From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36171) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c0Anx-0002HF-DL for qemu-devel@nongnu.org; Fri, 28 Oct 2016 13:18:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c0Anu-0004PB-9J for qemu-devel@nongnu.org; Fri, 28 Oct 2016 13:18:57 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:38704 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1c0Anu-0004Op-3w for qemu-devel@nongnu.org; Fri, 28 Oct 2016 13:18:54 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u9SHIOLm044253 for ; Fri, 28 Oct 2016 13:18:53 -0400 Received: from e24smtp02.br.ibm.com (e24smtp02.br.ibm.com [32.104.18.86]) by mx0b-001b2d01.pphosted.com with ESMTP id 26caejj5ee-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 28 Oct 2016 13:18:53 -0400 Received: from localhost by e24smtp02.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 28 Oct 2016 15:18:51 -0200 From: Jose Ricardo Ziviani Date: Fri, 28 Oct 2016 15:18:03 -0200 In-Reply-To: <1477675084-7713-1-git-send-email-joserz@linux.vnet.ibm.com> References: <1477675084-7713-1-git-send-email-joserz@linux.vnet.ibm.com> Message-Id: <1477675084-7713-4-git-send-email-joserz@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v2 3/4] target-ppc: Implement bcdcfz. 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 bcdcfz. converts from Zoned numeric format to BCD. 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 | 47 +++++++++++++++++++++++++++++++++++++ target-ppc/translate/vmx-impl.inc.c | 7 ++++-- 3 files changed, 53 insertions(+), 2 deletions(-) diff --git a/target-ppc/helper.h b/target-ppc/helper.h index 53d1e7a..a9ac28b 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -373,6 +373,7 @@ DEF_HELPER_4(bcdadd, i32, avr, avr, avr, i32) 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_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 a58ed30..19e6a3a 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -2727,6 +2727,53 @@ uint32_t helper_bcdctn(ppc_avr_t *r, ppc_avr_t *b) return cr; } +uint32_t helper_bcdcfz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps) +{ + int i; + int j; + int cr = 0; + int invalid = 0; + int neq_flag = 0; + int zone_digit = 0; + int zone_lead = (ps) ? 0xF : 0x3; + int digit = 0; + ppc_avr_t ret = { .u64 = { 0, 0 } }; + int sgnb = b->u8[BCD_DIG_BYTE(0)] >> 4; + + if (unlikely((sgnb < 0xA) && ps)) { + invalid = 1; + } + + for (i = 0, j = 1; i < 31; i += 2, j++) { + zone_digit = (i) ? b->u8[BCD_DIG_BYTE(i)] >> 4 : zone_lead; + digit = b->u8[BCD_DIG_BYTE(i)] & 0xF; + + if (unlikely(zone_digit != zone_lead || digit > 0x9)) { + invalid = 1; + break; + } + + neq_flag += (digit != 0); + bcd_put_digit(&ret, digit, j); + } + + if ((ps && (sgnb == 0xB || sgnb == 0xD)) || + (!ps && (sgnb & 0x4))) { + bcd_put_digit(&ret, BCD_NEG_PREF, 0); + cr = (neq_flag) ? 1 << CRF_LT : 1 << CRF_EQ; + } else { + bcd_put_digit(&ret, BCD_PLUS_PREF_1, 0); + cr = (neq_flag) ? 1 << CRF_GT : 1 << CRF_EQ; + } + + 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 e37fc11..6e54437 100644 --- a/target-ppc/translate/vmx-impl.inc.c +++ b/target-ppc/translate/vmx-impl.inc.c @@ -991,6 +991,7 @@ GEN_BCD(bcdadd) GEN_BCD(bcdsub) GEN_BCD2(bcdcfn) GEN_BCD3(bcdctn) +GEN_BCD2(bcdcfz) static void gen_xpnd04_1(DisasContext *ctx) { @@ -1005,7 +1006,8 @@ static void gen_xpnd04_1(DisasContext *ctx) gen_bcdctn(ctx); break; case 6: - break; /* bcdcfz. */ + gen_bcdcfz(ctx); + break; case 7: gen_bcdcfn(ctx); break; @@ -1026,7 +1028,8 @@ static void gen_xpnd04_2(DisasContext *ctx) case 4: break; /* bcdctz. */ case 6: - break; /* bcdcfz. */ + gen_bcdcfz(ctx); + break; case 7: gen_bcdcfn(ctx); break; -- 2.7.4