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tcg/aarch64: Support vector bitwise select value 

The instruction set has 3 insns that perform the same operation,
only varying in which operand must overlap the destination.  We
can represent the operation without overlap and choose based on
the operands seen.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-04-19 20:42:58 +00:00
parent ebcfb91abe
commit a9e434a5dc
2 changed files with 24 additions and 2 deletions
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2
tcg/aarch64/tcg-target.h
View File

@ -140,7 +140,7 @@ typedef enum {
#define TCG_TARGET_HAS_mul_vec 1
#define TCG_TARGET_HAS_sat_vec 1
#define TCG_TARGET_HAS_minmax_vec 1
#define TCG_TARGET_HAS_bitsel_vec 0
#define TCG_TARGET_HAS_bitsel_vec 1
#define TCG_TARGET_HAS_cmpsel_vec 0
#define TCG_TARGET_DEFAULT_MO (0)

24
tcg/aarch64/tcg-target.inc.c
View File

@ -523,6 +523,9 @@ typedef enum {
I3616_ADD = 0x0e208400,
I3616_AND = 0x0e201c00,
I3616_BIC = 0x0e601c00,
I3616_BIF = 0x2ee01c00,
I3616_BIT = 0x2ea01c00,
I3616_BSL = 0x2e601c00,
I3616_EOR = 0x2e201c00,
I3616_MUL = 0x0e209c00,
I3616_ORR = 0x0ea01c00,
@ -2181,7 +2184,7 @@ static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc,
TCGType type = vecl + TCG_TYPE_V64;
unsigned is_q = vecl;
TCGArg a0, a1, a2;
TCGArg a0, a1, a2, a3;
a0 = args[0];
a1 = args[1];
@ -2304,6 +2307,20 @@ static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc,
}
break;
case INDEX_op_bitsel_vec:
a3 = args[3];
if (a0 == a3) {
tcg_out_insn(s, 3616, BIT, is_q, 0, a0, a2, a1);
} else if (a0 == a2) {
tcg_out_insn(s, 3616, BIF, is_q, 0, a0, a3, a1);
} else {
if (a0 != a1) {
tcg_out_mov(s, type, a0, a1);
}
tcg_out_insn(s, 3616, BSL, is_q, 0, a0, a2, a3);
}
break;
case INDEX_op_mov_vec: /* Always emitted via tcg_out_mov. */
case INDEX_op_dupi_vec: /* Always emitted via tcg_out_movi. */
case INDEX_op_dup_vec: /* Always emitted via tcg_out_dup_vec. */
@ -2334,6 +2351,7 @@ int tcg_can_emit_vec_op(TCGOpcode opc, TCGType type, unsigned vece)
case INDEX_op_usadd_vec:
case INDEX_op_ussub_vec:
case INDEX_op_shlv_vec:
case INDEX_op_bitsel_vec:
return 1;
case INDEX_op_shrv_vec:
case INDEX_op_sarv_vec:
@ -2408,6 +2426,8 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
= { .args_ct_str = { "r", "r", "rA", "rZ", "rZ" } };
static const TCGTargetOpDef add2
= { .args_ct_str = { "r", "r", "rZ", "rZ", "rA", "rMZ" } };
static const TCGTargetOpDef w_w_w_w
= { .args_ct_str = { "w", "w", "w", "w" } };
switch (op) {
case INDEX_op_goto_ptr:
@ -2580,6 +2600,8 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
return &w_wr;
case INDEX_op_cmp_vec:
return &w_w_wZ;
case INDEX_op_bitsel_vec:
return &w_w_w_w;
default:
return NULL;