diff options
author | Laurent Vivier <laurent@vivier.eu> | 2017-06-28 22:42:41 +0200 |
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committer | Laurent Vivier <laurent@vivier.eu> | 2017-06-29 20:29:57 +0200 |
commit | a1e58ddcb3eed7ec4a158512b9dae46f90492c1b (patch) | |
tree | 27f1e5f30712616261968c236c516737ede33e34 /target/m68k | |
parent | 77bdb2292492fafc4bc0fbb4d8c44fdd0ef1fa8e (diff) |
target/m68k: add fmovem
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170628204241.32106-8-laurent@vivier.eu>
Diffstat (limited to 'target/m68k')
-rw-r--r-- | target/m68k/fpu_helper.c | 120 | ||||
-rw-r--r-- | target/m68k/helper.h | 6 | ||||
-rw-r--r-- | target/m68k/translate.c | 93 |
3 files changed, 189 insertions, 30 deletions
diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c index 382fbc1713..bdfc537c68 100644 --- a/target/m68k/fpu_helper.c +++ b/target/m68k/fpu_helper.c @@ -22,6 +22,7 @@ #include "cpu.h" #include "exec/helper-proto.h" #include "exec/exec-all.h" +#include "exec/cpu_ldst.h" /* Undefined offsets may be different on various FPU. * On 68040 they return 0.0 (floatx80_zero) @@ -388,3 +389,122 @@ void HELPER(fconst)(CPUM68KState *env, FPReg *val, uint32_t offset) { val->d = fpu_rom[offset]; } + +typedef int (*float_access)(CPUM68KState *env, uint32_t addr, FPReg *fp, + uintptr_t ra); + +static uint32_t fmovem_predec(CPUM68KState *env, uint32_t addr, uint32_t mask, + float_access access) +{ + uintptr_t ra = GETPC(); + int i, size; + + for (i = 7; i >= 0; i--, mask <<= 1) { + if (mask & 0x80) { + size = access(env, addr, &env->fregs[i], ra); + if ((mask & 0xff) != 0x80) { + addr -= size; + } + } + } + + return addr; +} + +static uint32_t fmovem_postinc(CPUM68KState *env, uint32_t addr, uint32_t mask, + float_access access) +{ + uintptr_t ra = GETPC(); + int i, size; + + for (i = 0; i < 8; i++, mask <<= 1) { + if (mask & 0x80) { + size = access(env, addr, &env->fregs[i], ra); + addr += size; + } + } + + return addr; +} + +static int cpu_ld_floatx80_ra(CPUM68KState *env, uint32_t addr, FPReg *fp, + uintptr_t ra) +{ + uint32_t high; + uint64_t low; + + high = cpu_ldl_data_ra(env, addr, ra); + low = cpu_ldq_data_ra(env, addr + 4, ra); + + fp->l.upper = high >> 16; + fp->l.lower = low; + + return 12; +} + +static int cpu_st_floatx80_ra(CPUM68KState *env, uint32_t addr, FPReg *fp, + uintptr_t ra) +{ + cpu_stl_data_ra(env, addr, fp->l.upper << 16, ra); + cpu_stq_data_ra(env, addr + 4, fp->l.lower, ra); + + return 12; +} + +static int cpu_ld_float64_ra(CPUM68KState *env, uint32_t addr, FPReg *fp, + uintptr_t ra) +{ + uint64_t val; + + val = cpu_ldq_data_ra(env, addr, ra); + fp->d = float64_to_floatx80(*(float64 *)&val, &env->fp_status); + + return 8; +} + +static int cpu_st_float64_ra(CPUM68KState *env, uint32_t addr, FPReg *fp, + uintptr_t ra) +{ + float64 val; + + val = floatx80_to_float64(fp->d, &env->fp_status); + cpu_stq_data_ra(env, addr, *(uint64_t *)&val, ra); + + return 8; +} + +uint32_t HELPER(fmovemx_st_predec)(CPUM68KState *env, uint32_t addr, + uint32_t mask) +{ + return fmovem_predec(env, addr, mask, cpu_st_floatx80_ra); +} + +uint32_t HELPER(fmovemx_st_postinc)(CPUM68KState *env, uint32_t addr, + uint32_t mask) +{ + return fmovem_postinc(env, addr, mask, cpu_st_floatx80_ra); +} + +uint32_t HELPER(fmovemx_ld_postinc)(CPUM68KState *env, uint32_t addr, + uint32_t mask) +{ + return fmovem_postinc(env, addr, mask, cpu_ld_floatx80_ra); +} + +uint32_t HELPER(fmovemd_st_predec)(CPUM68KState *env, uint32_t addr, + uint32_t mask) +{ + return fmovem_predec(env, addr, mask, cpu_st_float64_ra); +} + +uint32_t HELPER(fmovemd_st_postinc)(CPUM68KState *env, uint32_t addr, + uint32_t mask) +{ + return fmovem_postinc(env, addr, mask, cpu_st_float64_ra); +} + +uint32_t