diff mbox series

[v2,2/3] powerpc sstep: add support for divde[.] and divdeu[.] instructions

Message ID 20200113054146.10249-3-bala24@linux.ibm.com (mailing list archive)
State Superseded
Headers show
Series Add support for divde[.] and divdeu[.] instruction emulation | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (20862247a368dbb75d6e97d82345999adaacf3cc)
snowpatch_ozlabs/checkpatch warning total: 0 errors, 0 warnings, 7 checks, 19 lines checked
snowpatch_ozlabs/needsstable success Patch has no Fixes tags

Commit Message

Balamuruhan S Jan. 13, 2020, 5:41 a.m. UTC 
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 mbox series

Patch

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;