Oh, yeah, my bad, there is no fscsri, gonna test and push :)
On Wed, Jul 26, 2023 at 3:20 PM juzhe.zh...@rivai.ai <juzhe.zh...@rivai.ai> wrote: > > I just checked SPEC: > > fscsr rd, rs csrrw rd, fcsr, rs > Swap FP control/status register > fscsr rs csrrw x0, fcsr, rs > Write FP control/status register > > It seems that fscsr doesn't have immediate form? I am not sure. > > > juzhe.zh...@rivai.ai > > From: Kito Cheng > Date: 2023-07-26 15:07 > To: Jin Ma > CC: gcc-patches; jeffreyalaw; palmer; richard.sandiford; philipp.tomsich; > christoph.muellner; rdapp.gcc; juzhe.zhong; jinma.contrib > Subject: Re: [PATCH v4] RISC-V: Fixbug for fsflags instruction error using > immediate. > On Wed, Jul 26, 2023 at 1:41 PM Jin Ma via Gcc-patches > <gcc-patches@gcc.gnu.org> wrote: > > > > The pattern mistakenly believes that fsflags can use immediate numbers, > > but in fact it does not support it. Immediate numbers should use fsflagsi. > > > > For example: > > __builtin_riscv_fsflags(4); > > > > The following error occurred. > > /tmp/ccoWdWqT.s: Assembler messages: > > /tmp/ccoWdWqT.s:14: Error: illegal operands `fsflags 4' > > > > gcc/ChangeLog: > > > > * config/riscv/riscv.md: Likewise. > > > > gcc/testsuite/ChangeLog: > > > > * gcc.target/riscv/fsflags.c: New test. > > --- > > gcc/config/riscv/riscv.md | 4 ++-- > > gcc/testsuite/gcc.target/riscv/fsflags.c | 16 ++++++++++++++++ > > 2 files changed, 18 insertions(+), 2 deletions(-) > > create mode 100644 gcc/testsuite/gcc.target/riscv/fsflags.c > > > > diff --git a/gcc/config/riscv/riscv.md b/gcc/config/riscv/riscv.md > > index 4615e811947..24515bcf706 100644 > > --- a/gcc/config/riscv/riscv.md > > +++ b/gcc/config/riscv/riscv.md > > @@ -3074,7 +3074,7 @@ (define_insn "riscv_frcsr" > > "frcsr\t%0") > > > > (define_insn "riscv_fscsr" > > - [(unspec_volatile [(match_operand:SI 0 "csr_operand" "rK")] > > UNSPECV_FSCSR)] > > + [(unspec_volatile [(match_operand:SI 0 "register_operand" "r")] > > UNSPECV_FSCSR)] > > "TARGET_HARD_FLOAT || TARGET_ZFINX" > > "fscsr\t%0") > > Wait, this patch still drops K? >
