From 17dd65b771d2c9b32ec01eab3626113e52c5d698 Mon Sep 17 00:00:00 2001
From: Aleksandar Markovic <amarkovic@wavecomp.com>
Date: Sun, 30 Jun 2019 19:52:12 -0400
Subject: [PATCH] target/mips: Fix emulation of ILVEV.<B|H|W> on big endian
 host

Fix emulation of ILVEV.<B|H|W> on big endian host by applying
mapping of data element indexes from one endian to another.

Backports commit 98880cb5a669a35b5bc75432027f2b9fff566aea from qemu
---
 qemu/target/mips/msa_helper.c | 37 +++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/qemu/target/mips/msa_helper.c b/qemu/target/mips/msa_helper.c
index 0b6f1b14..8eeea0f5 100644
--- a/qemu/target/mips/msa_helper.c
+++ b/qemu/target/mips/msa_helper.c
@@ -1737,6 +1737,24 @@ void helper_msa_ilvev_df(CPUMIPSState *env, uint32_t df, uint32_t wd,
 
     switch (df) {
     case DF_BYTE:
+#if defined(TARGET_WORDS_BIGENDIAN)
+        pwd->b[8]  = pws->b[9];
+        pwd->b[9]  = pwt->b[9];
+        pwd->b[10] = pws->b[11];
+        pwd->b[11] = pwt->b[11];
+        pwd->b[12] = pws->b[13];
+        pwd->b[13] = pwt->b[13];
+        pwd->b[14] = pws->b[15];
+        pwd->b[15] = pwt->b[15];
+        pwd->b[0]  = pws->b[1];
+        pwd->b[1]  = pwt->b[1];
+        pwd->b[2]  = pws->b[3];
+        pwd->b[3]  = pwt->b[3];
+        pwd->b[4]  = pws->b[5];
+        pwd->b[5]  = pwt->b[5];
+        pwd->b[6]  = pws->b[7];
+        pwd->b[7]  = pwt->b[7];
+#else
         pwd->b[15] = pws->b[14];
         pwd->b[14] = pwt->b[14];
         pwd->b[13] = pws->b[12];
@@ -1753,8 +1771,19 @@ void helper_msa_ilvev_df(CPUMIPSState *env, uint32_t df, uint32_t wd,
         pwd->b[2]  = pwt->b[2];
         pwd->b[1]  = pws->b[0];
         pwd->b[0]  = pwt->b[0];
+#endif
         break;
     case DF_HALF:
+#if defined(TARGET_WORDS_BIGENDIAN)
+        pwd->h[4] = pws->h[5];
+        pwd->h[5] = pwt->h[5];
+        pwd->h[6] = pws->h[7];
+        pwd->h[7] = pwt->h[7];
+        pwd->h[0] = pws->h[1];
+        pwd->h[1] = pwt->h[1];
+        pwd->h[2] = pws->h[3];
+        pwd->h[3] = pwt->h[3];
+#else
         pwd->h[7] = pws->h[6];
         pwd->h[6] = pwt->h[6];
         pwd->h[5] = pws->h[4];
@@ -1763,12 +1792,20 @@ void helper_msa_ilvev_df(CPUMIPSState *env, uint32_t df, uint32_t wd,
         pwd->h[2] = pwt->h[2];
         pwd->h[1] = pws->h[0];
         pwd->h[0] = pwt->h[0];
+#endif
         break;
     case DF_WORD:
+#if defined(TARGET_WORDS_BIGENDIAN)
+        pwd->w[2] = pws->w[3];
+        pwd->w[3] = pwt->w[3];
+        pwd->w[0] = pws->w[1];
+        pwd->w[1] = pwt->w[1];
+#else
         pwd->w[3] = pws->w[2];
         pwd->w[2] = pwt->w[2];
         pwd->w[1] = pws->w[0];
         pwd->w[0] = pwt->w[0];
+#endif
         break;
     case DF_DOUBLE:
         pwd->d[1] = pws->d[0];