152 lines
4.7 KiB
LLVM
152 lines
4.7 KiB
LLVM
; Check that scalar FP conversions to signed and unsigned int64 are using
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; reasonable sequences, across platforms and target switches.
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;
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; The signed case is straight forward, and the tests here basically
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; ensure successful compilation (f80 with avx512 was broken at one point).
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;
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; For the unsigned case there are many possible sequences, so to avoid
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; a fragile test we just check for the presence of a few key instructions.
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; AVX512 on Intel64 can use vcvtts[ds]2usi directly for float and double.
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; Otherwise the sequence will involve an FP subtract (fsub, subss or subsd),
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; and a truncating conversion (cvtts[ds]2si, fisttp, or fnstcw+fist). When
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; both a subtract and fnstcw are needed, they can occur in either order.
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;
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; The interesting subtargets are AVX512F (vcvtts[ds]2usi), SSE3 (fisttp),
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; SSE2 (cvtts[ds]2si) and vanilla X87 (fnstcw+fist, 32-bit only).
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;
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; RUN: llc < %s -mtriple=i386-pc-windows-msvc -mattr=+avx512f | FileCheck %s --check-prefix=CHECK --check-prefix=AVX512_32
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; RUN: llc < %s -mtriple=i386-unknown-linux-gnu -mattr=+avx512f | FileCheck %s --check-prefix=CHECK --check-prefix=AVX512_32
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; RUN: llc < %s -mtriple=x86_64-pc-windows-msvc -mattr=+avx512f | FileCheck %s --check-prefix=CHECK --check-prefix=AVX512_64
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; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=+avx512f | FileCheck %s --check-prefix=CHECK --check-prefix=AVX512_64
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; RUN: llc < %s -mtriple=i386-pc-windows-msvc -mattr=+sse3 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE3_32
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; RUN: llc < %s -mtriple=i386-unknown-linux-gnu -mattr=+sse3 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE3_32
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; RUN: llc < %s -mtriple=x86_64-pc-windows-msvc -mattr=+sse3 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE3_64
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; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=+sse3 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE3_64
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; RUN: llc < %s -mtriple=i386-pc-windows-msvc -mattr=+sse2 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE2_32
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; RUN: llc < %s -mtriple=i386-unknown-linux-gnu -mattr=+sse2 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE2_32
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; RUN: llc < %s -mtriple=x86_64-pc-windows-msvc -mattr=+sse2 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE2_64
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; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=+sse2 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE2_64
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; RUN: llc < %s -mtriple=i386-pc-windows-msvc -mattr=-sse | FileCheck %s --check-prefix=CHECK --check-prefix=X87
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; RUN: llc < %s -mtriple=i386-unknown-linux-gnu -mattr=-sse | FileCheck %s --check-prefix=CHECK --check-prefix=X87
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; CHECK-LABEL: f_to_u64
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; X87-DAG: fsub
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; X87-DAG: fnstcw
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; X87: fist
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; SSE2_32-DAG: {{subss|fsub}}
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; SSE2_32-DAG: fnstcw
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; SSE2_32: fist
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; SSE2_64: subss
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; SSE2_64: cvttss2si
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; SSE3_32: {{subss|fsub}}
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; SSE3_32: fistt
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; SSE3_64: subss
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; SSE3_64: cvttss2si
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; AVX512_32: {{subss|fsub}}
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; AVX512_32: fistt
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; AVX512_64: vcvttss2usi
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; CHECK: ret
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define i64 @f_to_u64(float %a) nounwind {
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%r = fptoui float %a to i64
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ret i64 %r
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}
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; CHECK-LABEL: f_to_s64
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; X87: fnstcw
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; X87: fist
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; SSE2_32: fnstcw
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; SSE2_32: fist
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; SSE2_64: cvttss2si
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; SSE3_32: fistt
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; SSE3_64: cvttss2si
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; AVX512_32: fistt
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; AVX512_64: vcvttss2si
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; CHECK: ret
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define i64 @f_to_s64(float %a) nounwind {
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%r = fptosi float %a to i64
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ret i64 %r
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}
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; CHECK-LABEL: d_to_u64
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; X87-DAG: fsub
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; X87-DAG: fnstcw
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; X87: fist
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; SSE2_32-DAG: {{subsd|fsub}}
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; SSE2_32-DAG: fnstcw
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; SSE2_32: fist
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; SSE2_64: subsd
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; SSE2_64: cvttsd2si
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; SSE3_32: {{subsd|fsub}}
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; SSE3_32: fistt
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; SSE3_64: subsd
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; SSE3_64: cvttsd2si
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; AVX512_32: {{subsd|fsub}}
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; AVX512_32: fistt
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; AVX512_64: vcvttsd2usi
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; CHECK: ret
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define i64 @d_to_u64(double %a) nounwind {
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%r = fptoui double %a to i64
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ret i64 %r
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}
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; CHECK-LABEL: d_to_s64
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; X87: fnstcw
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; X87: fist
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; SSE2_32: fnstcw
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; SSE2_32: fist
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; SSE2_64: cvttsd2si
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; SSE3_32: fistt
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; SSE3_64: cvttsd2si
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; AVX512_32: fistt
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; AVX512_64: vcvttsd2si
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; CHECK: ret
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define i64 @d_to_s64(double %a) nounwind {
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%r = fptosi double %a to i64
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ret i64 %r
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}
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; CHECK-LABEL: x_to_u64
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; CHECK-DAG: fsub
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; X87-DAG: fnstcw
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; SSE2_32-DAG: fnstcw
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; SSE2_64-DAG: fnstcw
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; CHECK: fist
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; CHECK: ret
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define i64 @x_to_u64(x86_fp80 %a) nounwind {
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%r = fptoui x86_fp80 %a to i64
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ret i64 %r
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}
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; CHECK-LABEL: x_to_s64
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; X87: fnstcw
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; X87: fist
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; SSE2_32: fnstcw
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; SSE2_32: fist
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; SSE2_64: fnstcw
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; SSE2_64: fist
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; SSE3_32: fistt
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; SSE3_64: fistt
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; AVX512_32: fistt
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; AVX512_64: fistt
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; CHECK: ret
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define i64 @x_to_s64(x86_fp80 %a) nounwind {
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%r = fptosi x86_fp80 %a to i64
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ret i64 %r
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}
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; CHECK-LABEL: t_to_u64
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; CHECK: __fixunstfdi
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; CHECK: ret
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define i64 @t_to_u64(fp128 %a) nounwind {
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%r = fptoui fp128 %a to i64
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ret i64 %r
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}
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; CHECK-LABEL: t_to_s64
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; CHECK: __fixtfdi
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; CHECK: ret
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define i64 @t_to_s64(fp128 %a) nounwind {
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%r = fptosi fp128 %a to i64
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ret i64 %r
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}
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