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[Bug gas/32544] New: [2.44 regression] "Unsupported broadcast" assemble


From: sam at gentoo dot org
Subject: [Bug gas/32544] New: [2.44 regression] "Unsupported broadcast" assemble failure for vpsubd
Date: Sat, 11 Jan 2025 03:37:31 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=32544

            Bug ID: 32544
           Summary: [2.44 regression] "Unsupported broadcast" assemble
                    failure for vpsubd
           Product: binutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: sam at gentoo dot org
  Target Milestone: ---

This fails with recent gas:
```
        .file   "a.c"
        .text
        .section        .text.startup,"ax",@progbits
        .p2align 4
        .globl  main
        .type   main, @function
main:
.LFB0:
        .cfi_startproc
#APP
# 2 "/tmp/a.c" 1
        vpsubd -168(%ebp){1to4}, %xmm0, %xmm0
# 0 "" 2
#NO_APP
        xorl    %eax, %eax
        ret
        .cfi_endproc
.LFE0:
        .size   main, .-main
        .ident  "GCC: (Gentoo Hardened 15.0.9999 p, commit
93975113f3b353a27dea263c60ee62b27894be9b) 15.0.0 20250110 (experimental)
9193641d1695293006ed0b818bb4161a1b6fbed2"
        .section        .note.GNU-stack,"",@progbits
```

```
$ /tmp/binutils/bin/as /tmp/a.s -32 -v
GNU assembler version 2.43.50 (x86_64-pc-linux-gnu) using BFD version (GNU
Binutils) 2.43.50.20250111
/tmp/a.c: Assembler messages:
/tmp/a.c:2: Error: unsupported broadcast for `vpsubd'
```

I originally filed it as a GCC bug but it is a gas regression, I think. 2.43
gas works.

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