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target-arm: Implement abs_i32 inline rather than as a helper 

Implement abs_i32 inline (with movcond) rather than using a helper
function.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
master
Peter Maydell 2012-10-18 17:40:41 +01:00
parent ee6fa5593e
commit 36c91fd115
3 changed files with 9 additions and 8 deletions
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5
target-arm/helper.c
View File

@ -1562,11 +1562,6 @@ uint32_t HELPER(rbit)(uint32_t x)
return x;
}
uint32_t HELPER(abs)(uint32_t x)
{
return ((int32_t)x < 0) ? -x : x;
}
#if defined(CONFIG_USER_ONLY)
void do_interrupt (CPUARMState *env)

1
target-arm/helper.h
View File

@ -13,7 +13,6 @@ DEF_HELPER_2(double_saturate, i32, env, s32)
DEF_HELPER_FLAGS_2(sdiv, TCG_CALL_CONST | TCG_CALL_PURE, s32, s32, s32)
DEF_HELPER_FLAGS_2(udiv, TCG_CALL_CONST | TCG_CALL_PURE, i32, i32, i32)
DEF_HELPER_FLAGS_1(rbit, TCG_CALL_CONST | TCG_CALL_PURE, i32, i32)
DEF_HELPER_FLAGS_1(abs, TCG_CALL_CONST | TCG_CALL_PURE, i32, i32)
#define PAS_OP(pfx) \
DEF_HELPER_3(pfx ## add8, i32, i32, i32, ptr) \

11
target-arm/translate.c
View File

@ -462,8 +462,15 @@ static void gen_sar(TCGv dest, TCGv t0, TCGv t1)
tcg_temp_free_i32(tmp1);
}
/* FIXME: Implement this natively. */
#define tcg_gen_abs_i32(t0, t1) gen_helper_abs(t0, t1)
static void tcg_gen_abs_i32(TCGv dest, TCGv src)
{
TCGv c0 = tcg_const_i32(0);
TCGv tmp = tcg_temp_new_i32();
tcg_gen_neg_i32(tmp, src);
tcg_gen_movcond_i32(TCG_COND_GT, dest, src, c0, src, tmp);
tcg_temp_free_i32(c0);
tcg_temp_free_i32(tmp);
}
static void shifter_out_im(TCGv var, int shift)
{