derek.holloway
7502bf64a4
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62 lines
1.8 KiB
LLVM
62 lines
1.8 KiB
LLVM
; RUN: llc -mtriple=mipsel-linux-gnu -mcpu=mips32 -mattr=+mips16 -verify-machineinstrs < %s | FileCheck %s -check-prefixes=MIPS16
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define i32 @cttz_i32(i32 %a) {
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; MIPS16-LABEL: cttz_i32:
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; MIPS16: # %bb.0: # %entry
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; MIPS16-NEXT: not $2, $4
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; MIPS16-NEXT: addiu $4, -1 # 16 bit inst
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; MIPS16-NEXT: and $4, $2
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; MIPS16-NEXT: srl $2, $4, 1
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; MIPS16-NEXT: lw $3, $CPI0_0 # 16 bit inst
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; MIPS16-NEXT: and $3, $2
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; MIPS16-NEXT: subu $2, $4, $3
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; MIPS16-NEXT: lw $3, $CPI0_1 # 16 bit inst
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; MIPS16-NEXT: srl $4, $2, 2
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; MIPS16-NEXT: and $2, $3
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; MIPS16-NEXT: and $4, $3
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; MIPS16-NEXT: addu $2, $2, $4
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; MIPS16-NEXT: srl $3, $2, 4
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; MIPS16-NEXT: addu $2, $2, $3
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; MIPS16-NEXT: lw $3, $CPI0_2 # 16 bit inst
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; MIPS16-NEXT: and $3, $2
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; MIPS16-NEXT: lw $2, $CPI0_3 # 16 bit inst
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; MIPS16-NEXT: mult $3, $2
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; MIPS16-NEXT: mflo $2
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; MIPS16-NEXT: srl $2, $2, 24
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; MIPS16-NEXT: jrc $ra
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entry:
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%0 = call i32 @llvm.cttz.i32(i32 %a, i1 false)
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ret i32 %0
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}
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declare i32 @llvm.cttz.i32(i32, i1 immarg)
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define i64 @cttz_i64(i64 %a) {
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; MIPS16-LABEL: cttz_i64:
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; MIPS16: # %bb.1: # %entry
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; MIPS16-NEXT: not $4, $5
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; MIPS16-NEXT: addiu $5, -1 # 16 bit inst
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; MIPS16-NEXT: and $5, $4
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; MIPS16-NEXT: srl $4, $5, 1
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; MIPS16-NEXT: and $4, $7
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; MIPS16-NEXT: subu $4, $5, $4
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; MIPS16-NEXT: srl $5, $4, 2
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; MIPS16-NEXT: and $4, $6
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; MIPS16-NEXT: and $5, $6
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; MIPS16-NEXT: addu $4, $4, $5
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; MIPS16-NEXT: srl $5, $4, 4
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; MIPS16-NEXT: addu $4, $4, $5
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; MIPS16-NEXT: and $4, $3
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; MIPS16-NEXT: mult $4, $2
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; MIPS16-NEXT: mflo $2
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; MIPS16-NEXT: srl $2, $2, 24
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; MIPS16-NEXT: addiu $2, 32 # 16 bit inst
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; MIPS16-NEXT: li $3, 0
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; MIPS16-NEXT: jrc $ra
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entry:
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%0 = call i64 @llvm.cttz.i64(i64 %a, i1 false)
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ret i64 %0
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}
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declare i64 @llvm.cttz.i64(i64, i1 immarg)
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