From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LC36U-00064K-31 for qemu-devel@nongnu.org; Sun, 14 Dec 2008 21:22:38 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LC36T-00063u-Ce for qemu-devel@nongnu.org; Sun, 14 Dec 2008 21:22:37 -0500 Received: from [199.232.76.173] (port=47094 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LC36T-00063n-7m for qemu-devel@nongnu.org; Sun, 14 Dec 2008 21:22:37 -0500 Received: from mx20.gnu.org ([199.232.41.8]:31274) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1LC36S-0001A8-AM for qemu-devel@nongnu.org; Sun, 14 Dec 2008 21:22:37 -0500 Received: from mail.codesourcery.com ([65.74.133.4]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LC36R-0002QS-Dl for qemu-devel@nongnu.org; Sun, 14 Dec 2008 21:22:35 -0500 From: Nathan Froyd Date: Sun, 14 Dec 2008 18:15:07 -0800 Message-Id: <1229307315-16807-35-git-send-email-froydnj@codesourcery.com> In-Reply-To: <1229307315-16807-1-git-send-email-froydnj@codesourcery.com> References: <1229307315-16807-1-git-send-email-froydnj@codesourcery.com> Subject: [Qemu-devel] [PATCH 34/42] target-ppc: 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 57182c6..4069e9d 100644 --- a/target-ppc/op_helper.c +++ b/target-ppc/op_helper.c @@ -2033,6 +2033,33 @@ target_ulong helper_dlmzb (target_ulong high, target_ulong low, uint32_t update_ for (index = N_ELEMS(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