[PATCH v2 10/30] Hexagon HVX (target/hexagon) instruction utility functions

[Taylor Simpson]

Functions to support scatter/gather
Add new file to target/hexagon/meson.build

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
---
 target/hexagon/mmvec/system_ext_mmvec.h | 29 +++++++++++++
 target/hexagon/mmvec/system_ext_mmvec.c | 74 +++++++++++++++++++++++++++++++++
 target/hexagon/meson.build              |  1 +
 3 files changed, 104 insertions(+)
 create mode 100644 target/hexagon/mmvec/system_ext_mmvec.h
 create mode 100644 target/hexagon/mmvec/system_ext_mmvec.c

diff --git a/target/hexagon/mmvec/system_ext_mmvec.h 
b/target/hexagon/mmvec/system_ext_mmvec.h
new file mode 100644
index 0000000..bc6ab4a
--- /dev/null
+++ b/target/hexagon/mmvec/system_ext_mmvec.h
@@ -0,0 +1,29 @@
+/*
+ *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights 
Reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef HEXAGON_SYSTEM_EXT_MMVEC_H
+#define HEXAGON_SYSTEM_EXT_MMVEC_H
+
+void mem_gather_store(CPUHexagonState *env, target_ulong vaddr, int slot);
+void mem_vector_scatter_init(CPUHexagonState *env, int slot,
+                             target_ulong base_vaddr, int length,
+                             int element_size);
+void mem_vector_gather_init(CPUHexagonState *env, int slot,
+                            target_ulong base_vaddr, int length,
+                            int element_size);
+
+#endif
diff --git a/target/hexagon/mmvec/system_ext_mmvec.c 
b/target/hexagon/mmvec/system_ext_mmvec.c
new file mode 100644
index 0000000..44def07
--- /dev/null
+++ b/target/hexagon/mmvec/system_ext_mmvec.c
@@ -0,0 +1,74 @@
+/*
+ *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights 
Reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "mmvec/system_ext_mmvec.h"
+
+void mem_gather_store(CPUHexagonState *env, target_ulong vaddr, int slot)
+{
+    size_t size = sizeof(MMVector);
+
+    env->VRegs_updated_tmp = 0;
+
+    env->vstore_pending[slot] = 1;
+    env->vstore[slot].va   = vaddr;
+    env->vstore[slot].size = size;
+    memcpy(&env->vstore[slot].data.ub[0], &env->tmp_VRegs[0], size);
+
+    /* On a gather store, overwrite the store mask to emulate dropped gathers 
*/
+    bitmap_copy(env->vstore[slot].mask, env->vtcm_log.mask, size);
+}
+
+void mem_vector_scatter_init(CPUHexagonState *env, int slot,
+                             target_ulong base_vaddr,
+                             int length, int element_size)
+{
+    int i;
+
+    for (i = 0; i < sizeof(MMVector); i++) {
+        env->vtcm_log.data.ub[i] = 0;
+    }
+    bitmap_zero(env->vtcm_log.mask, MAX_VEC_SIZE_BYTES);
+
+    env->vtcm_pending = true;
+    env->vtcm_log.op = false;
+    env->vtcm_log.op_size = 0;
+    env->vtcm_log.size = sizeof(MMVector);
+}
+
+void mem_vector_gather_init(CPUHexagonState *env, int slot,
+                            target_ulong base_vaddr,
+                            int length, int element_size)
+{
+    int i;
+
+    for (i = 0; i < sizeof(MMVector); i++) {
+        env->vtcm_log.data.ub[i] = 0;
+        env->vtcm_log.va[i] = 0;
+        env->tmp_VRegs[0].ub[i] = 0;
+    }
+    bitmap_zero(env->vtcm_log.mask, MAX_VEC_SIZE_BYTES / 8);
+    env->vtcm_log.op = false;
+    env->vtcm_log.op_size = 0;
+
+    /*
+     * Temp reg gets updated
+     * This allows store .new to grab the correct result
+     */
+    env->VRegs_updated_tmp = 1;
+}
diff --git a/target/hexagon/meson.build b/target/hexagon/meson.build
index 6fd9360..ed292b4 100644
--- a/target/hexagon/meson.build
+++ b/target/hexagon/meson.build
@@ -173,6 +173,7 @@ hexagon_ss.add(files(
     'printinsn.c',
     'arch.c',
     'fma_emu.c',
+    'mmvec/system_ext_mmvec.c',
 ))
 
 target_arch += {'hexagon': hexagon_ss}
-- 
2.7.4