target/mips: msa: Split helpers for DIV_<S|U>.<B|H|W|D>

Achieves clearer code and slightly better performance.

Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Message-Id: <1569415572-19635-18-git-send-email-aleksandar.markovic@rt-rk.com>

3 files changed, 190 insertions, 27 deletions

diff --git a/target/mips/helper.h b/target/mips/helper.h
index 29dfcf0..ec4982f 100644
--- a/target/mips/helper.h
+++ b/target/mips/helper.h
@@ -867,6 +867,16 @@ DEF_HELPER_4(msa_clt_u_h, void, env, i32, i32, i32)
 DEF_HELPER_4(msa_clt_u_w, void, env, i32, i32, i32)
 DEF_HELPER_4(msa_clt_u_d, void, env, i32, i32, i32)
 
+DEF_HELPER_4(msa_div_s_b, void, env, i32, i32, i32)
+DEF_HELPER_4(msa_div_s_h, void, env, i32, i32, i32)
+DEF_HELPER_4(msa_div_s_w, void, env, i32, i32, i32)
+DEF_HELPER_4(msa_div_s_d, void, env, i32, i32, i32)
+
+DEF_HELPER_4(msa_div_u_b, void, env, i32, i32, i32)
+DEF_HELPER_4(msa_div_u_h, void, env, i32, i32, i32)
+DEF_HELPER_4(msa_div_u_w, void, env, i32, i32, i32)
+DEF_HELPER_4(msa_div_u_d, void, env, i32, i32, i32)
+
 
 DEF_HELPER_4(msa_andi_b, void, env, i32, i32, i32)
 DEF_HELPER_4(msa_ori_b, void, env, i32, i32, i32)
@@ -929,8 +939,6 @@ DEF_HELPER_5(msa_asub_u_df, void, env, i32, i32, i32, i32)
 DEF_HELPER_5(msa_mulv_df, void, env, i32, i32, i32, i32)
 DEF_HELPER_5(msa_maddv_df, void, env, i32, i32, i32, i32)
 DEF_HELPER_5(msa_msubv_df, void, env, i32, i32, i32, i32)
-DEF_HELPER_5(msa_div_s_df, void, env, i32, i32, i32, i32)
-DEF_HELPER_5(msa_div_u_df, void, env, i32, i32, i32, i32)
 DEF_HELPER_5(msa_mod_s_df, void, env, i32, i32, i32, i32)
 DEF_HELPER_5(msa_mod_u_df, void, env, i32, i32, i32, i32)
 DEF_HELPER_5(msa_dotp_s_df, void, env, i32, i32, i32, i32)
diff --git a/target/mips/msa_helper.c b/target/mips/msa_helper.c
index b658f48..ceccd8f 100644
--- a/target/mips/msa_helper.c
+++ b/target/mips/msa_helper.c
@@ -1525,7 +1525,154 @@ void helper_msa_clt_u_d(CPUMIPSState *env,
  * +---------------+----------------------------------------------------------+
  */
 
