From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52814) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WsAZ9-0007r2-Rt for qemu-devel@nongnu.org; Wed, 04 Jun 2014 08:45:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WsAYw-0008Hb-Um for qemu-devel@nongnu.org; Wed, 04 Jun 2014 08:45:15 -0400 From: Alexander Graf Date: Wed, 4 Jun 2014 14:43:34 +0200 Message-Id: <1401885899-16524-34-git-send-email-agraf@suse.de> In-Reply-To: <1401885899-16524-1-git-send-email-agraf@suse.de> References: <1401885899-16524-1-git-send-email-agraf@suse.de> Subject: [Qemu-devel] [PULL 033/118] target-ppc: Introduce DFP Multiply List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-ppc@nongnu.org Cc: Tom Musta , qemu-devel@nongnu.org From: Tom Musta Add emulation of the PowerPC Decimal Floating Point Multiply instructions dmul[q][.] Signed-off-by: Tom Musta Signed-off-by: Alexander Graf --- target-ppc/dfp_helper.c | 23 +++++++++++++++++++++++ target-ppc/helper.h | 2 ++ target-ppc/translate.c | 4 ++++ 3 files changed, 29 insertions(+) diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index d6d0c2d..e6c1098 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -261,6 +261,16 @@ static void dfp_check_for_VXISI_subtract(struct PPC_DFP *dfp) dfp_check_for_VXISI(dfp, 1); } +static void dfp_check_for_VXIMZ(struct PPC_DFP *dfp) +{ + if (dfp->context.status & DEC_Invalid_operation) { + if ((decNumberIsInfinite(&dfp->a) && decNumberIsZero(&dfp->b)) || + (decNumberIsInfinite(&dfp->b) && decNumberIsZero(&dfp->a))) { + dfp_set_FPSCR_flag(dfp, FP_VX | FP_VXIMZ, FP_VE); + } + } +} + #define DFP_HELPER_TAB(op, dnop, postprocs, size) \ void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *a, uint64_t *b) \ { \ @@ -302,3 +312,16 @@ static void SUB_PPs(struct PPC_DFP *dfp) DFP_HELPER_TAB(dsub, decNumberSubtract, SUB_PPs, 64) DFP_HELPER_TAB(dsubq, decNumberSubtract, SUB_PPs, 128) + +static void MUL_PPs(struct PPC_DFP *dfp) +{ + dfp_set_FPRF_from_FRT(dfp); + dfp_check_for_OX(dfp); + dfp_check_for_UX(dfp); + dfp_check_for_XX(dfp); + dfp_check_for_VXSNAN(dfp); + dfp_check_for_VXIMZ(dfp); +} + +DFP_HELPER_TAB(dmul, decNumberMultiply, MUL_PPs, 64) +DFP_HELPER_TAB(dmulq, decNumberMultiply, MUL_PPs, 128) diff --git a/target-ppc/helper.h b/target-ppc/helper.h index d560e53..ac23556 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -620,3 +620,5 @@ DEF_HELPER_4(dadd, void, env, fprp, fprp, fprp) DEF_HELPER_4(daddq, void, env, fprp, fprp, fprp) DEF_HELPER_4(dsub, void, env, fprp, fprp, fprp) DEF_HELPER_4(dsubq, void, env, fprp, fprp, fprp) +DEF_HELPER_4(dmul, void, env, fprp, fprp, fprp) +DEF_HELPER_4(dmulq, void, env, fprp, fprp, fprp) diff --git a/target-ppc/translate.c b/target-ppc/translate.c index d4077c2..e1ab41f 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -8359,6 +8359,8 @@ GEN_DFP_T_A_B_Rc(dadd) GEN_DFP_T_A_B_Rc(daddq) GEN_DFP_T_A_B_Rc(dsub) GEN_DFP_T_A_B_Rc(dsubq) +GEN_DFP_T_A_B_Rc(dmul) +GEN_DFP_T_A_B_Rc(dmulq) /*** SPE extension ***/ /* Register moves */ @@ -11290,6 +11292,8 @@ GEN_DFP_T_A_B_Rc(dadd, 0x02, 0x00), GEN_DFP_Tp_Ap_Bp_Rc(daddq, 0x02, 0x00), GEN_DFP_T_A_B_Rc(dsub, 0x02, 0x10), GEN_DFP_Tp_Ap_Bp_Rc(dsubq, 0x02, 0x10), +GEN_DFP_T_A_B_Rc(dmul, 0x02, 0x01), +GEN_DFP_Tp_Ap_Bp_Rc(dmulq, 0x02, 0x01), #undef GEN_SPE #define GEN_SPE(name0, name1, opc2, opc3, inval0, inval1, type) \ GEN_OPCODE_DUAL(name0##_##name1, 0x04, opc2, opc3, inval0, inval1, type, PPC_NONE) -- 1.8.1.4