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Simplify cache recovery

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This commit is contained in:
Junekey Jeon 2022-01-15 04:57:17 -08:00 committed by Victor Zverovich
parent 3dc26b44d3
commit 22b14ff252
1 changed files with 2 additions and 21 deletions
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23
include/fmt/format-inl.h
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@ -1731,15 +1731,6 @@ template <> struct cache_accessor<double> {
0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed,
0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9};
static constexpr const uint32_t pow10_recovery_errors[] = {
0x01450050, 0x01100010, 0x00500400, 0x00000140, 0x05040004, 0x5a6959a0,
0x04956996, 0x51451150, 0x00541551, 0x50551554, 0x04000101, 0x00151014,
0x00415000, 0x40000010, 0x01000000, 0x54565900, 0x05554155, 0x54454140,
0x55515551, 0x55555555, 0x55555455, 0x00555555, 0x41100001, 0x10001445,
0x00000400, 0x05111001, 0x41455440, 0x95555514, 0x01154555, 0x00104100,
0x55244004, 0x55656555, 0x01041502, 0x40540014, 0x41500044, 0x00410540,
0x00000000, 0x40404540, 0x00040001};
static const int compression_ratio = 27;
// Compute base index.
@ -1768,18 +1759,8 @@ template <> struct cache_accessor<double> {
recovered_cache =
uint128_wrapper{(recovered_cache.low() >> alpha) | high_to_middle,
((middle_low.low() >> alpha) | middle_to_low)};
// Get error.
int error_idx = (k - float_info<double>::min_k) / 16;
uint32_t error = (pow10_recovery_errors[error_idx] >>
((k - float_info<double>::min_k) % 16) * 2) &
0x3;
// Add the error back.
FMT_ASSERT(
recovered_cache.low() + 1 >= error && recovered_cache.low() + 1 != 0,
"");
return {recovered_cache.high(), recovered_cache.low() + 1 - error};
FMT_ASSERT(recovered_cache.low() + 1 != 0, "");
return {recovered_cache.high(), recovered_cache.low() + 1};
#endif
}