From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36205) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c0Ao3-0002Mg-KW for qemu-devel@nongnu.org; Fri, 28 Oct 2016 13:19:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c0Ao1-0004Qw-Lu for qemu-devel@nongnu.org; Fri, 28 Oct 2016 13:19:03 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47326) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1c0Ao1-0004Qm-Dc for qemu-devel@nongnu.org; Fri, 28 Oct 2016 13:19:01 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u9SHISfS031646 for ; Fri, 28 Oct 2016 13:19:00 -0400 Received: from e24smtp03.br.ibm.com (e24smtp03.br.ibm.com [32.104.18.24]) by mx0a-001b2d01.pphosted.com with ESMTP id 26c3arehsf-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 28 Oct 2016 13:19:00 -0400 Received: from localhost by e24smtp03.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 28 Oct 2016 15:18:57 -0200 From: Jose Ricardo Ziviani Date: Fri, 28 Oct 2016 15:18:04 -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: <1477675084-7713-5-git-send-email-joserz@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v2 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 | 51 +++++++++++++++++++++++++++++++++++++ target-ppc/translate/vmx-impl.inc.c | 7 +++-- 3 files changed, 57 insertions(+), 2 deletions(-) diff --git a/target-ppc/helper.h b/target-ppc/helper.h index a9ac28b..489a405 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -374,6 +374,7 @@ 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 19e6a3a..518824e 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -2774,6 +2774,57 @@ uint32_t helper_bcdcfz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps) return cr; } + +uint32_t helper_bcdctz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps) +{ + int i; + int j; + int cr = 0; + uint8_t digit = 0; + int sgnb = bcd_get_sgn(b); + int zone_lead = (ps) ? 0xF0 : 0x30; + int invalid = (sgnb == 0); + 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] >> 4) != 0); + + for (i = 0, j = 1; i < 32; i += 2, j++) { + digit = bcd_get_digit(b, j, &invalid); + + if (unlikely(invalid)) { + break; + } + + ret.u8[BCD_DIG_BYTE(i)] = zone_lead + digit; + } + + 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, b->u8[BCD_DIG_BYTE(0)] >> 4, 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 6e54437..a868740 100644 --- a/target-ppc/translate/vmx-impl.inc.c +++ b/target-ppc/translate/vmx-impl.inc.c @@ -992,6 +992,7 @@ GEN_BCD(bcdsub) GEN_BCD2(bcdcfn) GEN_BCD3(bcdctn) GEN_BCD2(bcdcfz) +GEN_BCD2(bcdctz) static void gen_xpnd04_1(DisasContext *ctx) { @@ -1001,7 +1002,8 @@ 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; @@ -1026,7 +1028,8 @@ 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