target/sh4: Simplify 64-bit fp reg-reg move

We do not need to form full 64-bit quantities in order to perform
the move.  This reduces code expansion on 64-bit hosts.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170718200255.31647-18-rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

diff --git a/target/sh4/translate.c b/target/sh4/translate.c
index 7dfe23d..792a468 100644 (file)
--- a/target/sh4/translate.c
+++ b/target/sh4/translate.c
@@ -981,10 +981,10 @@ static void _decode_opc(DisasContext * ctx)
     case 0xf00c: /* fmov {F,D,X}Rm,{F,D,X}Rn - FPSCR: Nothing */
        CHECK_FPU_ENABLED
         if (ctx->tbflags & FPSCR_SZ) {
-           TCGv_i64 fp = tcg_temp_new_i64();
-            gen_load_fpr64(ctx, fp, XHACK(B7_4));
-            gen_store_fpr64(ctx, fp, XHACK(B11_8));
-           tcg_temp_free_i64(fp);
+            int xsrc = XHACK(B7_4);
+            int xdst = XHACK(B11_8);
+            tcg_gen_mov_i32(FREG(xdst), FREG(xsrc));
+            tcg_gen_mov_i32(FREG(xdst + 1), FREG(xsrc + 1));
        } else {
             tcg_gen_mov_i32(FREG(B11_8), FREG(B7_4));
        }