OpenE2K
/
qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

target: e2k: Reorg lcnt decrement.

This commit is contained in:
Denis Drakhnia 2020-11-14 12:16:02 +02:00 committed by Denis Drakhnia
parent a5f7f32a8f
commit ed83debd31
1 changed files with 53 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
target/e2k/translate/control.c
View File

@ -3,39 +3,37 @@
#include "exec/log.h"
#include "translate.h"
static inline void gen_alc_dec(TCGCond cond, TCGv_i64 jmp_cond)
static inline void gen_lcnt_dec(TCGv_i64 ret, TCGv_i64 lsr)
{
TCGv_i64 one = tcg_const_i64(1);
TCGv_i32 zero = tcg_const_i32(0);
TCGv_i32 lcnt = tcg_temp_new_i32();
TCGv_i32 t0 = tcg_temp_new_i32();
TCGv_i32 t1 = tcg_temp_new_i32();
TCGv_i32 t2 = tcg_temp_new_i32();
TCGv_i32 t3 = tcg_temp_new_i32();
TCGv_i32 t4 = tcg_temp_new_i32();
TCGv_i32 t5 = tcg_temp_new_i32();
TCGv_i32 t6 = tcg_temp_new_i32();
TCGv_i64 t7 = tcg_temp_new_i64();
tcg_gen_extrl_i64_i32(t0, e2k_cs.lsr);
tcg_gen_subi_i32(t1, t0, 1);
tcg_gen_movcond_i32(TCG_COND_LTU, t2, t1, t0, t1, t0);
tcg_gen_setcondi_i32(TCG_COND_EQ, t3, t1, 0);
tcg_gen_extrl_i64_i32(lcnt, lsr);
tcg_gen_subi_i32(t0, lcnt, 1);
tcg_gen_movcond_i32(TCG_COND_EQ, t1, lcnt, zero, zero, t0);
/* overflow bit */
tcg_gen_extrh_i64_i32(t2, lsr);
tcg_gen_setcondi_i32(TCG_COND_EQ, t3, lcnt, 1);
tcg_gen_shli_i32(t4, t3, LSR_OVER_OFF - 32);
tcg_gen_extrh_i64_i32(t5, e2k_cs.lsr);
tcg_gen_or_i32(t6, t5, t4);
tcg_gen_concat_i32_i64(t7, t2, t6);
tcg_gen_movcond_i64(cond, e2k_cs.lsr, jmp_cond, one, t7, e2k_cs.lsr);
tcg_gen_or_i32(t5, t2, t4);
tcg_gen_concat_i32_i64(ret, t1, t5);
tcg_temp_free_i64(t7);
tcg_temp_free_i32(t6);
tcg_temp_free_i32(t5);
tcg_temp_free_i32(t4);
tcg_temp_free_i32(t3);
tcg_temp_free_i32(t2);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t0);
tcg_temp_free_i32(lcnt);
tcg_temp_free_i32(zero);
tcg_temp_free_i64(one);
}
static inline void gen_pcur_inc(TCGv_i32 ret, TCGv_i32 br)
@ -107,6 +105,35 @@ static inline void gen_movcond_flag_i32(TCGv_i32 ret, int flag, TCGv_i32 cond,
tcg_temp_free_i32(one);
}
static inline void gen_movcond_flag_i64(TCGv_i64 ret, int flag, TCGv_i64 cond,
TCGv_i64 v1, TCGv_i64 v2)
{
TCGv_i64 one = tcg_const_i64(1);
TCGCond c;
switch (flag) {
case 0x00:
c = TCG_COND_NEVER;
break;
case 0x01:
c = TCG_COND_EQ;
break;
case 0x02:
c = TCG_COND_NE;
break;
case 0x03:
c = TCG_COND_ALWAYS;
break;
default:
g_assert_not_reached();
break;
}
tcg_gen_movcond_i64(c, ret, cond, one, v1, v2);
tcg_temp_free_i64(one);
}
void e2k_win_commit(DisasContext *dc)
{
TCGv_i32 cond = tcg_temp_new_i32();
@ -114,17 +141,21 @@ void e2k_win_commit(DisasContext *dc)
uint32_t ss = dc->bundle.ss;
// unsigned int vfdi = (ss & 0x04000000) >> 26;
// unsigned int abg = (ss & 0x01800000) >> 23;
unsigned int abp = GET_FIELD(ss, 18, 19);
unsigned int abn = GET_FIELD(ss, 21, 22);
int alc = GET_FIELD(ss, 16, 17);
int abp = GET_FIELD(ss, 18, 19);
int abn = GET_FIELD(ss, 21, 22);
tcg_gen_trunc_tl_i32(cond, dc->jmp.cond);
if (GET_BIT(ss, 16)) {
gen_alc_dec(TCG_COND_EQ, dc->jmp.cond);
}
if (GET_BIT(ss, 17)) {
gen_alc_dec(TCG_COND_NE, dc->jmp.cond);
if (alc) {
TCGv_i64 t0 = tcg_temp_new_i64();
gen_lcnt_dec(t0, e2k_cs.lsr);
gen_movcond_flag_i64(e2k_cs.lsr, alc, dc->jmp.cond, t0, e2k_cs.lsr);
tcg_temp_free_i64(t0);
}
if (abp) {
TCGv_i32 t0 = tcg_temp_new_i32();