[LLVMdev] Reference Manual Clarifications
Gordon Henriksen
gordonhenriksen at mac.com
Mon Mar 31 14:36:16 PDT 2008
Hi Jon,
Please you'll want to submit patches as unified diffs and as
attachments.
I notice you're using Thunderbird, so I refer you to this tip:
http://lists.cs.uiuc.edu/pipermail/llvmdev/2008-January/011992.html
Although this note doesn't apply to how you included your original
patch (looks like you pasted it in), Thunderbird has default
attachment handling settings which cause problems for many of our
reviewers.
Thanks,
Gordon
On Mar 31, 2008, at 15:17, Jon Sargeant wrote:
> Here is a patch containing all but one of the changes. I realized
> that
> the remainder/modulo discussion does indeed belongs to the srem
> instruction. The semantics of urem are obvious and need no further
> clarification.
>
> Best Regards,
> Jon
>
> 1572,1573c1572,1575
> < notation (see below). Floating point constants must have a <a
> < href="#t_floating">floating point</a> type. </dd>
> ---
>> notation (see below). The assembler requires the exact decimal
> value of
>> a floating-point constant. For example, the assembler accepts
>> 1.25 but
>> rejects 1.3 because 1.3 is a repeating decimal in binary. Floating
> point
>> constants must have a <a href="#t_floating">floating point</a>
> type. </dd>
> 2178c2180
> < program. They require two operands, execute an operation on them,
> and
> ---
>> program. They require two operands of the same type, execute an
> operation on them, and
> 2181,2182c2183
> < The result value of a binary operator is not
> < necessarily the same type as its operands.</p>
> ---
>> The result value has the same type as its operands.</p>
> 2332c2333
> < <p>The value produced is the signed integer quotient of the two
> operands.</p>
> ---
>> <p>The value produced is the signed integer quotient of the two
> operands rounded towards zero.</p>
> 2386,2387c2387
> < This instruction always performs an unsigned division to get the
> remainder,
> < regardless of whether the arguments are unsigned or not.</p>
> ---
>> This instruction always performs an unsigned division to get the
> remainder.</p>
> 2458c2458,2459
> < <p>This instruction returns the <i>remainder</i> of a division.</p>
> ---
>> <p>This instruction returns the <i>remainder</i> of a division.
>> The remainder has the same sign as the dividend.</p>
> 2472,2474c2473,2474
> < instructions. They require two operands, execute an operation on
> them,
> < and produce a single value. The resulting value of the bitwise
> binary
> < operators is always the same type as its first operand.</p>
> ---
>> instructions. They require two operands of the same type, execute an
> operation on them,
>> and produce a single value. The resulting value is the same type as
> its operands.</p>
> 2499,2501c2499,2501
> < <p>The value produced is <tt>var1</tt> * 2<sup><tt>var2</tt></
> sup>. If
> < <tt>var2</tt> is (statically or dynamically) equal to or larger than
> the number
> < of bits in <tt>var1</tt>, the result is undefined.</p>
> ---
>> <p>The value produced is <tt>var1</tt> * 2<sup><tt>var2</tt></sup>
> mod 2<sup>n</sup>,
>> where n is the width of the result. If <tt>var2</tt> is (statically
> or dynamically) negative or
>> equal to or larger than the number of bits in <tt>var1</tt>, the
> result is undefined.</p>
> 2532c2532
> < shift. If <tt>var2</tt> is (statically or dynamically) equal to or
> larger than
> ---
>> shift. If <tt>var2</tt> is (statically or dynamically) negative or
> equal to or larger than
> 2567c2567
> < of <tt>var1</tt>. If <tt>var2</tt> is (statically or dynamically)
> equal to or
> ---
>> of <tt>var1</tt>. If <tt>var2</tt> is (statically or dynamically)
> negative or equal to or
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