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target/arm: Convert Neon 2-reg-scalar VQDMULH, VQRDMULH to decodetree 

Convert the VQDMULH and VQRDMULH insns in the 2-reg-scalar group
to decodetree.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Peter Maydell 2020-06-16 10:32:27 +01:00
parent 85ac9aef9a
commit b2fc7be972
3 changed files with 34 additions and 40 deletions
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3
target/arm/neon-dp.decode
View File

@ -485,5 +485,8 @@ Vimm_1r 1111 001 . 1 . 000 ... .... cmode:4 0 . op:1 1 .... @1reg_imm
VMUL_2sc 1111 001 . 1 . .. .... .... 1000 . 1 . 0 .... @2scalar
VMUL_F_2sc 1111 001 . 1 . .. .... .... 1001 . 1 . 0 .... @2scalar
VQDMULH_2sc 1111 001 . 1 . .. .... .... 1100 . 1 . 0 .... @2scalar
VQRDMULH_2sc 1111 001 . 1 . .. .... .... 1101 . 1 . 0 .... @2scalar
]
}

29
target/arm/translate-neon.inc.c
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@ -2546,3 +2546,32 @@ static bool trans_VMLS_F_2sc(DisasContext *s, arg_2scalar *a)
return do_2scalar(s, a, opfn[a->size], accfn[a->size]);
}
WRAP_ENV_FN(gen_VQDMULH_16, gen_helper_neon_qdmulh_s16)
WRAP_ENV_FN(gen_VQDMULH_32, gen_helper_neon_qdmulh_s32)
WRAP_ENV_FN(gen_VQRDMULH_16, gen_helper_neon_qrdmulh_s16)
WRAP_ENV_FN(gen_VQRDMULH_32, gen_helper_neon_qrdmulh_s32)
static bool trans_VQDMULH_2sc(DisasContext *s, arg_2scalar *a)
{
static NeonGenTwoOpFn * const opfn[] = {
NULL,
gen_VQDMULH_16,
gen_VQDMULH_32,
NULL,
};
return do_2scalar(s, a, opfn[a->size], NULL);
}
static bool trans_VQRDMULH_2sc(DisasContext *s, arg_2scalar *a)
{
static NeonGenTwoOpFn * const opfn[] = {
NULL,
gen_VQRDMULH_16,
gen_VQRDMULH_32,
NULL,
};
return do_2scalar(s, a, opfn[a->size], NULL);
}

42
target/arm/translate.c
View File

@ -2973,19 +2973,6 @@ static void gen_exception_return(DisasContext *s, TCGv_i32 pc)
#define CPU_V001 cpu_V0, cpu_V0, cpu_V1
static TCGv_i32 neon_load_scratch(int scratch)
{
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_ld_i32(tmp, cpu_env, offsetof(CPUARMState, vfp.scratch[scratch]));
return tmp;
}
static void neon_store_scratch(int scratch, TCGv_i32 var)
{
tcg_gen_st_i32(var, cpu_env, offsetof(CPUARMState, vfp.scratch[scratch]));
tcg_temp_free_i32(var);
}
static int gen_neon_unzip(int rd, int rm, int size, int q)
{
TCGv_ptr pd, pm;
@ -5190,35 +5177,10 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
case 1: /* Float VMLA scalar */
case 5: /* Floating point VMLS scalar */
case 9: /* Floating point VMUL scalar */
return 1; /* handled by decodetree */
case 12: /* VQDMULH scalar */
case 13: /* VQRDMULH scalar */
if (u && ((rd | rn) & 1)) {
return 1;
}
tmp = neon_get_scalar(size, rm);
neon_store_scratch(0, tmp);
for (pass = 0; pass < (u ? 4 : 2); pass++) {
tmp = neon_load_scratch(0);
tmp2 = neon_load_reg(rn, pass);
if (op == 12) {
if (size == 1) {
gen_helper_neon_qdmulh_s16(tmp, cpu_env, tmp, tmp2);
} else {
gen_helper_neon_qdmulh_s32(tmp, cpu_env, tmp, tmp2);
}
} else {
if (size == 1) {
gen_helper_neon_qrdmulh_s16(tmp, cpu_env, tmp, tmp2);
} else {
gen_helper_neon_qrdmulh_s32(tmp, cpu_env, tmp, tmp2);
}
}
tcg_temp_free_i32(tmp2);
neon_store_reg(rd, pass, tmp);
}
break;
return 1; /* handled by decodetree */
case 3: /* VQDMLAL scalar */
case 7: /* VQDMLSL scalar */
case 11: /* VQDMULL scalar */