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compiler,riscv: implement CSR operations as intrinsics

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CSR operations must be implemented in assembly. The easiest way to
implement them is with some custom intrinsics in the compiler.
This commit is contained in:
Ayke van Laethem
2020-01-06 19:57:48 +01:00
committed by Ron Evans
parent ed9b2dbc03
commit 360923abbf
3 changed files with 324 additions and 0 deletions
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compiler/compiler.go
+2
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@@ -1306,6 +1306,8 @@ func (c *Compiler) parseCall(frame *Frame, instr *ssa.CallCommon) (llvm.Value, e
return c.emitAsmFull(frame, instr)
case strings.HasPrefix(name, "device/arm.SVCall"):
return c.emitSVCall(frame, instr.Args)
case strings.HasPrefix(name, "(device/riscv.CSR)."):
return c.emitCSROperation(frame, instr)
case strings.HasPrefix(name, "syscall.Syscall"):
return c.emitSyscall(frame, instr)
case strings.HasPrefix(name, "runtime/volatile.Load"):