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Untag values and indexes for all bytevector instructions

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* libguile/vm-engine.c (bv-s8-ref, bv-s16-ref, bv-s32-ref, bv-s64-ref):
  Unbox index and return unboxed S32 value.
  (bv-s8-set!, bv-s16-set!, bv-s32-set!, bv-s64-set!): Unbox index and
  take unboxed S32 value.
  (bv-u8-ref, bv-u16-ref, bv-u32-ref, bv-u64-ref)
  (bv-s8-set!, bv-s16-set!, bv-s32-set!, bv-s64-set!): Likewise, but
  with unsigned values.
  (bv-f32-ref, bv-f32-set!, bv-f64-ref, bv-f64-set!): Use memcpy to
  access the value so we don't have to think about alignment.  GCC will
  inline this to a single instruction on architectures that support
  unaligned access.
* libguile/vm.c (vm_error_out_of_range_uint64)
  (vm_error_out_of_range_int64): New helpers.

* module/language/cps/slot-allocation.scm (compute-var-representations):
  All bytevector ref operations produce untagged values.

* module/language/cps/types.scm (define-bytevector-accessors): Update
  for bytevector untagged indices and values.

* module/language/cps/utils.scm (compute-constant-values): Fix s64
  case.

* module/language/tree-il/compile-cps.scm (convert): Box results of all
  bytevector accesses, and unbox incoming indices and values.
This commit is contained in:
Andy Wingo 2015-11-21 11:50:15 +01:00
parent 8bf77f7192
commit a08b3d40f8
11 changed files with 151 additions and 235 deletions
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2
libguile/instructions.c
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@ -54,6 +54,8 @@ SCM_SYMBOL (sym_bang, "!");
M(BF32) /* Immediate double, low bits. */ \
M(AU32) /* Immediate uint64, high bits. */ \
M(BU32) /* Immediate uint64, low bits. */ \
M(AS32) /* Immediate int64, high bits. */ \
M(BS32) /* Immediate int64, low bits. */ \
M(N32) /* Non-immediate. */ \
M(R32) /* Scheme value (indirected). */ \
M(L32) /* Label. */ \