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target-sparc: Elide duplicate updates to fprs 

Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-09-09 11:56:38 -07:00
parent 02c79d7885
commit f9c816c00c
1 changed files with 27 additions and 18 deletions
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45
target-sparc/translate.c
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@ -83,6 +83,7 @@ typedef struct DisasContext {
int n_t32;
int n_ttl;
#ifdef TARGET_SPARC64
int fprs_dirty;
int asi;
#endif
} DisasContext;
@ -140,10 +141,16 @@ static inline TCGv get_temp_tl(DisasContext *dc)
return t;
}
static inline void gen_update_fprs_dirty(int rd)
static inline void gen_update_fprs_dirty(DisasContext *dc, int rd)
{
#if defined(TARGET_SPARC64)
tcg_gen_ori_i32(cpu_fprs, cpu_fprs, (rd < 32) ? 1 : 2);
int bit = (rd < 32) ? 1 : 2;
/* If we know we've already set this bit within the TB,
we can avoid setting it again. */
if (!(dc->fprs_dirty & bit)) {
dc->fprs_dirty |= bit;
tcg_gen_ori_i32(cpu_fprs, cpu_fprs, bit);
}
#endif
}
@ -185,7 +192,7 @@ static void gen_store_fpr_F(DisasContext *dc, unsigned int dst, TCGv_i32 v)
tcg_gen_deposit_i64(cpu_fpr[dst / 2], cpu_fpr[dst / 2], t,
(dst & 1 ? 0 : 32), 32);
#endif
gen_update_fprs_dirty(dst);
gen_update_fprs_dirty(dc, dst);
}
static TCGv_i32 gen_dest_fpr_F(DisasContext *dc)
@ -203,7 +210,7 @@ static void gen_store_fpr_D(DisasContext *dc, unsigned int dst, TCGv_i64 v)
{
dst = DFPREG(dst);
tcg_gen_mov_i64(cpu_fpr[dst / 2], v);
gen_update_fprs_dirty(dst);
gen_update_fprs_dirty(dc, dst);
}
static TCGv_i64 gen_dest_fpr_D(DisasContext *dc, unsigned int dst)
@ -236,14 +243,14 @@ static void gen_op_store_QT0_fpr(unsigned int dst)
}
#ifdef TARGET_SPARC64
static void gen_move_Q(unsigned int rd, unsigned int rs)
static void gen_move_Q(DisasContext *dc, unsigned int rd, unsigned int rs)
{
rd = QFPREG(rd);
rs = QFPREG(rs);
tcg_gen_mov_i64(cpu_fpr[rd / 2], cpu_fpr[rs / 2]);
tcg_gen_mov_i64(cpu_fpr[rd / 2 + 1], cpu_fpr[rs / 2 + 1]);
gen_update_fprs_dirty(rd);
gen_update_fprs_dirty(dc, rd);
}
#endif
@ -1834,7 +1841,7 @@ static inline void gen_fop_QQ(DisasContext *dc, int rd, int rs,
gen_helper_check_ieee_exceptions(cpu_fsr, cpu_env);
gen_op_store_QT0_fpr(QFPREG(rd));
gen_update_fprs_dirty(QFPREG(rd));
gen_update_fprs_dirty(dc, QFPREG(rd));
}
#ifdef TARGET_SPARC64
@ -1846,7 +1853,7 @@ static inline void gen_ne_fop_QQ(DisasContext *dc, int rd, int rs,
gen(cpu_env);
gen_op_store_QT0_fpr(QFPREG(rd));
gen_update_fprs_dirty(QFPREG(rd));
gen_update_fprs_dirty(dc, QFPREG(rd));
}
#endif
@ -1860,7 +1867,7 @@ static inline void gen_fop_QQQ(DisasContext *dc, int rd, int rs1, int rs2,
gen_helper_check_ieee_exceptions(cpu_fsr, cpu_env);
gen_op_store_QT0_fpr(QFPREG(rd));
gen_update_fprs_dirty(QFPREG(rd));
gen_update_fprs_dirty(dc, QFPREG(rd));
}
static inline void gen_fop_DFF(DisasContext *dc, int rd, int rs1, int rs2,
