Commit af58f9ca434064ef6193bb7aab0ea6faea5167c0
1 parent
d94536f4
target-mips: optimize gen_movci()
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6956 c046a42c-6fe2-441c-8c8c-71466251a162
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17 additions
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15 deletions
target-mips/translate.c
| @@ -5693,29 +5693,31 @@ static void gen_cp1 (DisasContext *ctx, uint32_t opc, int rt, int fs) | @@ -5693,29 +5693,31 @@ static void gen_cp1 (DisasContext *ctx, uint32_t opc, int rt, int fs) | ||
| 5693 | 5693 | ||
| 5694 | static void gen_movci (DisasContext *ctx, int rd, int rs, int cc, int tf) | 5694 | static void gen_movci (DisasContext *ctx, int rd, int rs, int cc, int tf) |
| 5695 | { | 5695 | { |
| 5696 | - int l1 = gen_new_label(); | ||
| 5697 | - uint32_t ccbit; | 5696 | + int l1; |
| 5698 | TCGCond cond; | 5697 | TCGCond cond; |
| 5699 | - TCGv t0 = tcg_temp_local_new(); | ||
| 5700 | - TCGv_i32 r_tmp = tcg_temp_new_i32(); | 5698 | + TCGv_i32 t0; |
| 5699 | + | ||
| 5700 | + if (rd == 0) { | ||
| 5701 | + /* Treat as NOP. */ | ||
| 5702 | + return; | ||
| 5703 | + } | ||
| 5701 | 5704 | ||
| 5702 | - if (cc) | ||
| 5703 | - ccbit = 1 << (24 + cc); | ||
| 5704 | - else | ||
| 5705 | - ccbit = 1 << 23; | ||
| 5706 | if (tf) | 5705 | if (tf) |
| 5707 | cond = TCG_COND_EQ; | 5706 | cond = TCG_COND_EQ; |
| 5708 | else | 5707 | else |
| 5709 | cond = TCG_COND_NE; | 5708 | cond = TCG_COND_NE; |
| 5710 | 5709 | ||
| 5711 | - gen_load_gpr(t0, rd); | ||
| 5712 | - tcg_gen_andi_i32(r_tmp, fpu_fcr31, ccbit); | ||
| 5713 | - tcg_gen_brcondi_i32(cond, r_tmp, 0, l1); | ||
| 5714 | - tcg_temp_free_i32(r_tmp); | ||
| 5715 | - gen_load_gpr(t0, rs); | 5710 | + l1 = gen_new_label(); |
| 5711 | + t0 = tcg_temp_new_i32(); | ||
| 5712 | + tcg_gen_andi_i32(t0, fpu_fcr31, get_fp_bit(cc)); | ||
| 5713 | + tcg_gen_brcondi_i32(cond, t0, 0, l1); | ||
| 5714 | + if (rs == 0) { | ||
| 5715 | + tcg_gen_movi_tl(cpu_gpr[rd], 0); | ||
| 5716 | + } else { | ||
| 5717 | + tcg_gen_mov_tl(cpu_gpr[rd], cpu_gpr[rs]); | ||
| 5718 | + } | ||
| 5716 | gen_set_label(l1); | 5719 | gen_set_label(l1); |
| 5717 | - gen_store_gpr(t0, rd); | ||
| 5718 | - tcg_temp_free(t0); | 5720 | + tcg_temp_free_i32(t0); |
| 5719 | } | 5721 | } |
| 5720 | 5722 | ||
| 5721 | static inline void gen_movcf_s (int fs, int fd, int cc, int tf) | 5723 | static inline void gen_movcf_s (int fs, int fd, int cc, int tf) |