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target/arm: Convert Neon 2-reg-misc VRINT insns to decodetree

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Convert the Neon 2-reg-misc VRINT insns to decodetree.
Giving these insns their own do_vrint() function allows us
to change the rounding mode just once at the start and end
rather than doing it for every element in the vector.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200616170844.13318-18-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2020-06-16 18:08:40 +01:00
parent baa59323e8
commit 128123ea34
3 changed files with 74 additions and 26 deletions
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31
target/arm/translate.c
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@ -4959,6 +4959,11 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
case NEON_2RM_VCEQ0_F:
case NEON_2RM_VCLE0_F:
case NEON_2RM_VCLT0_F:
case NEON_2RM_VRINTN:
case NEON_2RM_VRINTA:
case NEON_2RM_VRINTM:
case NEON_2RM_VRINTP:
case NEON_2RM_VRINTZ:
/* handled by decodetree */
return 1;
case NEON_2RM_VTRN:
@ -4993,32 +4998,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
}
neon_store_reg(rm, pass, tmp2);
break;
case NEON_2RM_VRINTN:
case NEON_2RM_VRINTA:
case NEON_2RM_VRINTM:
case NEON_2RM_VRINTP:
case NEON_2RM_VRINTZ:
{
TCGv_i32 tcg_rmode;
TCGv_ptr fpstatus = get_fpstatus_ptr(1);
int rmode;
if (op == NEON_2RM_VRINTZ) {
rmode = FPROUNDING_ZERO;
} else {
rmode = fp_decode_rm[((op & 0x6) >> 1) ^ 1];
}
tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode));
gen_helper_set_neon_rmode(tcg_rmode, tcg_rmode,
cpu_env);
gen_helper_rints(tmp, tmp, fpstatus);
gen_helper_set_neon_rmode(tcg_rmode, tcg_rmode,
cpu_env);
tcg_temp_free_ptr(fpstatus);
tcg_temp_free_i32(tcg_rmode);
break;
}
case NEON_2RM_VCVTAU:
case NEON_2RM_VCVTAS:
case NEON_2RM_VCVTNU: