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<title>nativeGen/SPARC/CodeGen/Expand.hs</title>
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<pre><a name="line-1"></a>
<a name="line-2"></a><span class='hs-comment'>-- | Expand out synthetic instructions into single machine instrs.</span>
<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>SPARC</span><span class='hs-varop'>.</span><span class='hs-conid'>CodeGen</span><span class='hs-varop'>.</span><span class='hs-conid'>Expand</span> <span class='hs-layout'>(</span>
<a name="line-4"></a> <span class='hs-varid'>expandTop</span>
<a name="line-5"></a><span class='hs-layout'>)</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-keyword'>where</span>
<a name="line-8"></a>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>SPARC</span><span class='hs-varop'>.</span><span class='hs-conid'>Instr</span>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>SPARC</span><span class='hs-varop'>.</span><span class='hs-conid'>Imm</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>SPARC</span><span class='hs-varop'>.</span><span class='hs-conid'>AddrMode</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>SPARC</span><span class='hs-varop'>.</span><span class='hs-conid'>Regs</span>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>SPARC</span><span class='hs-varop'>.</span><span class='hs-conid'>Ppr</span> <span class='hs-conid'>()</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Instruction</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Reg</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Size</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Cmm</span>
<a name="line-18"></a>
<a name="line-19"></a>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Outputable</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>OrdList</span>
<a name="line-22"></a>
<a name="line-23"></a><a name="expandTop"></a><span class='hs-comment'>-- | Expand out synthetic instructions in this top level thing</span>
<a name="line-24"></a><span class='hs-definition'>expandTop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NatCmmTop</span> <span class='hs-conid'>Instr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NatCmmTop</span> <span class='hs-conid'>Instr</span>
<a name="line-25"></a><span class='hs-definition'>expandTop</span> <span class='hs-varid'>top</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>CmmData</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-26"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>top</span>
<a name="line-27"></a>
<a name="line-28"></a><span class='hs-definition'>expandTop</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmProc</span> <span class='hs-varid'>info</span> <span class='hs-varid'>lbl</span> <span class='hs-varid'>params</span> <span class='hs-layout'>(</span><span class='hs-conid'>ListGraph</span> <span class='hs-varid'>blocks</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-29"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CmmProc</span> <span class='hs-varid'>info</span> <span class='hs-varid'>lbl</span> <span class='hs-varid'>params</span> <span class='hs-layout'>(</span><span class='hs-conid'>ListGraph</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>expandBlock</span> <span class='hs-varid'>blocks</span><span class='hs-layout'>)</span>
<a name="line-30"></a>
<a name="line-31"></a>
<a name="line-32"></a><a name="expandBlock"></a><span class='hs-comment'>-- | Expand out synthetic instructions in this block</span>
<a name="line-33"></a><span class='hs-definition'>expandBlock</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NatBasicBlock</span> <span class='hs-conid'>Instr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NatBasicBlock</span> <span class='hs-conid'>Instr</span>
<a name="line-34"></a>
<a name="line-35"></a><span class='hs-definition'>expandBlock</span> <span class='hs-layout'>(</span><span class='hs-conid'>BasicBlock</span> <span class='hs-varid'>label</span> <span class='hs-varid'>instrs</span><span class='hs-layout'>)</span>
<a name="line-36"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>instrs_ol</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>expandBlockInstrs</span> <span class='hs-varid'>instrs</span>
<a name="line-37"></a> <span class='hs-varid'>instrs'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromOL</span> <span class='hs-varid'>instrs_ol</span>
<a name="line-38"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>BasicBlock</span> <span class='hs-varid'>label</span> <span class='hs-varid'>instrs'</span>
<a name="line-39"></a>
<a name="line-40"></a>
<a name="line-41"></a><a name="expandBlockInstrs"></a><span class='hs-comment'>-- | Expand out some instructions</span>
<a name="line-42"></a><span class='hs-definition'>expandBlockInstrs</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Instr</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OrdList</span> <span class='hs-conid'>Instr</span>
<a name="line-43"></a><span class='hs-definition'>expandBlockInstrs</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nilOL</span>
<a name="line-44"></a>
