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target/openrisc: Add support for ORFPX64A32

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This is hardware support for double-precision floating-point using
pairs of 32-bit registers.  Fix latent bugs in the heretofore unused
helper_itofd and helper_ftoid.  Include the bit for cpu "any".
Change the default cpu for linux-user to "any".

Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-05-06 14:49:25 -07:00
parent fe636d3722
commit 62f2b0389f
7 changed files with 333 additions and 4 deletions
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2
linux-user/openrisc/target_elf.h
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@ -9,6 +9,6 @@
#define OPENRISC_TARGET_ELF_H
static inline const char *cpu_get_model(uint32_t eflags)
{
return "or1200";
return "any";
}
#endif

2
target/openrisc/cpu.c
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@ -132,7 +132,7 @@ static void openrisc_any_initfn(Object *obj)
cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S |
CPUCFGR_AVRP | CPUCFGR_EVBARP;
CPUCFGR_AVRP | CPUCFGR_EVBARP | CPUCFGR_OF64A32S;
/* 1Way, TLB_SIZE entries. */
cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))

56
target/openrisc/disas.c
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@ -166,3 +166,59 @@ FP_INSN(sfgt, s, "r%d, r%d", a->a, a->b)
FP_INSN(sfge, s, "r%d, r%d", a->a, a->b)
FP_INSN(sflt, s, "r%d, r%d", a->a, a->b)
FP_INSN(sfle, s, "r%d, r%d", a->a, a->b)
FP_INSN(add, d, "r%d,r%d, r%d,r%d, r%d,r%d",
a->d, a->d + a->dp + 1,
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(sub, d, "r%d,r%d, r%d,r%d, r%d,r%d",
a->d, a->d + a->dp + 1,
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(mul, d, "r%d,r%d, r%d,r%d, r%d,r%d",
a->d, a->d + a->dp + 1,
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(div, d, "r%d,r%d, r%d,r%d, r%d,r%d",
a->d, a->d + a->dp + 1,
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(rem, d, "r%d,r%d, r%d,r%d, r%d,r%d",
a->d, a->d + a->dp + 1,
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(madd, d, "r%d,r%d, r%d,r%d, r%d,r%d",
a->d, a->d + a->dp + 1,
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(itof, d, "r%d,r%d, r%d,r%d",
a->d, a->d + a->dp + 1,
a->a, a->a + a->ap + 1)
FP_INSN(ftoi, d, "r%d,r%d, r%d,r%d",
a->d, a->d + a->dp + 1,
a->a, a->a + a->ap + 1)
FP_INSN(stod, d, "r%d,r%d, r%d",
a->d, a->d + a->dp + 1, a->a)
FP_INSN(dtos, d, "r%d r%d,r%d",
a->d, a->a, a->a + a->ap + 1)
FP_INSN(sfeq, d, "r%d,r%d, r%d,r%d",
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(sfne, d, "r%d,r%d, r%d,r%d",
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(sfgt, d, "r%d,r%d, r%d,r%d",
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(sfge, d, "r%d,r%d, r%d,r%d",
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(sflt, d, "r%d,r%d, r%d,r%d",
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)
FP_INSN(sfle, d, "r%d,r%d, r%d,r%d",
a->a, a->a + a->ap + 1,
a->b, a->b + a->bp + 1)

