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target/arm: Convert Neon VQABS, VQNEG to decodetree

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Convert the Neon VQABS and VQNEG insns to decodetree.
Since these are the only ones which need cpu_env passing to
the helper, we wrap the helper rather than creating a whole
new do_2misc_env() function.

Backports commit 4936f38abe6db0a9d23fd04e4cb0cf4d51cff174 from qemu
This commit is contained in:
Peter Maydell 2021-02-25 12:53:17 -05:00 committed by Lioncash
parent 4033a3ca5c
commit 3dcee11013
3 changed files with 40 additions and 28 deletions
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3
qemu/target/arm/neon-dp.decode
View file

@ -465,6 +465,9 @@ Vimm_1r 1111 001 . 1 . 000 ... .... cmode:4 0 . op:1 1 .... @1reg_imm
VPADAL_S 1111 001 11 . 11 .. 00 .... 0 1100 . . 0 .... @2misc
VPADAL_U 1111 001 11 . 11 .. 00 .... 0 1101 . . 0 .... @2misc
VQABS 1111 001 11 . 11 .. 00 .... 0 1110 . . 0 .... @2misc
VQNEG 1111 001 11 . 11 .. 00 .... 0 1111 . . 0 .... @2misc
VCGT0 1111 001 11 . 11 .. 01 .... 0 0000 . . 0 .... @2misc
VCGE0 1111 001 11 . 11 .. 01 .... 0 0001 . . 0 .... @2misc
VCEQ0 1111 001 11 . 11 .. 01 .... 0 0010 . . 0 .... @2misc

35
qemu/target/arm/translate-neon.inc.c
View file

@ -3717,3 +3717,38 @@ static bool trans_VRSQRTE(DisasContext *s, arg_2misc *a)
}
return do_2misc(s, a, gen_helper_rsqrte_u32);
}
#define WRAP_1OP_ENV_FN(WRAPNAME, FUNC) \
static void WRAPNAME(TCGContext *s, TCGv_i32 d, TCGv_i32 m) \
{ \
FUNC(s, d, s->cpu_env, m); \
}
WRAP_1OP_ENV_FN(gen_VQABS_s8, gen_helper_neon_qabs_s8)
WRAP_1OP_ENV_FN(gen_VQABS_s16, gen_helper_neon_qabs_s16)
WRAP_1OP_ENV_FN(gen_VQABS_s32, gen_helper_neon_qabs_s32)
WRAP_1OP_ENV_FN(gen_VQNEG_s8, gen_helper_neon_qneg_s8)
WRAP_1OP_ENV_FN(gen_VQNEG_s16, gen_helper_neon_qneg_s16)
WRAP_1OP_ENV_FN(gen_VQNEG_s32, gen_helper_neon_qneg_s32)
static bool trans_VQABS(DisasContext *s, arg_2misc *a)
{
static NeonGenOneOpFn * const fn[] = {
gen_VQABS_s8,
gen_VQABS_s16,
gen_VQABS_s32,
NULL,
};
return do_2misc(s, a, fn[a->size]);
}
static bool trans_VQNEG(DisasContext *s, arg_2misc *a)
{
static NeonGenOneOpFn * const fn[] = {
gen_VQNEG_s8,
gen_VQNEG_s16,
gen_VQNEG_s32,
NULL,
};
return do_2misc(s, a, fn[a->size]);
}

30
qemu/target/arm/translate.c
View file

@ -5047,6 +5047,8 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
case NEON_2RM_VNEG_F:
case NEON_2RM_VRECPE:
case NEON_2RM_VRSQRTE:
case NEON_2RM_VQABS:
case NEON_2RM_VQNEG:
/* handled by decodetree */
return 1;
case NEON_2RM_VTRN:
@ -5068,34 +5070,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
for (pass = 0; pass < (q ? 4 : 2); pass++) {
tmp = neon_load_reg(s, rm, pass);
switch (op) {
case NEON_2RM_VQABS:
switch (size) {
case 0:
gen_helper_neon_qabs_s8(tcg_ctx, tmp, tcg_ctx->cpu_env, tmp);
break;
case 1:
gen_helper_neon_qabs_s16(tcg_ctx, tmp, tcg_ctx->cpu_env, tmp);
break;
case 2:
gen_helper_neon_qabs_s32(tcg_ctx, tmp, tcg_ctx->cpu_env, tmp);
break;
default: abort();
}
break;
case NEON_2RM_VQNEG:
switch (size) {
case 0:
gen_helper_neon_qneg_s8(tcg_ctx, tmp, tcg_ctx->cpu_env, tmp);
break;
case 1:
gen_helper_neon_qneg_s16(tcg_ctx, tmp, tcg_ctx->cpu_env, tmp);
break;
case 2:
gen_helper_neon_qneg_s32(tcg_ctx, tmp, tcg_ctx->cpu_env, tmp);
break;
default: abort();
}
break;
case NEON_2RM_VCGT0_F:
{
TCGv_ptr fpstatus = get_fpstatus_ptr(tcg_ctx, 1);