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760a46522a
The FPv4-SP floating-point unit is generally referred to as single-precision only, but it does have double-precision registers and load, store and GPR<->DPR move instructions which operate on them. This patch enables the use of these registers, the main advantage of which is that we now comply with the AAPCS-VFP calling convention. This partially reverts r209650, which added some AAPCS-VFP support, but did not handle return values or alignment of double arguments in registers. This patch also adds tests for Thumb2 code generation for floating-point instructions and intrinsics, which previously only existed for ARM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216172 91177308-0d34-0410-b5e6-96231b3b80d8
107 lines
3.5 KiB
LLVM
107 lines
3.5 KiB
LLVM
; RUN: llc < %s -mtriple=armv7-linux-gnueabihf -o - | FileCheck %s
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; RUN: llc < %s -mtriple=thumbv7em-none-eabi -mcpu=cortex-m4 | FileCheck %s --check-prefix=CHECK-M4F
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
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define arm_aapcs_vfpcc void @test_1float({ float } %a) {
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call arm_aapcs_vfpcc void @test_1float({ float } { float 1.0 })
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ret void
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; CHECK-LABEL: test_1float:
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; CHECK-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK: bl test_1float
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; CHECK-M4F-LABEL: test_1float:
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; CHECK-M4F-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-M4F: bl test_1float
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}
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define arm_aapcs_vfpcc void @test_2float({ float, float } %a) {
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call arm_aapcs_vfpcc void @test_2float({ float, float } { float 1.0, float 2.0 })
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ret void
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; CHECK-LABEL: test_2float:
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; CHECK-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-DAG: vmov.f32 s1, #2.{{0+}}e+00
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; CHECK: bl test_2float
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; CHECK-M4F-LABEL: test_2float:
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; CHECK-M4F-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-M4F-DAG: vmov.f32 s1, #2.{{0+}}e+00
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; CHECK-M4F: bl test_2float
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}
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define arm_aapcs_vfpcc void @test_3float({ float, float, float } %a) {
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call arm_aapcs_vfpcc void @test_3float({ float, float, float } { float 1.0, float 2.0, float 3.0 })
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ret void
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; CHECK-LABEL: test_3float:
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; CHECK-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-DAG: vmov.f32 s1, #2.{{0+}}e+00
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; CHECK-DAG: vmov.f32 s2, #3.{{0+}}e+00
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; CHECK: bl test_3float
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; CHECK-M4F-LABEL: test_3float:
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; CHECK-M4F-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-M4F-DAG: vmov.f32 s1, #2.{{0+}}e+00
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; CHECK-M4F-DAG: vmov.f32 s2, #3.{{0+}}e+00
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; CHECK-M4F: bl test_3float
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}
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define arm_aapcs_vfpcc void @test_1double({ double } %a) {
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; CHECK-LABEL: test_1double:
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; CHECK-DAG: vmov.f64 d0, #1.{{0+}}e+00
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; CHECK: bl test_1double
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; CHECK-M4F-LABEL: test_1double:
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; CHECK-M4F: vldr d0, [[CP_LABEL:.*]]
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; CHECK-M4F: bl test_1double
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; CHECK-M4F: [[CP_LABEL]]
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; CHECK-M4F-NEXT: .long 0
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; CHECK-M4F-NEXT: .long 1072693248
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call arm_aapcs_vfpcc void @test_1double({ double } { double 1.0 })
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ret void
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}
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; Final double argument might be put in s15 & [sp] if we're careless. It should
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; go all on the stack.
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define arm_aapcs_vfpcc void @test_1double_nosplit([4 x float], [4 x double], [3 x float], double %a) {
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; CHECK-LABEL: test_1double_nosplit:
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; CHECK-DAG: mov [[ONELO:r[0-9]+]], #0
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; CHECK-DAG: movw [[ONEHI:r[0-9]+]], #0
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; CHECK-DAG: movt [[ONEHI]], #16368
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; CHECK: strd [[ONELO]], [[ONEHI]], [sp]
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; CHECK: bl test_1double_nosplit
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; CHECK-M4F-LABEL: test_1double_nosplit:
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; CHECK-M4F: movs [[ONEHI:r[0-9]+]], #0
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; CHECK-M4F: movs [[ONELO:r[0-9]+]], #0
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; CHECK-M4F: movt [[ONEHI]], #16368
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; CHECK-M4F: strd [[ONELO]], [[ONEHI]], [sp]
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; CHECK-M4F: bl test_1double_nosplit
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call arm_aapcs_vfpcc void @test_1double_nosplit([4 x float] undef, [4 x double] undef, [3 x float] undef, double 1.0)
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ret void
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}
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; Final double argument might go at [sp, #4] if we're careless. Should go at
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; [sp, #8] to preserve alignment.
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define arm_aapcs_vfpcc void @test_1double_misaligned([4 x double], [4 x double], float, double) {
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call arm_aapcs_vfpcc void @test_1double_misaligned([4 x double] undef, [4 x double] undef, float undef, double 1.0)
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; CHECK-LABEL: test_1double_misaligned:
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; CHECK-DAG: movw [[ONEHI:r[0-9]+]], #0
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; CHECK-DAG: mov [[ONELO:r[0-9]+]], #0
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; CHECK-DAG: movt [[ONEHI]], #16368
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; CHECK-DAG: strd [[ONELO]], [[ONEHI]], [sp, #8]
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; CHECK-M4F-LABEL: test_1double_misaligned:
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; CHECK-M4F: movs [[ONEHI:r[0-9]+]], #0
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; CHECK-M4F: movs [[ONELO:r[0-9]+]], #0
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; CHECK-M4F: movt [[ONEHI]], #16368
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; CHECK-M4F: strd [[ONELO]], [[ONEHI]], [sp, #8]
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; CHECK-M4F: bl test_1double_misaligned
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ret void
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}
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