-/* TODO: insert Int Divide group helpers here */
+
+static inline int64_t msa_div_s_df(uint32_t df, int64_t arg1, int64_t arg2)
+{
+    if (arg1 == DF_MIN_INT(df) && arg2 == -1) {
+        return DF_MIN_INT(df);
+    }
+    return arg2 ? arg1 / arg2
+                : arg1 >= 0 ? -1 : 1;
+}
+
+void helper_msa_div_s_b(CPUMIPSState *env,
+                        uint32_t wd, uint32_t ws, uint32_t wt)
+{
+    wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
+    wr_t *pws = &(env->active_fpu.fpr[ws].wr);
+    wr_t *pwt = &(env->active_fpu.fpr[wt].wr);
+
+    pwd->b[0]  = msa_div_s_df(DF_BYTE, pws->b[0],  pwt->b[0]);
+    pwd->b[1]  = msa_div_s_df(DF_BYTE, pws->b[1],  pwt->b[1]);
+    pwd->b[2]  = msa_div_s_df(DF_BYTE, pws->b[2],  pwt->b[2]);
+    pwd->b[3]  = msa_div_s_df(DF_BYTE, pws->b[3],  pwt->b[3]);
+    pwd->b[4]  = msa_div_s_df(DF_BYTE, pws->b[4],  pwt->b[4]);
+    pwd->b[5]  = msa_div_s_df(DF_BYTE, pws->b[5],  pwt->b[5]);
+    pwd->b[6]  = msa_div_s_df(DF_BYTE, pws->b[6],  pwt->b[6]);
+    pwd->b[7]  = msa_div_s_df(DF_BYTE, pws->b[7],  pwt->b[7]);
+    pwd->b[8]  = msa_div_s_df(DF_BYTE, pws->b[8],  pwt->b[8]);
+    pwd->b[9]  = msa_div_s_df(DF_BYTE, pws->b[9],  pwt->b[9]);
+    pwd->b[10] = msa_div_s_df(DF_BYTE, pws->b[10], pwt->b[10]);
+    pwd->b[11] = msa_div_s_df(DF_BYTE, pws->b[11], pwt->b[11]);
+    pwd->b[12] = msa_div_s_df(DF_BYTE, pws->b[12], pwt->b[12]);
+    pwd->b[13] = msa_div_s_df(DF_BYTE, pws->b[13], pwt->b[13]);
+    pwd->b[14] = msa_div_s_df(DF_BYTE, pws->b[14], pwt->b[14]);
+    pwd->b[15] = msa_div_s_df(DF_BYTE, pws->b[15], pwt->b[15]);
+}
+
+void helper_msa_div_s_h(CPUMIPSState *env,
+                        uint32_t wd, uint32_t ws, uint32_t wt)
+{
+    wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
+    wr_t *pws = &(env->active_fpu.fpr[ws].wr);
+    wr_t *pwt = &(env->active_fpu.fpr[wt].wr);
+
+    pwd->h[0]  = msa_div_s_df(DF_HALF, pws->h[0],  pwt->h[0]);
+    pwd->h[1]  = msa_div_s_df(DF_HALF, pws->h[1],  pwt->h[1]);
+    pwd->h[2]  = msa_div_s_df(DF_HALF, pws->h[2],  pwt->h[2]);
+    pwd->h[3]  = msa_div_s_df(DF_HALF, pws->h[3],  pwt->h[3]);
+    pwd->h[4]  = msa_div_s_df(DF_HALF, pws->h[4],  pwt->h[4]);
+    pwd->h[5]  = msa_div_s_df(DF_HALF, pws->h[5],  pwt->h[5]);
+    pwd->h[6]  = msa_div_s_df(DF_HALF, pws->h[6],  pwt->h[6]);
+    pwd->h[7]  = msa_div_s_df(DF_HALF, pws->h[7],  pwt->h[7]);
+}
+
+void helper_msa_div_s_w(CPUMIPSState *env,
+                        uint32_t wd, uint32_t ws, uint32_t wt)
+{
+    wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
+    wr_t *pws = &(env->active_fpu.fpr[ws].wr);
+    wr_t *pwt = &(env->active_fpu.fpr[wt].wr);
+
+    pwd->w[0]  = msa_div_s_df(DF_WORD, pws->w[0],  pwt->w[0]);
+    pwd->w[1]  = msa_div_s_df(DF_WORD, pws->w[1],  pwt->w[1]);
+    pwd->w[2]  = msa_div_s_df(DF_WORD, pws->w[2],  pwt->w[2]);
+    pwd->w[3]  = msa_div_s_df(DF_WORD, pws->w[3],  pwt->w[3]);
+}
+
+void helper_msa_div_s_d(CPUMIPSState *env,
+                        uint32_t wd, uint32_t ws, uint32_t wt)
+{
+    wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
+    wr_t *pws = &(env->active_fpu.fpr[ws].wr);
+    wr_t *pwt = &(env->active_fpu.fpr[wt].wr);
+
+    pwd->d[0]  = msa_div_s_df(DF_DOUBLE, pws->d[0],  pwt->d[0]);
