diff options
| author | Laurent Vivier <laurent@vivier.eu> | 2017-06-28 22:42:36 +0200 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2017-06-29 20:26:01 +0200 |
| commit | 9d403660d91229922c2786e81c23cc9dd8e644f1 (patch) | |
| tree | 3f990f3d848ae00f9269e9c011dd18b1fc083647 /target/m68k | |
| parent | dd337bf86214e2436833d9442c995df95b136190 (diff) | |
target/m68k: add fmovecr
fmovecr moves a floating point constant from the
FPU ROM to a floating point register.
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170628204241.32106-3-laurent@vivier.eu>
Diffstat (limited to 'target/m68k')
| -rw-r--r-- | target/m68k/fpu_helper.c | 34 | ||||
| -rw-r--r-- | target/m68k/helper.h | 1 | ||||
| -rw-r--r-- | target/m68k/translate.c | 13 |
3 files changed, 47 insertions, 1 deletions
diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c index a9e17f5e98..4c14a1fc62 100644 --- a/target/m68k/fpu_helper.c +++ b/target/m68k/fpu_helper.c @@ -23,6 +23,35 @@ #include "exec/helper-proto.h" #include "exec/exec-all.h" +/* Undefined offsets may be different on various FPU. + * On 68040 they return 0.0 (floatx80_zero) + */ + +static const floatx80 fpu_rom[128] = { + [0x00] = floatx80_pi, /* Pi */ + [0x0b] = make_floatx80(0x3ffd, 0x9a209a84fbcff798ULL), /* Log10(2) */ + [0x0c] = make_floatx80(0x4000, 0xadf85458a2bb4a9aULL), /* e */ + [0x0d] = make_floatx80(0x3fff, 0xb8aa3b295c17f0bcULL), /* Log2(e) */ + [0x0e] = make_floatx80(0x3ffd, 0xde5bd8a937287195ULL), /* Log10(e) */ + [0x0f] = floatx80_zero, /* Zero */ + [0x30] = floatx80_ln2, /* ln(2) */ + [0x31] = make_floatx80(0x4000, 0x935d8dddaaa8ac17ULL), /* ln(10) */ + [0x32] = floatx80_one, /* 10^0 */ + [0x33] = make_floatx80(0x4002, 0xa000000000000000ULL), /* 10^1 */ + [0x34] = make_floatx80(0x4005, 0xc800000000000000ULL), /* 10^2 */ + [0x35] = make_floatx80(0x400c, 0x9c40000000000000ULL), /* 10^4 */ + [0x36] = make_floatx80(0x4019, 0xbebc200000000000ULL), /* 10^8 */ + [0x37] = make_floatx80(0x4034, 0x8e1bc9bf04000000ULL), /* 10^16 */ + [0x38] = make_floatx80(0x4069, 0x9dc5ada82b70b59eULL), /* 10^32 */ + [0x39] = make_floatx80(0x40d3, 0xc2781f49ffcfa6d5ULL), /* 10^64 */ + [0x3a] = make_floatx80(0x41a8, 0x93ba47c980e98ce0ULL), /* 10^128 */ + [0x3b] = make_floatx80(0x4351, 0xaa7eebfb9df9de8eULL), /* 10^256 */ + [0x3c] = make_floatx80(0x46a3, 0xe319a0aea60e91c7ULL), /* 10^512 */ + [0x3d] = make_floatx80(0x4d48, 0xc976758681750c17ULL), /* 10^1024 */ + [0x3e] = make_floatx80(0x5a92, 0x9e8b3b5dc53d5de5ULL), /* 10^2048 */ + [0x3f] = make_floatx80(0x7525, 0xc46052028a20979bULL), /* 10^4096 */ +}; + int32_t HELPER(reds32)(CPUM68KState *env, FPReg *val) { return floatx80_to_int32(val->d, &env->fp_status); @@ -204,3 +233,8 @@ void HELPER(ftst)(CPUM68KState *env, FPReg *val) } env->fpsr = (env->fpsr & ~FPSR_CC_MASK) | cc; } + +void HELPER(fconst)(CPUM68KState *env, FPReg *val, uint32_t offset) +{ + val->d = fpu_rom[offset]; +} diff --git a/target/m68k/helper.h b/target/m68k/helper.h index 98cbf187d2..d6e80e40ac 100644 --- a/target/m68k/helper.h +++ b/target/m68k/helper.h @@ -35,6 +35,7 @@ DEF_HELPER_4(fdiv, void, env, fp, fp, fp) 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(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 5f4bedc037..5b93d3ff60 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -4518,10 +4518,21 @@ DISAS_INSN(fpu) ext = read_im16(env, s); opmode = ext & 0x7f; switch ((ext >> 13) & 7) { - case 0: case 2: + case 0: break; case 1: goto undef; + case 2: + if (insn == 0xf200 && (ext & 0xfc00) == 0x5c00) { + /* fmovecr */ + TCGv rom_offset = tcg_const_i32(opmode); + cpu_dest = gen_fp_ptr(REG(ext, 7)); + gen_helper_fconst(cpu_env, cpu_dest, rom_offset); + tcg_temp_free_ptr(cpu_dest); + tcg_temp_free(rom_offset); + return; + } + break; case 3: /* fmove out */ cpu_src = gen_fp_ptr(REG(ext, 7)); opsize = ext_opsize(ext, 10); |