[Bug gas/5109] New: Extra REX byte generated in Intel mode

[hjl at lucon dot org]

address@hidden simd]$ cat x.s
        .intel_syntax noprefix
 comisd xmm1,QWORD PTR [rip+0x12345678]        
 cvtdq2pd xmm1,QWORD PTR [rip+0x12345678]        
 cvtps2pd xmm1,QWORD PTR [rip+0x12345678]        
 movhpd QWORD PTR [rip+0x12345678],xmm1        
 movhpd xmm1,QWORD PTR [rip+0x12345678]        
 movhps QWORD PTR [rip+0x12345678],xmm1        
 movhps xmm1,QWORD PTR [rip+0x12345678]        
 movlpd QWORD PTR [rip+0x12345678],xmm1        
 movlpd xmm1,QWORD PTR [rip+0x12345678]        
 movlps QWORD PTR [rip+0x12345678],xmm1        
 movlps xmm1,QWORD PTR [rip+0x12345678]        
 ucomisd xmm1,QWORD PTR [rip+0x12345678]        
 cmpeqsd xmm0,QWORD PTR [rax]
 cvtpi2pd xmm0,QWORD PTR [rax]
 cvtpi2ps xmm0,QWORD PTR [rax]
 cvtps2pi mm0,QWORD PTR [rax]
 cvtsd2ss xmm0,QWORD PTR [rax]
 divsd  xmm0,QWORD PTR [rax]
 maxsd  xmm0,QWORD PTR [rax]
 movntsd QWORD PTR [rax],xmm0
 movsd  xmm0,QWORD PTR [rax]
 movsd  QWORD PTR [rax],xmm0
 mulsd  xmm0,QWORD PTR [rax]
 sqrtsd xmm0,QWORD PTR [rax]
 subsd  xmm0,QWORD PTR [rax]
address@hidden simd]$ gcc -c x.s
address@hidden simd]$ objdump -dw x.o | sed -e "s/[ \t]*#.*$//"

x.o:     file format elf64-x86-64

Disassembly of section .text:

0000000000000000 <.text>:
   0:   66 48 0f 2f 0d 78 56 34 12      rex.W comisd 0x12345678(%rip),%xmm1
   9:   f3 48 0f e6 0d 78 56 34 12      rex.W cvtdq2pd 0x12345678(%rip),%xmm1
  12:   48 0f 5a 0d 78 56 34 12         rex.W cvtps2pd 0x12345678(%rip),%xmm1
  1a:   66 48 0f 17 0d 78 56 34 12      rex.W movhpd %xmm1,0x12345678(%rip)
  23:   66 48 0f 16 0d 78 56 34 12      rex.W movhpd 0x12345678(%rip),%xmm1
  2c:   48 0f 17 0d 78 56 34 12         rex.W movhps %xmm1,0x12345678(%rip)
  34:   48 0f 16 0d 78 56 34 12         rex.W movhps 0x12345678(%rip),%xmm1
  3c:   66 48 0f 13 0d 78 56 34 12      rex.W movlpd %xmm1,0x12345678(%rip)
  45:   66 48 0f 12 0d 78 56 34 12      rex.W movlpd 0x12345678(%rip),%xmm1
  4e:   48 0f 13 0d 78 56 34 12         rex.W movlps %xmm1,0x12345678(%rip)
  56:   48 0f 12 0d 78 56 34 12         rex.W movlps 0x12345678(%rip),%xmm1
  5e:   66 48 0f 2e 0d 78 56 34 12      rex.W ucomisd 0x12345678(%rip),%xmm1
  67:   f2 48 0f c2 00 00       rex.W cmpeqsd (%rax),%xmm0
  6d:   66 48 0f 2a 00          rex.W cvtpi2pd (%rax),%xmm0
  72:   48 0f 2a 00             rex.W cvtpi2ps (%rax),%xmm0
  76:   48 0f 2d 00             rex.W cvtps2pi (%rax),%mm0
  7a:   f2 48 0f 5a 00          rex.W cvtsd2ss (%rax),%xmm0
  7f:   f2 48 0f 5e 00          rex.W divsd  (%rax),%xmm0
  84:   f2 48 0f 5f 00          rex.W maxsd  (%rax),%xmm0
  89:   f2 48 0f 2b 00          rex.W movntsd %xmm0,(%rax)
  8e:   f2 48 0f 10 00          rex.W movsd  (%rax),%xmm0
  93:   f2 48 0f 11 00          rex.W movsd  %xmm0,(%rax)
  98:   f2 48 0f 59 00          rex.W mulsd  (%rax),%xmm0
  9d:   f2 48 0f 51 00          rex.W sqrtsd (%rax),%xmm0
  a2:   f2 48 0f 5c 00          rex.W subsd  (%rax),%xmm0
address@hidden simd]$

-- 
           Summary: Extra REX byte generated in Intel mode
           Product: binutils
           Version: 2.19 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gas
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: hjl at lucon dot org
                CC: bug-binutils at gnu dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=5109

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