HELPER(fmovemd_ld_postinc)(CPUM68KState *env, uint32_t addr, + uint32_t mask) +{ + return fmovem_postinc(env, addr, mask, cpu_ld_float64_ra); +} diff --git a/target/m68k/helper.h b/target/m68k/helper.h index b3968994d8..475a1f2186 100644 --- a/target/m68k/helper.h +++ b/target/m68k/helper.h @@ -54,6 +54,12 @@ DEF_HELPER_FLAGS_3(fcmp, TCG_CALL_NO_RWG, void, env, fp, fp) DEF_HELPER_FLAGS_2(set_fpcr, TCG_CALL_NO_RWG, void, env, i32) DEF_HELPER_FLAGS_2(ftst, TCG_CALL_NO_RWG, void, env, fp) DEF_HELPER_3(fconst, void, env, fp, i32) +DEF_HELPER_3(fmovemx_st_predec, i32, env, i32, i32) +DEF_HELPER_3(fmovemx_st_postinc, i32, env, i32, i32) +DEF_HELPER_3(fmovemx_ld_postinc, i32, env, i32, i32) +DEF_HELPER_3(fmovemd_st_predec, i32, env, i32, i32) +DEF_HELPER_3(fmovemd_st_postinc, i32, env, i32, i32) +DEF_HELPER_3(fmovemd_ld_postinc, i32, env, i32, i32) DEF_HELPER_3(mac_move, void, env, i32, i32) DEF_HELPER_3(macmulf, i64, env, i32, i32) diff --git a/target/m68k/translate.c b/target/m68k/translate.c index 89ac2c7ae3..3a519b790d 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -4505,13 +4505,72 @@ static void gen_op_fmove_fcr(CPUM68KState *env, DisasContext *s, tcg_temp_free_i32(addr); } +static void gen_op_fmovem(CPUM68KState *env, DisasContext *s, + uint32_t insn, uint32_t ext) +{ + int opsize; + TCGv addr, tmp; + int mode = (ext >> 11) & 0x3; + int is_load = ((ext & 0x2000) == 0); + + if (m68k_feature(s->env, M68K_FEATURE_FPU)) { + opsize = OS_EXTENDED; + } else { + opsize = OS_DOUBLE; /* FIXME */ + } + + addr = gen_lea(env, s, insn, opsize); + if (IS_NULL_QREG(addr)) { + gen_addr_fault(s); + return; + } + + tmp = tcg_temp_new(); + if (mode & 0x1) { + /* Dynamic register list */ + tcg_gen_ext8u_i32(tmp, DREG(ext, 4)); + } else { + /* Static register list */ + tcg_gen_movi_i32(tmp, ext & 0xff); + } + + if (!is_load && (mode & 2) == 0) { + /* predecrement addressing mode + * only available to store register to memory + */ + if (opsize == OS_EXTENDED) { + gen_helper_fmovemx_st_predec(tmp, cpu_env, addr, tmp); + } else { + gen_helper_fmovemd_st_predec(tmp, cpu_env, addr, tmp); + } + } else { + /* postincrement addressing mode */ + if (opsize == OS_EXTENDED) { + if (is_load) { + gen_helper_fmovemx_ld_postinc(tmp, cpu_env, addr, tmp); + } else { + gen_helper_fmovemx_st_postinc(tmp, cpu_env, addr, tmp); + } + } else { + if (is_load) { + gen_helper_fmovemd_ld_postinc(tmp, cpu_env, addr, tmp); + } else { + gen_helper_fmovemd_st_postinc(tmp, cpu_env, addr, tmp); + } + } + } + if ((insn & 070) == 030 || (insn & 070) == 040) { + tcg_gen_mov_i32(AREG(insn, 0), tmp); + } + tcg_temp_free(tmp); +} + /* ??? FP exceptions are not implemented. Most exceptions are deferred until immediately before the next FP instruction is executed. */ DISAS_INSN(fpu) { uint16_t ext; int opmode; - TCGv tmp32; int opsize; TCGv_ptr cpu_src, cpu_dest; @@ -4548,36 +4607,10 @@ DISAS_INSN(fpu) return; case 6: /* fmovem */ case 7: - { - TCGv addr; - TCGv_ptr fp; - uint16_t mask; - int i; - if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0) - goto undef; - tmp32 = gen_lea(env, s, insn, OS_LONG); - if (IS_NULL_QREG(tmp32)) { - gen_addr_fault(s); - return; - } - addr = tcg_temp_new_i32(); - tcg_gen_mov_i32(addr, tmp32); - mask = 0x80; - fp = tcg_temp_new_ptr(); - for (i = 0; i < 8; i++) { - if (ext & mask) { - tcg_gen_addi_ptr(fp, cpu_env, - offsetof(CPUM68KState, fregs[i])); - gen_ldst_fp(s, OS_DOUBLE, addr, fp, - (ext & (1 << 13)) ? EA_STORE : EA_LOADS); - if (ext & (mask - 1)) - tcg_gen_addi_i32(addr, addr, 8); - } - mask >>= 1; - } - tcg_temp_free_i32(addr); - tcg_temp_free_ptr(fp); + if ((ext & 0x1000) == 0 && !m68k_feature(s->env, M68K_FEATURE_FPU)) { + goto undef; } + gen_op_fmovem(env, s, insn, ext); return; } if (ext & (1 << 14)) { |