<a name="line-45"></a><span class='hs-definition'>expandBlockInstrs</span> <span class='hs-layout'>(</span><span class='hs-varid'>ii</span><span class='hs-conop'>:</span><span class='hs-varid'>is</span><span class='hs-layout'>)</span>
<a name="line-46"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>ii_doubleRegs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>remapRegPair</span> <span class='hs-varid'>ii</span>
<a name="line-47"></a> <span class='hs-varid'>is_misaligned</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>expandMisalignedDoubles</span> <span class='hs-varid'>ii_doubleRegs</span>
<a name="line-48"></a>
<a name="line-49"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>is_misaligned</span> <span class='hs-varop'>`appOL`</span> <span class='hs-varid'>expandBlockInstrs</span> <span class='hs-varid'>is</span>
<a name="line-50"></a>
<a name="line-51"></a>
<a name="line-52"></a>
<a name="line-53"></a><a name="remapRegPair"></a><span class='hs-comment'>-- | In the SPARC instruction set the FP register pairs that are used</span>
<a name="line-54"></a><span class='hs-comment'>-- to hold 64 bit floats are refered to by just the first reg </span>
<a name="line-55"></a><span class='hs-comment'>-- of the pair. Remap our internal reg pairs to the appropriate reg.</span>
<a name="line-56"></a><span class='hs-comment'>--</span>
<a name="line-57"></a><span class='hs-comment'>-- For example:</span>
<a name="line-58"></a><span class='hs-comment'>-- ldd [%l1], (%f0 | %f1)</span>
<a name="line-59"></a><span class='hs-comment'>--</span>
<a name="line-60"></a><span class='hs-comment'>-- gets mapped to</span>
<a name="line-61"></a><span class='hs-comment'>-- ldd [$l1], %f0</span>
<a name="line-62"></a><span class='hs-comment'>--</span>
<a name="line-63"></a><span class='hs-definition'>remapRegPair</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Instr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Instr</span>
<a name="line-64"></a><span class='hs-definition'>remapRegPair</span> <span class='hs-varid'>instr</span>
<a name="line-65"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>patchF</span> <span class='hs-varid'>reg</span>
<a name="line-66"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>reg</span> <span class='hs-keyword'>of</span>
<a name="line-67"></a> <span class='hs-conid'>RegReal</span> <span class='hs-layout'>(</span><span class='hs-conid'>RealRegSingle</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span>
<a name="line-68"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>reg</span>
<a name="line-69"></a>
<a name="line-70"></a> <span class='hs-conid'>RegReal</span> <span class='hs-layout'>(</span><span class='hs-conid'>RealRegPair</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>r2</span><span class='hs-layout'>)</span>
<a name="line-71"></a>
<a name="line-72"></a> <span class='hs-comment'>-- sanity checking</span>
<a name="line-73"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>r1</span> <span class='hs-varop'>>=</span> <span class='hs-num'>32</span>
<a name="line-74"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>r1</span> <span class='hs-varop'><=</span> <span class='hs-num'>63</span>
<a name="line-75"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>r1</span> <span class='hs-varop'>`mod`</span> <span class='hs-num'>2</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span>
<a name="line-76"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>r2</span> <span class='hs-varop'>==</span> <span class='hs-varid'>r1</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span>
<a name="line-77"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RegReal</span> <span class='hs-layout'>(</span><span class='hs-conid'>RealRegSingle</span> <span class='hs-varid'>r1</span><span class='hs-layout'>)</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span>
<a name="line-80"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pprPanic</span> <span class='hs-str'>"SPARC.CodeGen.Expand: not remapping dodgy looking reg pair "</span> <span class='hs-layout'>(</span><span class='hs-varid'>ppr</span> <span class='hs-varid'>reg</span><span class='hs-layout'>)</span>
<a name="line-81"></a>
<a name="line-82"></a> <span class='hs-conid'>RegVirtual</span> <span class='hs-keyword'>_</span>
<a name="line-83"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pprPanic</span> <span class='hs-str'>"SPARC.CodeGen.Expand: not remapping virtual reg "</span> <span class='hs-layout'>(</span><span class='hs-varid'>ppr</span> <span class='hs-varid'>reg</span><span class='hs-layout'>)</span>
<a name="line-84"></a>
<a name="line-85"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>patchRegsOfInstr</span> <span class='hs-varid'>instr</span> <span class='hs-varid'>patchF</span>
<a name="line-86"></a>
<a name="line-87"></a>
<a name="line-88"></a>
<a name="line-89"></a>
<a name="line-90"></a><a name="expandMisalignedDoubles"></a><span class='hs-comment'>-- Expand out 64 bit load/stores into individual instructions to handle</span>
<a name="line-91"></a><span class='hs-comment'>-- possible double alignment problems.</span>
<a name="line-92"></a><span class='hs-comment'>--</span>
