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target/openrisc: Implement muld, muldu, macu, msbu 

Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-02-18 17:03:40 -08:00
parent 6f7332ba71
commit cc5de49ebe
1 changed files with 108 additions and 0 deletions
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108
target/openrisc/translate.c
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@ -362,6 +362,56 @@ static void gen_divu(DisasContext *dc, TCGv dest, TCGv srca, TCGv srcb)
gen_ove_cy(dc);
}
static void gen_muld(DisasContext *dc, TCGv srca, TCGv srcb)
{
TCGv_i64 t1 = tcg_temp_new_i64();
TCGv_i64 t2 = tcg_temp_new_i64();
tcg_gen_ext_tl_i64(t1, srca);
tcg_gen_ext_tl_i64(t2, srcb);
if (TARGET_LONG_BITS == 32) {
tcg_gen_mul_i64(cpu_mac, t1, t2);
tcg_gen_movi_tl(cpu_sr_ov, 0);
} else {
TCGv_i64 high = tcg_temp_new_i64();
tcg_gen_muls2_i64(cpu_mac, high, t1, t2);
tcg_gen_sari_i64(t1, cpu_mac, 63);
tcg_gen_setcond_i64(TCG_COND_NE, t1, t1, high);
tcg_temp_free_i64(high);
tcg_gen_trunc_i64_tl(cpu_sr_ov, t1);
tcg_gen_neg_tl(cpu_sr_ov, cpu_sr_ov);
gen_ove_ov(dc);
}
tcg_temp_free_i64(t1);
tcg_temp_free_i64(t2);
}
static void gen_muldu(DisasContext *dc, TCGv srca, TCGv srcb)
{
TCGv_i64 t1 = tcg_temp_new_i64();
TCGv_i64 t2 = tcg_temp_new_i64();
tcg_gen_extu_tl_i64(t1, srca);
tcg_gen_extu_tl_i64(t2, srcb);
if (TARGET_LONG_BITS == 32) {
tcg_gen_mul_i64(cpu_mac, t1, t2);
tcg_gen_movi_tl(cpu_sr_cy, 0);
} else {
TCGv_i64 high = tcg_temp_new_i64();
tcg_gen_mulu2_i64(cpu_mac, high, t1, t2);
tcg_gen_setcondi_i64(TCG_COND_NE, high, high, 0);
tcg_gen_trunc_i64_tl(cpu_sr_cy, high);
tcg_temp_free_i64(high);
gen_ove_cy(dc);
}
tcg_temp_free_i64(t1);
tcg_temp_free_i64(t2);
}
static void gen_mac(DisasContext *dc, TCGv srca, TCGv srcb)
{
TCGv_i64 t1 = tcg_temp_new_i64();
@ -388,6 +438,25 @@ static void gen_mac(DisasContext *dc, TCGv srca, TCGv srcb)
gen_ove_ov(dc);
}
static void gen_macu(DisasContext *dc, TCGv srca, TCGv srcb)
{
TCGv_i64 t1 = tcg_temp_new_i64();
TCGv_i64 t2 = tcg_temp_new_i64();
tcg_gen_extu_tl_i64(t1, srca);
tcg_gen_extu_tl_i64(t2, srcb);
tcg_gen_mul_i64(t1, t1, t2);
tcg_temp_free_i64(t2);
/* Note that overflow is only computed during addition stage. */
tcg_gen_add_i64(cpu_mac, cpu_mac, t1);
tcg_gen_setcond_i64(TCG_COND_LTU, t1, cpu_mac, t1);
tcg_gen_trunc_i64_tl(cpu_sr_cy, t1);
tcg_temp_free_i64(t1);
gen_ove_cy(dc);
}
static void gen_msb(DisasContext *dc, TCGv srca, TCGv srcb)
{
TCGv_i64 t1 = tcg_temp_new_i64();
@ -414,6 +483,25 @@ static void gen_msb(DisasContext *dc, TCGv srca, TCGv srcb)
gen_ove_ov(dc);
}
static void gen_msbu(DisasContext *dc, TCGv srca, TCGv srcb)
{
TCGv_i64 t1 = tcg_temp_new_i64();
TCGv_i64 t2 = tcg_temp_new_i64();
tcg_gen_extu_tl_i64(t1, srca);
tcg_gen_extu_tl_i64(t2, srcb);
tcg_gen_mul_i64(t1, t1, t2);
/* Note that overflow is only computed during subtraction stage. */
tcg_gen_setcond_i64(TCG_COND_LTU, t2, cpu_mac, t1);
tcg_gen_sub_i64(cpu_mac, cpu_mac, t1);
tcg_gen_trunc_i64_tl(cpu_sr_cy, t2);
tcg_temp_free_i64(t2);
tcg_temp_free_i64(t1);
gen_ove_cy(dc);
}
static void gen_lwa(DisasContext *dc, TCGv rd, TCGv ra, int32_t ofs)
{
TCGv ea = tcg_temp_new();
@ -590,6 +678,11 @@ static void dec_calc(DisasContext *dc, uint32_t insn)
gen_mul(dc, cpu_R[rd], cpu_R[ra], cpu_R[rb]);
return;
case 0x7: /* l.muld */
LOG_DIS("l.muld r%d, r%d\n", ra, rb);
gen_muld(dc, cpu_R[ra], cpu_R[rb]);
break;
case 0x9: /* l.div */
LOG_DIS("l.div r%d, r%d, r%d\n", rd, ra, rb);
gen_div(dc, cpu_R[rd], cpu_R[ra], cpu_R[rb]);
@ -604,6 +697,11 @@ static void dec_calc(DisasContext *dc, uint32_t insn)
LOG_DIS("l.mulu r%d, r%d, r%d\n", rd, ra, rb);
gen_mulu(dc, cpu_R[rd], cpu_R[ra], cpu_R[rb]);
return;
case 0xc: /* l.muldu */
LOG_DIS("l.muldu r%d, r%d\n", ra, rb);
gen_muldu(dc, cpu_R[ra], cpu_R[rb]);
return;
}
break;
}
@ -916,6 +1014,16 @@ static void dec_mac(DisasContext *dc, uint32_t insn)
gen_msb(dc, cpu_R[ra], cpu_R[rb]);
break;
case 0x0003: /* l.macu */
LOG_DIS("l.macu r%d, r%d\n", ra, rb);
gen_macu(dc, cpu_R[ra], cpu_R[rb]);
break;
case 0x0004: /* l.msbu */
LOG_DIS("l.msbu r%d, r%d\n", ra, rb);
gen_msbu(dc, cpu_R[ra], cpu_R[rb]);
break;
default:
gen_illegal_exception(dc);
break;