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soft-fp: Add implementation for 128 bit self-contained

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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.
This commit is contained in:
Zong Li 2018-11-01 18:22:00 +00:00 committed by Joseph Myers
parent ff48ea6787
commit af1d5782c1
2 changed files with 93 additions and 0 deletions
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5
ChangeLog
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@ -1,5 +1,10 @@
2018-11-01 Zong Li <zong@andestech.com> 2018-11-01 Zong Li <zong@andestech.com>
* 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.
* soft-fp/op-4.h (_FP_FRAC_SUB_3, _FP_FRAC_SUB_4): Use temporary * soft-fp/op-4.h (_FP_FRAC_SUB_3, _FP_FRAC_SUB_4): Use temporary
variable to avoid overlap arguments. variable to avoid overlap arguments.

88
soft-fp/op-8.h
View File

@ -35,6 +35,7 @@
/* We need just a few things from here for op-4, if we ever need some /* We need just a few things from here for op-4, if we ever need some
other macros, they can be added. */ other macros, they can be added. */
#define _FP_FRAC_DECL_8(X) _FP_W_TYPE X##_f[8] #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_HIGH_8(X) (X##_f[7])
#define _FP_FRAC_LOW_8(X) (X##_f[0]) #define _FP_FRAC_LOW_8(X) (X##_f[0])
#define _FP_FRAC_WORD_8(X, w) (X##_f[w]) #define _FP_FRAC_WORD_8(X, w) (X##_f[w])
@ -147,4 +148,91 @@
} \ } \
while (0) 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 */ #endif /* !SOFT_FP_OP_8_H */