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Simulated int128 type.

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This commit is contained in:
Russell O'Connor
2022-07-27 11:09:51 -04:00
parent 694ce8fb2d
commit 2914bccbc0
13 changed files with 750 additions and 289 deletions
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9
configure.ac
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@@ -175,7 +175,11 @@ AC_ARG_ENABLE(external_default_callbacks,
[SECP_SET_DEFAULT([enable_external_default_callbacks], [no], [no])])
# Test-only override of the (autodetected by the C code) "widemul" setting.
# Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
# Legal values are:
# * int64 (for [u]int64_t),
# * int128 (for [unsigned] __int128),
# * int128_struct (for int128 implemented as a structure),
# * and auto (the default).
AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto])
AC_ARG_WITH([asm], [AS_HELP_STRING([--with-asm=x86_64|arm|no|auto],
@@ -285,6 +289,9 @@ fi
# Select wide multiplication implementation
case $set_widemul in
int128_struct)
AC_DEFINE(USE_FORCE_WIDEMUL_INT128_STRUCT, 1, [Define this symbol to force the use of the structure for simulating (unsigned) int128 based wide multiplication])
;;
int128)
AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation])
;;