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Let GET_MODE_2XWIDER_MODE find a double-width vector mode. 

* genmodes.c (struct mode_data): Remove wider_2x member.
        (blank_mode): Adjust initializer.
        (calc_wider_mode): Use XALLOCAVEC.
        (emit_move_wider): Select double-width same-element vectors for
        2xwider vectors.
        * machmode.h (GET_MODE_2XWIDER_MODE): Update documentation.
        * config/i386/i386.c (doublesize_vector_mode): Remove.
        (expand_vselect_vconcat): Use GET_MODE_2XWIDER_MODE instead.

From-SVN: r182191
This commit is contained in:
Richard Henderson 2011-12-10 12:42:55 -08:00 committed by Richard Henderson
parent be94c03412
commit a7de2c2a71
4 changed files with 31 additions and 40 deletions
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11
gcc/ChangeLog
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@ -1,3 +1,14 @@
2011-12-10 Richard Henderson <rth@redhat.com>
* genmodes.c (struct mode_data): Remove wider_2x member.
(blank_mode): Adjust initializer.
(calc_wider_mode): Use XALLOCAVEC.
(emit_move_wider): Select double-width same-element vectors for
2xwider vectors.
* machmode.h (GET_MODE_2XWIDER_MODE): Update documentation.
* config/i386/i386.c (doublesize_vector_mode): Remove.
(expand_vselect_vconcat): Use GET_MODE_2XWIDER_MODE instead.
2011-12-10 Joern Rennecke <joern.rennecke@embecosm.com>
* config/epiphany/epiphany.h (USE_LOAD_POST_INCREMENT): Define.

36
gcc/config/i386/i386.c
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@ -35306,40 +35306,6 @@ ix86_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost,
}
}
/* Return a vector mode with twice as many elements as VMODE. */
/* ??? Consider moving this to a table generated by genmodes.c. */
static enum machine_mode
doublesize_vector_mode (enum machine_mode vmode)
{
switch (vmode)
{
case V2SFmode: return V4SFmode;
case V1DImode: return V2DImode;
case V2SImode: return V4SImode;
case V4HImode: return V8HImode;
case V8QImode: return V16QImode;
case V2DFmode: return V4DFmode;
case V4SFmode: return V8SFmode;
case V2DImode: return V4DImode;
case V4SImode: return V8SImode;
case V8HImode: return V16HImode;
case V16QImode: return V32QImode;
case V4DFmode: return V8DFmode;
case V8SFmode: return V16SFmode;
case V4DImode: return V8DImode;
case V8SImode: return V16SImode;
case V16HImode: return V32HImode;
case V32QImode: return V64QImode;
default:
gcc_unreachable ();
}
}
/* Construct (set target (vec_select op0 (parallel perm))) and
return true if that's a valid instruction in the active ISA. */
@ -35374,7 +35340,7 @@ expand_vselect_vconcat (rtx target, rtx op0, rtx op1,
enum machine_mode v2mode;
rtx x;
v2mode = doublesize_vector_mode (GET_MODE (op0));
v2mode = GET_MODE_2XWIDER_MODE (GET_MODE (op0));
x = gen_rtx_VEC_CONCAT (v2mode, op0, op1);
return expand_vselect (target, x, perm, nelt);
}

22
gcc/genmodes.c
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@ -63,7 +63,6 @@ struct mode_data
struct mode_data *component; /* mode of components */
struct mode_data *wider; /* next wider mode */
struct mode_data *wider_2x; /* 2x wider mode */
struct mode_data *contained; /* Pointer to list of modes that have
this mode as a component. */
@ -83,7 +82,7 @@ static struct mode_data *void_mode;
static const struct mode_data blank_mode = {
0, "<unknown>", MAX_MODE_CLASS,
-1U, -1U, -1U, -1U,
0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
"<unknown>", 0, 0, 0, 0
};
@ -790,7 +789,7 @@ calc_wider_mode (void)
/* Allocate max_n_modes + 1 entries to leave room for the extra null
pointer assigned after the qsort call below. */
sortbuf = (struct mode_data **) alloca ((max_n_modes + 1) * sizeof (struct mode_data *));
sortbuf = XALLOCAVEC (struct mode_data *, max_n_modes + 1);
for (c = 0; c < MAX_MODE_CLASS; c++)
{
@ -804,7 +803,6 @@ calc_wider_mode (void)
for (prev = 0, m = modes[c]; m; m = next)
{
m->wider = void_mode;
m->wider_2x = void_mode;
/* this is nreverse */
next = m->next;
@ -827,7 +825,6 @@ calc_wider_mode (void)
for (j = 0; j < i; j++)
sortbuf[j]->next = sortbuf[j]->wider = sortbuf[j + 1];
modes[c] = sortbuf[0];
}
}
@ -1062,6 +1059,21 @@ emit_mode_wider (void)
continue;
}
/* For vectors we want twice the number of components,
with the same element type. */
if (m->cl == MODE_VECTOR_INT
|| m->cl == MODE_VECTOR_FLOAT
|| m->cl == MODE_VECTOR_FRACT
|| m->cl == MODE_VECTOR_UFRACT
|| m->cl == MODE_VECTOR_ACCUM
|| m->cl == MODE_VECTOR_UACCUM)
{
if (m2->ncomponents != 2 * m->ncomponents)
continue;
if (m->component != m2->component)
continue;
}
break;
}
if (m2 == void_mode)

2
gcc/machmode.h
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@ -221,6 +221,8 @@ extern const unsigned char mode_nunits[NUM_MACHINE_MODES];
extern const unsigned char mode_wider[NUM_MACHINE_MODES];
#define GET_MODE_WIDER_MODE(MODE) ((enum machine_mode) mode_wider[MODE])
/* For scalars, this is a mode with twice the precision. For vectors,
this is a mode with the same inner mode but with twice the elements. */
extern const unsigned char mode_2xwider[NUM_MACHINE_MODES];
#define GET_MODE_2XWIDER_MODE(MODE) ((enum machine_mode) mode_2xwider[MODE])