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[codegen] reintroduce support for carry and borrow instructions in RI… (#1005)

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Reintroduce support for iadd carry variants and isub borrow variants for
RISC ISAs which had been removed in
https://github.com/CraneStation/cranelift/pull/961 and
https://github.com/CraneStation/cranelift/pull/962 because of the lack
of a proper flags register in RISC architectures.
This commit is contained in:
Ujjwal Sharma
2019-09-13 20:57:50 +05:30
committed by Benjamin Bouvier
parent cadd0ac655
commit 3418fb6e18
17 changed files with 326 additions and 85 deletions
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3
cranelift/filetests/filetests/isa/riscv/expand-i32.clif.bak → cranelift/filetests/filetests/isa/riscv/expand-i32.clif
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@@ -1,6 +1,3 @@
; TODO(ryzokuken): figure out a better legalization strategy for platforms that
; platforms that don't have flags.
; Test the legalization of i32 instructions that don't have RISC-V versions.
test legalizer

3
cranelift/filetests/filetests/isa/riscv/legalize-i64.clif.bak → cranelift/filetests/filetests/isa/riscv/legalize-i64.clif
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@@ -1,6 +1,3 @@
; TODO(ryzokuken): figure out a better legalization strategy for platforms that
; platforms that don't have flags.
; Test the legalization of i64 arithmetic instructions.
test legalizer
target riscv32 supports_m=1