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llvm-mirror/test/CodeGen/X86/sshl_sat.ll
Bevin Hansson 7c243aea4b [Intrinsic] Add sshl.sat/ushl.sat, saturated shift intrinsics. 
Summary:
This patch adds two intrinsics, llvm.sshl.sat and llvm.ushl.sat,
which perform signed and unsigned saturating left shift,
respectively.

These are useful for implementing the Embedded-C fixed point
support in Clang, originally discussed in
http://lists.llvm.org/pipermail/llvm-dev/2018-August/125433.html
and
http://lists.llvm.org/pipermail/cfe-dev/2018-May/058019.html

Reviewers: leonardchan, craig.topper, bjope, jdoerfert

Subscribers: hiraditya, jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D83216
2020-08-07 15:09:24 +02:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s --check-prefix=X64
; RUN: llc < %s -mtriple=i686 -mattr=cmov | FileCheck %s --check-prefix=X86
declare i4 @llvm.sshl.sat.i4 (i4, i4)
declare i8 @llvm.sshl.sat.i8 (i8, i8)
declare i15 @llvm.sshl.sat.i15 (i15, i15)
declare i16 @llvm.sshl.sat.i16 (i16, i16)
declare i18 @llvm.sshl.sat.i18 (i18, i18)
declare i32 @llvm.sshl.sat.i32 (i32, i32)
declare i64 @llvm.sshl.sat.i64 (i64, i64)
define i16 @func(i16 %x, i16 %y) nounwind {
; X64-LABEL: func:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: movl %edi, %edx
; X64-NEXT: shll %cl, %edx
; X64-NEXT: movswl %dx, %esi
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: sarl %cl, %esi
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: testw %di, %di
; X64-NEXT: sets %al
; X64-NEXT: addl $32767, %eax # imm = 0x7FFF
; X64-NEXT: cmpw %si, %di
; X64-NEXT: cmovel %edx, %eax
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
;
; X86-LABEL: func:
; X86: # %bb.0:
; X86-NEXT: pushl %edi
; X86-NEXT: pushl %esi
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movl %edx, %esi
; X86-NEXT: shll %cl, %esi
; X86-NEXT: movswl %si, %edi
; X86-NEXT: sarl %cl, %edi
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: testw %dx, %dx
; X86-NEXT: sets %al
; X86-NEXT: addl $32767, %eax # imm = 0x7FFF
; X86-NEXT: cmpw %di, %dx
; X86-NEXT: cmovel %esi, %eax
; X86-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NEXT: popl %esi
; X86-NEXT: popl %edi
; X86-NEXT: retl
%tmp = call i16 @llvm.sshl.sat.i16(i16 %x, i16 %y)
ret i16 %tmp
}
define i16 @func2(i8 %x, i8 %y) nounwind {
; X64-LABEL: func2:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: movsbl %dil, %eax
; X64-NEXT: addl %eax, %eax
; X64-NEXT: xorl %edx, %edx
; X64-NEXT: testw %ax, %ax
; X64-NEXT: sets %dl
; X64-NEXT: addl $32767, %edx # imm = 0x7FFF
; X64-NEXT: movl %eax, %esi
; X64-NEXT: shll %cl, %esi
; X64-NEXT: movswl %si, %edi
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: sarl %cl, %edi
; X64-NEXT: cmpw %di, %ax
; X64-NEXT: cmovnel %edx, %esi
; X64-NEXT: movswl %si, %eax
; X64-NEXT: shrl %eax
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
;
; X86-LABEL: func2:
