[PATCH v3 16/20] perf arm-spe: Add new function arm_spe_pkt_desc_op_type()

From: Leo Yan <leo.yan@linaro.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Wei Li <liwei391@huawei.com>, James Clark <james.clark@arm.com>,
	Andre Przywara <andre.przywara@arm.com>,
	Al Grant <Al.Grant@arm.com>, Dave Martin <Dave.Martin@arm.com>,
	linux-kernel@vger.kernel.org
Cc: Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v3 16/20] perf arm-spe: Add new function arm_spe_pkt_desc_op_type()
Date: Thu, 22 Oct 2020 15:58:12 +0100	[thread overview]
Message-ID: <20201022145816.14069-17-leo.yan@linaro.org> (raw)
In-Reply-To: <20201022145816.14069-1-leo.yan@linaro.org>

The operation type packet is complex and contains subclass; the parsing
flow causes deep indentation; for more readable, this patch introduces
a new function arm_spe_pkt_desc_op_type() which is used for operation
type parsing.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
 .../arm-spe-decoder/arm-spe-pkt-decoder.c     | 122 ++++++++++--------
 1 file changed, 66 insertions(+), 56 deletions(-)

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
index 2cb019999016..19d05d9734ab 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -336,6 +336,70 @@ static int arm_spe_pkt_desc_event(const struct arm_spe_pkt *packet,
 	return buf_len - blen;
 }
 
+static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
+				    char *buf, size_t buf_len)
+{
+	int ret, idx = packet->index;
+	unsigned long long payload = packet->payload;
+	size_t blen = buf_len;
+
+	switch (idx) {
+	case 0:
+		return arm_spe_pkt_snprintf(&buf, &blen,
+				payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
+	case 1:
+		ret = arm_spe_pkt_snprintf(&buf, &blen,
+					   payload & 0x1 ? "ST" : "LD");
+		if (ret < 0)
+			return ret;
+
+		if (payload & 0x2) {
+			if (payload & 0x4) {
+				ret = arm_spe_pkt_snprintf(&buf, &blen, " AT");
+				if (ret < 0)
+					return ret;
+			}
+			if (payload & 0x8) {
+				ret = arm_spe_pkt_snprintf(&buf, &blen, " EXCL");
+				if (ret < 0)
+					return ret;
+			}
+			if (payload & 0x10) {
+				ret = arm_spe_pkt_snprintf(&buf, &blen, " AR");
+				if (ret < 0)
+					return ret;
+			}
+		} else if (payload & 0x4) {
+			ret = arm_spe_pkt_snprintf(&buf, &blen, " SIMD-FP");
+			if (ret < 0)
+				return ret;
+		}
+
+		return buf_len - blen;
+
+	case 2:
+		ret = arm_spe_pkt_snprintf(&buf, &blen, "B");
+		if (ret < 0)
+			return ret;
+
+		if (payload & 0x1) {
+			ret = arm_spe_pkt_snprintf(&buf, &blen, " COND");
+			if (ret < 0)
+				return ret;
+		}
+		if (payload & 0x2) {
+			ret = arm_spe_pkt_snprintf(&buf, &blen, " IND");
+			if (ret < 0)
+				return ret;
+		}
+
+		return buf_len - blen;
+
+	default:
+		return 0;
+	}
+}
+
 static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
 				 char *buf, size_t buf_len)
 {
@@ -403,7 +467,7 @@ static int arm_spe_pkt_desc_counter(const struct arm_spe_pkt *packet,
 int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
 		     size_t buf_len)
 {
-	int ret, idx = packet->index;
+	int idx = packet->index;
 	unsigned long long payload = packet->payload;
 	const char *name = arm_spe_pkt_name(packet->type);
 	size_t blen = buf_len;
@@ -416,61 +480,7 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
 	case ARM_SPE_EVENTS:
 		return arm_spe_pkt_desc_event(packet, buf, buf_len);
 	case ARM_SPE_OP_TYPE:
-		switch (idx) {
-		case 0:
-			return arm_spe_pkt_snprintf(&buf, &blen,
-					payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
-		case 1:
-			ret = arm_spe_pkt_snprintf(&buf, &blen,
-						   payload & 0x1 ? "ST" : "LD");
-			if (ret < 0)
-				return ret;
-
-			if (payload & 0x2) {
-				if (payload & 0x4) {
-					ret = arm_spe_pkt_snprintf(&buf, &blen, " AT");
-					if (ret < 0)
-						return ret;
-				}
-				if (payload & 0x8) {
-					ret = arm_spe_pkt_snprintf(&buf, &blen, " EXCL");
-					if (ret < 0)
-						return ret;
-				}
-				if (payload & 0x10) {
-					ret = arm_spe_pkt_snprintf(&buf, &blen, " AR");
-					if (ret < 0)
-						return ret;
-				}
-			} else if (payload & 0x4) {
-				ret = arm_spe_pkt_snprintf(&buf, &blen, " SIMD-FP");
-				if (ret < 0)
-					return ret;
-			}
-
-			return buf_len - blen;
-
-		case 2:
-			ret = arm_spe_pkt_snprintf(&buf, &blen, "B");
-			if (ret < 0)
-				return ret;
-
-			if (payload & 0x1) {
-				ret = arm_spe_pkt_snprintf(&buf, &blen, " COND");
-				if (ret < 0)
-					return ret;
-			}
-			if (payload & 0x2) {
-				ret = arm_spe_pkt_snprintf(&buf, &blen, " IND");
-				if (ret < 0)
-					return ret;
-			}
-
-			return buf_len - blen;
-
-		default:
-			return 0;
-		}
+		return arm_spe_pkt_desc_op_type(packet, buf, buf_len);
 	case ARM_SPE_DATA_SOURCE:
 	case ARM_SPE_TIMESTAMP:
 		return arm_spe_pkt_snprintf(&buf, &blen, "%s %lld", name, payload);
-- 
2.17.1