14
target/openrisc/fpu_helper.c
View File

@ -63,7 +63,7 @@ void HELPER(update_fpcsr)(CPUOpenRISCState *env)
uint64_t HELPER(itofd)(CPUOpenRISCState *env, uint64_t val)
{
return int32_to_float64(val, &env->fp_status);
return int64_to_float64(val, &env->fp_status);
}
uint32_t HELPER(itofs)(CPUOpenRISCState *env, uint32_t val)
@ -73,7 +73,7 @@ uint32_t HELPER(itofs)(CPUOpenRISCState *env, uint32_t val)
uint64_t HELPER(ftoid)(CPUOpenRISCState *env, uint64_t val)
{
return float32_to_int64(val, &env->fp_status);
return float64_to_int64_round_to_zero(val, &env->fp_status);
}
uint32_t HELPER(ftois)(CPUOpenRISCState *env, uint32_t val)
@ -81,6 +81,16 @@ uint32_t HELPER(ftois)(CPUOpenRISCState *env, uint32_t val)
return float32_to_int32_round_to_zero(val, &env->fp_status);
}
uint64_t HELPER(stod)(CPUOpenRISCState *env, uint32_t val)
{
return float32_to_float64(val, &env->fp_status);
}
uint32_t HELPER(dtos)(CPUOpenRISCState *env, uint64_t val)
{
return float64_to_float32(val, &env->fp_status);
}
#define FLOAT_CALC(name) \
uint64_t helper_float_ ## name ## _d(CPUOpenRISCState *env, \
uint64_t fdt0, uint64_t fdt1) \

2
target/openrisc/helper.h
View File

@ -30,6 +30,8 @@ DEF_HELPER_FLAGS_2(itofd, TCG_CALL_NO_RWG, i64, env, i64)
DEF_HELPER_FLAGS_2(itofs, TCG_CALL_NO_RWG, i32, env, i32)
DEF_HELPER_FLAGS_2(ftoid, TCG_CALL_NO_RWG, i64, env, i64)
DEF_HELPER_FLAGS_2(ftois, TCG_CALL_NO_RWG, i32, env, i32)
DEF_HELPER_FLAGS_2(stod, TCG_CALL_NO_RWG, i64, env, i32)
DEF_HELPER_FLAGS_2(dtos, TCG_CALL_NO_RWG, i32, env, i64)
DEF_HELPER_FLAGS_4(float_madd_s, TCG_CALL_NO_RWG, i32, env, i32, i32, i32)
DEF_HELPER_FLAGS_4(float_madd_d, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)

31
target/openrisc/insns.decode
View File

@ -22,6 +22,9 @@
&ab a b
&dal d a l
&ai a i
&dab_pair d a b dp ap bp
&ab_pair a b ap bp
&da_pair d a dp ap
####
# System Instructions
@ -187,3 +190,31 @@ lf_sfgt_s 110010 ----- a:5 b:5 --- 00001010
lf_sfge_s 110010 ----- a:5 b:5 --- 00001011
lf_sflt_s 110010 ----- a:5 b:5 --- 00001100
lf_sfle_s 110010 ----- a:5 b:5 --- 00001101
####
# DP Instructions
####
@dab_pair ...... d:5 a:5 b:5 dp:1 ap:1 bp:1 ........ &dab_pair
@ab_pair ...... ..... a:5 b:5 . ap:1 bp:1 ........ &ab_pair
@da_pair ...... d:5 a:5 ..... dp:1 ap:1 . ........ &da_pair
lf_add_d 110010 ..... ..... ..... ... 00010000 @dab_pair
lf_sub_d 110010 ..... ..... ..... ... 00010001 @dab_pair
lf_mul_d 110010 ..... ..... ..... ... 00010010 @dab_pair
lf_div_d 110010 ..... ..... ..... ... 00010011 @dab_pair
lf_rem_d 110010 ..... ..... ..... ... 00010110 @dab_pair
lf_madd_d 110010 ..... ..... ..... ... 00010111 @dab_pair
lf_itof_d 110010 ..... ..... 00000 ..0 00010100 @da_pair
lf_ftoi_d 110010 ..... ..... 00000 ..0 00010101 @da_pair
lf_stod_d 110010 d:5 a:5 00000 dp:1 0 0 00110100
lf_dtos_d 110010 d:5 a:5 00000 0 ap:1 0 00110101
lf_sfeq_d 110010 00000 ..... ..... 0.. 00011000 @ab_pair
lf_sfne_d 110010 00000 ..... ..... 0.. 00011001 @ab_pair
lf_sfgt_d 110010 00000 ..... ..... 0.. 00011010 @ab_pair
lf_sfge_d 110010 00000 ..... ..... 0.. 00011011 @ab_pair
lf_sflt_d 110010 00000 ..... ..... 0.. 00011100 @ab_pair
lf_sfle_d 110010 00000 ..... ..... 0.. 00011101 @ab_pair