+    pwd->d[1]  = msa_div_s_df(DF_DOUBLE, pws->d[1],  pwt->d[1]);
+}
+
+static inline int64_t msa_div_u_df(uint32_t df, int64_t arg1, int64_t arg2)
+{
+    uint64_t u_arg1 = UNSIGNED(arg1, df);
+    uint64_t u_arg2 = UNSIGNED(arg2, df);
+    return arg2 ? u_arg1 / u_arg2 : -1;
+}
+
+void helper_msa_div_u_b(CPUMIPSState *env,
+                        uint32_t wd, uint32_t ws, uint32_t wt)
+{
+    wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
+    wr_t *pws = &(env->active_fpu.fpr[ws].wr);
+    wr_t *pwt = &(env->active_fpu.fpr[wt].wr);
+
+    pwd->b[0]  = msa_div_u_df(DF_BYTE, pws->b[0],  pwt->b[0]);
+    pwd->b[1]  = msa_div_u_df(DF_BYTE, pws->b[1],  pwt->b[1]);
+    pwd->b[2]  = msa_div_u_df(DF_BYTE, pws->b[2],  pwt->b[2]);
+    pwd->b[3]  = msa_div_u_df(DF_BYTE, pws->b[3],  pwt->b[3]);
+    pwd->b[4]  = msa_div_u_df(DF_BYTE, pws->b[4],  pwt->b[4]);
+    pwd->b[5]  = msa_div_u_df(DF_BYTE, pws->b[5],  pwt->b[5]);
+    pwd->b[6]  = msa_div_u_df(DF_BYTE, pws->b[6],  pwt->b[6]);
+    pwd->b[7]  = msa_div_u_df(DF_BYTE, pws->b[7],  pwt->b[7]);
+    pwd->b[8]  = msa_div_u_df(DF_BYTE, pws->b[8],  pwt->b[8]);
+    pwd->b[9]  = msa_div_u_df(DF_BYTE, pws->b[9],  pwt->b[9]);
+    pwd->b[10] = msa_div_u_df(DF_BYTE, pws->b[10], pwt->b[10]);
+    pwd->b[11] = msa_div_u_df(DF_BYTE, pws->b[11], pwt->b[11]);
+    pwd->b[12] = msa_div_u_df(DF_BYTE, pws->b[12], pwt->b[12]);
+    pwd->b[13] = msa_div_u_df(DF_BYTE, pws->b[13], pwt->b[13]);
+    pwd->b[14] = msa_div_u_df(DF_BYTE, pws->b[14], pwt->b[14]);
+    pwd->b[15] = msa_div_u_df(DF_BYTE, pws->b[15], pwt->b[15]);
+}
+
+void helper_msa_div_u_h(CPUMIPSState *env,
+                        uint32_t wd, uint32_t ws, uint32_t wt)
+{
+    wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
+    wr_t *pws = &(env->active_fpu.fpr[ws].wr);
+    wr_t *pwt = &(env->active_fpu.fpr[wt].wr);
+
+    pwd->h[0]  = msa_div_u_df(DF_HALF, pws->h[0],  pwt->h[0]);
+    pwd->h[1]  = msa_div_u_df(DF_HALF, pws->h[1],  pwt->h[1]);
+    pwd->h[2]  = msa_div_u_df(DF_HALF, pws->h[2],  pwt->h[2]);
+    pwd->h[3]  = msa_div_u_df(DF_HALF, pws->h[3],  pwt->h[3]);
+    pwd->h[4]  = msa_div_u_df(DF_HALF, pws->h[4],  pwt->h[4]);
+    pwd->h[5]  = msa_div_u_df(DF_HALF, pws->h[5],  pwt->h[5]);
+    pwd->h[6]  = msa_div_u_df(DF_HALF, pws->h[6],  pwt->h[6]);
+    pwd->h[7]  = msa_div_u_df(DF_HALF, pws->h[7],  pwt->h[7]);
+}
+
+void helper_msa_div_u_w(CPUMIPSState *env,
+                        uint32_t wd, uint32_t ws, uint32_t wt)
+{
+    wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
+    wr_t *pws = &(env->active_fpu.fpr[ws].wr);
+    wr_t *pwt = &(env->active_fpu.fpr[wt].wr);
+
+    pwd->w[0]  = msa_div_u_df(DF_WORD, pws->w[0],  pwt->w[0]);
+    pwd->w[1]  = msa_div_u_df(DF_WORD, pws->w[1],  pwt->w[1]);
+    pwd->w[2]  = msa_div_u_df(DF_WORD, pws->w[2],  pwt->w[2]);
+    pwd->w[3]  = msa_div_u_df(DF_WORD, pws->w[3],  pwt->w[3]);
+}
+
+void helper_msa_div_u_d(CPUMIPSState *env,
+                        uint32_t wd, uint32_t ws, uint32_t wt)
+{
+    wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
+    wr_t *pws = &(env->active_fpu.fpr[ws].wr);
+    wr_t *pwt = &(env->active_fpu.fpr[wt].wr);
+
+    pwd->d[0]  = msa_div_u_df(DF_DOUBLE, pws->d[0],  pwt->d[0]);
+    pwd->d[1]  = msa_div_u_df(DF_DOUBLE, pws->d[1],  pwt->d[1]);
+}
 
