Commit 60d3d0cf authored by Philippe Mathieu-Daudé's avatar Philippe Mathieu-Daudé Committed by Laurent Vivier
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target/m68k: Optimize rotate_x() using extract_i32() 



Optimize rotate_x() using tcg_gen_extract_i32(). We can now free the
'sz' tcg_temp earlier. Since it is allocated with tcg_const_i32(),
free it with tcg_temp_free_i32().

Signed-off-by: default avatarPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Message-Id: <20190310003428.11723-6-f4bug@amsat.org>
Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
parent 44c64e90

target/m68k/translate.c

+2 −3
Original line number Diff line number Diff line
@@ -3693,6 +3693,7 @@ static TCGv rotate_x(TCGv reg, TCGv shift, int left, int size) 
        tcg_gen_sub_i32(shl, shl, shift); /* shl = size + 1 - shift */

        tcg_gen_sub_i32(shx, sz, shift); /* shx = size - shift */

    }

    tcg_temp_free_i32(sz);



    /* reg = (reg << shl) | (reg >> shr) | (x << shx); */
@@ -3708,9 +3709,7 @@ static TCGv rotate_x(TCGv reg, TCGv shift, int left, int size) 
    /* X = (reg >> size) & 1 */



    X = tcg_temp_new();

    tcg_gen_shr_i32(X, reg, sz);

    tcg_gen_andi_i32(X, X, 1);

    tcg_temp_free(sz);

    tcg_gen_extract_i32(X, reg, size, 1);



    return X;

}