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| author | Zong Li <zong@andestech.com> | 2018-11-01 18:22:00 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2018-11-01 18:22:00 +0000 |
| commit | af1d5782c1e3a635fdd13d6688be64de7759857c (patch) | |
| tree | fa86065c4496554e922b812d0d5f578ad312a251 /soft-fp | |
| parent | ff48ea6787526d7e669af93ce2681b911d39675c (diff) | |
| download | glibc-af1d5782c1e3a635fdd13d6688be64de7759857c.tar.gz glibc-af1d5782c1e3a635fdd13d6688be64de7759857c.tar.xz glibc-af1d5782c1e3a635fdd13d6688be64de7759857c.zip | |
soft-fp: Add implementation for 128 bit self-contained
Here only add the implementation when building the RV32 port.
These macros are used when the following situations occur at the same
time: soft-fp fma, ldbl-128 and 32-bit _FP_W_TYPE_SIZE. The RISC-V
32-bit port is the first port which use all three together.
This is the building flow about the situation:
When building soft-fp/s_fmal.c, there uses the FP_FMA_Q in __fmal.
The _FP_W_TYPE_SIZE is defined to 32-bit in sysdeps/riscv/sfp-machine.h,
so the FP_FMA_Q was defined to _FP_FMA (Q, 4, 8, R, X, Y, Z) in
soft-fp/quad.h.
Something in the soft-fp/quad.h:
#if _FP_W_TYPE_SIZE < 64
# define FP_FMA_Q(R, X, Y, Z) _FP_FMA (Q, 4, 8, R, X, Y, Z)
#else
# define FP_FMA_Q(R, X, Y, Z) _FP_FMA (Q, 2, 4, R, X, Y, Z)
#endif
Finally, in _FP_FMA (fs, wc, dwc, R, X, Y, Z), it will use the
_FP_FRAC_HIGHBIT_DW_##dwc macro, and it will be expanded to
_FP_FRAC_HIGHBIT_DW_8, but the _FP_FRAC_HIGHBIT_DW_8 is not be
implemented in soft-fp/op-8.h. there is only _FP_FRAC_HIGHBIT_DW_1,
_FP_FRAC_HIGHBIT_DW_2 and _FP_FRAC_HIGHBIT_DW_4 in the
soft-fp/op-*.h.
After this modification, we can pass the soft floating testing of glibc
testsuites on RV32.
* soft-fp/op-8.h (_FP_FRAC_SET_8, _FP_FRAC_ADD_8, _FP_FRAC_SUB_8)
(_FP_FRAC_CLZ_8, _FP_MINFRAC_8, _FP_FRAC_NEGP_8, _FP_FRAC_ZEROP_8)
(_FP_FRAC_HIGHBIT_DW_8, _FP_FRAC_COPY_4_8, _FP_FRAC_COPY_8_4)
(__FP_FRAC_SET_8): Add implementation for RV32 use.
Diffstat (limited to 'soft-fp')
| -rw-r--r-- | soft-fp/op-8.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/soft-fp/op-8.h b/soft-fp/op-8.h index ffed258be1..4871c49ea9 100644 --- a/soft-fp/op-8.h +++ b/soft-fp/op-8.h @@ -35,6 +35,7 @@ /* We need just a few things from here for op-4, if we ever need some other macros, they can be added. */ #define _FP_FRAC_DECL_8(X) _FP_W_TYPE X##_f[8] +#define _FP_FRAC_SET_8(X, I) __FP_FRAC_SET_8 (X, I) #define _FP_FRAC_HIGH_8(X) (X##_f[7]) #define _FP_FRAC_LOW_8(X) (X##_f[0]) #define _FP_FRAC_WORD_8(X, w) (X##_f[w]) @@ -147,4 +148,91 @@ } \ while (0) +#define _FP_FRAC_ADD_8(R, X, Y) \ + do \ + { \ + _FP_W_TYPE _FP_FRAC_ADD_8_c = 0; \ + _FP_I_TYPE _FP_FRAC_ADD_8_i; \ + for (_FP_FRAC_ADD_8_i = 0; _FP_FRAC_ADD_8_i < 8; ++_FP_FRAC_ADD_8_i) \ + { \ + R##_f[_FP_FRAC_ADD_8_i] \ + = (X##_f[_FP_FRAC_ADD_8_i] + Y##_f[_FP_FRAC_ADD_8_i] \ + + _FP_FRAC_ADD_8_c); \ + _FP_FRAC_ADD_8_c \ + = (_FP_FRAC_ADD_8_c \ + ? R##_f[_FP_FRAC_ADD_8_i] <= X##_f[_FP_FRAC_ADD_8_i] \ + : R##_f[_FP_FRAC_ADD_8_i] < X##_f[_FP_FRAC_ADD_8_i]); \ + } \ + } \ + while (0) + +#define _FP_FRAC_SUB_8(R, X, Y) \ + do \ + { \ + _FP_W_TYPE _FP_FRAC_SUB_8_tmp[8]; \ + _FP_W_TYPE _FP_FRAC_SUB_8_c = 0; \ + _FP_I_TYPE _FP_FRAC_SUB_8_i; \ + for (_FP_FRAC_SUB_8_i = 0; _FP_FRAC_SUB_8_i < 8; ++_FP_FRAC_SUB_8_i) \ + { \ + _FP_FRAC_SUB_8_tmp[_FP_FRAC_SUB_8_i] \ + = (X##_f[_FP_FRAC_SUB_8_i] - Y##_f[_FP_FRAC_SUB_8_i] \ + - _FP_FRAC_SUB_8_c); \ + _FP_FRAC_SUB_8_c \ + = (_FP_FRAC_SUB_8_c \ + ? (_FP_FRAC_SUB_8_tmp[_FP_FRAC_SUB_8_i] \ + >= X##_f[_FP_FRAC_SUB_8_i]) \ + : (_FP_FRAC_SUB_8_tmp[_FP_FRAC_SUB_8_i] \ + > X##_f[_FP_FRAC_SUB_8_i])); \ + } \ + for (_FP_FRAC_SUB_8_i = 0; _FP_FRAC_SUB_8_i < 8; ++_FP_FRAC_SUB_8_i) \ + R##_f[_FP_FRAC_SUB_8_i] = _FP_FRAC_SUB_8_tmp[_FP_FRAC_SUB_8_i]; \ + } \ + while (0) + +#define _FP_FRAC_CLZ_8(R, X) \ + do \ + { \ + _FP_I_TYPE _FP_FRAC_CLZ_8_i; \ + for (_FP_FRAC_CLZ_8_i = 7; _FP_FRAC_CLZ_8_i > 0; _FP_FRAC_CLZ_8_i--) \ + if (X##_f[_FP_FRAC_CLZ_8_i]) \ + break; \ + __FP_CLZ ((R), X##_f[_FP_FRAC_CLZ_8_i]); \ + (R) += _FP_W_TYPE_SIZE * (7 - _FP_FRAC_CLZ_8_i); \ + } \ + while (0) + +#define _FP_MINFRAC_8 0, 0, 0, 0, 0, 0, 0, 1 + +#define _FP_FRAC_NEGP_8(X) ((_FP_WS_TYPE) X##_f[7] < 0) +#define _FP_FRAC_ZEROP_8(X) \ + ((X##_f[0] | X##_f[1] | X##_f[2] | X##_f[3] \ + | X##_f[4] | X##_f[5] | X##_f[6] | X##_f[7]) == 0) +#define _FP_FRAC_HIGHBIT_DW_8(fs, X) \ + (_FP_FRAC_HIGH_DW_##fs (X) & _FP_HIGHBIT_DW_##fs) + +#define _FP_FRAC_COPY_4_8(D, S) \ + do \ + { \ + D##_f[0] = S##_f[0]; \ + D##_f[1] = S##_f[1]; \ + D##_f[2] = S##_f[2]; \ + D##_f[3] = S##_f[3]; \ + } \ + while (0) + +#define _FP_FRAC_COPY_8_4(D, S) \ + do \ + { \ + D##_f[0] = S##_f[0]; \ + D##_f[1] = S##_f[1]; \ + D##_f[2] = S##_f[2]; \ + D##_f[3] = S##_f[3]; \ + D##_f[4] = D##_f[5] = D##_f[6] = D##_f[7]= 0; \ + } \ + while (0) + +#define __FP_FRAC_SET_8(X, I7, I6, I5, I4, I3, I2, I1, I0) \ + (X##_f[7] = I7, X##_f[6] = I6, X##_f[5] = I5, X##_f[4] = I4, \ + X##_f[3] = I3, X##_f[2] = I2, X##_f[1] = I1, X##_f[0] = I0) + #endif /* !SOFT_FP_OP_8_H */ |