From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:43336) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gyIOQ-0000av-BL for qemu-devel@nongnu.org; Mon, 25 Feb 2019 10:42:16 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gyIOP-0008BP-G5 for qemu-devel@nongnu.org; Mon, 25 Feb 2019 10:42:10 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56638) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gyIOP-0008Ag-71 for qemu-devel@nongnu.org; Mon, 25 Feb 2019 10:42:09 -0500 From: David Hildenbrand Date: Mon, 25 Feb 2019 16:42:04 +0100 Message-Id: <20190225154204.26751-1-david@redhat.com> Subject: [Qemu-devel] [PATCH v2] tcg: Implement tcg_gen_shri2_i64() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Richard Henderson , David Hildenbrand Will be helpful for s390x. Input 128 bit and output 64 bit only, which is sufficient for now. Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- v1 -> v2: - Use one output (lower part) only - Shield off big shifts by an assert tcg/tcg-op.c | 15 +++++++++++++++ tcg/tcg-op.h | 1 + 2 files changed, 16 insertions(+) diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index 1bd7ef24af..e4fa75c074 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -2381,6 +2381,21 @@ void tcg_gen_sub2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al, } } +void tcg_gen_shri2_i64(TCGv_i64 ret, TCGv_i64 al, TCGv_i64 ah, int64_t count) +{ + tcg_debug_assert(count >= 0 && count <= 64); + if (count == 0) { + tcg_gen_mov_i64(ret, al); + } else if (count == 64) { + tcg_gen_mov_i64(ret, ah); + } else { + TCGv_i64 t0 = tcg_temp_new_i64(); + tcg_gen_shri_i64(t0, al, count); + tcg_gen_deposit_i64(ret, t0, ah, 64 - count, count); + tcg_temp_free_i64(t0); + } +} + void tcg_gen_mulu2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2) { if (TCG_TARGET_HAS_mulu2_i64) { diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index d3e51b15af..1ffe689276 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -513,6 +513,7 @@ void tcg_gen_add2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al, TCGv_i64 ah, TCGv_i64 bl, TCGv_i64 bh); void tcg_gen_sub2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al, TCGv_i64 ah, TCGv_i64 bl, TCGv_i64 bh); +void tcg_gen_shri2_i64(TCGv_i64 ret, TCGv_i64 al, TCGv_i64 ah, int64_t count); void tcg_gen_mulu2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2); void tcg_gen_muls2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2); void tcg_gen_mulsu2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2); -- 2.17.2