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target/arm: Convert Neon 2-reg-scalar float multiplies to decodetree

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Convert the float versions of VMLA, VMLS and VMUL in the Neon
2-reg-scalar group to decodetree.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
As noted in the comment on the WRAP_FP_FN macro, we could have
had a do_2scalar_fp() function, but for 3 insns it seemed
simpler to just do the wrapping to get hold of the fpstatus ptr.
(These are the only fp insns in the group.)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Peter Maydell 2020-06-16 10:32:27 +01:00
parent 96fc80f5f1
commit 85ac9aef9a
3 changed files with 71 additions and 34 deletions
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37
target/arm/translate.c
View file

@ -5187,15 +5187,11 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
case 0: /* Integer VMLA scalar */
case 4: /* Integer VMLS scalar */
case 8: /* Integer VMUL scalar */
return 1; /* handled by decodetree */
case 1: /* Float VMLA scalar */
case 5: /* Floating point VMLS scalar */
case 9: /* Floating point VMUL scalar */
if (size == 1) {
return 1;
}
/* fall through */
return 1; /* handled by decodetree */
case 12: /* VQDMULH scalar */
case 13: /* VQRDMULH scalar */
if (u && ((rd | rn) & 1)) {
@ -5212,41 +5208,14 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
} else {
gen_helper_neon_qdmulh_s32(tmp, cpu_env, tmp, tmp2);
}
} else if (op == 13) {
} 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);
}
} else {
TCGv_ptr fpstatus = get_fpstatus_ptr(1);
gen_helper_vfp_muls(tmp, tmp, tmp2, fpstatus);
tcg_temp_free_ptr(fpstatus);
}
tcg_temp_free_i32(tmp2);
if (op < 8) {
/* Accumulate. */
tmp2 = neon_load_reg(rd, pass);
switch (op) {
case 1:
{
TCGv_ptr fpstatus = get_fpstatus_ptr(1);
gen_helper_vfp_adds(tmp, tmp, tmp2, fpstatus);
tcg_temp_free_ptr(fpstatus);
break;
}
case 5:
{
TCGv_ptr fpstatus = get_fpstatus_ptr(1);
gen_helper_vfp_subs(tmp, tmp2, tmp, fpstatus);
tcg_temp_free_ptr(fpstatus);
break;
}
default:
abort();
}
tcg_temp_free_i32(tmp2);
}
neon_store_reg(rd, pass, tmp);
}
break;