From 7330548cc5b5ebdbe5c8fa515f1eb2eebfc7f2c3 Mon Sep 17 00:00:00 2001 From: Chiranmoy Bhattacharya Date: Thu, 4 Sep 2025 15:33:47 +0530 Subject: [PATCH v6 2/3] SVE support for hex coding --- config/c-compiler.m4 | 85 +++++++++ configure | 104 +++++++++++ configure.ac | 9 + meson.build | 81 +++++++++ src/backend/utils/adt/encode_aarch64.c | 231 ++++++++++++++++++++++++- src/include/pg_config.h.in | 3 + src/include/utils/builtins.h | 10 +- 7 files changed, 520 insertions(+), 3 deletions(-) diff --git a/config/c-compiler.m4 b/config/c-compiler.m4 index da40bd6a647..73d12826698 100644 --- a/config/c-compiler.m4 +++ b/config/c-compiler.m4 @@ -798,3 +798,88 @@ if test x"$Ac_cachevar" = x"yes"; then fi undefine([Ac_cachevar])dnl ])# PGAC_SVE_POPCNT_INTRINSICS + +# PGAC_ARM_SVE_HEX_INTRINSICS +# ------------------------------ +# Check if the compiler supports the SVE intrinsic required for hex coding: +# svsub_x, svcmplt, svsel, svcmpgt, svtbl, svlsr_x, svand_z, svcreate2, +# svptest_any, svnot_z, svorr_z, svcntb, svld1, svwhilelt_b8, svst2, svld2, +# svget2, svst1 and svlsl_x. +# +# If the intrinsics are supported, sets pgac_arm_sve_hex_intrinsics. +AC_DEFUN([PGAC_ARM_SVE_HEX_INTRINSICS], +[define([Ac_cachevar], [AS_TR_SH([pgac_cv_arm_sve_hex_intrinsics])])dnl +AC_CACHE_CHECK([for svtbl, svlsr_x, svand_z, svcreate2, etc], [Ac_cachevar], +[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include + + char input@<:@64@:>@; + char output@<:@128@:>@; + + #if defined(__has_attribute) && __has_attribute (target) + __attribute__((target("arch=armv8-a+sve"))) + #endif + int get_hex_sve(svbool_t pred, svuint8_t vec, svuint8_t *res) + { + svuint8_t digit = svsub_x(pred, vec, 48), + upper = svsub_x(pred, vec, 55), + lower = svsub_x(pred, vec, 87); + svbool_t valid_digit = svcmplt(pred, digit, 10), + valid_upper = svcmplt(pred, upper, 16); + svuint8_t letter = svsel(valid_upper, upper, lower); + svbool_t valid_letter = svand_z(pred, svcmpgt(pred, letter, 9), + svcmplt(pred, letter, 16)); + if (svptest_any(pred, svnot_z(pred, svorr_z(pred, valid_digit, valid_letter)))) + return 0; + *res = svsel(valid_digit, digit, letter); + return 1; + } + + #if defined(__has_attribute) && __has_attribute (target) + __attribute__((target("arch=armv8-a+sve"))) + #endif + static int hex_coding_test(void) + { + int len = 64, vec_len = svcntb(), vec_len_x2 = svcntb() * 2; + const char *hextbl = "0123456789abcdef"; + svuint8_t hextbl_vec = svld1(svwhilelt_b8(0, 16), (uint8_t *) hextbl); + char *src = input, *dst = output; + + /* hex encode */ + for (uint64_t i = 0; i < 64; i += vec_len, dst += 2 * vec_len, src += vec_len) + { + svbool_t pred = svwhilelt_b8((uint64_t) i, (uint64_t) len); + svuint8_t bytes = svld1(pred, (uint8_t *) src), + high = svlsr_x(pred, bytes, 4), + low = svand_z(pred, bytes, 0xF); + svuint8x2_t merged = svcreate2(svtbl(hextbl_vec, high), svtbl(hextbl_vec, low)); + svst2(pred, (uint8_t *) dst, merged); + } + + /* hex decode */ + len = 128; + + for (int i; i < len; i += vec_len_x2) + { + svbool_t pred = svwhilelt_b8((uint64_t) i / 2, (uint64_t) len / 2); + svuint8x2_t bytes = svld2(pred, (uint8_t *) src + i); + svuint8_t high = svget2(bytes, 0), low = svget2(bytes, 1); + + if (svptest_any(pred, svorr_z(pred, svcmplt(pred, high, '0'), svcmplt(pred, low, '0')))) + break; + if (!get_hex_sve(pred, high, &high) || !get_hex_sve(pred, low, &low)) + break; + + svst1(pred, (uint8_t *) dst + i / 2, svorr_z(pred, svlsl_x(pred, high, 4), low)); + } + + /* return computed value, to prevent the above being optimized away */ + return output@<:@0@:>@; + }], + [return hex_coding_test();])], + [Ac_cachevar=yes], + [Ac_cachevar=no])]) +if test x"$Ac_cachevar" = x"yes"; then + pgac_arm_sve_hex_intrinsics=yes +fi +undefine([Ac_cachevar])dnl +])# PGAC_ARM_SVE_HEX_INTRINSICS diff --git a/configure b/configure index 39c68161cec..60354107f87 100755 --- a/configure +++ b/configure @@ -17735,6 +17735,110 @@ $as_echo "#define USE_SVE_POPCNT_WITH_RUNTIME_CHECK 1" >>confdefs.h fi fi +# Check for ARM SVE intrinsics for hex coding +# +if test x"$host_cpu" = x"aarch64"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for svtbl, svlsr_x, svand_z, svcreate2, etc" >&5 +$as_echo_n "checking for svtbl, svlsr_x, svand_z, svcreate2, etc... " >&6; } +if ${pgac_cv_arm_sve_hex_intrinsics+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include + + char input[64]; + char output[128]; + + #if defined(__has_attribute) && __has_attribute (target) + __attribute__((target("arch=armv8-a+sve"))) + #endif + int get_hex_sve(svbool_t pred, svuint8_t vec, svuint8_t *res) + { + svuint8_t digit = svsub_x(pred, vec, 48), + upper = svsub_x(pred, vec, 55), + lower = svsub_x(pred, vec, 87); + svbool_t valid_digit = svcmplt(pred, digit, 10), + valid_upper = svcmplt(pred, upper, 16); + svuint8_t letter = svsel(valid_upper, upper, lower); + svbool_t valid_letter = svand_z(pred, svcmpgt(pred, letter, 9), + svcmplt(pred, letter, 16)); + if (svptest_any(pred, svnot_z(pred, svorr_z(pred, valid_digit, valid_letter)))) + return 0; + *res = svsel(valid_digit, digit, letter); + return 1; + } + + #if defined(__has_attribute) && __has_attribute (target) + __attribute__((target("arch=armv8-a+sve"))) + #endif + static int hex_coding_test(void) + { + int len = 64, vec_len = svcntb(), vec_len_x2 = svcntb() * 2; + const char *hextbl = "0123456789abcdef"; + svuint8_t hextbl_vec = svld1(svwhilelt_b8(0, 16), (uint8_t *) hextbl); + char *src = input, *dst = output; + + /* hex encode */ + for (uint64_t i = 0; i < 64; i += vec_len, dst += 2 * vec_len, src += vec_len) + { + svbool_t pred = svwhilelt_b8((uint64_t) i, (uint64_t) len); + svuint8_t bytes = svld1(pred, (uint8_t *) src), + high = svlsr_x(pred, bytes, 4), + low = svand_z(pred, bytes, 0xF); + svuint8x2_t merged = svcreate2(svtbl(hextbl_vec, high), svtbl(hextbl_vec, low)); + svst2(pred, (uint8_t *) dst, merged); + } + + /* hex decode */ + len = 128; + + for (int i; i < len; i += vec_len_x2) + { + svbool_t pred = svwhilelt_b8((uint64_t) i / 2, (uint64_t) len / 2); + svuint8x2_t bytes = svld2(pred, (uint8_t *) src + i); + svuint8_t high = svget2(bytes, 0), low = svget2(bytes, 1); + + if (svptest_any(pred, svorr_z(pred, svcmplt(pred, high, '0'), svcmplt(pred, low, '0')))) + break; + if (!get_hex_sve(pred, high, &high) || !get_hex_sve(pred, low, &low)) + break; + + svst1(pred, (uint8_t *) dst + i / 2, svorr_z(pred, svlsl_x(pred, high, 4), low)); + } + + /* return computed value, to prevent the above being optimized away */ + return output[0]; + } +int +main () +{ +return hex_coding_test(); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + pgac_cv_arm_sve_hex_intrinsics=yes +else + pgac_cv_arm_sve_hex_intrinsics=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_arm_sve_hex_intrinsics" >&5 +$as_echo "$pgac_cv_arm_sve_hex_intrinsics" >&6; } +if test x"$pgac_cv_arm_sve_hex_intrinsics" = x"yes"; then + pgac_arm_sve_hex_intrinsics=yes +fi + + if test x"$pgac_arm_sve_hex_intrinsics" = x"yes"; then + +$as_echo "#define USE_SVE_HEX_WITH_RUNTIME_CHECK 1" >>confdefs.h + + fi +fi + # Check for Intel SSE 4.2 intrinsics to do CRC calculations. # { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _mm_crc32_u8 and _mm_crc32_u32" >&5 diff --git a/configure.ac b/configure.ac index 066e3976c0a..6ca57b8c4a7 100644 --- a/configure.ac +++ b/configure.ac @@ -2136,6 +2136,15 @@ if test x"$host_cpu" = x"aarch64"; then fi fi +# Check for ARM SVE intrinsics for hex coding +# +if test x"$host_cpu" = x"aarch64"; then + PGAC_ARM_SVE_HEX_INTRINSICS() + if test x"$pgac_arm_sve_hex_intrinsics" = x"yes"; then + AC_DEFINE(USE_SVE_HEX_WITH_RUNTIME_CHECK, 1, [Define to 1 to use ARM SVE intrinsic for hex coding.]) + fi +fi + # Check for Intel SSE 4.2 intrinsics to do CRC calculations. # PGAC_SSE42_CRC32_INTRINSICS() diff --git a/meson.build b/meson.build index ab8101d67b2..ea5392cfc78 100644 --- a/meson.build +++ b/meson.build @@ -2372,6 +2372,87 @@ int main(void) endif +############################################################### +# Check the availability of SVE intrinsics for hex coding. +############################################################### + +if host_cpu == 'aarch64' + + prog = ''' +#include + +char input[64]; +char output[128]; + +#if defined(__has_attribute) && __has_attribute (target) + __attribute__((target("arch=armv8-a+sve"))) +#endif +int get_hex_sve(svbool_t pred, svuint8_t vec, svuint8_t *res) +{ + svuint8_t digit = svsub_x(pred, vec, 48), + upper = svsub_x(pred, vec, 55), + lower = svsub_x(pred, vec, 87); + svbool_t valid_digit = svcmplt(pred, digit, 10), + valid_upper = svcmplt(pred, upper, 16); + svuint8_t letter = svsel(valid_upper, upper, lower); + svbool_t valid_letter = svand_z(pred, svcmpgt(pred, letter, 9), + svcmplt(pred, letter, 16)); + if (svptest_any(pred, svnot_z(pred, svorr_z(pred, valid_digit, valid_letter)))) + return 0; + *res = svsel(valid_digit, digit, letter); + return 1; +} + +#if defined(__has_attribute) && __has_attribute (target) + __attribute__((target("arch=armv8-a+sve"))) +#endif +int main(void) +{ + int len = 64, vec_len = svcntb(), vec_len_x2 = svcntb() * 2; + const char hextbl[] = "0123456789abcdef"; + svuint8_t hextbl_vec = svld1(svwhilelt_b8(0, 16), (uint8_t *) hextbl); + char *src = input, *dst = output; + + /* hex encode */ + for (uint64_t i = 0; i < 64; i += vec_len, dst += 2 * vec_len, src += vec_len) + { + svbool_t pred = svwhilelt_b8((uint64_t) i, (uint64_t) len); + svuint8_t bytes = svld1(pred, (uint8_t *) src), + high = svlsr_x(pred, bytes, 4), + low = svand_z(pred, bytes, 0xF); + svuint8x2_t merged = svcreate2(svtbl(hextbl_vec, high), svtbl(hextbl_vec, low)); + svst2(pred, (uint8_t *) dst, merged); + } + + /* hex decode */ + len = 128; + + for (int i; i < len; i += vec_len_x2) + { + svbool_t pred = svwhilelt_b8((uint64_t) i / 2, (uint64_t) len / 2); + svuint8x2_t bytes = svld2(pred, (uint8_t *) src + i); + svuint8_t high = svget2(bytes, 0), low = svget2(bytes, 1); + + if (svptest_any(pred, svorr_z(pred, svcmplt(pred, high, '0'), svcmplt(pred, low, '0')))) + break; + if (!get_hex_sve(pred, high, &high) || !get_hex_sve(pred, low, &low)) + break; + + svst1(pred, (uint8_t *) dst + i / 2, svorr_z(pred, svlsl_x(pred, high, 4), low)); + } + + /* return computed value, to prevent the above being optimized away */ + return output[0]; +} +''' + + if cc.links(prog, name: 'SVE hex coding', args: test_c_args) + cdata.set('USE_SVE_HEX_WITH_RUNTIME_CHECK', 1) + endif + +endif + + ############################################################### # Select CRC-32C implementation. # diff --git a/src/backend/utils/adt/encode_aarch64.c b/src/backend/utils/adt/encode_aarch64.c index 7b0412dc255..4f22fb1d6c7 100644 --- a/src/backend/utils/adt/encode_aarch64.c +++ b/src/backend/utils/adt/encode_aarch64.c @@ -20,8 +20,229 @@ #include +#ifdef USE_SVE_HEX_WITH_RUNTIME_CHECK +#include + +#if defined(HAVE_ELF_AUX_INFO) || defined(HAVE_GETAUXVAL) +#include +#endif + +/* + * These are the NEON implementations of the hex encode/decode functions. + */ +static uint64 hex_encode_neon(const char *src, size_t len, char *dst); +static uint64 hex_decode_neon(const char *src, size_t len, char *dst); +static uint64 hex_decode_safe_neon(const char *src, size_t len, char *dst, Node *escontext); + +/* + * These are the SVE implementations of the hex encode/decode functions. + */ +static uint64 hex_encode_sve(const char *src, size_t len, char *dst); +static uint64 hex_decode_sve(const char *src, size_t len, char *dst); +static uint64 hex_decode_safe_sve(const char *src, size_t len, char *dst, Node *escontext); + +/* + * The function pointers are initially set to "choose" functions. These + * functions will first set the pointers to the right implementations (based on + * what the current CPU supports) and then will call the pointer to fulfill the + * caller's request. + */ + +static uint64 hex_encode_choose(const char *src, size_t len, char *dst); +static uint64 hex_decode_choose(const char *src, size_t len, char *dst); +static uint64 hex_decode_safe_choose(const char *src, size_t len, char *dst, Node *escontext); +uint64 (*hex_encode_optimized) (const char *src, size_t len, char *dst) = hex_encode_choose; +uint64 (*hex_decode_optimized) (const char *src, size_t len, char *dst) = hex_decode_choose; +uint64 (*hex_decode_safe_optimized) (const char *src, size_t len, char *dst, Node *escontext) = hex_decode_safe_choose; + +static inline bool +check_sve_support(void) +{ +#ifdef HAVE_ELF_AUX_INFO + unsigned long value; + + return elf_aux_info(AT_HWCAP, &value, sizeof(value)) == 0 && + (value & HWCAP_SVE) != 0; +#elif defined(HAVE_GETAUXVAL) + return (getauxval(AT_HWCAP) & HWCAP_SVE) != 0; +#else + return false; +#endif +} + +static inline void +choose_hex_functions(void) +{ + if (check_sve_support()) + { + hex_encode_optimized = hex_encode_sve; + hex_decode_optimized = hex_decode_sve; + hex_decode_safe_optimized = hex_decode_safe_sve; + } + else + { + hex_encode_optimized = hex_encode_neon; + hex_decode_optimized = hex_decode_neon; + hex_decode_safe_optimized = hex_decode_safe_neon; + } +} + +static uint64 +hex_encode_choose(const char *src, size_t len, char *dst) +{ + choose_hex_functions(); + return hex_encode_optimized(src, len, dst); +} + +static uint64 +hex_decode_choose(const char *src, size_t len, char *dst) +{ + choose_hex_functions(); + return hex_decode_optimized(src, len, dst); +} + +static uint64 +hex_decode_safe_choose(const char *src, size_t len, char *dst, Node *escontext) +{ + choose_hex_functions(); + return hex_decode_safe_optimized(src, len, dst, escontext); +} + +pg_attribute_target("arch=armv8-a+sve") +uint64 +hex_encode_sve(const char *src, size_t len, char *dst) +{ + const char hextbl[] = "0123456789abcdef"; + uint32 vec_len = svcntb(); + svuint8_t hextbl_vec = svld1(svwhilelt_b8(0, 16), (uint8 *) hextbl); + svbool_t pred_true = svptrue_b8(); + size_t chunks_len = len & ~(2 * vec_len - 1); /* process 2 * vec_len bytes per iteration */ + + for (size_t i = 0; i < chunks_len; i += 2 * vec_len) + { + svuint8_t bytes = svld1(pred_true, (uint8 *) src); + svuint8_t high = svlsr_x(pred_true, bytes, 4); + svuint8_t low = svand_z(pred_true, bytes, 0xF); + svuint8x2_t zipped = svcreate2(svtbl(hextbl_vec, high), svtbl(hextbl_vec, low)); + svst2(pred_true, (uint8 *) dst, zipped); + + dst += 2 * vec_len; + src += vec_len; + + /* unrolled */ + bytes = svld1(pred_true, (uint8 *) src); + high = svlsr_x(pred_true, bytes, 4); + low = svand_z(pred_true, bytes, 0xF); + zipped = svcreate2(svtbl(hextbl_vec, high), svtbl(hextbl_vec, low)); + svst2(pred_true, (uint8 *) dst, zipped); + + dst += 2 * vec_len; + src += vec_len; + } + + /* process remaining tail bytes */ + for (size_t i = chunks_len; i < len; i += vec_len) + { + svbool_t pred = svwhilelt_b8((uint64) i, (uint64) len); + svuint8_t bytes = svld1(pred, (uint8 *) src); + svuint8_t high = svlsr_x(pred, bytes, 4); + svuint8_t low = svand_z(pred, bytes, 0xF); + svuint8x2_t zipped = svcreate2(svtbl(hextbl_vec, high), svtbl(hextbl_vec, low)); + svst2(pred, (uint8 *) dst, zipped); + + dst += 2 * vec_len; + src += vec_len; + } + + return (uint64) len * 2; +} + +pg_attribute_target("arch=armv8-a+sve") +static inline bool +get_hex_sve(svbool_t pred, svuint8_t vec, svuint8_t *res) +{ + svuint8_t digit = svsub_x(pred, vec, 48); + svuint8_t upper = svsub_x(pred, vec, 55); + svuint8_t lower = svsub_x(pred, vec, 87); + + svbool_t valid_digit = svcmplt(pred, digit, 10); + svbool_t valid_upper = svcmplt(pred, upper, 16); + + svuint8_t letter = svsel(valid_upper, upper, lower); + svbool_t valid_letter = svand_z(pred, svcmpgt(pred, letter, 9), + svcmplt(pred, letter, 16)); + + if (svptest_any(pred, svnot_z(pred, svorr_z(pred, valid_digit, valid_letter)))) + return false; + + *res = svsel(valid_digit, digit, letter); + return true; +} + +uint64 +hex_decode_sve(const char *src, size_t len, char *dst) +{ + return hex_decode_safe_sve(src, len, dst, NULL); +} + +pg_attribute_target("arch=armv8-a+sve") +uint64 +hex_decode_safe_sve(const char *src, size_t len, char *dst, Node *escontext) +{ + uint32 vec_len = svcntb(); + size_t i = 0; + size_t chunks_len = len & ~(2 * vec_len - 1); /* process 2 * vec_len byte chunk each iteration */ + svbool_t pred = svptrue_b8(); + const char *p = dst; + bool fallback = false; + + while (i < chunks_len) + { + svuint8x2_t bytes = svld2(pred, (uint8 *) src); + svuint8_t high = svget2(bytes, 0); + svuint8_t low = svget2(bytes, 1); + + if (svptest_any(pred, svorr_z(pred, svcmplt(pred, high, '0'), svcmplt(pred, low, '0')))) + { + fallback = true; + break; + } + + if (!get_hex_sve(pred, high, &high) || !get_hex_sve(pred, low, &low)) + { + fallback = true; + break; + } + + svst1(pred, (uint8 *) dst, svorr_z(pred, svlsl_x(pred, high, 4), low)); + + i += 2 * vec_len; + src += 2 * vec_len; + dst += vec_len; + } + + if (len > i && !fallback) /* can use neon for smaller chunks */ + return dst - p + hex_decode_safe_neon(src, len - i, dst, escontext); + + if (fallback) /* fallback */ + return dst - p + hex_decode_safe_scalar(src, len - i, dst, escontext); + + return dst - p; +} + +#endif /* USE_SVE_HEX_WITH_RUNTIME_CHECK */ + +/* + * If the compiler supports SVE, rename the NEON versions because the + * optimized versions are now referenced via function pointers. + */ + uint64 +#ifdef USE_SVE_HEX_WITH_RUNTIME_CHECK +static hex_encode_neon(const char *src, size_t len, char *dst) +#else hex_encode_optimized(const char *src, size_t len, char *dst) +#endif { const char hextbl[] = "0123456789abcdef"; uint8x16_t hextbl_vec = vld1q_u8((uint8 *) hextbl); @@ -63,8 +284,6 @@ hex_encode_optimized(const char *src, size_t len, char *dst) dst += 2 * vec_len; } - - if (len > chunks_len) hex_encode_scalar(src, len - chunks_len, dst); @@ -148,13 +367,21 @@ get_hex_neon(uint8x16_t vec, uint8x16_t *res) } uint64 +#ifdef USE_SVE_HEX_WITH_RUNTIME_CHECK +static hex_decode_neon(const char *src, size_t len, char *dst) +#else hex_decode_optimized(const char *src, size_t len, char *dst) +#endif { return hex_decode_safe_optimized(src, len, dst, NULL); } uint64 +#ifdef USE_SVE_HEX_WITH_RUNTIME_CHECK +static hex_decode_safe_neon(const char *src, size_t len, char *dst, Node *escontext) +#else hex_decode_safe_optimized(const char *src, size_t len, char *dst, Node *escontext) +#endif { uint32 vec_len = sizeof(uint8x16_t); size_t i = 0; diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in index c4dc5d72bdb..a6735bdd21f 100644 --- a/src/include/pg_config.h.in +++ b/src/include/pg_config.h.in @@ -678,6 +678,9 @@ /* Define to 1 to use AVX-512 popcount instructions with a runtime check. */ #undef USE_AVX512_POPCNT_WITH_RUNTIME_CHECK +/* Define to 1 to use SVE instructions for hex coding with a runtime check. */ +#undef USE_SVE_HEX_WITH_RUNTIME_CHECK + /* Define to 1 to build with Bonjour support. (--with-bonjour) */ #undef USE_BONJOUR diff --git a/src/include/utils/builtins.h b/src/include/utils/builtins.h index a809fad2771..8a80a9ae51f 100644 --- a/src/include/utils/builtins.h +++ b/src/include/utils/builtins.h @@ -49,7 +49,15 @@ extern uint64 hex_decode_safe_scalar(const char *src, size_t len, char *dst, #define HEX_CODING_AARCH64 1 #endif -#ifdef HEX_CODING_AARCH64 +/* + * We can try to use an SVE-optimized hex encode/decode on systems supporting SVE. + * For that, we use a function pointer. + */ +#ifdef USE_SVE_HEX_WITH_RUNTIME_CHECK +extern PGDLLIMPORT uint64 (*hex_encode_optimized) (const char *src, size_t len, char *dst); +extern PGDLLIMPORT uint64 (*hex_decode_optimized) (const char *src, size_t len, char *dst); +extern PGDLLIMPORT uint64 (*hex_decode_safe_optimized) (const char *src, size_t len, char *dst, Node *escontext); +#elif HEX_CODING_AARCH64 extern uint64 hex_encode_optimized(const char *src, size_t len, char *dst); extern uint64 hex_decode_optimized(const char *src, size_t len, char *dst); extern uint64 hex_decode_safe_optimized(const char *src, size_t len, char *dst, Node *escontext); -- 2.34.1