[Qemu-devel] [PATCH v3 2/5] target-ppc: improve lxvw4x implementation

[Nikunj A Dadhania]

Load 8byte at a time and manipulate.

Signed-off-by: Nikunj A Dadhania <address@hidden>
---
 target-ppc/helper.h                 |  1 +
 target-ppc/mem_helper.c             |  5 +++++
 target-ppc/translate/vsx-impl.inc.c | 19 +++++--------------
 3 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 966f2ce..9f6705d 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -297,6 +297,7 @@ DEF_HELPER_2(mtvscr, void, env, avr)
 DEF_HELPER_3(lvebx, void, env, avr, tl)
 DEF_HELPER_3(lvehx, void, env, avr, tl)
 DEF_HELPER_3(lvewx, void, env, avr, tl)
+DEF_HELPER_1(deposit32x2, i64, i64)
 DEF_HELPER_3(stvebx, void, env, avr, tl)
 DEF_HELPER_3(stvehx, void, env, avr, tl)
 DEF_HELPER_3(stvewx, void, env, avr, tl)
diff --git a/target-ppc/mem_helper.c b/target-ppc/mem_helper.c
index 6548715..86e493e 100644
--- a/target-ppc/mem_helper.c
+++ b/target-ppc/mem_helper.c
@@ -285,6 +285,11 @@ STVE(stvewx, cpu_stl_data_ra, bswap32, u32)
 #undef I
 #undef LVE
 
+uint64_t helper_deposit32x2(uint64_t x)
+{
+    return deposit64((x >> 32), 32, 32, (x));
+}
+
 #undef HI_IDX
 #undef LO_IDX
 
diff --git a/target-ppc/translate/vsx-impl.inc.c 
b/target-ppc/translate/vsx-impl.inc.c
index eee6052..df278df 100644
--- a/target-ppc/translate/vsx-impl.inc.c
+++ b/target-ppc/translate/vsx-impl.inc.c
@@ -75,7 +75,6 @@ static void gen_lxvdsx(DisasContext *ctx)
 static void gen_lxvw4x(DisasContext *ctx)
 {
     TCGv EA;
-    TCGv_i64 tmp;
     TCGv_i64 xth = cpu_vsrh(xT(ctx->opcode));
     TCGv_i64 xtl = cpu_vsrl(xT(ctx->opcode));
     if (unlikely(!ctx->vsx_enabled)) {
@@ -84,22 +83,14 @@ static void gen_lxvw4x(DisasContext *ctx)
     }
     gen_set_access_type(ctx, ACCESS_INT);
     EA = tcg_temp_new();
-    tmp = tcg_temp_new_i64();
 
     gen_addr_reg_index(ctx, EA);
-    gen_qemu_ld32u_i64(ctx, tmp, EA);
-    tcg_gen_addi_tl(EA, EA, 4);
-    gen_qemu_ld32u_i64(ctx, xth, EA);
-    tcg_gen_deposit_i64(xth, xth, tmp, 32, 32);
-
-    tcg_gen_addi_tl(EA, EA, 4);
-    gen_qemu_ld32u_i64(ctx, tmp, EA);
-    tcg_gen_addi_tl(EA, EA, 4);
-    gen_qemu_ld32u_i64(ctx, xtl, EA);
-    tcg_gen_deposit_i64(xtl, xtl, tmp, 32, 32);
-
+    tcg_gen_qemu_ld_i64(xth, EA, ctx->mem_idx, MO_LEQ);
+    gen_helper_deposit32x2(xth, xth);
+    tcg_gen_addi_tl(EA, EA, 8);
+    tcg_gen_qemu_ld_i64(xtl, EA, ctx->mem_idx, MO_LEQ);
+    gen_helper_deposit32x2(xtl, xtl);
     tcg_temp_free(EA);
-    tcg_temp_free_i64(tmp);
 }
 
 #define VSX_STORE_SCALAR(name, operation)                     \
-- 
2.7.4