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authorLudovic Courtès <ludo@gnu.org>2010-10-13 01:31:19 +0200
committerLudovic Courtès <ludo@gnu.org>2010-10-13 01:31:19 +0200
commite78d4bf9a9501654024a18f8d0baa1597d57fcb8 (patch)
treebaac08c8bcab8232ff9babdad2511236ecb12b2f /libguile/vm-i-system.c
parentde6b3a5cb919534773e9bde571bdf500dc604eff (diff)
downloadguile-e78d4bf9a9501654024a18f8d0baa1597d57fcb8.tar.gz
Optimize `1+' and `1-' on fixnums.
* libguile/vm-i-scheme.c (INUM_MAX, INUM_MIN): New macros. (add1, sub1): Add/subtract without untagging the operand. This leads to a 44% run time improvement compared to the previous implementation. * libguile/vm.c: Include <stdint.h>. * test-suite/tests/numbers.test ("1+", "1-"): Add tests for MOST-POSITIVE-FIXNUM, resp. MOST-NEGATIVE-FIXNUM, for 32-bit and 34-bit values thereof. * benchmark-suite/benchmarks/arithmetic.bm: New file. * benchmark-suite/Makefile.am (SCM_BENCHMARKS): Add it.
Diffstat (limited to 'libguile/vm-i-system.c')
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