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target/hppa: Squash d for pa1.x during decode

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The cond_need_ext predicate was created while we still had a
32-bit compilation mode.  It now makes more sense to treat D
as an absolute indicator of a 64-bit operation.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-03-25 16:33:50 -10:00
parent 46bb3d467c
commit 82d0c831ce
2 changed files with 33 additions and 25 deletions
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38
target/hppa/translate.c
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@ -200,6 +200,14 @@ static int cmpbid_c(DisasContext *ctx, int val)
return val ? val : 4; /* 0 == "*<<" */
}
/*
* In many places pa1.x did not decode the bit that later became
* the pa2.0 D bit. Suppress D unless the cpu is pa2.0.
*/
static int pa20_d(DisasContext *ctx, int val)
{
return ctx->is_pa20 & val;
}
/* Include the auto-generated decoder. */
#include "decode-insns.c.inc"
@ -693,12 +701,6 @@ static bool cond_need_cb(int c)
return c == 4 || c == 5;
}
/* Need extensions from TCGv_i32 to TCGv_i64. */
static bool cond_need_ext(DisasContext *ctx, bool d)
{
return !(ctx->is_pa20 && d);
}
/*
* Compute conditional for arithmetic. See Page 5-3, Table 5-1, of
* the Parisc 1.1 Architecture Reference Manual for details.
@ -715,7 +717,7 @@ static DisasCond do_cond(DisasContext *ctx, unsigned cf, bool d,
cond = cond_make_f();
break;
case 1: /* = / <> (Z / !Z) */
if (cond_need_ext(ctx, d)) {
if (!d) {
tmp = tcg_temp_new_i64();
tcg_gen_ext32u_i64(tmp, res);
res = tmp;
@ -725,7 +727,7 @@ static DisasCond do_cond(DisasContext *ctx, unsigned cf, bool d,
case 2: /* < / >= (N ^ V / !(N ^ V) */
tmp = tcg_temp_new_i64();
tcg_gen_xor_i64(tmp, res, sv);
if (cond_need_ext(ctx, d)) {
if (!d) {
tcg_gen_ext32s_i64(tmp, tmp);
}
cond = cond_make_0_tmp(TCG_COND_LT, tmp);
@ -742,7 +744,7 @@ static DisasCond do_cond(DisasContext *ctx, unsigned cf, bool d,
*/
tmp = tcg_temp_new_i64();
tcg_gen_eqv_i64(tmp, res, sv);
if (cond_need_ext(ctx, d)) {
if (!d) {
tcg_gen_sextract_i64(tmp, tmp, 31, 1);
tcg_gen_and_i64(tmp, tmp, res);
tcg_gen_ext32u_i64(tmp, tmp);
@ -760,13 +762,13 @@ static DisasCond do_cond(DisasContext *ctx, unsigned cf, bool d,
tmp = tcg_temp_new_i64();
tcg_gen_neg_i64(tmp, cb_msb);
tcg_gen_and_i64(tmp, tmp, res);
if (cond_need_ext(ctx, d)) {
if (!d) {
tcg_gen_ext32u_i64(tmp, tmp);
}
cond = cond_make_0_tmp(TCG_COND_EQ, tmp);
break;
case 6: /* SV / NSV (V / !V) */
if (cond_need_ext(ctx, d)) {
if (!d) {
tmp = tcg_temp_new_i64();
tcg_gen_ext32s_i64(tmp, sv);
sv = tmp;
@ -827,7 +829,7 @@ static DisasCond do_sub_cond(DisasContext *ctx, unsigned cf, bool d,
if (cf & 1) {
tc = tcg_invert_cond(tc);
}
if (cond_need_ext(ctx, d)) {
if (!d) {
TCGv_i64 t1 = tcg_temp_new_i64();
TCGv_i64 t2 = tcg_temp_new_i64();
@ -904,7 +906,7 @@ static DisasCond do_log_cond(DisasContext *ctx, unsigned cf, bool d,
g_assert_not_reached();
}
if (cond_need_ext(ctx, d)) {
if (!d) {
TCGv_i64 tmp = tcg_temp_new_i64();
if (ext_uns) {
@ -979,7 +981,7 @@ static DisasCond do_unit_zero_cond(unsigned cf, bool d, TCGv_i64 res)
static TCGv_i64 get_carry(DisasContext *ctx, bool d,
TCGv_i64 cb, TCGv_i64 cb_msb)
{
if (cond_need_ext(ctx, d)) {
if (!d) {
TCGv_i64 t = tcg_temp_new_i64();
tcg_gen_extract_i64(t, cb, 32, 1);
return t;
@ -3448,12 +3450,12 @@ static bool trans_bb_sar(DisasContext *ctx, arg_bb_sar *a)
tmp = tcg_temp_new_i64();
tcg_r = load_gpr(ctx, a->r);
if (cond_need_ext(ctx, a->d)) {
if (a->d) {
tcg_gen_shl_i64(tmp, tcg_r, cpu_sar);
} else {
/* Force shift into [32,63] */
tcg_gen_ori_i64(tmp, cpu_sar, 32);
tcg_gen_shl_i64(tmp, tcg_r, tmp);
} else {
tcg_gen_shl_i64(tmp, tcg_r, cpu_sar);
}
cond = cond_make_0_tmp(a->c ? TCG_COND_GE : TCG_COND_LT, tmp);
@ -3470,7 +3472,7 @@ static bool trans_bb_imm(DisasContext *ctx, arg_bb_imm *a)
tmp = tcg_temp_new_i64();
tcg_r = load_gpr(ctx, a->r);
p = a->p | (cond_need_ext(ctx, a->d) ? 32 : 0);
p = a->p | (a->d ? 0 : 32);
tcg_gen_shli_i64(tmp, tcg_r, p);
cond = cond_make_0(a->c ? TCG_COND_GE : TCG_COND_LT, tmp);