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clang-p2996/llvm/test/CodeGen/RISCV/half-arith-strict.ll
Monk Chiang 7b50c18360 [RISCV] Codegen support for Zfhmin. 
The Zfhmin subset only has FLH, FSH, FMV.X.H, FMV.H.X, FCVT.S.H, and FCVT.H.S.
If the D extension is present, the FCVT.D.H and FCVT.H.D instructions are also included.
Since most instructions are not included for Zfhmin, so most operations are promoted.
The patch primarily about making f16 a legal type.

RISC-V ISA info:
https://wiki.riscv.org/display/HOME/Recently+Ratified+Extensions

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D139391
2022-12-06 22:14:15 -08:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -mattr=+zfh -verify-machineinstrs \
; RUN: -disable-strictnode-mutation -target-abi ilp32f < %s | FileCheck %s
; RUN: llc -mtriple=riscv64 -mattr=+zfh -verify-machineinstrs \
; RUN: -disable-strictnode-mutation -target-abi lp64f < %s | FileCheck %s
; RUN: llc -mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs \
; RUN: -disable-strictnode-mutation -target-abi ilp32f < %s \
; RUN: | FileCheck -check-prefix=CHECK-ZFHMIN %s
; RUN: llc -mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs \
; RUN: -disable-strictnode-mutation -target-abi lp64f < %s \
; RUN: | FileCheck -check-prefix=CHECK-ZFHMIN %s
; FIXME: We can't test without Zfh because soft promote legalization isn't
; implemented in SelectionDAG for STRICT nodes.
define half @fadd_h(half %a, half %b) nounwind strictfp {
; CHECK-LABEL: fadd_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fadd.h fa0, fa0, fa1
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fadd_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, fa0
; CHECK-ZFHMIN-NEXT: fadd.s ft0, ft1, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%1 = call half @llvm.experimental.constrained.fadd.f16(half %a, half %b, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
declare half @llvm.experimental.constrained.fadd.f16(half, half, metadata, metadata)
define half @fsub_h(half %a, half %b) nounwind strictfp {
; CHECK-LABEL: fsub_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fsub.h fa0, fa0, fa1
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fsub_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, fa0
; CHECK-ZFHMIN-NEXT: fsub.s ft0, ft1, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%1 = call half @llvm.experimental.constrained.fsub.f16(half %a, half %b, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
declare half @llvm.experimental.constrained.fsub.f16(half, half, metadata, metadata)
define half @fmul_h(half %a, half %b) nounwind strictfp {
; CHECK-LABEL: fmul_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fmul.h fa0, fa0, fa1
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fmul_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, fa0
; CHECK-ZFHMIN-NEXT: fmul.s ft0, ft1, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%1 = call half @llvm.experimental.constrained.fmul.f16(half %a, half %b, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
declare half @llvm.experimental.constrained.fmul.f16(half, half, metadata, metadata)
define half @fdiv_h(half %a, half %b) nounwind strictfp {
; CHECK-LABEL: fdiv_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fdiv.h fa0, fa0, fa1
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fdiv_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, fa0
; CHECK-ZFHMIN-NEXT: fdiv.s ft0, ft1, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%1 = call half @llvm.experimental.constrained.fdiv.f16(half %a, half %b, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
declare half @llvm.experimental.constrained.fdiv.f16(half, half, metadata, metadata)
define half @fsqrt_h(half %a) nounwind strictfp {
; CHECK-LABEL: fsqrt_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fsqrt.h fa0, fa0
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fsqrt_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa0
; CHECK-ZFHMIN-NEXT: fsqrt.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%1 = call half @llvm.experimental.constrained.sqrt.f16(half %a, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
declare half @llvm.experimental.constrained.sqrt.f16(half, metadata, metadata)
; FIXME: fminnum/fmaxnum need libcalls to handle SNaN, but we don't have f16
; libcalls and don't support promotion yet.
