diff options
| -rw-r--r-- | target-sparc/cpu.h | 2 | ||||
| -rw-r--r-- | target-sparc/op.c | 28 | ||||
| -rw-r--r-- | target-sparc/translate.c | 56 |
3 files changed, 56 insertions, 30 deletions
diff --git a/target-sparc/cpu.h b/target-sparc/cpu.h index ae47a1b..a575bfd 100644 --- a/target-sparc/cpu.h +++ b/target-sparc/cpu.h @@ -186,7 +186,7 @@ typedef struct CPUSPARCState { target_ulong y; /* multiply/divide register */ /* emulator internal flags handling */ - target_ulong cc_src; + target_ulong cc_src, cc_src2; target_ulong cc_dst; uint32_t psr; /* processor state register */ diff --git a/target-sparc/op.c b/target-sparc/op.c index 921699e..f4f05d2 100644 --- a/target-sparc/op.c +++ b/target-sparc/op.c @@ -195,34 +195,6 @@ void OPPROTO op_smul_T1_T0(void) env->y = res >> 32; } -void OPPROTO op_mulscc_T1_T0(void) -{ - unsigned int b1, N, V, b2; - target_ulong src1; - - N = FLAG_SET(PSR_NEG); - V = FLAG_SET(PSR_OVF); - b1 = N ^ V; - b2 = T0 & 1; - T0 = (b1 << 31) | (T0 >> 1); - if (!(env->y & 1)) - T1 = 0; - /* do addition and update flags */ - src1 = T0; - T0 += T1; - env->psr = 0; - if (!T0) - env->psr |= PSR_ZERO; - if ((int32_t) T0 < 0) - env->psr |= PSR_NEG; - if (T0 < src1) - env->psr |= PSR_CARRY; - if (((src1 ^ T1 ^ -1) & (src1 ^ T0)) & (1 << 31)) - env->psr |= PSR_OVF; - env->y = (b2 << 31) | (env->y >> 1); - FORCE_RET(); -} - void OPPROTO op_udiv_T1_T0(void) { uint64_t x0; diff --git a/target-sparc/translate.c b/target-sparc/translate.c index 72dd9f2..e819c6c 100644 --- a/target-sparc/translate.c +++ b/target-sparc/translate.c @@ -46,7 +46,7 @@ according to jump_pc[T2] */ /* global register indexes */ -static TCGv cpu_env, cpu_T[3], cpu_regwptr, cpu_cc_src, cpu_cc_dst; +static TCGv cpu_env, cpu_T[3], cpu_regwptr, cpu_cc_src, cpu_cc_src2, cpu_cc_dst; static TCGv cpu_psr, cpu_fsr, cpu_gregs[8]; #ifdef TARGET_SPARC64 static TCGv cpu_xcc; @@ -710,6 +710,57 @@ static inline void gen_op_tsub_T1_T0_ccTV(void) gen_cc_C_sub(cpu_cc_src, cpu_T[1]); } +static inline void gen_op_mulscc_T1_T0(void) +{ + TCGv r_temp; + int l1, l2; + + l1 = gen_new_label(); + l2 = gen_new_label(); + r_temp = tcg_temp_new(TCG_TYPE_TL); + + /* old op: + if (!(env->y & 1)) + T1 = 0; + */ + tcg_gen_ld_i32(r_temp, cpu_env, offsetof(CPUSPARCState, y)); + tcg_gen_andi_i32(r_temp, r_temp, 0x1); + tcg_gen_brcond_i32(TCG_COND_EQ, r_temp, tcg_const_tl(0), l1); + tcg_gen_mov_tl(cpu_cc_src2, cpu_T[1]); + gen_op_jmp_label(l2); + gen_set_label(l1); + tcg_gen_movi_tl(cpu_cc_src2, 0); + gen_set_label(l2); + + // b2 = T0 & 1; + // env->y = (b2 << 31) | (env->y >> 1); + tcg_gen_shli_i32(r_temp, cpu_T[0], 31); + tcg_gen_ld_i32(cpu_tmp0, cpu_env, offsetof(CPUSPARCState, y)); + tcg_gen_shri_i32(cpu_tmp0, cpu_tmp0, 1); + tcg_gen_or_i32(cpu_tmp0, cpu_tmp0, r_temp); + tcg_gen_st_i32(cpu_tmp0, cpu_env, offsetof(CPUSPARCState, y)); + + // b1 = N ^ V; + gen_mov_reg_N(cpu_tmp0, cpu_psr); + gen_mov_reg_V(r_temp, cpu_psr); + tcg_gen_xor_tl(cpu_tmp0, cpu_tmp0, r_temp); + + // T0 = (b1 << 31) | (T0 >> 1); + // src1 = T0; + tcg_gen_shli_tl(cpu_tmp0, cpu_tmp0, 31); + tcg_gen_shri_tl(cpu_cc_src, cpu_T[0], 1); + tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, cpu_tmp0); + + /* do addition and update flags */ + tcg_gen_add_tl(cpu_T[0], cpu_cc_src, cpu_cc_src2); + tcg_gen_discard_tl(r_temp); + + gen_cc_clear(); + gen_cc_NZ(cpu_T[0]); + gen_cc_V_add(cpu_T[0], cpu_cc_src, cpu_cc_src2); + gen_cc_C_add(cpu_T[0], cpu_cc_src); +} + #ifdef TARGET_SPARC64 static inline void gen_trap_ifdivzero_i64(TCGv divisor) { @@ -4627,6 +4678,9 @@ CPUSPARCState *cpu_sparc_init(const char *cpu_model) cpu_cc_src = tcg_global_mem_new(TCG_TYPE_TL, TCG_AREG0, offsetof(CPUState, cc_src), "cc_src"); + cpu_cc_src2 = tcg_global_mem_new(TCG_TYPE_TL, TCG_AREG0, + offsetof(CPUState, cc_src2), + "cc_src2"); cpu_cc_dst = tcg_global_mem_new(TCG_TYPE_TL, TCG_AREG0, offsetof(CPUState, cc_dst), "cc_dst"); |