@ -1891,7 +1898,7 @@ static inline void gen_fop_QDD(DisasContext *dc, int rd, int rs1, int rs2,
gen_helper_check_ieee_exceptions(cpu_fsr, cpu_env);
gen_op_store_QT0_fpr(QFPREG(rd));
gen_update_fprs_dirty(QFPREG(rd));
gen_update_fprs_dirty(dc, QFPREG(rd));
}
#ifdef TARGET_SPARC64
@ -1978,7 +1985,7 @@ static inline void gen_ne_fop_QF(DisasContext *dc, int rd, int rs,
gen(cpu_env, src);
gen_op_store_QT0_fpr(QFPREG(rd));
gen_update_fprs_dirty(QFPREG(rd));
gen_update_fprs_dirty(dc, QFPREG(rd));
}
static inline void gen_ne_fop_QD(DisasContext *dc, int rd, int rs,
@ -1991,7 +1998,7 @@ static inline void gen_ne_fop_QD(DisasContext *dc, int rd, int rs,
gen(cpu_env, src);
gen_op_store_QT0_fpr(QFPREG(rd));
gen_update_fprs_dirty(QFPREG(rd));
gen_update_fprs_dirty(dc, QFPREG(rd));
}
/* asi moves */
@ -2790,7 +2797,7 @@ static void gen_fmovq(DisasContext *dc, DisasCompare *cmp, int rd, int rs)
tcg_gen_movcond_i64(cmp->cond, cpu_fpr[qd / 2 + 1], cmp->c1, cmp->c2,
cpu_fpr[qs / 2 + 1], cpu_fpr[qd / 2 + 1]);
gen_update_fprs_dirty(qd);
gen_update_fprs_dirty(dc, qd);
}
#ifndef CONFIG_USER_ONLY
@ -3588,7 +3595,7 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
break;
case 0x3: /* V9 fmovq */
CHECK_FPU_FEATURE(dc, FLOAT128);
gen_move_Q(rd, rs2);
gen_move_Q(dc, rd, rs2);
break;
case 0x6: /* V9 fnegd */
gen_ne_fop_DD(dc, rd, rs2, gen_helper_fnegd);
@ -4138,6 +4145,7 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
case 0x6: /* V9 wrfprs */
tcg_gen_xor_tl(cpu_tmp0, cpu_src1, cpu_src2);
tcg_gen_trunc_tl_i32(cpu_fprs, cpu_tmp0);
dc->fprs_dirty = 0;
save_state(dc);
gen_op_next_insn();
tcg_gen_exit_tb(0);
@ -5242,14 +5250,14 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
goto jmp_insn;
}
gen_ldf_asi(dc, cpu_addr, insn, 4, rd);
gen_update_fprs_dirty(rd);
gen_update_fprs_dirty(dc, rd);
goto skip_move;
case 0x33: /* V9 lddfa */
if (gen_trap_ifnofpu(dc)) {
goto jmp_insn;
}
gen_ldf_asi(dc, cpu_addr, insn, 8, DFPREG(rd));
gen_update_fprs_dirty(DFPREG(rd));
gen_update_fprs_dirty(dc, DFPREG(rd));
goto skip_move;
case 0x3d: /* V9 prefetcha, no effect */
goto skip_move;
@ -5259,7 +5267,7 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
goto jmp_insn;
}
gen_ldf_asi(dc, cpu_addr, insn, 16, QFPREG(rd));
gen_update_fprs_dirty(QFPREG(rd));
gen_update_fprs_dirty(dc, QFPREG(rd));
goto skip_move;
#endif
default:
@ -5311,7 +5319,7 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
gen_helper_ldqf(cpu_env, cpu_addr, r_const);
tcg_temp_free_i32(r_const);
gen_op_store_QT0_fpr(QFPREG(rd));
gen_update_fprs_dirty(QFPREG(rd));
gen_update_fprs_dirty(dc, QFPREG(rd));
}
break;
case 0x23: /* lddf, load double fpreg */
@ -5579,6 +5587,7 @@ void gen_intermediate_code(CPUSPARCState * env, TranslationBlock * tb)
dc->address_mask_32bit = tb_am_enabled(tb->flags);
dc->singlestep = (cs->singlestep_enabled || singlestep);
#ifdef TARGET_SPARC64
dc->fprs_dirty = 0;
dc->asi = (tb->flags >> TB_FLAG_ASI_SHIFT) & 0xff;
#endif