230
target/openrisc/translate.c
View File

@ -146,6 +146,11 @@ static bool check_of32s(DisasContext *dc)
return dc->cpucfgr & CPUCFGR_OF32S;
}
static bool check_of64a32s(DisasContext *dc)
{
return dc->cpucfgr & CPUCFGR_OF64A32S;
}
static TCGv cpu_R(DisasContext *dc, int reg)
{
if (reg == 0) {
@ -1260,6 +1265,231 @@ static bool trans_lf_sfle_s(DisasContext *dc, arg_ab *a)
return do_fpcmp(dc, a, gen_helper_float_le_s, false, false);
}
static bool check_pair(DisasContext *dc, int r, int p)
{
return r + 1 + p < 32;
}
static void load_pair(DisasContext *dc, TCGv_i64 t, int r, int p)
{
tcg_gen_concat_i32_i64(t, cpu_R(dc, r + 1 + p), cpu_R(dc, r));
}
static void save_pair(DisasContext *dc, TCGv_i64 t, int r, int p)
{
tcg_gen_extr_i64_i32(cpu_R(dc, r + 1 + p), cpu_R(dc, r), t);
}
static bool do_dp3(DisasContext *dc, arg_dab_pair *a,
void (*fn)(TCGv_i64, TCGv_env, TCGv_i64, TCGv_i64))
{
TCGv_i64 t0, t1;
if (!check_of64a32s(dc) ||
!check_pair(dc, a->a, a->ap) ||
!check_pair(dc, a->b, a->bp) ||
!check_pair(dc, a->d, a->dp)) {
return false;
}
check_r0_write(dc, a->d);
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
load_pair(dc, t0, a->a, a->ap);
load_pair(dc, t1, a->b, a->bp);
fn(t0, cpu_env, t0, t1);
save_pair(dc, t0, a->d, a->dp);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
gen_helper_update_fpcsr(cpu_env);
return true;
}
static bool do_dp2(DisasContext *dc, arg_da_pair *a,
void (*fn)(TCGv_i64, TCGv_env, TCGv_i64))
{
TCGv_i64 t0;
if (!check_of64a32s(dc) ||
!check_pair(dc, a->a, a->ap) ||
!check_pair(dc, a->d, a->dp)) {
return false;
}
check_r0_write(dc, a->d);
t0 = tcg_temp_new_i64();
load_pair(dc, t0, a->a, a->ap);
fn(t0, cpu_env, t0);
save_pair(dc, t0, a->d, a->dp);
tcg_temp_free_i64(t0);
gen_helper_update_fpcsr(cpu_env);
return true;
}
static bool do_dpcmp(DisasContext *dc, arg_ab_pair *a,
void (*fn)(TCGv, TCGv_env, TCGv_i64, TCGv_i64),
bool inv, bool swap)
{
TCGv_i64 t0, t1;
if (!check_of64a32s(dc) ||
!check_pair(dc, a->a, a->ap) ||
!check_pair(dc, a->b, a->bp)) {
return false;
}
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
load_pair(dc, t0, a->a, a->ap);
load_pair(dc, t1, a->b, a->bp);
if (swap) {
fn(cpu_sr_f, cpu_env, t1, t0);
} else {
fn(cpu_sr_f, cpu_env, t0, t1);
}
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
if (inv) {
tcg_gen_xori_tl(cpu_sr_f, cpu_sr_f, 1);
}
gen_helper_update_fpcsr(cpu_env);
return true;
}
static bool trans_lf_add_d(DisasContext *dc, arg_dab_pair *a)
{
return do_dp3(dc, a, gen_helper_float_add_d);
}
static bool trans_lf_sub_d(DisasContext *dc, arg_dab_pair *a)
{
return do_dp3(dc, a, gen_helper_float_sub_d);
}
static bool trans_lf_mul_d(DisasContext *dc, arg_dab_pair *a)
{
return do_dp3(dc, a, gen_helper_float_mul_d);
