From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LJbCY-0001fE-3w for qemu-devel@nongnu.org; Sun, 04 Jan 2009 17:12:06 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LJbCX-0001es-Fq for qemu-devel@nongnu.org; Sun, 04 Jan 2009 17:12:05 -0500 Received: from [199.232.76.173] (port=59165 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LJbCX-0001ek-AP for qemu-devel@nongnu.org; Sun, 04 Jan 2009 17:12:05 -0500 Received: from savannah.gnu.org ([199.232.41.3]:36038 helo=sv.gnu.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1LJbCW-00010j-E1 for qemu-devel@nongnu.org; Sun, 04 Jan 2009 17:12:05 -0500 Received: from cvs.savannah.gnu.org ([199.232.41.69]) by sv.gnu.org with esmtp (Exim 4.63) (envelope-from ) id 1LJbCR-0003XG-OM for qemu-devel@nongnu.org; Sun, 04 Jan 2009 22:11:59 +0000 Received: from aurel32 by cvs.savannah.gnu.org with local (Exim 4.63) (envelope-from ) id 1LJbCR-0003XC-GQ for qemu-devel@nongnu.org; Sun, 04 Jan 2009 22:11:59 +0000 MIME-Version: 1.0 Errors-To: aurel32 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Aurelien Jarno Message-Id: Date: Sun, 04 Jan 2009 22:11:59 +0000 Subject: [Qemu-devel] [6181] 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 Revision: 6181 http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6181 Author: aurel32 Date: 2009-01-04 22:11:59 +0000 (Sun, 04 Jan 2009) Log Message: ----------- Add saturating arithmetic conversion functions for subsequent instructions. Signed-off-by: Nathan Froyd Signed-off-by: Aurelien Jarno Modified Paths: -------------- trunk/target-ppc/op_helper.c Modified: trunk/target-ppc/op_helper.c =================================================================== --- trunk/target-ppc/op_helper.c 2009-01-04 22:11:49 UTC (rev 6180) +++ trunk/target-ppc/op_helper.c 2009-01-04 22:11:59 UTC (rev 6181) @@ -1972,6 +1972,33 @@ 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);