Raymond Toy pushed to branch issue-356-x87-status-word-in-low-part at cmucl / cmucl

Commits:

• 4949a011
  by Raymond Toy at 2024-09-09T12:07:55-07:00

  Address review comments
  
  Add comment to say we're doing this to match the SSE2 mxcsr register
  so the sticky bits are in the same place.
  

1 changed file:

• src/compiler/x86/float-sse2.lisp

Changes:

    (inst xor sw-reg #x3f)		; invert exception mask

    (move res sw-reg)

    ;; Put status word in the low 16 bits and the control word in the

-   ;; high 16 bits.

+   ;; high 16 bits.  This is to match the SSE2 mxcsr register that has

+   ;; the status bits (sticky bits) in lowest part of the word.

    (inst rol res 16)))

 ;; Set the control and status words from the FPU.  The low 16 bits