}
static bool trans_lf_div_d(DisasContext *dc, arg_dab_pair *a)
{
return do_dp3(dc, a, gen_helper_float_div_d);
}
static bool trans_lf_rem_d(DisasContext *dc, arg_dab_pair *a)
{
return do_dp3(dc, a, gen_helper_float_rem_d);
}
static bool trans_lf_itof_d(DisasContext *dc, arg_da_pair *a)
{
return do_dp2(dc, a, gen_helper_itofd);
}
static bool trans_lf_ftoi_d(DisasContext *dc, arg_da_pair *a)
{
return do_dp2(dc, a, gen_helper_ftoid);
}
static bool trans_lf_stod_d(DisasContext *dc, arg_lf_stod_d *a)
{
TCGv_i64 t0;
if (!check_of64a32s(dc) ||
!check_pair(dc, a->d, a->dp)) {
return false;
}
check_r0_write(dc, a->d);
t0 = tcg_temp_new_i64();
gen_helper_stod(t0, cpu_env, cpu_R(dc, a->a));
save_pair(dc, t0, a->d, a->dp);
tcg_temp_free_i64(t0);
gen_helper_update_fpcsr(cpu_env);
return true;
}
static bool trans_lf_dtos_d(DisasContext *dc, arg_lf_dtos_d *a)
{
TCGv_i64 t0;
if (!check_of64a32s(dc) ||
!check_pair(dc, a->a, a->ap)) {
return false;
}
check_r0_write(dc, a->d);
t0 = tcg_temp_new_i64();
load_pair(dc, t0, a->a, a->ap);
gen_helper_dtos(cpu_R(dc, a->d), cpu_env, t0);
tcg_temp_free_i64(t0);
gen_helper_update_fpcsr(cpu_env);
return true;
}
static bool trans_lf_madd_d(DisasContext *dc, arg_dab_pair *a)
{
TCGv_i64 t0, t1, t2;
if (!check_of64a32s(dc) ||
!check_pair(dc, a->a, a->ap) ||
!check_pair(dc, a->b, a->bp) ||
!check_pair(dc, a->d, a->dp)) {
return false;
}
check_r0_write(dc, a->d);
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
t2 = tcg_temp_new_i64();
load_pair(dc, t0, a->d, a->dp);
load_pair(dc, t1, a->a, a->ap);
load_pair(dc, t2, a->b, a->bp);
gen_helper_float_madd_d(t0, cpu_env, t0, t1, t2);
save_pair(dc, t0, a->d, a->dp);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
tcg_temp_free_i64(t2);
gen_helper_update_fpcsr(cpu_env);
return true;
}
static bool trans_lf_sfeq_d(DisasContext *dc, arg_ab_pair *a)
{
return do_dpcmp(dc, a, gen_helper_float_eq_d, false, false);
}
static bool trans_lf_sfne_d(DisasContext *dc, arg_ab_pair *a)
{
return do_dpcmp(dc, a, gen_helper_float_eq_d, true, false);
}
static bool trans_lf_sfgt_d(DisasContext *dc, arg_ab_pair *a)
{
return do_dpcmp(dc, a, gen_helper_float_lt_d, false, true);
}
static bool trans_lf_sfge_d(DisasContext *dc, arg_ab_pair *a)
{
return do_dpcmp(dc, a, gen_helper_float_le_d, false, true);
}
static bool trans_lf_sflt_d(DisasContext *dc, arg_ab_pair *a)
{
return do_dpcmp(dc, a, gen_helper_float_lt_d, false, false);
}
static bool trans_lf_sfle_d(DisasContext *dc, arg_ab_pair *a)
{
return do_dpcmp(dc, a, gen_helper_float_le_d, false, false);
}
static void openrisc_tr_init_disas_context(DisasContextBase *dcb, CPUState *cs)
{
DisasContext *dc = container_of(dcb, DisasContext, base);