch, void *out, const void *in)
/* The alpha needs a conversion between register and memory format if the
register is a floating point register and memory format is float, as the
register format must be double or memory format is an integer with 4
bytes or less, as the representation of integers in floating point
bytes, as the representation of integers in floating point
registers is different. */
static int
@ -235,7 +235,7 @@ alpha_convert_register_p (struct gdbarch *gdbarch, int regno,
struct type *type)
{
return (regno >= ALPHA_FP0_REGNUM && regno < ALPHA_FP0_REGNUM + 31
&& TYPE_LENGTH (type) != 8);
&& TYPE_LENGTH (type) == 4);
}
static int
@ -252,14 +252,10 @@ alpha_register_to_value (struct frame_info *frame, int regnum,
in, optimizedp, unavailablep))
return 0;
if (TYPE_LENGTH (valtype) == 4)
{
alpha_sts (gdbarch, out, in);
*optimizedp = *unavailablep = 0;
return 1;
}
error (_("Cannot retrieve value from floating point register"));
gdb_assert (TYPE_LENGTH (valtype) == 4);
alpha_sts (gdbarch, out, in);
*optimizedp = *unavailablep = 0;
return 1;
}
static void
@ -268,14 +264,9 @@ alpha_value_to_register (struct frame_info *frame, int regnum,
{
gdb_byte out[MAX_REGISTER_SIZE];
switch (TYPE_LENGTH (valtype))
{
case 4:
alpha_lds (get_frame_arch (frame), out, in);
break;
default:
error (_("Cannot store value in floating point register"));
}
gdb_assert (TYPE_LENGTH (valtype) == 4);
alpha_lds (get_frame_arch (frame), out, in);
put_frame_register (frame, regnum, out);
}