 
 /*
@@ -2287,22 +2434,6 @@ static inline int64_t msa_mulv_df(uint32_t df, int64_t arg1, int64_t arg2)
     return arg1 * arg2;
 }
 
-static inline int64_t msa_div_s_df(uint32_t df, int64_t arg1, int64_t arg2)
-{
-    if (arg1 == DF_MIN_INT(df) && arg2 == -1) {
-        return DF_MIN_INT(df);
-    }
-    return arg2 ? arg1 / arg2
-                : arg1 >= 0 ? -1 : 1;
-}
-
-static inline int64_t msa_div_u_df(uint32_t df, int64_t arg1, int64_t arg2)
-{
-    uint64_t u_arg1 = UNSIGNED(arg1, df);
-    uint64_t u_arg2 = UNSIGNED(arg2, df);
-    return arg2 ? u_arg1 / u_arg2 : -1;
-}
-
 static inline int64_t msa_mod_s_df(uint32_t df, int64_t arg1, int64_t arg2)
 {
     if (arg1 == DF_MIN_INT(df) && arg2 == -1) {
@@ -2523,8 +2654,6 @@ MSA_BINOP_DF(subsuu_s)
 MSA_BINOP_DF(asub_s)
 MSA_BINOP_DF(asub_u)
 MSA_BINOP_DF(mulv)
-MSA_BINOP_DF(div_s)
-MSA_BINOP_DF(div_u)
 MSA_BINOP_DF(mod_s)
 MSA_BINOP_DF(mod_u)
 MSA_BINOP_DF(dotp_s)
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 4db87d6..27eca0a 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -28610,6 +28610,38 @@ static void gen_msa_3r(CPUMIPSState *env, DisasContext *ctx)
             break;
         }
         break;
+    case OPC_DIV_S_df:
+        switch (df) {
+        case DF_BYTE:
+            gen_helper_msa_div_s_b(cpu_env, twd, tws, twt);
+            break;
+        case DF_HALF:
+            gen_helper_msa_div_s_h(cpu_env, twd, tws, twt);
+            break;
+        case DF_WORD:
+            gen_helper_msa_div_s_w(cpu_env, twd, tws, twt);
+            break;
+        case DF_DOUBLE:
+            gen_helper_msa_div_s_d(cpu_env, twd, tws, twt);
+            break;
+        }
+        break;
+    case OPC_DIV_U_df:
+        switch (df) {
+        case DF_BYTE:
+            gen_helper_msa_div_u_b(cpu_env, twd, tws, twt);
+            break;
+        case DF_HALF:
+            gen_helper_msa_div_u_h(cpu_env, twd, tws, twt);
+            break;
+        case DF_WORD:
+            gen_helper_msa_div_u_w(cpu_env, twd, tws, twt);
+            break;
+        case DF_DOUBLE:
+            gen_helper_msa_div_u_d(cpu_env, twd, tws, twt);
+            break;
+        }
+        break;
     case OPC_SLL_df:
         gen_helper_msa_sll_df(cpu_env, tdf, twd, tws, twt);
         break;
@@ -28691,9 +28723,6 @@ static void gen_msa_3r(CPUMIPSState *env, DisasContext *ctx)
     case OPC_ASUB_S_df:
         gen_helper_msa_asub_s_df(cpu_env, tdf, twd, tws, twt);
         break;
-    case OPC_DIV_S_df:
-        gen_helper_msa_div_s_df(cpu_env, tdf, twd, tws, twt);
-        break;
     case OPC_ILVL_df:
         gen_helper_msa_ilvl_df(cpu_env, tdf, twd, tws, twt);
         break;
@@ -28703,9 +28732,6 @@ static void gen_msa_3r(CPUMIPSState *env, DisasContext *ctx)
     case OPC_ASUB_U_df:
         gen_helper_msa_asub_u_df(cpu_env, tdf, twd, tws, twt);
         break;
-    case OPC_DIV_U_df:
-        gen_helper_msa_div_u_df(cpu_env, tdf, twd, tws, twt);
-        break;
     case OPC_ILVR_df:
         gen_helper_msa_ilvr_df(cpu_env, tdf, twd, tws, twt);
         break;