target/arm: Improve REVSH
The new bswap flags can implement the semantics exactly. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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@ -354,9 +354,7 @@ void gen_rev16(TCGv_i32 dest, TCGv_i32 var)
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/* Byteswap low halfword and sign extend. */
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static void gen_revsh(TCGv_i32 dest, TCGv_i32 var)
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{
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tcg_gen_ext16u_i32(var, var);
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tcg_gen_bswap16_i32(var, var, TCG_BSWAP_IZ | TCG_BSWAP_OZ);
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tcg_gen_ext16s_i32(dest, var);
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tcg_gen_bswap16_i32(var, var, TCG_BSWAP_OS);
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}
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/* Dual 16-bit add. Result placed in t0 and t1 is marked as dead.
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