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x86: Add vec_duplicate<mode> expander

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Add vec_duplicate<mode> expander for SSE2 if we can move from GPR to SSE
register directly.

	* config/i386/i386-expand.c (ix86_expand_vector_init_duplicate):
	Make it global.
	* config/i386/i386-protos.h (ix86_expand_vector_init_duplicate):
	New prototype.
	* config/i386/sse.md (INT_BROADCAST_MODE): New mode iterator.
	(vec_duplicate<mode>): New expander.
This commit is contained in:
H.J. Lu 2021-06-07 14:23:04 -07:00
parent edafb35bda
commit 51c30227fa
3 changed files with 34 additions and 4 deletions
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5
gcc/config/i386/i386-expand.c
View File

@ -93,9 +93,6 @@ along with GCC; see the file COPYING3. If not see
#include "i386-builtins.h"
#include "i386-expand.h"
static bool ix86_expand_vector_init_duplicate (bool, machine_mode, rtx,
rtx);
/* Split one or more double-mode RTL references into pairs of half-mode
references. The RTL can be REG, offsettable MEM, integer constant, or
CONST_DOUBLE. "operands" is a pointer to an array of double-mode RTLs to
@ -13909,7 +13906,7 @@ static bool expand_vec_perm_1 (struct expand_vec_perm_d *d);
/* A subroutine of ix86_expand_vector_init. Store into TARGET a vector
with all elements equal to VAR. Return true if successful. */
static bool
bool
ix86_expand_vector_init_duplicate (bool mmx_ok, machine_mode mode,
rtx target, rtx val)
{

2
gcc/config/i386/i386-protos.h
View File

@ -258,6 +258,8 @@ extern void ix86_expand_mul_widen_hilo (rtx, rtx, rtx, bool, bool);
extern void ix86_expand_sse2_mulv4si3 (rtx, rtx, rtx);
extern void ix86_expand_sse2_mulvxdi3 (rtx, rtx, rtx);
extern void ix86_expand_sse2_abs (rtx, rtx);
extern bool ix86_expand_vector_init_duplicate (bool, machine_mode, rtx,
rtx);
/* In i386-c.c */
extern void ix86_target_macros (void);

31
gcc/config/i386/sse.md
View File

@ -24814,3 +24814,34 @@
"TARGET_WIDEKL"
"aes<aeswideklvariant>\t{%0}"
[(set_attr "type" "other")])
;; Modes handled by broadcast patterns. NB: Allow V64QI and V32HI with
;; TARGET_AVX512F since ix86_expand_vector_init_duplicate can expand
;; without TARGET_AVX512BW which is used by memset vector broadcast
;; expander to XI with:
;; vmovd %edi, %xmm15
;; vpbroadcastb %xmm15, %ymm15
;; vinserti64x4 $0x1, %ymm15, %zmm15, %zmm15
(define_mode_iterator INT_BROADCAST_MODE
[(V64QI "TARGET_AVX512F") (V32QI "TARGET_AVX") V16QI
(V32HI "TARGET_AVX512F") (V16HI "TARGET_AVX") V8HI
(V16SI "TARGET_AVX512F") (V8SI "TARGET_AVX") V4SI
(V8DI "TARGET_AVX512F && TARGET_64BIT")
(V4DI "TARGET_AVX && TARGET_64BIT") (V2DI "TARGET_64BIT")])
;; Broadcast from an integer. NB: Enable broadcast only if we can move
;; from GPR to SSE register directly.
(define_expand "vec_duplicate<mode>"
[(set (match_operand:INT_BROADCAST_MODE 0 "register_operand")
(vec_duplicate:INT_BROADCAST_MODE
(match_operand:<ssescalarmode> 1 "nonimmediate_operand")))]
"TARGET_SSE2 && TARGET_INTER_UNIT_MOVES_TO_VEC"
{
if (!ix86_expand_vector_init_duplicate (false,
GET_MODE (operands[0]),
operands[0],
operands[1]))
gcc_unreachable ();
DONE;
})