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https://github.com/c64scene-ar/llvm-6502.git
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ae3a0be92e
integer and floating-point opcodes, introducing FAdd, FSub, and FMul. For now, the AsmParser, BitcodeReader, and IRBuilder all preserve backwards compatability, and the Core LLVM APIs preserve backwards compatibility for IR producers. Most front-ends won't need to change immediately. This implements the first step of the plan outlined here: http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72897 91177308-0d34-0410-b5e6-96231b3b80d8
32 lines
1.2 KiB
LLVM
32 lines
1.2 KiB
LLVM
; RUN: llvm-as < %s | llc -march=x86
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin8"
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define hidden float @__floatundisf(i64 %u) nounwind readnone {
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entry:
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%0 = icmp ugt i64 %u, 9007199254740991 ; <i1> [#uses=1]
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br i1 %0, label %bb, label %bb2
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bb: ; preds = %entry
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%1 = and i64 %u, 2047 ; <i64> [#uses=1]
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%2 = icmp eq i64 %1, 0 ; <i1> [#uses=1]
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br i1 %2, label %bb2, label %bb1
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bb1: ; preds = %bb
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%3 = or i64 %u, 2048 ; <i64> [#uses=1]
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%4 = and i64 %3, -2048 ; <i64> [#uses=1]
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br label %bb2
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bb2: ; preds = %bb1, %bb, %entry
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%u_addr.0 = phi i64 [ %4, %bb1 ], [ %u, %entry ], [ %u, %bb ] ; <i64> [#uses=2]
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%5 = lshr i64 %u_addr.0, 32 ; <i64> [#uses=1]
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%6 = trunc i64 %5 to i32 ; <i32> [#uses=1]
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%7 = uitofp i32 %6 to double ; <double> [#uses=1]
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%8 = fmul double %7, 0x41F0000000000000 ; <double> [#uses=1]
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%9 = trunc i64 %u_addr.0 to i32 ; <i32> [#uses=1]
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%10 = uitofp i32 %9 to double ; <double> [#uses=1]
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%11 = fadd double %10, %8 ; <double> [#uses=1]
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%12 = fptrunc double %11 to float ; <float> [#uses=1]
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ret float %12
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}
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