diff options
| author | Lucas Mateus Castro (alqotel) <lucas.araujo@eldorado.org.br> | 2022-08-05 11:15:21 -0300 |
|---|---|---|
| committer | Daniel Henrique Barboza <danielhb413@gmail.com> | 2022-08-31 14:08:05 -0300 |
| commit | c40da5c6fb6dd243e906900de1d22cf20e32a8cd (patch) | |
| tree | 8cb7144ea5d9f025bcc0fb5d574abf5a544046f9 /fpu/softfloat.c | |
| parent | 0bf4d77e5922128506a3495d72ee9f432726c085 (diff) | |
fpu: Add rebias bool, value and operation
Added the possibility of recalculating a result if it overflows or
underflows, if the result overflow and the rebias bool is true then the
intermediate result should have 3/4 of the total range subtracted from
the exponent. The same for underflow but it should be added to the
exponent of the intermediate number instead.
Signed-off-by: Lucas Mateus Castro (alqotel) <lucas.araujo@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220805141522.412864-2-lucas.araujo@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Diffstat (limited to 'fpu/softfloat.c')
| -rw-r--r-- | fpu/softfloat.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 4a871ef2a1..c7454c3eb1 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -521,6 +521,7 @@ typedef struct { typedef struct { int exp_size; int exp_bias; + int exp_re_bias; int exp_max; int frac_size; int frac_shift; @@ -532,6 +533,7 @@ typedef struct { #define FLOAT_PARAMS_(E) \ .exp_size = E, \ .exp_bias = ((1 << E) - 1) >> 1, \ + .exp_re_bias = (1 << (E - 1)) + (1 << (E - 2)), \ .exp_max = (1 << E) - 1 #define FLOAT_PARAMS(E, F) \ |