; X86: # %bb.0:
; X86-NEXT: pushl %edi
; X86-NEXT: pushl %esi
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movsbl {{[0-9]+}}(%esp), %edx
; X86-NEXT: addl %edx, %edx
; X86-NEXT: movl %edx, %esi
; X86-NEXT: shll %cl, %esi
; X86-NEXT: movswl %si, %edi
; X86-NEXT: sarl %cl, %edi
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: testw %dx, %dx
; X86-NEXT: sets %al
; X86-NEXT: addl $32767, %eax # imm = 0x7FFF
; X86-NEXT: cmpw %di, %dx
; X86-NEXT: cmovel %esi, %eax
; X86-NEXT: cwtl
; X86-NEXT: shrl %eax
; X86-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NEXT: popl %esi
; X86-NEXT: popl %edi
; X86-NEXT: retl
%x2 = sext i8 %x to i15
%y2 = sext i8 %y to i15
%tmp = call i15 @llvm.sshl.sat.i15(i15 %x2, i15 %y2)
%tmp2 = sext i15 %tmp to i16
ret i16 %tmp2
}
define i16 @func3(i15 %x, i8 %y) nounwind {
; X64-LABEL: func3:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: shll $7, %ecx
; X64-NEXT: addl %edi, %edi
; X64-NEXT: movl %edi, %eax
; X64-NEXT: shll %cl, %eax
; X64-NEXT: movswl %ax, %edx
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: sarl %cl, %edx
; X64-NEXT: xorl %ecx, %ecx
; X64-NEXT: testw %di, %di
; X64-NEXT: sets %cl
; X64-NEXT: addl $32767, %ecx # imm = 0x7FFF
; X64-NEXT: cmpw %dx, %di
; X64-NEXT: cmovel %eax, %ecx
; X64-NEXT: movswl %cx, %eax
; X64-NEXT: shrl %eax
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
;
; X86-LABEL: func3:
; X86: # %bb.0:
; X86-NEXT: pushl %edi
; X86-NEXT: pushl %esi
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: shll $7, %ecx
; X86-NEXT: addl %edx, %edx
; X86-NEXT: movl %edx, %esi
; X86-NEXT: shll %cl, %esi
; X86-NEXT: movswl %si, %edi
; X86-NEXT: # kill: def $cl killed $cl killed $ecx
; X86-NEXT: sarl %cl, %edi
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: testw %dx, %dx
; X86-NEXT: sets %al
; X86-NEXT: addl $32767, %eax # imm = 0x7FFF
; X86-NEXT: cmpw %di, %dx
; X86-NEXT: cmovel %esi, %eax
; X86-NEXT: cwtl
; X86-NEXT: shrl %eax
; X86-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NEXT: popl %esi
; X86-NEXT: popl %edi
; X86-NEXT: retl
%y2 = sext i8 %y to i15
%y3 = shl i15 %y2, 7
%tmp = call i15 @llvm.sshl.sat.i15(i15 %x, i15 %y3)
%tmp2 = sext i15 %tmp to i16
ret i16 %tmp2
}
define i4 @func4(i4 %x, i4 %y) nounwind {
; X64-LABEL: func4:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: andb $15, %cl
; X64-NEXT: shlb $4, %dil
; X64-NEXT: movl %edi, %eax
; X64-NEXT: shlb %cl, %al
; X64-NEXT: movzbl %al, %esi
; X64-NEXT: movl %esi, %edx
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: sarb %cl, %dl
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: testb %dil, %dil
; X64-NEXT: sets %al
; X64-NEXT: addl $127, %eax
; X64-NEXT: cmpb %dl, %dil
; X64-NEXT: cmovel %esi, %eax
; X64-NEXT: sarb $4, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
;
; X86-LABEL: func4:
; X86: # %bb.0:
; X86-NEXT: pushl %esi
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: andb $15, %cl
