diff options
Diffstat (limited to 'fpu/softfloat.c')
| -rw-r--r-- | fpu/softfloat.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index ea7ee13201..741480c568 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -563,9 +563,7 @@ typedef struct { * frac_size: the size of the fraction field * frac_shift: shift to normalise the fraction with DECOMPOSED_BINARY_POINT * The following are computed based the size of fraction - * frac_lsb: least significant bit of fraction - * frac_lsbm1: the bit below the least significant bit (for rounding) - * round_mask/roundeven_mask: masks used for rounding + * round_mask: bits below lsb which must be rounded * The following optional modifiers are available: * arm_althp: handle ARM Alternative Half Precision */ @@ -575,24 +573,21 @@ typedef struct { int exp_max; int frac_size; int frac_shift; - uint64_t frac_lsb; - uint64_t frac_lsbm1; - uint64_t round_mask; - uint64_t roundeven_mask; bool arm_althp; + uint64_t round_mask; } FloatFmt; /* Expand fields based on the size of exponent and fraction */ -#define FLOAT_PARAMS(E, F) \ - .exp_size = E, \ - .exp_bias = ((1 << E) - 1) >> 1, \ - .exp_max = (1 << E) - 1, \ - .frac_size = F, \ - .frac_shift = (-F - 1) & 63, \ - .frac_lsb = 1ull << ((-F - 1) & 63), \ - .frac_lsbm1 = 1ull << ((-F - 2) & 63), \ - .round_mask = (1ull << ((-F - 1) & 63)) - 1, \ - .roundeven_mask = (2ull << ((-F - 1) & 63)) - 1 +#define FLOAT_PARAMS_(E, F) \ + .exp_size = E, \ + .exp_bias = ((1 << E) - 1) >> 1, \ + .exp_max = (1 << E) - 1, \ + .frac_size = F + +#define FLOAT_PARAMS(E, F) \ + FLOAT_PARAMS_(E, F), \ + .frac_shift = (-F - 1) & 63, \ + .round_mask = (1ull << ((-F - 1) & 63)) - 1 static const FloatFmt float16_params = { FLOAT_PARAMS(5, 10) |