From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LHwZo-0006fh-18 for qemu-devel@nongnu.org; Wed, 31 Dec 2008 03:37:16 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LHwZn-0006f3-Bx for qemu-devel@nongnu.org; Wed, 31 Dec 2008 03:37:15 -0500 Received: from [199.232.76.173] (port=42962 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LHwZn-0006er-7X for qemu-devel@nongnu.org; Wed, 31 Dec 2008 03:37:15 -0500 Received: from mx20.gnu.org ([199.232.41.8]:39504) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1LHwZm-0005td-Uq for qemu-devel@nongnu.org; Wed, 31 Dec 2008 03:37:15 -0500 Received: from mail.codesourcery.com ([65.74.133.4]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LHwZi-0001S6-1s for qemu-devel@nongnu.org; Wed, 31 Dec 2008 03:37:10 -0500 From: Nathan Froyd Date: Tue, 30 Dec 2008 19:10:14 -0800 Message-Id: <1230693022-18380-33-git-send-email-froydnj@codesourcery.com> In-Reply-To: <1230693022-18380-1-git-send-email-froydnj@codesourcery.com> References: <1230693022-18380-1-git-send-email-froydnj@codesourcery.com> Subject: [Qemu-devel] [PATCH 32/40] Add saturating arithmetic conversion functions for subsequent instructions. Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Signed-off-by: Nathan Froyd --- target-ppc/op_helper.c | 27 +++++++++++++++++++++++++++ 1 files changed, 27 insertions(+), 0 deletions(-) diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c index 7170d05..09e1368 100644 --- a/target-ppc/op_helper.c +++ b/target-ppc/op_helper.c @@ -1972,6 +1972,33 @@ target_ulong helper_dlmzb (target_ulong high, target_ulong low, uint32_t update_ for (index = ARRAY_SIZE(r->element)-1; index >= 0; index--) #endif +/* Saturating arithmetic helpers. */ +#define SATCVT(from, to, from_type, to_type, min, max, use_min, use_max) \ + static always_inline to_type cvt##from##to (from_type x, int *sat) \ + { \ + to_type r; \ + if (use_min && x < min) { \ + r = min; \ + *sat = 1; \ + } else if (use_max && x > max) { \ + r = max; \ + *sat = 1; \ + } else { \ + r = x; \ + } \ + return r; \ + } +SATCVT(sh, sb, int16_t, int8_t, INT8_MIN, INT8_MAX, 1, 1) +SATCVT(sw, sh, int32_t, int16_t, INT16_MIN, INT16_MAX, 1, 1) +SATCVT(sd, sw, int64_t, int32_t, INT32_MIN, INT32_MAX, 1, 1) +SATCVT(uh, ub, uint16_t, uint8_t, 0, UINT8_MAX, 0, 1) +SATCVT(uw, uh, uint32_t, uint16_t, 0, UINT16_MAX, 0, 1) +SATCVT(ud, uw, uint64_t, uint32_t, 0, UINT32_MAX, 0, 1) +SATCVT(sh, ub, int16_t, uint8_t, 0, UINT8_MAX, 1, 1) +SATCVT(sw, uh, int32_t, uint16_t, 0, UINT16_MAX, 1, 1) +SATCVT(sd, uw, int64_t, uint32_t, 0, UINT32_MAX, 1, 1) +#undef SATCVT + void helper_lvsl (ppc_avr_t *r, target_ulong sh) { int i, j = (sh & 0xf); -- 1.6.0.5