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Remove UNSAFE flag. (#134)

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This flag was for SunOS 3 and 4 on sun3 hardware (68k).

It enabled some unsafe optimizations via assembler. This hasn't
actually been built since the DOS port (since the header for this
was renamed, but the code in `xc.c` wasn't updated).

The optimizations here made assumptions that were specific to the
68k hardware and register allocation. They aren't likely to be
of much use moving forward, and we've got plenty of safe performance
improvements from the last 30 years of hardware advances.
This commit is contained in:
Bruce Mitchener
2020-12-27 03:53:47 +07:00
committed by GitHub
parent e295a34484
commit 0880b2f3dd
13 changed files with 9 additions and 227 deletions
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2
bin/compile-flags
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@@ -27,7 +27,6 @@ sparc True if we're compiling on a SPARC machine.
mc68020 True if we're compiling on a Motorola 680x0 machine.
sun3 We're compiling for a Sun-3.
UNSAFE If true, enables the "fast" version of 68020 opcodes.
NOASM If true, suppress any attempt to include assembler
versions of things in the emulator. In 'lispemul.c',
if this is true, disables:
@@ -36,7 +35,6 @@ NOASM If true, suppress any attempt to include assembler
SUN4_OS4_IL
OPDISP
NATIVETRAN
UNSAFE
PROFILE
and enables NOASMFNCALL
C_ONLY