[llvm] [Xtensa] Implement Xtensa Floating Point Option. (PR #136086)

[Matt Arsenault via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=xtensa -mattr=+fp -verify-machineinstrs < %s | FileCheck -check-prefix=XTENSA %s
+
+define float @fadd_s(float %a, float %b) nounwind {
+; XTENSA-LABEL: fadd_s:
+; XTENSA:       # %bb.0:
+; XTENSA-NEXT:    wfr f8, a3
+; XTENSA-NEXT:    wfr f9, a2
+; XTENSA-NEXT:    add.s f8, f9, f8
+; XTENSA-NEXT:    rfr a2, f8
+; XTENSA-NEXT:    ret
+  %1 = fadd float %a, %b
+  ret float %1
+}
+
+define float @fsub_s(float %a, float %b) nounwind {
+; XTENSA-LABEL: fsub_s:
+; XTENSA:       # %bb.0:
+; XTENSA-NEXT:    wfr f8, a3
+; XTENSA-NEXT:    wfr f9, a2
+; XTENSA-NEXT:    sub.s f8, f9, f8
+; XTENSA-NEXT:    rfr a2, f8
+; XTENSA-NEXT:    ret
+  %1 = fsub float %a, %b
+  ret float %1
+}
+
+define float @fmul_s(float %a, float %b) nounwind {
+; XTENSA-LABEL: fmul_s:
+; XTENSA:       # %bb.0:
+; XTENSA-NEXT:    wfr f8, a3
+; XTENSA-NEXT:    wfr f9, a2
+; XTENSA-NEXT:    mul.s f8, f9, f8
+; XTENSA-NEXT:    rfr a2, f8
+; XTENSA-NEXT:    ret
+  %1 = fmul float %a, %b
+  ret float %1
+}
+
+define float @fdiv_s(float %a, float %b) nounwind {
+; XTENSA-LABEL: fdiv_s:
+; XTENSA:       # %bb.0:
+; XTENSA-NEXT:    addi a8, a1, -16
+; XTENSA-NEXT:    or a1, a8, a8
+; XTENSA-NEXT:    s32i a0, a1, 0 # 4-byte Folded Spill
+; XTENSA-NEXT:    l32r a8, .LCPI3_0
+; XTENSA-NEXT:    callx0 a8
+; XTENSA-NEXT:    l32i a0, a1, 0 # 4-byte Folded Reload
+; XTENSA-NEXT:    addi a8, a1, 16
+; XTENSA-NEXT:    or a1, a8, a8
+; XTENSA-NEXT:    ret
+  %1 = fdiv float %a, %b
+  ret float %1
+}
+
+declare float @llvm.sqrt.f32(float)
+
+define float @fsqrt_s(float %a) nounwind {
+; XTENSA-LABEL: fsqrt_s:
+; XTENSA:       # %bb.0:
+; XTENSA-NEXT:    addi a8, a1, -16
+; XTENSA-NEXT:    or a1, a8, a8
+; XTENSA-NEXT:    s32i a0, a1, 0 # 4-byte Folded Spill
+; XTENSA-NEXT:    l32r a8, .LCPI4_0
+; XTENSA-NEXT:    callx0 a8
+; XTENSA-NEXT:    l32i a0, a1, 0 # 4-byte Folded Reload
+; XTENSA-NEXT:    addi a8, a1, 16
+; XTENSA-NEXT:    or a1, a8, a8
+; XTENSA-NEXT:    ret
+  %1 = call float @llvm.sqrt.f32(float %a)
+  ret float %1
+}
+
+declare float @llvm.fabs.f32(float)
+
+define float @fabs_s(float %a, float %b) nounwind {
+; XTENSA-LABEL: fabs_s:
+; XTENSA:       # %bb.0:
+; XTENSA-NEXT:    wfr f8, a3
+; XTENSA-NEXT:    wfr f9, a2
+; XTENSA-NEXT:    add.s f8, f9, f8
+; XTENSA-NEXT:    abs.s f9, f8
+; XTENSA-NEXT:    add.s f8, f9, f8
+; XTENSA-NEXT:    rfr a2, f8
+; XTENSA-NEXT:    ret
+  %1 = fadd float %a, %b
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arsenm wrote:

Use named values in tests 

https://github.com/llvm/llvm-project/pull/136086