diff options
author | Richard Henderson <rth@twiddle.net> | 2012-10-05 16:55:05 -0700 |
---|---|---|
committer | Blue Swirl <blauwirbel@gmail.com> | 2012-10-07 16:39:33 +0000 |
commit | a2ea4aa9898086c1e45e1db9b5f94d16dbf0762e (patch) | |
tree | 3c74fb53034a28e2e6c77a69373cc050a07cc403 | |
parent | bd49ed41ebe518c79bd52e46ce5b9cf278f8a2af (diff) | |
download | qemu-a2ea4aa9898086c1e45e1db9b5f94d16dbf0762e.zip qemu-a2ea4aa9898086c1e45e1db9b5f94d16dbf0762e.tar.gz qemu-a2ea4aa9898086c1e45e1db9b5f94d16dbf0762e.tar.bz2 |
target-sparc: Move taddcctv and tsubcctv out of line
The branches around the exception are maintaining an otherwise
unnecessary use of local temps for the cpu destination.
Note that gen_op_t{add,sub}_cc were identical to gen_op_{add,sub}_cc.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
-rw-r--r-- | target-sparc/helper.c | 58 | ||||
-rw-r--r-- | target-sparc/helper.h | 2 | ||||
-rw-r--r-- | target-sparc/translate.c | 108 |
3 files changed, 66 insertions, 102 deletions
diff --git a/target-sparc/helper.c b/target-sparc/helper.c index 4555d2b..556ac28 100644 --- a/target-sparc/helper.c +++ b/target-sparc/helper.c @@ -167,3 +167,61 @@ uint64_t helper_udivx(CPUSPARCState *env, uint64_t a, uint64_t b) return a / b; } #endif + +target_ulong helper_taddcctv(CPUSPARCState *env, target_ulong src1, + target_ulong src2) +{ + target_ulong dst; + + /* Tag overflow occurs if either input has bits 0 or 1 set. */ + if ((src1 | src2) & 3) { + goto tag_overflow; + } + + dst = src1 + src2; + + /* Tag overflow occurs if the addition overflows. */ + if (~(src1 ^ src2) & (src1 ^ dst) & (1u << 31)) { + goto tag_overflow; + } + + /* Only modify the CC after any exceptions have been generated. */ + env->cc_op = CC_OP_TADDTV; + env->cc_src = src1; + env->cc_src2 = src2; + env->cc_dst = dst; + return dst; + + tag_overflow: + cpu_restore_state2(env, GETPC()); + helper_raise_exception(env, TT_TOVF); +} + +target_ulong helper_tsubcctv(CPUSPARCState *env, target_ulong src1, + target_ulong src2) +{ + target_ulong dst; + + /* Tag overflow occurs if either input has bits 0 or 1 set. */ + if ((src1 | src2) & 3) { + goto tag_overflow; + } + + dst = src1 - src2; + + /* Tag overflow occurs if the subtraction overflows. */ + if ((src1 ^ src2) & (src1 ^ dst) & (1u << 31)) { + goto tag_overflow; + } + + /* Only modify the CC after any exceptions have been generated. */ + env->cc_op = CC_OP_TSUBTV; + env->cc_src = src1; + env->cc_src2 = src2; + env->cc_dst = dst; + return dst; + + tag_overflow: + cpu_restore_state2(env, GETPC()); + helper_raise_exception(env, TT_TOVF); +} diff --git a/target-sparc/helper.h b/target-sparc/helper.h index 827df67..e1ae3c7 100644 --- a/target-sparc/helper.h +++ b/target-sparc/helper.h @@ -38,6 +38,8 @@ DEF_HELPER_3(udiv, tl, env, tl, tl) DEF_HELPER_3(udiv_cc, tl, env, tl, tl) DEF_HELPER_3(sdiv, tl, env, tl, tl) DEF_HELPER_3(sdiv_cc, tl, env, tl, tl) +DEF_HELPER_3(taddcctv, tl, env, tl, tl) +DEF_HELPER_3(tsubcctv, tl, env, tl, tl) #ifdef TARGET_SPARC64 DEF_HELPER_3(sdivx, s64, env, s64, s64) DEF_HELPER_3(udivx, i64, env, i64, i64) diff --git a/target-sparc/translate.c b/target-sparc/translate.c index 111c025..98efb84 100644 --- a/target-sparc/translate.c +++ b/target-sparc/translate.c @@ -336,43 +336,6 @@ static inline void gen_mov_reg_C(TCGv reg, TCGv_i32 src) tcg_gen_andi_tl(reg, reg, 0x1); } -static inline void gen_add_tv(TCGv dst, TCGv src1, TCGv src2) -{ - TCGv r_temp; - TCGv_i32 r_const; - int l1; - - l1 = gen_new_label(); - - r_temp = tcg_temp_new(); - tcg_gen_xor_tl(r_temp, src1, src2); - tcg_gen_not_tl(r_temp, r_temp); - tcg_gen_xor_tl(cpu_tmp0, src1, dst); - tcg_gen_and_tl(r_temp, r_temp, cpu_tmp0); - tcg_gen_andi_tl(r_temp, r_temp, (1ULL << 31)); - tcg_gen_brcondi_tl(TCG_COND_EQ, r_temp, 0, l1); - r_const = tcg_const_i32(TT_TOVF); - gen_helper_raise_exception(cpu_env, r_const); - tcg_temp_free_i32(r_const); - gen_set_label(l1); - tcg_temp_free(r_temp); -} - -static inline void gen_tag_tv(TCGv src1, TCGv src2) -{ - int l1; - TCGv_i32 r_const; - - l1 = gen_new_label(); - tcg_gen_or_tl(cpu_tmp0, src1, src2); - tcg_gen_andi_tl(cpu_tmp0, cpu_tmp0, 0x3); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_tmp0, 0, l1); - r_const = tcg_const_i32(TT_TOVF); - gen_helper_raise_exception(cpu_env, r_const); - tcg_temp_free_i32(r_const); - gen_set_label(l1); -} - static inline void gen_op_addi_cc(TCGv dst, TCGv src1, target_long src2) { tcg_gen_mov_tl(cpu_cc_src, src1); @@ -517,45 +480,6 @@ static void gen_op_addx_int(DisasContext *dc, TCGv dst, TCGv src1, } } -static inline void gen_op_tadd_cc(TCGv dst, TCGv src1, TCGv src2) -{ - tcg_gen_mov_tl(cpu_cc_src, src1); - tcg_gen_mov_tl(cpu_cc_src2, src2); - tcg_gen_add_tl(cpu_cc_dst, cpu_cc_src, cpu_cc_src2); - tcg_gen_mov_tl(dst, cpu_cc_dst); -} - -static inline void gen_op_tadd_ccTV(TCGv dst, TCGv src1, TCGv src2) -{ - tcg_gen_mov_tl(cpu_cc_src, src1); - tcg_gen_mov_tl(cpu_cc_src2, src2); - gen_tag_tv(cpu_cc_src, cpu_cc_src2); - tcg_gen_add_tl(cpu_cc_dst, cpu_cc_src, cpu_cc_src2); - gen_add_tv(cpu_cc_dst, cpu_cc_src, cpu_cc_src2); - tcg_gen_mov_tl(dst, cpu_cc_dst); -} - -static inline void gen_sub_tv(TCGv dst, TCGv src1, TCGv src2) -{ - TCGv r_temp; - TCGv_i32 r_const; - int l1; - - l1 = gen_new_label(); - - r_temp = tcg_temp_new(); - tcg_gen_xor_tl(r_temp, src1, src2); - tcg_gen_xor_tl(cpu_tmp0, src1, dst); - tcg_gen_and_tl(r_temp, r_temp, cpu_tmp0); - tcg_gen_andi_tl(r_temp, r_temp, (1ULL << 31)); - tcg_gen_brcondi_tl(TCG_COND_EQ, r_temp, 0, l1); - r_const = tcg_const_i32(TT_TOVF); - gen_helper_raise_exception(cpu_env, r_const); - tcg_temp_free_i32(r_const); - gen_set_label(l1); - tcg_temp_free(r_temp); -} - static inline void gen_op_subi_cc(TCGv dst, TCGv src1, target_long src2, DisasContext *dc) { tcg_gen_mov_tl(cpu_cc_src, src1); @@ -656,24 +580,6 @@ static void gen_op_subx_int(DisasContext *dc, TCGv dst, TCGv src1, } } -static inline void gen_op_tsub_cc(TCGv dst, TCGv src1, TCGv src2) -{ - tcg_gen_mov_tl(cpu_cc_src, src1); - tcg_gen_mov_tl(cpu_cc_src2, src2); - tcg_gen_sub_tl(cpu_cc_dst, cpu_cc_src, cpu_cc_src2); - tcg_gen_mov_tl(dst, cpu_cc_dst); -} - -static inline void gen_op_tsub_ccTV(TCGv dst, TCGv src1, TCGv src2) -{ - tcg_gen_mov_tl(cpu_cc_src, src1); - tcg_gen_mov_tl(cpu_cc_src2, src2); - gen_tag_tv(cpu_cc_src, cpu_cc_src2); - tcg_gen_sub_tl(cpu_cc_dst, cpu_cc_src, cpu_cc_src2); - gen_sub_tv(cpu_cc_dst, cpu_cc_src, cpu_cc_src2); - tcg_gen_mov_tl(dst, cpu_cc_dst); -} - static inline void gen_op_mulscc(TCGv dst, TCGv src1, TCGv src2) { TCGv r_temp; @@ -3602,29 +3508,27 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn) cpu_src2 = get_src2(insn, cpu_src2); switch (xop) { case 0x20: /* taddcc */ - gen_op_tadd_cc(cpu_dst, cpu_src1, cpu_src2); + gen_op_add_cc(cpu_dst, cpu_src1, cpu_src2); gen_movl_TN_reg(rd, cpu_dst); tcg_gen_movi_i32(cpu_cc_op, CC_OP_TADD); dc->cc_op = CC_OP_TADD; break; case 0x21: /* tsubcc */ - gen_op_tsub_cc(cpu_dst, cpu_src1, cpu_src2); + gen_op_sub_cc(cpu_dst, cpu_src1, cpu_src2); gen_movl_TN_reg(rd, cpu_dst); tcg_gen_movi_i32(cpu_cc_op, CC_OP_TSUB); dc->cc_op = CC_OP_TSUB; break; case 0x22: /* taddcctv */ - save_state(dc); - gen_op_tadd_ccTV(cpu_dst, cpu_src1, cpu_src2); + gen_helper_taddcctv(cpu_dst, cpu_env, + cpu_src1, cpu_src2); gen_movl_TN_reg(rd, cpu_dst); - tcg_gen_movi_i32(cpu_cc_op, CC_OP_TADDTV); dc->cc_op = CC_OP_TADDTV; break; case 0x23: /* tsubcctv */ - save_state(dc); - gen_op_tsub_ccTV(cpu_dst, cpu_src1, cpu_src2); + gen_helper_tsubcctv(cpu_dst, cpu_env, + cpu_src1, cpu_src2); gen_movl_TN_reg(rd, cpu_dst); - tcg_gen_movi_i32(cpu_cc_op, CC_OP_TSUBTV); dc->cc_op = CC_OP_TSUBTV; break; case 0x24: /* mulscc */ |