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| 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/fpu_helper.c | |
| parent | dd337bf86214e2436833d9442c995df95b136190 (diff) | |
| download | qemu-9d403660d91229922c2786e81c23cc9dd8e644f1.zip qemu-9d403660d91229922c2786e81c23cc9dd8e644f1.tar.gz qemu-9d403660d91229922c2786e81c23cc9dd8e644f1.tar.bz2 | |
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/fpu_helper.c')
| -rw-r--r-- | target/m68k/fpu_helper.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c index a9e17f5..4c14a1f 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]; +} |