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tcg-ppc64: Implement bswap64

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Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2013-01-30 21:41:54 -08:00
parent 5d22158200
commit 68aebd45b1
2 changed files with 36 additions and 1 deletions
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35
tcg/ppc64/tcg-target.c
View File

@ -1714,6 +1714,40 @@ static void tcg_out_op (TCGContext *s, TCGOpcode opc, const TCGArg *args,
}
break;
case INDEX_op_bswap64_i64:
a0 = args[0], a1 = args[1], a2 = 0;
if (a0 == a1) {
a0 = 0;
a2 = a1;
}
/* a1 = # abcd efgh */
/* a0 = rl32(a1, 8) # 0000 fghe */
tcg_out_rlw(s, RLWINM, a0, a1, 8, 0, 31);
/* a0 = dep(a0, rl32(a1, 24), 0xff000000) # 0000 hghe */
tcg_out_rlw(s, RLWIMI, a0, a1, 24, 0, 7);
/* a0 = dep(a0, rl32(a1, 24), 0x0000ff00) # 0000 hgfe */
tcg_out_rlw(s, RLWIMI, a0, a1, 24, 16, 23);
/* a0 = rl64(a0, 32) # hgfe 0000 */
/* a2 = rl64(a1, 32) # efgh abcd */
tcg_out_rld(s, RLDICL, a0, a0, 32, 0);
tcg_out_rld(s, RLDICL, a2, a1, 32, 0);
/* a0 = dep(a0, rl32(a2, 8), 0xffffffff) # hgfe bcda */
tcg_out_rlw(s, RLWIMI, a0, a2, 8, 0, 31);
/* a0 = dep(a0, rl32(a2, 24), 0xff000000) # hgfe dcda */
tcg_out_rlw(s, RLWIMI, a0, a2, 24, 0, 7);
/* a0 = dep(a0, rl32(a2, 24), 0x0000ff00) # hgfe dcba */
tcg_out_rlw(s, RLWIMI, a0, a2, 24, 16, 23);
if (a0 == 0) {
tcg_out_mov(s, TCG_TYPE_I64, args[0], a0);
/* Revert the source rotate that we performed above. */
tcg_out_rld(s, RLDICL, a1, a1, 32, 0);
}
break;
default:
tcg_dump_ops (s);
tcg_abort ();
@ -1823,6 +1857,7 @@ static const TCGTargetOpDef ppc_op_defs[] = {
{ INDEX_op_bswap16_i64, { "r", "r" } },
{ INDEX_op_bswap32_i32, { "r", "r" } },
{ INDEX_op_bswap32_i64, { "r", "r" } },
{ INDEX_op_bswap64_i64, { "r", "r" } },
{ -1 },
};

2
tcg/ppc64/tcg-target.h
View File

@ -102,7 +102,7 @@ typedef enum {
#define TCG_TARGET_HAS_ext32s_i64 1
#define TCG_TARGET_HAS_bswap16_i64 1
#define TCG_TARGET_HAS_bswap32_i64 1
#define TCG_TARGET_HAS_bswap64_i64 0
#define TCG_TARGET_HAS_bswap64_i64 1
#define TCG_TARGET_HAS_not_i64 1
#define TCG_TARGET_HAS_neg_i64 1
#define TCG_TARGET_HAS_andc_i64 0