OpenE2K/qemu-e2k
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target: e2k: Add e2k_gen get and set field.

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This commit is contained in:
Denis Drakhnia 2020-11-12 10:30:03 +02:00
parent 26a18eebd3
commit f0d5277ccf
4 changed files with 42 additions and 13 deletions
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18
target/e2k/cpu.h
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@ -25,16 +25,14 @@ typedef struct {
target_ulong wregs[WREGS_SIZE]; // window regs
target_ulong *win_ptr;
uint64_t pregs;
unsigned int wbs; // window regs offset (* 2)
unsigned int wsz; // window regs size (* 2)
unsigned int nfx; // TODO
unsigned int dbl; // TODO
unsigned int rbs; // based regs offset (* 2)
unsigned int rsz; // based regs window size (* 2 + 2)
unsigned int rcur; // based regs current index (* 2)
unsigned int psz; // pred regs window size
unsigned int is_jmp;
uint32_t wbs; // window regs offset (* 2)
uint32_t wsz; // window regs size (* 2)
uint32_t nfx; // TODO
uint32_t dbl; // TODO
uint32_t rbs; // based regs offset (* 2)
uint32_t rsz; // based regs window size (* 2 + 2)
uint32_t rcur; // based regs current index (* 2)
uint32_t psz; // pred regs window size
/* control registers */
target_ulong ctprs[3]; // Control Transfer Preparation Register (CTPR)

30
target/e2k/translate.h
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@ -6,9 +6,10 @@
#define STATIC_JUMP DISAS_TARGET_0
#define DYNAMIC_JUMP DISAS_TARGET_1
#define GEN_MASK(start, end) (((1 << ((end) - (start) + 1)) - 1) << start)
#define GET_BIT(v, index) (((v) >> (index)) & 1)
#define GET_FIELD(v, start, end) \
(((v) >> (start)) & ((1 << ((end) - (start) + 1)) - 1))
(((v) & GEN_MASK(start, end)) >> (start))
#define IS_BASED(i) (((i) & 0x80) == 0)
#define IS_REGULAR(i) (((i) & 0xc0) == 0x80)
@ -147,6 +148,33 @@ static inline void e2k_gen_wrap_i32(TCGv_i32 ret, TCGv_i32 x, TCGv_i32 y)
tcg_temp_free_i32(t0);
}
static inline void e2k_gen_get_field_i64(TCGv_i64 ret, TCGv_i64 val,
unsigned int start, unsigned int end)
{
TCGv_i64 t0 = tcg_temp_new_i64();
tcg_gen_and_i64(t0, val, GEN_MASK(start, end));
tcg_gen_shli_i64(ret, t0, start);
tcg_temp_free_i64(t0);
}
static inline void e2k_gen_set_field_i64(TCGv_i64 ret, TCGv_i64 val,
uint64_t field, unsigned int start, unsigned int end)
{
uint64_t mask = GEN_MASK(start, end);
TCGv_i64 t0 = tcg_const_i64(~mask);
TCGv_i64 t1 = tcg_const_i64((field << start) & mask);
TCGv_i64 t2 = tcg_temp_new_i64();
tcg_gen_and_i64(t2, val, t0);
tcg_gen_or_i64(ret, t2, t1);
tcg_temp_free_i64(t2);
tcg_temp_free_i64(t1);
tcg_temp_free_i64(t0);
}
TCGv_i64 e2k_get_preg(DisasContext *dc, int reg);
void e2k_gen_store_preg(int reg, TCGv_i64 val);
TCGv_i64 e2k_get_wreg(DisasContext *dc, int reg);

2
target/e2k/translate/control.c
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@ -85,7 +85,7 @@ static void gen_cs0(DisasContext *dc)
if (type == DISP || type == SDISP || type == LDISP) {
/* TODO: SDISP tag */
unsigned int disp = (cs0 & 0x0fffffff);
unsigned int disp = GET_FIELD(cs0, 0, 27);
/* Calculate a signed displacement in bytes. */
int sdisp = ((int) (disp << 4)) >> 1;
target_ulong tgt = dc->pc + sdisp;

5
target/e2k/translate/win.c
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@ -10,13 +10,16 @@ static inline void gen_abn_inc(DisasContext *dc, TCGCond cond)
TCGv_i32 t0 = tcg_temp_new_i32();
TCGv_i32 t1 = tcg_temp_new_i32();
TCGv_i32 one = tcg_const_i32(1);
TCGv_i32 jmp_cond = tcg_temp_new_i32();
tcg_gen_addi_i32(t0, e2k_cs.rcur, 2);
e2k_gen_wrap_i32(t1, t0, e2k_cs.rsz);
tcg_gen_extrl_i64_i32(jmp_cond, dc->jmp.cond);
tcg_gen_movcond_i32(cond, e2k_cs.rcur,
dc->jmp.cond, one,
jmp_cond, one,
t1, e2k_cs.rcur);
tcg_temp_free_i32(jmp_cond);
tcg_temp_free_i32(one);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t0);