llvm-6502/test/CodeGen/R600/llvm.AMDGPU.legacy.rsq.ll

; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; RUN: llc -march=r600 -mcpu=cypress -verify-machineinstrs < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s

declare float @llvm.AMDGPU.legacy.rsq(float) nounwind readnone

; FUNC-LABEL: {{^}}rsq_legacy_f32:
; SI: V_RSQ_LEGACY_F32_e32
; EG: RECIPSQRT_IEEE
define void @rsq_legacy_f32(float addrspace(1)* %out, float %src) nounwind {
  %rsq = call float @llvm.AMDGPU.legacy.rsq(float %src) nounwind readnone
  store float %rsq, float addrspace(1)* %out, align 4
  ret void
}
R600: Fix inconsistency in rsq instructions. R600 was using a clamped version of rsq, but SI was not. Add a new rsq_clamped intrinsic and use them consistently. It's unclear to me from the documentation what behavior the R600 instructions have, so I assume they have the legacy behavior described by the SI documents. For R600, use RECIPSQRT_IEEE for both llvm.AMDGPU.rsq.legacy and llvm.AMDGPU.rsq. R600 also has RECIPSQRT_FF, which I'm not sure how it fits in here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211637 91177308-0d34-0410-b5e6-96231b3b80d8 2014-06-24 22:13:39 +00:00			`; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s \| FileCheck -check-prefix=SI -check-prefix=FUNC %s`
			`; RUN: llc -march=r600 -mcpu=cypress -verify-machineinstrs < %s \| FileCheck -check-prefix=EG -check-prefix=FUNC %s`

			`declare float @llvm.AMDGPU.legacy.rsq(float) nounwind readnone`

R600: Call EmitFunctionHeader() in the AsmPrinter to populate the ELF symbol table git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218776 91177308-0d34-0410-b5e6-96231b3b80d8 2014-10-01 17:15:17 +00:00			`; FUNC-LABEL: {{^}}rsq_legacy_f32:`
R600: Fix inconsistency in rsq instructions. R600 was using a clamped version of rsq, but SI was not. Add a new rsq_clamped intrinsic and use them consistently. It's unclear to me from the documentation what behavior the R600 instructions have, so I assume they have the legacy behavior described by the SI documents. For R600, use RECIPSQRT_IEEE for both llvm.AMDGPU.rsq.legacy and llvm.AMDGPU.rsq. R600 also has RECIPSQRT_FF, which I'm not sure how it fits in here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211637 91177308-0d34-0410-b5e6-96231b3b80d8 2014-06-24 22:13:39 +00:00			`; SI: V_RSQ_LEGACY_F32_e32`
			`; EG: RECIPSQRT_IEEE`
			`define void @rsq_legacy_f32(float addrspace(1)* %out, float %src) nounwind {`
			`%rsq = call float @llvm.AMDGPU.legacy.rsq(float %src) nounwind readnone`
			`store float %rsq, float addrspace(1)* %out, align 4`
			`ret void`
			`}`