glibc/soft-fp
Zong Li af1d5782c1 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.
2018-11-01 18:22:00 +00:00
..
adddf3.c
addsf3.c
addtf3.c
divdf3.c
divsf3.c
divtf3.c
double.h
eqdf2.c
eqsf2.c
eqtf2.c
extenddftf2.c
extended.h
extendhftf2.c
extendsfdf2.c
extendsftf2.c
extendxftf2.c
fixdfdi.c
fixdfsi.c
fixdfti.c
fixhfti.c
fixsfdi.c
fixsfsi.c
fixsfti.c
fixtfdi.c
fixtfsi.c
fixtfti.c
fixunsdfdi.c
fixunsdfsi.c
fixunsdfti.c
fixunshfti.c
fixunssfdi.c
fixunssfsi.c
fixunssfti.c
fixunstfdi.c
fixunstfsi.c
fixunstfti.c
floatdidf.c
floatdisf.c
floatditf.c
floatsidf.c
floatsisf.c
floatsitf.c
floattidf.c
floattihf.c
floattisf.c
floattitf.c
floatundidf.c
floatundisf.c
floatunditf.c
floatunsidf.c
floatunsisf.c
floatunsitf.c
floatuntidf.c
floatuntihf.c
floatuntisf.c
floatuntitf.c
gedf2.c
gesf2.c
getf2.c
half.h
ledf2.c
lesf2.c
letf2.c
Makefile
muldf3.c
mulsf3.c
multf3.c
negdf2.c
negsf2.c
negtf2.c
op-1.h
op-2.h
op-4.h soft-fp: Use temporary variable in FP_FRAC_SUB_3/FP_FRAC_SUB_4 2018-11-01 17:34:39 +00:00
op-8.h soft-fp: Add implementation for 128 bit self-contained 2018-11-01 18:22:00 +00:00
op-common.h
quad.h
single.h
soft-fp.h
subdf3.c
subsf3.c
subtf3.c
testit.c
truncdfsf2.c
trunctfdf2.c
trunctfhf2.c
trunctfsf2.c
trunctfxf2.c
unorddf2.c
unordsf2.c
unordtf2.c