diff mbox series

[v4,2/2] lpm: add a scalar version of lookupx4 function

Message ID 20220601111542.401360-2-kda@semihalf.com (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers
Series [v4,1/2] lpm: add const to lpm arg of rte_lpm_lookup |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/github-robot: build success github build: passed
ci/iol-mellanox-Performance success Performance Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-aarch64-unit-testing success Testing PASS
ci/iol-x86_64-compile-testing success Testing PASS
ci/iol-x86_64-unit-testing success Testing PASS
ci/Intel-compilation success Compilation OK
ci/intel-Testing success Testing PASS
ci/iol-aarch64-compile-testing success Testing PASS
ci/iol-abi-testing success Testing PASS

Commit Message

Stanislaw Kardach June 1, 2022, 11:15 a.m. UTC 
  From: Michal Mazurek <maz@semihalf.com>

Add an implementation of the rte_lpm_lookupx4() function for platforms
without support for vector operations.

This will be useful in the upcoming RISC-V port as well as any platform
which may want to start with a basic level of LPM support.

Signed-off-by: Michal Mazurek <maz@semihalf.com>
Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
---
 doc/guides/rel_notes/release_22_07.rst |  5 ++++
 lib/lpm/meson.build                    |  1 +
 lib/lpm/rte_lpm.h                      |  4 ++-
 lib/lpm/rte_lpm_scalar.h               | 37 ++++++++++++++++++++++++++
 4 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 lib/lpm/rte_lpm_scalar.h

Comments

Vladimir Medvedkin June 1, 2022, 11:52 a.m. UTC | #1 
On 01/06/2022 12:15, Stanislaw Kardach wrote:
> From: Michal Mazurek <maz@semihalf.com>
> 
> Add an implementation of the rte_lpm_lookupx4() function for platforms
> without support for vector operations.
> 
> This will be useful in the upcoming RISC-V port as well as any platform
> which may want to start with a basic level of LPM support.
> 
> Signed-off-by: Michal Mazurek <maz@semihalf.com>
> Signed-off-by: Stanislaw Kardach <kda@semihalf.com>

Acked-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
Thomas Monjalon June 3, 2022, 9:23 a.m. UTC | #2 
01/06/2022 13:52, Medvedkin, Vladimir:
> On 01/06/2022 12:15, Stanislaw Kardach wrote:
> > From: Michal Mazurek <maz@semihalf.com>
> > 
> > Add an implementation of the rte_lpm_lookupx4() function for platforms
> > without support for vector operations.
> > 
> > This will be useful in the upcoming RISC-V port as well as any platform
> > which may want to start with a basic level of LPM support.
> > 
> > Signed-off-by: Michal Mazurek <maz@semihalf.com>
> > Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
> 
> Acked-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>

Series applied, thanks.
diff mbox series

Patch

diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
index e49cacecef..0cf3f71269 100644
--- a/doc/guides/rel_notes/release_22_07.rst
+++ b/doc/guides/rel_notes/release_22_07.rst
@@ -104,6 +104,11 @@  New Features
   * ``RTE_EVENT_QUEUE_ATTR_WEIGHT``
   * ``RTE_EVENT_QUEUE_ATTR_AFFINITY``
 
+* **Added scalar version of the LPM library.**
+
+  * Added scalar implementation of ``rte_lpm_lookupx4``. This is a fall-back
+    implementation for platforms that don't support vector operations.
+
 
 Removed Items
 -------------
diff --git a/lib/lpm/meson.build b/lib/lpm/meson.build
index 78d91d3421..6b47361fce 100644
--- a/lib/lpm/meson.build
+++ b/lib/lpm/meson.build
@@ -14,6 +14,7 @@  headers = files('rte_lpm.h', 'rte_lpm6.h')
 indirect_headers += files(
         'rte_lpm_altivec.h',
         'rte_lpm_neon.h',
+        'rte_lpm_scalar.h',
         'rte_lpm_sse.h',
         'rte_lpm_sve.h',
 )
diff --git a/lib/lpm/rte_lpm.h b/lib/lpm/rte_lpm.h
index 1cf863a146..4f38864fde 100644
--- a/lib/lpm/rte_lpm.h
+++ b/lib/lpm/rte_lpm.h
@@ -405,8 +405,10 @@  rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
 #endif
 #elif defined(RTE_ARCH_PPC_64)
 #include "rte_lpm_altivec.h"
-#else
+#elif defined(RTE_ARCH_X86)
 #include "rte_lpm_sse.h"
+#else
+#include "rte_lpm_scalar.h"
 #endif
 
 #ifdef __cplusplus
diff --git a/lib/lpm/rte_lpm_scalar.h b/lib/lpm/rte_lpm_scalar.h
new file mode 100644
index 0000000000..f0d9f37894
--- /dev/null
+++ b/lib/lpm/rte_lpm_scalar.h
@@ -0,0 +1,37 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2022 StarFive
+ * Copyright(c) 2022 SiFive
+ * Copyright(c) 2022 Semihalf
+ */
+
+#ifndef _RTE_LPM_SCALAR_H_
+#define _RTE_LPM_SCALAR_H_
+
+#include <rte_vect.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static inline void
+rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
+		uint32_t defv)
+{
+	uint32_t nh;
+	int ret;
+
+	ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[0], &nh);
+	hop[0] = (ret == 0) ? nh : defv;
+	ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[1], &nh);
+	hop[1] = (ret == 0) ? nh : defv;
+	ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[2], &nh);
+	hop[2] = (ret == 0) ? nh : defv;
+	ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[3], &nh);
+	hop[3] = (ret == 0) ? nh : defv;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_LPM_SCALAR_H_ */