<a name="line-93"></a><span class='hs-comment'>-- TODO: It'd be better to use a scratch reg instead of the add/sub thing.</span>
<a name="line-94"></a><span class='hs-comment'>-- We might be able to do this faster if we use the UA2007 instr set</span>
<a name="line-95"></a><span class='hs-comment'>-- instead of restricting ourselves to SPARC V9.</span>
<a name="line-96"></a><span class='hs-comment'>--</span>
<a name="line-97"></a><span class='hs-definition'>expandMisalignedDoubles</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Instr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OrdList</span> <span class='hs-conid'>Instr</span>
<a name="line-98"></a><span class='hs-definition'>expandMisalignedDoubles</span> <span class='hs-varid'>instr</span>
<a name="line-99"></a>
<a name="line-100"></a> <span class='hs-comment'>-- Translate to:</span>
<a name="line-101"></a> <span class='hs-comment'>-- add g1,g2,g1</span>
<a name="line-102"></a> <span class='hs-comment'>-- ld [g1],%fn</span>
<a name="line-103"></a> <span class='hs-comment'>-- ld [g1+4],%f(n+1)</span>
<a name="line-104"></a> <span class='hs-comment'>-- sub g1,g2,g1 -- to restore g1</span>
<a name="line-105"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LD</span> <span class='hs-conid'>FF64</span> <span class='hs-layout'>(</span><span class='hs-conid'>AddrRegReg</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>r2</span><span class='hs-layout'>)</span> <span class='hs-varid'>fReg</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instr</span>
<a name="line-106"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toOL</span> <span class='hs-keyglyph'>[</span> <span class='hs-conid'>ADD</span> <span class='hs-conid'>False</span> <span class='hs-conid'>False</span> <span class='hs-varid'>r1</span> <span class='hs-layout'>(</span><span class='hs-conid'>RIReg</span> <span class='hs-varid'>r2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r1</span>
<a name="line-107"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>LD</span> <span class='hs-conid'>FF32</span> <span class='hs-layout'>(</span><span class='hs-conid'>AddrRegReg</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>g0</span><span class='hs-layout'>)</span> <span class='hs-varid'>fReg</span>
<a name="line-108"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>LD</span> <span class='hs-conid'>FF32</span> <span class='hs-layout'>(</span><span class='hs-conid'>AddrRegImm</span> <span class='hs-varid'>r1</span> <span class='hs-layout'>(</span><span class='hs-conid'>ImmInt</span> <span class='hs-num'>4</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fRegHi</span> <span class='hs-varid'>fReg</span><span class='hs-layout'>)</span>
<a name="line-109"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>SUB</span> <span class='hs-conid'>False</span> <span class='hs-conid'>False</span> <span class='hs-varid'>r1</span> <span class='hs-layout'>(</span><span class='hs-conid'>RIReg</span> <span class='hs-varid'>r2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r1</span> <span class='hs-keyglyph'>]</span>
<a name="line-110"></a>
<a name="line-111"></a> <span class='hs-comment'>-- Translate to</span>
<a name="line-112"></a> <span class='hs-comment'>-- ld [addr],%fn</span>
<a name="line-113"></a> <span class='hs-comment'>-- ld [addr+4],%f(n+1)</span>
<a name="line-114"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LD</span> <span class='hs-conid'>FF64</span> <span class='hs-varid'>addr</span> <span class='hs-varid'>fReg</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instr</span>
<a name="line-115"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>addr'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addrOffset</span> <span class='hs-varid'>addr</span> <span class='hs-num'>4</span>
<a name="line-116"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>toOL</span> <span class='hs-keyglyph'>[</span> <span class='hs-conid'>LD</span> <span class='hs-conid'>FF32</span> <span class='hs-varid'>addr</span> <span class='hs-varid'>fReg</span>
<a name="line-117"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>LD</span> <span class='hs-conid'>FF32</span> <span class='hs-varid'>addr'</span> <span class='hs-layout'>(</span><span class='hs-varid'>fRegHi</span> <span class='hs-varid'>fReg</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span>
<a name="line-118"></a>
<a name="line-119"></a> <span class='hs-comment'>-- Translate to:</span>
<a name="line-120"></a> <span class='hs-comment'>-- add g1,g2,g1</span>
<a name="line-121"></a> <span class='hs-comment'>-- st %fn,[g1]</span>
<a name="line-122"></a> <span class='hs-comment'>-- st %f(n+1),[g1+4]</span>
<a name="line-123"></a> <span class='hs-comment'>-- sub g1,g2,g1 -- to restore g1</span>
<a name="line-124"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ST</span> <span class='hs-conid'>FF64</span> <span class='hs-varid'>fReg</span> <span class='hs-layout'>(</span><span class='hs-conid'>AddrRegReg</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>r2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instr</span>
