---

yaml --- r: 81046 b: refs/heads/master c: c1469f1 h: refs/heads/master v: v3
git-mirror · Dec 11, 2007 · 39fba05 · 39fba05
1 parent 8bb1111
commit 39fba05
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Showing 2 changed files with 26 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fd351b89205bc14f79af2e0d69f4198bcea1cf6a
+refs/heads/master: c1469f13de275fc92b051328ea5764a32a5a43c9
diff --git a/trunk/arch/powerpc/kernel/traps.c b/trunk/arch/powerpc/kernel/traps.c
@@ -622,6 +622,9 @@ static void parse_fpe(struct pt_regs *regs)
 #define INST_POPCNTB		0x7c0000f4
 #define INST_POPCNTB_MASK	0xfc0007fe
 
+#define INST_ISEL		0x7c00001e
+#define INST_ISEL_MASK		0xfc00003e
+
 static int emulate_string_inst(struct pt_regs *regs, u32 instword)
 {
 	u8 rT = (instword >> 21) & 0x1f;
@@ -707,6 +710,23 @@ static int emulate_popcntb_inst(struct pt_regs *regs, u32 instword)
 	return 0;
 }
 
+static int emulate_isel(struct pt_regs *regs, u32 instword)
+{
+	u8 rT = (instword >> 21) & 0x1f;
+	u8 rA = (instword >> 16) & 0x1f;
+	u8 rB = (instword >> 11) & 0x1f;
+	u8 BC = (instword >> 6) & 0x1f;
+	u8 bit;
+	unsigned long tmp;
+
+	tmp = (rA == 0) ? 0 : regs->gpr[rA];
+	bit = (regs->ccr >> (31 - BC)) & 0x1;
+
+	regs->gpr[rT] = bit ? tmp : regs->gpr[rB];
+
+	return 0;
+}
+
 static int emulate_instruction(struct pt_regs *regs)
 {
 	u32 instword;
@@ -749,6 +769,11 @@ static int emulate_instruction(struct pt_regs *regs)
 		return emulate_popcntb_inst(regs, instword);
 	}
 
+	/* Emulate isel (Integer Select) instruction */
+	if ((instword & INST_ISEL_MASK) == INST_ISEL) {
+		return emulate_isel(regs, instword);
+	}
+
 	return -EINVAL;
 }