Commit b2e3ae94 authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg: Improve tcg_gen_muli_i32/i64 



Convert multiplication by power of two to left shift.

Reviewed-by: default avatarEmilio G. Cota <cota@braap.org>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: default avatarRichard Henderson <richard.henderson@linaro.org>
parent 56e8698f

tcg/tcg-op.c

+18 −6
Original line number Diff line number Diff line
@@ -277,10 +277,16 @@ void tcg_gen_setcondi_i32(TCGCond cond, TCGv_i32 ret, 


void tcg_gen_muli_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)

{

    if (arg2 == 0) {

        tcg_gen_movi_i32(ret, 0);

    } else if (is_power_of_2(arg2)) {

        tcg_gen_shli_i32(ret, arg1, ctz32(arg2));

    } else {

        TCGv_i32 t0 = tcg_const_i32(arg2);

        tcg_gen_mul_i32(ret, arg1, t0);

        tcg_temp_free_i32(t0);

    }

}



void tcg_gen_div_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)

{
@@ -1430,10 +1436,16 @@ void tcg_gen_setcondi_i64(TCGCond cond, TCGv_i64 ret, 


void tcg_gen_muli_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)

{

    if (arg2 == 0) {

        tcg_gen_movi_i64(ret, 0);

    } else if (is_power_of_2(arg2)) {

        tcg_gen_shli_i64(ret, arg1, ctz64(arg2));

    } else {

        TCGv_i64 t0 = tcg_const_i64(arg2);

        tcg_gen_mul_i64(ret, arg1, t0);

        tcg_temp_free_i64(t0);

    }

}



void tcg_gen_div_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)

{