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target/arm: Convert VSQRT to decodetree

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Convert the VSQRT instruction to decodetree.

Backports commit b8474540cbce4e2fa45010416375d1bcbe86dc15 from qemu
This commit is contained in:
Peter Maydell 2019-06-13 18:45:42 -04:00 committed by Lioncash
parent 7aea3da6b7
commit ee30962891
No known key found for this signature in database
GPG Key ID: 4E3C3CC1031BA9C7
3 changed files with 26 additions and 14 deletions
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20
qemu/target/arm/translate-vfp.inc.c
View File

@ -1933,3 +1933,23 @@ static bool trans_VNEG_dp(DisasContext *s, arg_VNEG_dp *a)
{
return do_vfp_2op_dp(s, gen_helper_vfp_negd, a->vd, a->vm);
}
static void gen_VSQRT_sp(TCGContext *tcg_ctx, TCGv_i32 vd, TCGv_i32 vm)
{
gen_helper_vfp_sqrts(tcg_ctx, vd, vm, tcg_ctx->cpu_env);
}
static bool trans_VSQRT_sp(DisasContext *s, arg_VSQRT_sp *a)
{
return do_vfp_2op_sp(s, gen_VSQRT_sp, a->vd, a->vm);
}
static void gen_VSQRT_dp(TCGContext *tcg_ctx, TCGv_i64 vd, TCGv_i64 vm)
{
gen_helper_vfp_sqrtd(tcg_ctx, vd, vm, tcg_ctx->cpu_env);
}
static bool trans_VSQRT_dp(DisasContext *s, arg_VSQRT_dp *a)
{
return do_vfp_2op_dp(s, gen_VSQRT_dp, a->vd, a->vm);
}

15
qemu/target/arm/translate.c
View File

@ -1447,15 +1447,6 @@ static inline void gen_vfp_neg(DisasContext *s, int dp)
gen_helper_vfp_negs(tcg_ctx, s->F0s, s->F0s);
}
static inline void gen_vfp_sqrt(DisasContext *s, int dp)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
if (dp)
gen_helper_vfp_sqrtd(tcg_ctx, s->F0d, s->F0d, tcg_ctx->cpu_env);
else
gen_helper_vfp_sqrts(tcg_ctx, s->F0s, s->F0s, tcg_ctx->cpu_env);
}
static inline void gen_vfp_cmp(DisasContext *s, int dp)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
@ -3199,7 +3190,7 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
return 1;
case 15:
switch (rn) {
case 1 ... 2:
case 1 ... 3:
/* Already handled by decodetree */
return 1;
default:
@ -3213,7 +3204,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
/* rn is opcode, encoded as per VFP_SREG_N. */
switch (rn) {
case 0x00: /* vmov */
case 0x03: /* vsqrt */
break;
case 0x04: /* vcvtb.f64.f16, vcvtb.f32.f16 */
@ -3391,9 +3381,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
case 0: /* cpy */
/* no-op */
break;
case 3: /* sqrt */
gen_vfp_sqrt(s, dp);
break;
case 4: /* vcvtb.f32.f16, vcvtb.f64.f16 */
{
TCGv_ptr fpst = get_fpstatus_ptr(s, false);

5
qemu/target/arm/vfp.decode
View File

@ -166,3 +166,8 @@ VNEG_sp ---- 1110 1.11 0001 .... 1010 01.0 .... \
vd=%vd_sp vm=%vm_sp
VNEG_dp ---- 1110 1.11 0001 .... 1011 01.0 .... \
vd=%vd_dp vm=%vm_dp
VSQRT_sp ---- 1110 1.11 0001 .... 1010 11.0 .... \
vd=%vd_sp vm=%vm_sp
VSQRT_dp ---- 1110 1.11 0001 .... 1011 11.0 .... \
vd=%vd_dp vm=%vm_dp