;define half @fmin_h(half %a, half %b) nounwind strictfp {
; %1 = call half @llvm.experimental.constrained.minnum.f16(half %a, half %b, metadata !"fpexcept.strict") strictfp
; ret half %1
;}
;declare half @llvm.experimental.constrained.minnum.f16(half, half, metadata) strictfp
;
;define half @fmax_h(half %a, half %b) nounwind strictfp {
; %1 = call half @llvm.experimental.constrained.maxnum.f16(half %a, half %b, metadata !"fpexcept.strict") strictfp
; ret half %1
;}
;declare half @llvm.experimental.constrained.maxnum.f16(half, half, metadata) strictfp
define half @fmadd_h(half %a, half %b, half %c) nounwind strictfp {
; CHECK-LABEL: fmadd_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fmadd.h fa0, fa0, fa1, fa2
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fmadd_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa2
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, fa1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft2, fa0
; CHECK-ZFHMIN-NEXT: fmadd.s ft0, ft2, ft1, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%1 = call half @llvm.experimental.constrained.fma.f16(half %a, half %b, half %c, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
declare half @llvm.experimental.constrained.fma.f16(half, half, half, metadata, metadata) strictfp
define half @fmsub_h(half %a, half %b, half %c) nounwind strictfp {
; CHECK-LABEL: fmsub_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fmv.h.x ft0, zero
; CHECK-NEXT: fadd.h ft0, fa2, ft0
; CHECK-NEXT: fmsub.h fa0, fa0, fa1, ft0
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fmsub_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa2
; CHECK-ZFHMIN-NEXT: fmv.w.x ft1, zero
; CHECK-ZFHMIN-NEXT: fadd.s ft0, ft0, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fneg.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, fa1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft2, fa0
; CHECK-ZFHMIN-NEXT: fmadd.s ft0, ft2, ft1, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%c_ = fadd half 0.0, %c ; avoid negation using xor
%negc = fneg half %c_
%1 = call half @llvm.experimental.constrained.fma.f16(half %a, half %b, half %negc, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
define half @fnmadd_h(half %a, half %b, half %c) nounwind strictfp {
; CHECK-LABEL: fnmadd_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fmv.h.x ft0, zero
; CHECK-NEXT: fadd.h ft1, fa0, ft0
; CHECK-NEXT: fadd.h ft0, fa2, ft0
; CHECK-NEXT: fnmadd.h fa0, ft1, fa1, ft0
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fnmadd_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa0
; CHECK-ZFHMIN-NEXT: fmv.w.x ft1, zero
; CHECK-ZFHMIN-NEXT: fadd.s ft0, ft0, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft2, fa2
; CHECK-ZFHMIN-NEXT: fadd.s ft1, ft2, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft1, ft1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fneg.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, ft1
; CHECK-ZFHMIN-NEXT: fneg.s ft1, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft1, ft1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, ft1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft2, fa1
; CHECK-ZFHMIN-NEXT: fmadd.s ft0, ft0, ft2, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%a_ = fadd half 0.0, %a
%c_ = fadd half 0.0, %c
%nega = fneg half %a_
%negc = fneg half %c_
%1 = call half @llvm.experimental.constrained.fma.f16(half %nega, half %b, half %negc, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
define half @fnmadd_h_2(half %a, half %b, half %c) nounwind strictfp {
; CHECK-LABEL: fnmadd_h_2:
; CHECK: # %bb.0:
; CHECK-NEXT: fmv.h.x ft0, zero
; CHECK-NEXT: fadd.h ft1, fa1, ft0
; CHECK-NEXT: fadd.h ft0, fa2, ft0
; CHECK-NEXT: fnmadd.h fa0, ft1, fa0, ft0
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fnmadd_h_2:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa1
; CHECK-ZFHMIN-NEXT: fmv.w.x ft1, zero
; CHECK-ZFHMIN-NEXT: fadd.s ft0, ft0, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft2, fa2
; CHECK-ZFHMIN-NEXT: fadd.s ft1, ft2, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft1, ft1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fneg.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, ft1
; CHECK-ZFHMIN-NEXT: fneg.s ft1, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft1, ft1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, ft1
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft2, fa0
; CHECK-ZFHMIN-NEXT: fmadd.s ft0, ft2, ft0, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%b_ = fadd half 0.0, %b
%c_ = fadd half 0.0, %c
%negb = fneg half %b_
%negc = fneg half %c_
%1 = call half @llvm.experimental.constrained.fma.f16(half %a, half %negb, half %negc, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
define half @fnmsub_h(half %a, half %b, half %c) nounwind strictfp {
; CHECK-LABEL: fnmsub_h:
; CHECK: # %bb.0:
; CHECK-NEXT: fmv.h.x ft0, zero
; CHECK-NEXT: fadd.h ft0, fa0, ft0
; CHECK-NEXT: fnmsub.h fa0, ft0, fa1, fa2
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fnmsub_h:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa0
; CHECK-ZFHMIN-NEXT: fmv.w.x ft1, zero
; CHECK-ZFHMIN-NEXT: fadd.s ft0, ft0, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fneg.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, fa2
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft2, fa1
; CHECK-ZFHMIN-NEXT: fmadd.s ft0, ft0, ft2, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%a_ = fadd half 0.0, %a
%nega = fneg half %a_
%1 = call half @llvm.experimental.constrained.fma.f16(half %nega, half %b, half %c, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
define half @fnmsub_h_2(half %a, half %b, half %c) nounwind strictfp {
; CHECK-LABEL: fnmsub_h_2:
; CHECK: # %bb.0:
; CHECK-NEXT: fmv.h.x ft0, zero
; CHECK-NEXT: fadd.h ft0, fa1, ft0
; CHECK-NEXT: fnmsub.h fa0, ft0, fa0, fa2
; CHECK-NEXT: ret
;
; CHECK-ZFHMIN-LABEL: fnmsub_h_2:
; CHECK-ZFHMIN: # %bb.0:
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, fa1
; CHECK-ZFHMIN-NEXT: fmv.w.x ft1, zero
; CHECK-ZFHMIN-NEXT: fadd.s ft0, ft0, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fneg.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.h.s ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft0, ft0
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft1, fa2
; CHECK-ZFHMIN-NEXT: fcvt.s.h ft2, fa0
; CHECK-ZFHMIN-NEXT: fmadd.s ft0, ft2, ft0, ft1
; CHECK-ZFHMIN-NEXT: fcvt.h.s fa0, ft0
; CHECK-ZFHMIN-NEXT: ret
%b_ = fadd half 0.0, %b
%negb = fneg half %b_
%1 = call half @llvm.experimental.constrained.fma.f16(half %a, half %negb, half %c, metadata !"round.dynamic", metadata !"fpexcept.strict") strictfp
ret half %1
}
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