; X86-NEXT: movb {{[0-9]+}}(%esp), %dl
; X86-NEXT: shlb $4, %dl
; X86-NEXT: movb %dl, %ch
; X86-NEXT: shlb %cl, %ch
; X86-NEXT: movzbl %ch, %esi
; X86-NEXT: sarb %cl, %ch
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: testb %dl, %dl
; X86-NEXT: sets %al
; X86-NEXT: addl $127, %eax
; X86-NEXT: cmpb %ch, %dl
; X86-NEXT: cmovel %esi, %eax
; X86-NEXT: sarb $4, %al
; X86-NEXT: # kill: def $al killed $al killed $eax
; X86-NEXT: popl %esi
; X86-NEXT: retl
%tmp = call i4 @llvm.sshl.sat.i4(i4 %x, i4 %y)
ret i4 %tmp
}
define i64 @func5(i64 %x, i64 %y) nounwind {
; X64-LABEL: func5:
; X64: # %bb.0:
; X64-NEXT: movq %rsi, %rcx
; X64-NEXT: xorl %edx, %edx
; X64-NEXT: testq %rdi, %rdi
; X64-NEXT: sets %dl
; X64-NEXT: movabsq $9223372036854775807, %rax # imm = 0x7FFFFFFFFFFFFFFF
; X64-NEXT: addq %rdx, %rax
; X64-NEXT: movq %rdi, %rdx
; X64-NEXT: shlq %cl, %rdx
; X64-NEXT: movq %rdx, %rsi
; X64-NEXT: # kill: def $cl killed $cl killed $rcx
; X64-NEXT: sarq %cl, %rsi
; X64-NEXT: cmpq %rsi, %rdi
; X64-NEXT: cmoveq %rdx, %rax
; X64-NEXT: retq
;
; X86-LABEL: func5:
; X86: # %bb.0:
; X86-NEXT: pushl %ebp
; X86-NEXT: pushl %ebx
; X86-NEXT: pushl %edi
; X86-NEXT: pushl %esi
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ebx
; X86-NEXT: movl %eax, %ebp
; X86-NEXT: shll %cl, %ebp
; X86-NEXT: shldl %cl, %eax, %ebx
; X86-NEXT: xorl %edx, %edx
; X86-NEXT: testb $32, %cl
; X86-NEXT: cmovnel %ebp, %ebx
; X86-NEXT: cmovnel %edx, %ebp
; X86-NEXT: movl %ebx, %edx
; X86-NEXT: sarl %cl, %edx
; X86-NEXT: movl %ebx, %edi
; X86-NEXT: sarl $31, %edi
; X86-NEXT: testb $32, %cl
; X86-NEXT: cmovel %edx, %edi
; X86-NEXT: movl %ebp, %esi
; X86-NEXT: shrdl %cl, %ebx, %esi
; X86-NEXT: testb $32, %cl
; X86-NEXT: cmovnel %edx, %esi
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: xorl %ecx, %edi
; X86-NEXT: xorl %eax, %esi
; X86-NEXT: xorl %edx, %edx
; X86-NEXT: testl %ecx, %ecx
; X86-NEXT: movl $-1, %eax
; X86-NEXT: movl $0, %ecx
; X86-NEXT: cmovsl %ecx, %eax
; X86-NEXT: sets %dl
; X86-NEXT: addl $2147483647, %edx # imm = 0x7FFFFFFF
; X86-NEXT: orl %edi, %esi
; X86-NEXT: cmovel %ebp, %eax
; X86-NEXT: cmovel %ebx, %edx
; X86-NEXT: popl %esi
; X86-NEXT: popl %edi
; X86-NEXT: popl %ebx
; X86-NEXT: popl %ebp
; X86-NEXT: retl
%tmp = call i64 @llvm.sshl.sat.i64(i64 %x, i64 %y)
ret i64 %tmp
}
define i18 @func6(i16 %x, i16 %y) nounwind {
; X64-LABEL: func6:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: movswl %di, %edx
; X64-NEXT: shll $14, %edx
; X64-NEXT: movl %edx, %esi
; X64-NEXT: shll %cl, %esi
; X64-NEXT: movl %esi, %edi
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: sarl %cl, %edi
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: testl %edx, %edx
; X64-NEXT: sets %al
; X64-NEXT: addl $2147483647, %eax # imm = 0x7FFFFFFF
; X64-NEXT: cmpl %edi, %edx
; X64-NEXT: cmovel %esi, %eax
; X64-NEXT: sarl $14, %eax
; X64-NEXT: retq
;
