https://github.com/joshua-arch1 updated https://github.com/llvm/llvm-project/pull/184566
>From e383040c9bdfbde77fca740bde3ed1ffe541ef1a Mon Sep 17 00:00:00 2001 From: joshua-arch1 <[email protected]> Date: Wed, 4 Mar 2026 17:08:06 +0800 Subject: [PATCH] [RISCV] Support 'f' Inline Assembly Constraint for bfloat16 --- clang/test/CodeGen/RISCV/riscv-inline-asm.c | 4 ++++ llvm/lib/Target/RISCV/RISCVISelLowering.cpp | 2 ++ 2 files changed, 6 insertions(+) diff --git a/clang/test/CodeGen/RISCV/riscv-inline-asm.c b/clang/test/CodeGen/RISCV/riscv-inline-asm.c index f2031e0adcbcb..183ee7e34764c 100644 --- a/clang/test/CodeGen/RISCV/riscv-inline-asm.c +++ b/clang/test/CodeGen/RISCV/riscv-inline-asm.c @@ -78,6 +78,7 @@ void test_K(void) { float f; double d; +__bf16 bf; void test_f(void) { // CHECK-LABEL: define{{.*}} void @test_f() // CHECK: [[FLT_ARG:%[a-zA-Z_0-9]+]] = load float, ptr @f @@ -86,6 +87,9 @@ void test_f(void) { // CHECK: [[FLT_ARG:%[a-zA-Z_0-9]+]] = load double, ptr @d // CHECK: call void asm sideeffect "", "f"(double [[FLT_ARG]]) asm volatile ("" :: "f"(d)); +// CHECK: [[FLT_ARG:%[a-zA-Z_0-9]+]] = load bfloat, ptr @bf +// CHECK: call void asm sideeffect "", "f"(bfloat [[FLT_ARG]]) + asm volatile ("" :: "f"(bf)); } void test_A(int *p) { diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp index 7e62957529fea..c5b360052cdbb 100644 --- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp +++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp @@ -25215,6 +25215,8 @@ RISCVTargetLowering::getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI, return std::make_pair(0U, &RISCV::FPR16RegClass); if (Subtarget.hasStdExtZhinxmin()) return std::make_pair(0U, &RISCV::GPRF16NoX0RegClass); + } else if (VT == MVT::bf16 && Subtarget.hasStdExtZfbfmin()) { + return std::make_pair(0U, &RISCV::FPR16RegClass); } else if (VT == MVT::f32) { if (Subtarget.hasStdExtF()) return std::make_pair(0U, &RISCV::FPR32RegClass); _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
