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-rw-r--r--erts/emulator/beam/erl_bits.c8
-rw-r--r--erts/emulator/test/bs_match_misc_SUITE.erl12
2 files changed, 18 insertions, 2 deletions
diff --git a/erts/emulator/beam/erl_bits.c b/erts/emulator/beam/erl_bits.c
index 3753b618e1..06d53efb5e 100644
--- a/erts/emulator/beam/erl_bits.c
+++ b/erts/emulator/beam/erl_bits.c
@@ -484,8 +484,16 @@ erts_bs_get_float_2(Process *p, Uint num_bits, unsigned flags, ErlBinMatchBuffer
ERTS_FP_ERROR_THOROUGH(p, f32, return THE_NON_VALUE);
f.fd = f32;
} else {
+#ifdef DOUBLE_MIDDLE_ENDIAN
+ FloatDef ftmp;
+ ftmp.fd = f64;
+ f.fw[0] = ftmp.fw[1];
+ f.fw[1] = ftmp.fw[0];
+ ERTS_FP_ERROR_THOROUGH(p, f.fd, return THE_NON_VALUE);
+#else
ERTS_FP_ERROR_THOROUGH(p, f64, return THE_NON_VALUE);
f.fd = f64;
+#endif
}
mb->offset += num_bits;
hp = HeapOnlyAlloc(p, FLOAT_SIZE_OBJECT);
diff --git a/erts/emulator/test/bs_match_misc_SUITE.erl b/erts/emulator/test/bs_match_misc_SUITE.erl
index 15427661f3..b0904acbe9 100644
--- a/erts/emulator/test/bs_match_misc_SUITE.erl
+++ b/erts/emulator/test/bs_match_misc_SUITE.erl
@@ -23,7 +23,8 @@
bound_var/1,bound_tail/1,t_float/1,little_float/1,sean/1,
kenneth/1,encode_binary/1,native/1,happi/1,
size_var/1,wiger/1,x0_context/1,huge_float_field/1,
- writable_binary_matched/1,otp_7198/1,unordered_bindings/1]).
+ writable_binary_matched/1,otp_7198/1,unordered_bindings/1,
+ float_middle_endian/1]).
-include_lib("test_server/include/test_server.hrl").
@@ -33,7 +34,7 @@ all() ->
[bound_var, bound_tail, t_float, little_float, sean,
kenneth, encode_binary, native, happi, size_var, wiger,
x0_context, huge_float_field, writable_binary_matched,
- otp_7198, unordered_bindings].
+ otp_7198, unordered_bindings, float_middle_endian].
groups() ->
[].
@@ -92,6 +93,13 @@ t_float(Config) when is_list(Config) ->
ok.
+float_middle_endian(Config) when is_list(Config) ->
+ F = 9007199254740990.0, % turns to -NaN when word-swapped
+ ?line fcmp(F, match_float(<<F:64/float>>, 64, 0)),
+ ?line fcmp(F, match_float(<<1:1,F:64/float,127:7>>, 64, 1)),
+ ?line fcmp(F, match_float(<<1:13,F:64/float,127:3>>, 64, 13)),
+ ok.
+
fcmp(F1, F2) when (F1 - F2) / F2 < 0.0000001 -> ok.