; X86-LABEL: func6:
; X86: # %bb.0:
; X86-NEXT: pushl %edi
; X86-NEXT: pushl %esi
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movswl {{[0-9]+}}(%esp), %edx
; X86-NEXT: shll $14, %edx
; X86-NEXT: movl %edx, %esi
; X86-NEXT: shll %cl, %esi
; X86-NEXT: movl %esi, %edi
; X86-NEXT: sarl %cl, %edi
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: testl %edx, %edx
; X86-NEXT: sets %al
; X86-NEXT: addl $2147483647, %eax # imm = 0x7FFFFFFF
; X86-NEXT: cmpl %edi, %edx
; X86-NEXT: cmovel %esi, %eax
; X86-NEXT: sarl $14, %eax
; X86-NEXT: popl %esi
; X86-NEXT: popl %edi
; X86-NEXT: retl
%x2 = sext i16 %x to i18
%y2 = sext i16 %y to i18
%tmp = call i18 @llvm.sshl.sat.i18(i18 %x2, i18 %y2)
ret i18 %tmp
}
define i32 @func7(i32 %x, i32 %y) nounwind {
; X64-LABEL: func7:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: movl %edi, %edx
; X64-NEXT: shll %cl, %edx
; X64-NEXT: movl %edx, %esi
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: sarl %cl, %esi
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: testl %edi, %edi
; X64-NEXT: sets %al
; X64-NEXT: addl $2147483647, %eax # imm = 0x7FFFFFFF
; X64-NEXT: cmpl %esi, %edi
; X64-NEXT: cmovel %edx, %eax
; X64-NEXT: retq
;
; X86-LABEL: func7:
; X86: # %bb.0:
; X86-NEXT: pushl %edi
; X86-NEXT: pushl %esi
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: movl %edx, %esi
; X86-NEXT: shll %cl, %esi
; X86-NEXT: movl %esi, %edi
; X86-NEXT: sarl %cl, %edi
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: testl %edx, %edx
; X86-NEXT: sets %al
; X86-NEXT: addl $2147483647, %eax # imm = 0x7FFFFFFF
; X86-NEXT: cmpl %edi, %edx
; X86-NEXT: cmovel %esi, %eax
; X86-NEXT: popl %esi
; X86-NEXT: popl %edi
; X86-NEXT: retl
%tmp = call i32 @llvm.sshl.sat.i32(i32 %x, i32 %y)
ret i32 %tmp
}
define i8 @func8(i8 %x, i8 %y) nounwind {
; X64-LABEL: func8:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: movl %edi, %eax
; X64-NEXT: shlb %cl, %al
; X64-NEXT: movzbl %al, %esi
; X64-NEXT: movl %esi, %edx
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: sarb %cl, %dl
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: testb %dil, %dil
; X64-NEXT: sets %al
; X64-NEXT: addl $127, %eax
; X64-NEXT: cmpb %dl, %dil
; X64-NEXT: cmovel %esi, %eax
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
;
; X86-LABEL: func8:
; X86: # %bb.0:
; X86-NEXT: pushl %esi
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movb {{[0-9]+}}(%esp), %dl
; X86-NEXT: movb %dl, %ch
; X86-NEXT: shlb %cl, %ch
; X86-NEXT: movzbl %ch, %esi
; X86-NEXT: sarb %cl, %ch
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: testb %dl, %dl
; X86-NEXT: sets %al
; X86-NEXT: addl $127, %eax
; X86-NEXT: cmpb %ch, %dl
; X86-NEXT: cmovel %esi, %eax
; X86-NEXT: # kill: def $al killed $al killed $eax
; X86-NEXT: popl %esi
; X86-NEXT: retl
%tmp = call i8 @llvm.sshl.sat.i8(i8 %x, i8 %y)
ret i8 %tmp
}
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