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5 Commits

Author SHA1 Message Date
LiaoChunyu
7b970290c0 [RISCV] Optimize SELECT_CC when the true value of select is Constant 
(select (setcc lhs, rhs, CC), constant, falsev) -> (select (setcc lhs, rhs, InverseCC), falsev, constant)

This patch removes unnecessary copies

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D129757
 2022-10-18 09:24:17 +08:00
Shao-Ce SUN
84bacb18c6 [RISCV] Use check-prefixes to reduce check lines 
Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D125083
 2022-06-06 15:59:15 +08:00
Shao-Ce SUN
a0a76fee0c [RISCV] update zfh and zfhmin extention to v1.0 
`zfh` and `zfhmin` have been ratified, with version 1.0.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D117098
 2022-01-15 09:21:24 +08:00
Haocong.Lu
bd653f6406 [RISCV] Use shift for zero extension when Zbb and Zbp are not enabled 
Now AND is used for zero extension when both Zbb and Zbp are not enabled.
It may be better to use shift operation if the trailing ones mask exceeds simm12.

This patch optimzes LUI+ADDI+AND to SLLI+SRLI.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D116720
 2022-01-11 02:37:03 +00:00
Craig Topper
b7b260e19a [RISCV] Support strict FP conversion operations. 
This adds support for strict conversions between fp types and between
integer and fp.

NOTE: RISCV has static rounding mode instructions, but the constrainted
intrinsic metadata is not used to select static rounding modes. Dynamic
rounding mode is always used.

Differential Revision: https://reviews.llvm.org/D115997
 2021-12-23 09:40:58 -06:00