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| author | Leon Alrae | 2014-06-27 09:49:07 +0200 |
|---|---|---|
| committer | Leon Alrae | 2014-10-14 14:28:51 +0200 |
| commit | e7f16abbc5b4058180e14c5912ef319f222b39fc (patch) | |
| tree | 345112b3f7ae3835e8b7f27435573a855d68883c /target-mips/op_helper.c | |
| parent | softfloat: add functions corresponding to IEEE-2008 min/maxNumMag (diff) | |
| download | qemu-e7f16abbc5b4058180e14c5912ef319f222b39fc.tar.gz qemu-e7f16abbc5b4058180e14c5912ef319f222b39fc.tar.xz qemu-e7f16abbc5b4058180e14c5912ef319f222b39fc.zip | |
target-mips: add new Floating Point instructions
In terms of encoding MIPS32R6 MIN.fmt, MAX.fmt, MINA.fmt, MAXA.fmt replaced
MIPS-3D RECIP1, RECIP2, RSQRT1, RSQRT2 instructions.
In R6 all Floating Point instructions are supposed to be IEEE-2008 compliant
i.e. FIR.HAS2008 always 1. However, QEMU softfloat for MIPS has not been
updated yet.
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
Diffstat (limited to 'target-mips/op_helper.c')
| -rw-r--r-- | target-mips/op_helper.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c index c9841e26f8..3f449ae428 100644 --- a/target-mips/op_helper.c +++ b/target-mips/op_helper.c @@ -2809,6 +2809,110 @@ FLOAT_UNOP(abs) FLOAT_UNOP(chs) #undef FLOAT_UNOP +#define FLOAT_FMADDSUB(name, bits, muladd_arg) \ +uint ## bits ## _t helper_float_ ## name (CPUMIPSState *env, \ + uint ## bits ## _t fs, \ + uint ## bits ## _t ft, \ + uint ## bits ## _t fd) \ +{ \ + uint ## bits ## _t fdret; \ + \ + fdret = float ## bits ## _muladd(fs, ft, fd, muladd_arg, \ + &env->active_fpu.fp_status); \ + update_fcr31(env, GETPC()); \ + return fdret; \ +} + +FLOAT_FMADDSUB(maddf_s, 32, 0) +FLOAT_FMADDSUB(maddf_d, 64, 0) +FLOAT_FMADDSUB(msubf_s, 32, float_muladd_negate_product) +FLOAT_FMADDSUB(msubf_d, 64, float_muladd_negate_product) +#undef FLOAT_FMADDSUB + +#define FLOAT_MINMAX(name, bits, minmaxfunc) \ +uint ## bits ## _t helper_float_ ## name (CPUMIPSState *env, \ + uint ## bits ## _t fs, \ + uint ## bits ## _t ft) \ +{ \ + uint ## bits ## _t fdret; \ + \ + fdret = float ## bits ## _ ## minmaxfunc(fs, ft, \ + &env->active_fpu.fp_status); \ + update_fcr31(env, GETPC()); \ + return fdret; \ +} + +FLOAT_MINMAX(max_s, 32, maxnum) +FLOAT_MINMAX(max_d, 64, maxnum) +FLOAT_MINMAX(maxa_s, 32, maxnummag) +FLOAT_MINMAX(maxa_d, 64, maxnummag) + +FLOAT_MINMAX(min_s, 32, minnum) +FLOAT_MINMAX(min_d, 64, minnum) +FLOAT_MINMAX(mina_s, 32, minnummag) +FLOAT_MINMAX(mina_d, 64, minnummag) +#undef FLOAT_MINMAX + +#define FLOAT_RINT(name, bits) \ +uint ## bits ## _t helper_float_ ## name (CPUMIPSState *env, \ + uint ## bits ## _t fs) \ +{ \ + uint ## bits ## _t fdret; \ + \ + fdret = float ## bits ## _round_to_int(fs, &env->active_fpu.fp_status); \ + update_fcr31(env, GETPC()); \ + return fdret; \ +} + +FLOAT_RINT(rint_s, 32) +FLOAT_RINT(rint_d, 64) +#undef FLOAT_RINT + +#define FLOAT_CLASS_SIGNALING_NAN 0x001 +#define FLOAT_CLASS_QUIET_NAN 0x002 +#define FLOAT_CLASS_NEGATIVE_INFINITY 0x004 +#define FLOAT_CLASS_NEGATIVE_NORMAL 0x008 +#define FLOAT_CLASS_NEGATIVE_SUBNORMAL 0x010 +#define FLOAT_CLASS_NEGATIVE_ZERO 0x020 +#define FLOAT_CLASS_POSITIVE_INFINITY 0x040 +#define FLOAT_CLASS_POSITIVE_NORMAL 0x080 +#define FLOAT_CLASS_POSITIVE_SUBNORMAL 0x100 +#define FLOAT_CLASS_POSITIVE_ZERO 0x200 + +#define FLOAT_CLASS(name, bits) \ +uint ## bits ## _t helper_float_ ## name (uint ## bits ## _t arg) \ +{ \ + if (float ## bits ## _is_signaling_nan(arg)) { \ + return FLOAT_CLASS_SIGNALING_NAN; \ + } else if (float ## bits ## _is_quiet_nan(arg)) { \ + return FLOAT_CLASS_QUIET_NAN; \ + } else if (float ## bits ## _is_neg(arg)) { \ + if (float ## bits ## _is_infinity(arg)) { \ + return FLOAT_CLASS_NEGATIVE_INFINITY; \ + } else if (float ## bits ## _is_zero(arg)) { \ + return FLOAT_CLASS_NEGATIVE_ZERO; \ + } else if (float ## bits ## _is_zero_or_denormal(arg)) { \ + return FLOAT_CLASS_NEGATIVE_SUBNORMAL; \ + } else { \ + return FLOAT_CLASS_NEGATIVE_NORMAL; \ + } \ + } else { \ + if (float ## bits ## _is_infinity(arg)) { \ + return FLOAT_CLASS_POSITIVE_INFINITY; \ + } else if (float ## bits ## _is_zero(arg)) { \ + return FLOAT_CLASS_POSITIVE_ZERO; \ + } else if (float ## bits ## _is_zero_or_denormal(arg)) { \ + return FLOAT_CLASS_POSITIVE_SUBNORMAL; \ + } else { \ + return FLOAT_CLASS_POSITIVE_NORMAL; \ + } \ + } \ +} + +FLOAT_CLASS(class_s, 32) +FLOAT_CLASS(class_d, 64) +#undef FLOAT_CLASS + /* MIPS specific unary operations */ uint64_t helper_float_recip_d(CPUMIPSState *env, uint64_t fdt0) { |