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RISC-V: Build soft-float divide routines for -mno-fdiv. 

Using -mno-fdiv gives linker errors unless we build the missing divide
routines in libgcc always.  There is at least one university project
designing RISC-V parts without FP divide that wants to use the option.

	libgcc/
	* config/riscv/t-softfp32 (softfp_extra): Add FP divide routines

From-SVN: r277723
This commit is contained in:
Jim Wilson 2019-11-01 20:35:12 +00:00 committed by Jim Wilson
parent 2df0c2315a
commit 8dc56a2244
2 changed files with 21 additions and 0 deletions
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4
libgcc/ChangeLog
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@ -1,3 +1,7 @@
2019-11-01 Jim Wilson <jimw@sifive.com>
* config/riscv/t-softfp32 (softfp_extra): Add FP divide routines
2019-10-23 Jozef Lawrynowicz <jozef.l@mittosystems.com>
* config/msp430/lib2hw_mul.S: Fix wrong syntax in branch instruction.

17
libgcc/config/riscv/t-softfp32
View File

@ -12,7 +12,11 @@ softfp_float_modes := tf
softfp_extensions := sftf dftf
softfp_truncations := tfsf tfdf
# Enable divide routines to make -mno-fdiv work.
softfp_extras := divsf3 divdf3
else
# !ABI_DOUBLE
softfp_float_modes := df tf
softfp_extensions := sfdf sftf dftf
@ -20,7 +24,20 @@ softfp_truncations := dfsf tfsf tfdf
ifndef ABI_SINGLE
softfp_float_modes += sf
else
# ABI_SINGLE
# Enable divide routines to make -mno-fdiv work.
softfp_extras := divsf3
endif
endif
else
# ABI_QUAD
# Enable divide routines to make -mno-fdiv work.
softfp_extras := divsf3 divdf3 divtf3
endif