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target/arm: Convert VJCVT to decodetree

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Convert the VJCVT instruction 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 2019-06-11 16:39:52 +01:00
parent 8fc9d8918c
commit 92073e9474
3 changed files with 33 additions and 11 deletions
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28
target/arm/translate-vfp.inc.c
View File

@ -2426,3 +2426,31 @@ static bool trans_VCVT_int_dp(DisasContext *s, arg_VCVT_int_dp *a)
tcg_temp_free_ptr(fpst);
return true;
}
static bool trans_VJCVT(DisasContext *s, arg_VJCVT *a)
{
TCGv_i32 vd;
TCGv_i64 vm;
if (!dc_isar_feature(aa32_jscvt, s)) {
return false;
}
/* UNDEF accesses to D16-D31 if they don't exist. */
if (!dc_isar_feature(aa32_fp_d32, s) && (a->vm & 0x10)) {
return false;
}
if (!vfp_access_check(s)) {
return true;
}
vm = tcg_temp_new_i64();
vd = tcg_temp_new_i32();
neon_load_reg64(vm, a->vm);
gen_helper_vjcvt(vd, vm, cpu_env);
neon_store_reg32(vd, a->vd);
tcg_temp_free_i64(vm);
tcg_temp_free_i32(vd);
return true;
}

12
target/arm/translate.c
View File

@ -3050,7 +3050,7 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
return 1;
case 15:
switch (rn) {
case 0 ... 17:
case 0 ... 19:
/* Already handled by decodetree */
return 1;
default:
@ -3085,13 +3085,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
rm_is_dp = false;
break;
case 0x13: /* vjcvt */
if (!dp || !dc_isar_feature(aa32_jscvt, s)) {
return 1;
}
rd_is_dp = false;
break;
default:
return 1;
}
@ -3177,9 +3170,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
switch (op) {
case 15: /* extension space */
switch (rn) {
case 19: /* vjcvt */
gen_helper_vjcvt(cpu_F0s, cpu_F0d, cpu_env);
break;
case 20: /* fshto */
gen_vfp_shto(dp, 16 - rm, 0);
break;

4
target/arm/vfp.decode
View File

@ -220,3 +220,7 @@ VCVT_int_sp ---- 1110 1.11 1000 .... 1010 s:1 1.0 .... \
vd=%vd_sp vm=%vm_sp
VCVT_int_dp ---- 1110 1.11 1000 .... 1011 s:1 1.0 .... \
vd=%vd_dp vm=%vm_sp
# VJCVT is always dp to sp
VJCVT ---- 1110 1.11 1001 .... 1011 11.0 .... \
vd=%vd_sp vm=%vm_dp