target/arm: Remove helper_double_saturate

Replace x = double_saturate(y) with x = add_saturate(y, y).
There is no need for a separate more specialized helper.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190807045335.1361-12-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 0 insertions, 15 deletions

diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c
index 5e1625a1c8..0fd4bd0238 100644
--- a/target/arm/op_helper.c
+++ b/target/arm/op_helper.c
@@ -135,21 +135,6 @@ uint32_t HELPER(sub_saturate)(CPUARMState *env, uint32_t a, uint32_t b)
     return res;
 }
 
-uint32_t HELPER(double_saturate)(CPUARMState *env, int32_t val)
-{
-    uint32_t res;
-    if (val >= 0x40000000) {
-        res = ~SIGNBIT;
-        env->QF = 1;
-    } else if (val <= (int32_t)0xc0000000) {
-        res = SIGNBIT;
-        env->QF = 1;
-    } else {
-        res = val << 1;
-    }
-    return res;
-}
-
 uint32_t HELPER(add_usaturate)(CPUARMState *env, uint32_t a, uint32_t b)
 {
     uint32_t res = a + b;