<a name="line-125"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toOL</span> <span class='hs-keyglyph'>[</span> <span class='hs-conid'>ADD</span> <span class='hs-conid'>False</span> <span class='hs-conid'>False</span> <span class='hs-varid'>r1</span> <span class='hs-layout'>(</span><span class='hs-conid'>RIReg</span> <span class='hs-varid'>r2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r1</span>
<a name="line-126"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ST</span> <span class='hs-conid'>FF32</span> <span class='hs-varid'>fReg</span> <span class='hs-layout'>(</span><span class='hs-conid'>AddrRegReg</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>g0</span><span class='hs-layout'>)</span>
<a name="line-127"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ST</span> <span class='hs-conid'>FF32</span> <span class='hs-layout'>(</span><span class='hs-varid'>fRegHi</span> <span class='hs-varid'>fReg</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>AddrRegImm</span> <span class='hs-varid'>r1</span> <span class='hs-layout'>(</span><span class='hs-conid'>ImmInt</span> <span class='hs-num'>4</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-128"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>SUB</span> <span class='hs-conid'>False</span> <span class='hs-conid'>False</span> <span class='hs-varid'>r1</span> <span class='hs-layout'>(</span><span class='hs-conid'>RIReg</span> <span class='hs-varid'>r2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r1</span> <span class='hs-keyglyph'>]</span>
<a name="line-129"></a>
<a name="line-130"></a> <span class='hs-comment'>-- Translate to</span>
<a name="line-131"></a> <span class='hs-comment'>-- ld [addr],%fn</span>
<a name="line-132"></a> <span class='hs-comment'>-- ld [addr+4],%f(n+1)</span>
<a name="line-133"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ST</span> <span class='hs-conid'>FF64</span> <span class='hs-varid'>fReg</span> <span class='hs-varid'>addr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instr</span>
<a name="line-134"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>addr'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addrOffset</span> <span class='hs-varid'>addr</span> <span class='hs-num'>4</span>
<a name="line-135"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>toOL</span> <span class='hs-keyglyph'>[</span> <span class='hs-conid'>ST</span> <span class='hs-conid'>FF32</span> <span class='hs-varid'>fReg</span> <span class='hs-varid'>addr</span>
<a name="line-136"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ST</span> <span class='hs-conid'>FF32</span> <span class='hs-layout'>(</span><span class='hs-varid'>fRegHi</span> <span class='hs-varid'>fReg</span><span class='hs-layout'>)</span> <span class='hs-varid'>addr'</span> <span class='hs-keyglyph'>]</span>
<a name="line-137"></a>
<a name="line-138"></a> <span class='hs-comment'>-- some other instr</span>
<a name="line-139"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span>
<a name="line-140"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unitOL</span> <span class='hs-varid'>instr</span>
<a name="line-141"></a>
<a name="line-142"></a>
<a name="line-143"></a>
<a name="line-144"></a><a name="fRegHi"></a><span class='hs-comment'>-- | The the high partner for this float reg. </span>
<a name="line-145"></a><span class='hs-definition'>fRegHi</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Reg</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Reg</span>
<a name="line-146"></a><span class='hs-definition'>fRegHi</span> <span class='hs-layout'>(</span><span class='hs-conid'>RegReal</span> <span class='hs-layout'>(</span><span class='hs-conid'>RealRegSingle</span> <span class='hs-varid'>r1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-147"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>r1</span> <span class='hs-varop'>>=</span> <span class='hs-num'>32</span>
<a name="line-148"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>r1</span> <span class='hs-varop'><=</span> <span class='hs-num'>63</span>
<a name="line-149"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>r1</span> <span class='hs-varop'>`mod`</span> <span class='hs-num'>2</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span>
<a name="line-150"></a> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>RegReal</span> <span class='hs-varop'>$</span> <span class='hs-conid'>RealRegSingle</span> <span class='hs-layout'>(</span><span class='hs-varid'>r1</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-151"></a>
<a name="line-152"></a><span class='hs-comment'>-- Can't take high partner for non-low reg.</span>
<a name="line-153"></a><span class='hs-definition'>fRegHi</span> <span class='hs-varid'>reg</span>
<a name="line-154"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pprPanic</span> <span class='hs-str'>"SPARC.CodeGen.Expand: can't take fRegHi from "</span> <span class='hs-layout'>(</span><span class='hs-varid'>ppr</span> <span class='hs-varid'>reg</span><span class='hs-layout'>)</span>
<a name="line-155"></a>
<a name="line-156"></a>
<a name="line-157"></a>
<a name="line-158"></a>
<a name="line-159"></a>
<a name="line-160"></a>
<a name="line-161"></a>
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