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[ARM] Select fp16 fma

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This adds a pattern for fma, similar to the float and double patterns.

Differential Revision: https://reviews.llvm.org/D62330

llvm-svn: 361719
This commit is contained in:
David Green 2019-05-26 11:34:30 +00:00
parent cf943eac87
commit 0532e48bcd
2 changed files with 18 additions and 9 deletions
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3
lib/Target/ARM/ARMInstrVFP.td
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@ -2073,6 +2073,9 @@ def : Pat<(f64 (fma DPR:$Dn, DPR:$Dm, DPR:$Ddin)),
def : Pat<(f32 (fma SPR:$Sn, SPR:$Sm, SPR:$Sdin)),
(VFMAS SPR:$Sdin, SPR:$Sn, SPR:$Sm)>,
Requires<[HasVFP4]>;
def : Pat<(f16 (fma HPR:$Sn, HPR:$Sm, HPR:$Sdin)),
(VFMAH HPR:$Sdin, HPR:$Sn, HPR:$Sm)>,
Requires<[HasFullFP16]>;
def VFMSD : ADbI<0b11101, 0b10, 1, 0,
(outs DPR:$Dd), (ins DPR:$Ddin, DPR:$Dn, DPR:$Dm),

24
test/CodeGen/ARM/fp16-fullfp16.ll
View File

@ -386,15 +386,21 @@ define void @test_log2(half* %p) {
ret void
}
; FIXME
;define void @test_fma(half* %p, half* %q, half* %r) {
; %a = load half, half* %p, align 2
; %b = load half, half* %q, align 2
; %c = load half, half* %r, align 2
; %v = call half @llvm.fma.f16(half %a, half %b, half %c)
; store half %v, half* %p
; ret void
;}
define void @test_fma(half* %p, half* %q, half* %r) {
; CHECK-LABEL: test_fma:
; CHECK: vldr.16 s0, [r1]
; CHECK-NEXT: vldr.16 s2, [r0]
; CHECK-NEXT: vldr.16 s4, [r2]
; CHECK-NEXT: vfma.f16 s4, s2, s0
; CHECK-NEXT: vstr.16 s4, [r0]
; CHECK-NEXT: bx lr
%a = load half, half* %p, align 2
%b = load half, half* %q, align 2
%c = load half, half* %r, align 2
%v = call half @llvm.fma.f16(half %a, half %b, half %c)
store half %v, half* %p
ret void
}
define void @test_fabs(half* %p) {
; CHECK-LABEL: test_fabs: