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Diffstat (limited to 'src/settings.js')
| -rw-r--r-- | src/settings.js | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/settings.js b/src/settings.js index da39cbee..2d645a12 100644 --- a/src/settings.js +++ b/src/settings.js @@ -57,6 +57,14 @@ var I64_MODE = 1; // How to implement 64-bit integers: // use doubles for addition etc., like mode 0. This mode is slower than // mode 0, so its only benefit is proper support for 64 bit bitops. // TODO: Full bignum support +var DOUBLE_MODE = 1; // How to load and store 64-bit doubles. Without typed arrays or in typed array mode 1, + // this doesn't matter - these values are just values like any other. In typed array mode 2, + // a potentialy risk is that doubles may be only 32-bit aligned. Forcing 64-bit alignment + // in Clang itself should be able to solve that, or as a workaround in DOUBLE_MODE 1 we + // will carefully load in parts, in a way that requires only 32-bit alignment. In DOUBLE_MODE + // 0 we will simply store and load doubles as 32-bit floats, so when they are stored/loaded + // they will truncate from 64 to 32 bits, and lose precision. This is faster, and might + // work for some code (but probably that code should just use floats and not doubles anyhow). var EMULATE_UNALIGNED_ACCESSES = 1; // If set, the compiler will 'emulate' loads and stores that are not known to // be sufficiently aligned, by working on individual bytes. This can be // important in USE_TYPED_ARRAYS == 2, where unaligned accesses do not work, |