From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46320) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzO74-0008Oi-Ad for qemu-devel@nongnu.org; Wed, 26 Oct 2016 09:19:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bzO73-0002Qn-CX for qemu-devel@nongnu.org; Wed, 26 Oct 2016 09:19:26 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:60944) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1bzO73-0002QM-3K for qemu-devel@nongnu.org; Wed, 26 Oct 2016 09:19:25 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u9QDJ79w054007 for ; Wed, 26 Oct 2016 09:19:24 -0400 Received: from e24smtp02.br.ibm.com (e24smtp02.br.ibm.com [32.104.18.86]) by mx0a-001b2d01.pphosted.com with ESMTP id 26avqqt4mm-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 26 Oct 2016 09:19:24 -0400 Received: from localhost by e24smtp02.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 26 Oct 2016 11:19:20 -0200 From: Jose Ricardo Ziviani Date: Wed, 26 Oct 2016 11:18:58 -0200 In-Reply-To: <1477487938-23921-1-git-send-email-joserz@linux.vnet.ibm.com> References: <1477487938-23921-1-git-send-email-joserz@linux.vnet.ibm.com> Message-Id: <1477487938-23921-5-git-send-email-joserz@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH] 4/4] target-ppc: Implement bcdctz. instruction List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-ppc@nongnu.org Cc: qemu-devel@nongnu.org, david@gibson.dropbear.id.au, nikunj@linux.vnet.ibm.com, bharata@linux.vnet.ibm.com bcdctz. converts from BCD to Zoned numeric format. Zoned format uses a byte to represent a digit where the most significant nibble is 0x3 or 0xf, depending on the preferred signal. Signed-off-by: Jose Ricardo Ziviani --- target-ppc/helper.h | 1 + target-ppc/int_helper.c | 54 +++++++++++++++++++++++++++++++++++++ target-ppc/translate/vmx-impl.inc.c | 7 +++-- 3 files changed, 60 insertions(+), 2 deletions(-) diff --git a/target-ppc/helper.h b/target-ppc/helper.h index f460635..3b928b8 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -372,6 +372,7 @@ DEF_HELPER_4(bcdsub, i32, avr, avr, avr, i32) DEF_HELPER_3(bcdcfn, i32, avr, avr, i32) DEF_HELPER_2(bcdctn, i32, avr, avr) DEF_HELPER_3(bcdcfz, i32, avr, avr, i32) +DEF_HELPER_3(bcdctz, i32, avr, avr, i32) DEF_HELPER_2(xsadddp, void, env, i32) DEF_HELPER_2(xssubdp, void, env, i32) diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c index 8cbbdfc..e0a84bb 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -2768,6 +2768,60 @@ uint32_t helper_bcdcfz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps) *r = ret; return cr; } + +uint32_t helper_bcdctz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps) +{ + int i; + int j; + int cr = 0; + int invalid = 0; + uint8_t digit = 0; + int sgnb = bcd_get_sgn(b); + int zone_lead = (ps) ? 0xF0 : 0x30; + ppc_avr_t ret = { .u64 = { 0, 0 } }; + + int eq_flag = (b->u64[HI_IDX] == 0) && ((b->u64[LO_IDX] >> 4) == 0); + int ox_flag = (b->u64[HI_IDX] != 0); + + for (i = 31, j = 16; i > 1; i -= 2, j--) { + digit = get_nibble(b, j); + ret.u8[BCD_DIG_BYTE(i)] = zone_lead + digit; + + if (unlikely(digit > 9)) { + invalid = 1; + } + } + + if (unlikely(!sgnb)) { + sgnb = (!get_nibble(b, 0)) ? 1 : -1; + } + + if (ps) { + bcd_put_digit(&ret, (sgnb == 1) ? 0xC : 0xD, 1); + } else { + bcd_put_digit(&ret, (sgnb == 1) ? 0x3 : 0x7, 1); + } + bcd_put_digit(&ret, get_nibble(b, 1), 0); + + if (!eq_flag) { + cr = (sgnb == 1) ? 1 << CRF_GT : 1 << CRF_LT; + } else { + cr = 1 << CRF_EQ; + } + + if (ox_flag) { + cr |= 1 << CRF_SO; + } + + if (unlikely(invalid)) { + cr = 1 << CRF_SO; + } + + *r = ret; + + return cr; +} + void helper_vsbox(ppc_avr_t *r, ppc_avr_t *a) { int i; diff --git a/target-ppc/translate/vmx-impl.inc.c b/target-ppc/translate/vmx-impl.inc.c index 9192f8f..62c44f0 100644 --- a/target-ppc/translate/vmx-impl.inc.c +++ b/target-ppc/translate/vmx-impl.inc.c @@ -918,6 +918,7 @@ GEN_BCD(bcdsub) GEN_BCD2(bcdcfn) GEN_BCD3(bcdctn) GEN_BCD2(bcdcfz) +GEN_BCD2(bcdctz) static void gen_xpnd04_1(DisasContext *ctx) { @@ -927,7 +928,8 @@ static void gen_xpnd04_1(DisasContext *ctx) case 2: break; /* bcdcfsq. */ case 4: - break; /* bcdctz. */ + gen_bcdctz(ctx); + break; case 5: gen_bcdctn(ctx); break; @@ -952,7 +954,8 @@ static void gen_xpnd04_2(DisasContext *ctx) case 2: break; /* bcdcfsq. */ case 4: - break; /* bcdctz. */ + gen_bcdctz(ctx); + break; case 6: gen_bcdcfz(ctx); break; -- 2.7.4