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target/sh4: do not use a helper to implement fneg
There is no need to use a helper to flip one bit, just use a TCG xor instruction instead. Message-Id: <20170702202814.27793-5-aurelien@aurel32.net> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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@ -32,7 +32,6 @@ DEF_HELPER_FLAGS_2(float_DT, TCG_CALL_NO_WG, f64, env, i32)
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DEF_HELPER_FLAGS_4(fmac_FT, TCG_CALL_NO_WG, f32, env, f32, f32, f32)
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DEF_HELPER_FLAGS_3(fmul_FT, TCG_CALL_NO_WG, f32, env, f32, f32)
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DEF_HELPER_FLAGS_3(fmul_DT, TCG_CALL_NO_WG, f64, env, f64, f64)
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DEF_HELPER_FLAGS_1(fneg_T, TCG_CALL_NO_RWG_SE, f32, f32)
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DEF_HELPER_FLAGS_3(fsub_FT, TCG_CALL_NO_WG, f32, env, f32, f32)
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DEF_HELPER_FLAGS_3(fsub_DT, TCG_CALL_NO_WG, f64, env, f64, f64)
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DEF_HELPER_FLAGS_2(fsqrt_FT, TCG_CALL_NO_WG, f32, env, f32)
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@ -384,11 +384,6 @@ float64 helper_fmul_DT(CPUSH4State *env, float64 t0, float64 t1)
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return t0;
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}
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float32 helper_fneg_T(float32 t0)
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{
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return float32_chs(t0);
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}
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float32 helper_fsqrt_FT(CPUSH4State *env, float32 t0)
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{
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set_float_exception_flags(0, &env->fp_status);
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@ -1691,9 +1691,8 @@ static void _decode_opc(DisasContext * ctx)
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return;
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case 0xf04d: /* fneg FRn/DRn - FPSCR: Nothing */
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CHECK_FPU_ENABLED
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{
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gen_helper_fneg_T(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)]);
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}
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tcg_gen_xori_i32(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)],
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0x80000000);
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return;
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case 0xf05d: /* fabs FRn/DRn - FPCSR: Nothing */
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CHECK_FPU_ENABLED
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