[PATCH v2 3/3] target/ppc : Update VSX storage access insns to use tcg_gen_qemu _ld/st_i128.

[Chinmay Rath <rathc@linux.ibm.com>]

Updated many VSX instructions to use tcg_gen_qemu_ld/st_i128, instead of using
tcg_gen_qemu_ld/st_i64 consecutively.
Introduced functions {get,set}_vsr_full to facilitate the above & for future use.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
---
 target/ppc/translate/vsx-impl.c.inc | 70 +++++++++++++----------------
 1 file changed, 31 insertions(+), 39 deletions(-)

diff --git a/target/ppc/translate/vsx-impl.c.inc b/target/ppc/translate/vsx-impl.c.inc
index 26ebf3fedf..b622831a73 100644
--- a/target/ppc/translate/vsx-impl.c.inc
+++ b/target/ppc/translate/vsx-impl.c.inc
@@ -10,6 +10,16 @@ static inline void set_cpu_vsr(int n, TCGv_i64 src, bool high)
     tcg_gen_st_i64(src, tcg_env, vsr64_offset(n, high));
 }
 
+static inline void get_vsr_full(TCGv_i128 dst, int reg)
+{
+    tcg_gen_ld_i128(dst, tcg_env, vsr_full_offset(reg));
+}
+
+static inline void set_vsr_full(int reg, TCGv_i128 src)
+{
+    tcg_gen_st_i128(src, tcg_env, vsr_full_offset(reg));
+}
+
 static inline TCGv_ptr gen_vsr_ptr(int reg)
 {
     TCGv_ptr r = tcg_temp_new_ptr();
@@ -196,20 +206,17 @@ static bool trans_LXVH8X(DisasContext *ctx, arg_LXVH8X *a)
 static bool trans_LXVB16X(DisasContext *ctx, arg_LXVB16X *a)
 {
     TCGv EA;
-    TCGv_i64 xth, xtl;
+    TCGv_i128 data;
 
     REQUIRE_VSX(ctx);
     REQUIRE_INSNS_FLAGS2(ctx, ISA300);
 
-    xth = tcg_temp_new_i64();
-    xtl = tcg_temp_new_i64();
+    data = tcg_temp_new_i128();
     gen_set_access_type(ctx, ACCESS_INT);
     EA = do_ea_calc(ctx, a->ra, cpu_gpr[a->rb]);
-    tcg_gen_qemu_ld_i64(xth, EA, ctx->mem_idx, MO_BEUQ);
-    tcg_gen_addi_tl(EA, EA, 8);
-    tcg_gen_qemu_ld_i64(xtl, EA, ctx->mem_idx, MO_BEUQ);
-    set_cpu_vsr(a->rt, xth, true);
-    set_cpu_vsr(a->rt, xtl, false);
+    tcg_gen_qemu_ld_i128(data, EA, ctx->mem_idx,
+                         MO_BE | MO_128 | MO_ATOM_IFALIGN_PAIR);
+    set_vsr_full(a->rt, data);
     return true;
 }
 
@@ -385,20 +392,17 @@ static bool trans_STXVH8X(DisasContext *ctx, arg_STXVH8X *a)
 static bool trans_STXVB16X(DisasContext *ctx, arg_STXVB16X *a)
 {
     TCGv EA;
-    TCGv_i64 xsh, xsl;
+    TCGv_i128 data;
 
     REQUIRE_VSX(ctx);
     REQUIRE_INSNS_FLAGS2(ctx, ISA300);
 
-    xsh = tcg_temp_new_i64();
-    xsl = tcg_temp_new_i64();
-    get_cpu_vsr(xsh, a->rt, true);
-    get_cpu_vsr(xsl, a->rt, false);
+    data = tcg_temp_new_i128();
     gen_set_access_type(ctx, ACCESS_INT);
     EA = do_ea_calc(ctx, a->ra, cpu_gpr[a->rb]);
-    tcg_gen_qemu_st_i64(xsh, EA, ctx->mem_idx, MO_BEUQ);
-    tcg_gen_addi_tl(EA, EA, 8);
-    tcg_gen_qemu_st_i64(xsl, EA, ctx->mem_idx, MO_BEUQ);
+    get_vsr_full(data, a->rt);
+    tcg_gen_qemu_st_i128(data, EA, ctx->mem_idx,
+                         MO_BE | MO_128 | MO_ATOM_IFALIGN_PAIR);
     return true;
 }
 
@@ -2175,13 +2179,13 @@ static bool do_lstxv(DisasContext *ctx, int ra, TCGv displ,
                      int rt, bool store, bool paired)
 {
     TCGv ea;
-    TCGv_i64 xt;
+    TCGv_i128 data;
     MemOp mop;
     int rt1, rt2;
 
-    xt = tcg_temp_new_i64();
+    data = tcg_temp_new_i128();
 
-    mop = DEF_MEMOP(MO_UQ);
+    mop = DEF_MEMOP(MO_128 | MO_ATOM_IFALIGN_PAIR);
 
     gen_set_access_type(ctx, ACCESS_INT);
     ea = do_ea_calc(ctx, ra, displ);
@@ -2195,32 +2199,20 @@ static bool do_lstxv(DisasContext *ctx, int ra, TCGv displ,
     }
 
     if (store) {
-        get_cpu_vsr(xt, rt1, !ctx->le_mode);
-        tcg_gen_qemu_st_i64(xt, ea, ctx->mem_idx, mop);
-        gen_addr_add(ctx, ea, ea, 8);
-        get_cpu_vsr(xt, rt1, ctx->le_mode);
-        tcg_gen_qemu_st_i64(xt, ea, ctx->mem_idx, mop);
+        get_vsr_full(data, rt1);
+        tcg_gen_qemu_st_i128(data, ea, ctx->mem_idx, mop);
         if (paired) {
             gen_addr_add(ctx, ea, ea, 8);
-            get_cpu_vsr(xt, rt2, !ctx->le_mode);
-            tcg_gen_qemu_st_i64(xt, ea, ctx->mem_idx, mop);
-            gen_addr_add(ctx, ea, ea, 8);
-            get_cpu_vsr(xt, rt2, ctx->le_mode);
-            tcg_gen_qemu_st_i64(xt, ea, ctx->mem_idx, mop);
+            get_vsr_full(data, rt2);
+            tcg_gen_qemu_st_i128(data, ea, ctx->mem_idx, mop);
         }
     } else {
-        tcg_gen_qemu_ld_i64(xt, ea, ctx->mem_idx, mop);
-        set_cpu_vsr(rt1, xt, !ctx->le_mode);
-        gen_addr_add(ctx, ea, ea, 8);
-        tcg_gen_qemu_ld_i64(xt, ea, ctx->mem_idx, mop);
-        set_cpu_vsr(rt1, xt, ctx->le_mode);
+        tcg_gen_qemu_ld_i128(data, ea, ctx->mem_idx, mop);
+        set_vsr_full(rt1, data);
         if (paired) {
             gen_addr_add(ctx, ea, ea, 8);
-            tcg_gen_qemu_ld_i64(xt, ea, ctx->mem_idx, mop);
-            set_cpu_vsr(rt2, xt, !ctx->le_mode);
-            gen_addr_add(ctx, ea, ea, 8);
-            tcg_gen_qemu_ld_i64(xt, ea, ctx->mem_idx, mop);
-            set_cpu_vsr(rt2, xt, ctx->le_mode);
+            tcg_gen_qemu_ld_i128(data, ea, ctx->mem_idx, mop);
+            set_vsr_full(rt2, data);
         }
     }
     return true;
-- 
2.39.3