From: Balamuruhan S <bala24@linux.ibm.com>
To: mpe@ellerman.id.au
Cc: ravi.bangoria@linux.ibm.com, Balamuruhan S <bala24@linux.ibm.com>,
paulus@samba.org, sandipan@linux.ibm.com,
naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v3 2/3] powerpc sstep: add support for divde[.] and divdeu[.] instructions
Date: Mon, 20 Jan 2020 12:24:25 +0530 [thread overview]
Message-ID: <20200120065426.3259-3-bala24@linux.ibm.com> (raw)
In-Reply-To: <20200120065426.3259-1-bala24@linux.ibm.com>
This patch adds emulation support for divde, divdeu instructions,
* Divide Doubleword Extended (divde[.])
* Divide Doubleword Extended Unsigned (divdeu[.])
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Balamuruhan S <bala24@linux.ibm.com>
---
arch/powerpc/lib/sstep.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index c077acb983a1..2cac71a71878 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -1736,7 +1736,18 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
op->val = (int) regs->gpr[ra] /
(int) regs->gpr[rb];
goto arith_done;
-
+#ifdef __powerpc64__
+ case 425: /* divde[.] */
+ asm volatile(PPC_DIVDE(%0, %1, %2) :
+ "=r" (op->val) : "r" (regs->gpr[ra]),
+ "r" (regs->gpr[rb]));
+ goto arith_done;
+ case 393: /* divdeu[.] */
+ asm volatile(PPC_DIVDEU(%0, %1, %2) :
+ "=r" (op->val) : "r" (regs->gpr[ra]),
+ "r" (regs->gpr[rb]));
+ goto arith_done;
+#endif
case 755: /* darn */
if (!cpu_has_feature(CPU_FTR_ARCH_300))
return -1;
--
2.14.5
next prev parent reply other threads:[~2020-01-20 7:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 6:54 [PATCH v3 0/3] Add support for divde[.] and divdeu[.] instruction emulation Balamuruhan S
2020-01-20 6:54 ` [PATCH v3 1/3] powerpc ppc-opcode: add divde and divdeu opcodes Balamuruhan S
2020-01-20 6:54 ` Balamuruhan S [this message]
2020-01-20 6:54 ` [PATCH v3 3/3] powerpc test_emulate_step: add testcases for divde[.] and divdeu[.] instructions Balamuruhan S
2020-04-01 10:56 ` Naveen N. Rao
2020-04-01 11:21 ` Balamuruhan S
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