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>
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@ -6,7 +6,6 @@ DEF_HELPER_3(add_saturate, i32, env, i32, i32)
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DEF_HELPER_3(sub_saturate, i32, env, i32, i32)
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DEF_HELPER_3(add_usaturate, i32, env, i32, i32)
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DEF_HELPER_3(sub_usaturate, i32, env, i32, i32)
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DEF_HELPER_2(double_saturate, i32, env, s32)
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DEF_HELPER_FLAGS_2(sdiv, TCG_CALL_NO_RWG_SE, s32, s32, s32)
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DEF_HELPER_FLAGS_2(udiv, TCG_CALL_NO_RWG_SE, i32, i32, i32)
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DEF_HELPER_FLAGS_1(rbit, TCG_CALL_NO_RWG_SE, i32, i32)
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@ -135,21 +135,6 @@ uint32_t HELPER(sub_saturate)(CPUARMState *env, uint32_t a, uint32_t b)
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return res;
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}
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uint32_t HELPER(double_saturate)(CPUARMState *env, int32_t val)
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{
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uint32_t res;
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if (val >= 0x40000000) {
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res = ~SIGNBIT;
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env->QF = 1;
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} else if (val <= (int32_t)0xc0000000) {
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res = SIGNBIT;
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env->QF = 1;
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} else {
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res = val << 1;
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}
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return res;
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}
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uint32_t HELPER(add_usaturate)(CPUARMState *env, uint32_t a, uint32_t b)
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{
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uint32_t res = a + b;
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@ -8107,7 +8107,7 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
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tmp = load_reg(s, rm);
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tmp2 = load_reg(s, rn);
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if (op1 & 2)
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gen_helper_double_saturate(tmp2, cpu_env, tmp2);
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gen_helper_add_saturate(tmp2, cpu_env, tmp2, tmp2);
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if (op1 & 1)
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gen_helper_sub_saturate(tmp, cpu_env, tmp, tmp2);
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else
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@ -9950,7 +9950,7 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn)
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tmp = load_reg(s, rn);
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tmp2 = load_reg(s, rm);
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if (op & 1)
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gen_helper_double_saturate(tmp, cpu_env, tmp);
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gen_helper_add_saturate(tmp, cpu_env, tmp, tmp);
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if (op & 2)
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gen_helper_sub_saturate(tmp, cpu_env, tmp2, tmp);
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else
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