Implementation notes: riscv64, riscvunleashed000, crypto_dh/prjfp128bk

Computer: riscvunleashed000
Architecture: riscv64
CPU ID: unknown CPU ID
SUPERCOP version: 20210326
Operation: crypto_dh
Primitive: prjfp128bk

Compiler output

Implementation: T:v01/varglv4
Security model: timingleaks
Compiler: clang -mcpu=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE
array_lo.c: array_lo.c:37:3: error: invalid output constraint '=&d' in asm
array_lo.c: mim_mul_1(an[al], an, an, al, base, buf[i]);
array_lo.c: ^
array_lo.c: ./multiprecision.h:696:4: note: expanded from macro 'mim_mul_1'
array_lo.c: km_mul_2_add_c(_t, (zn)[0], (an)[0], (b), _t); \
array_lo.c: ^
array_lo.c: ./kernel.h:127:4: note: expanded from macro 'km_mul_2_add_c'
array_lo.c: : "=&d"((zH)), "=a"((zL)) \
array_lo.c: ^
array_lo.c: array_lo.c:37:3: error: invalid output constraint '=&d' in asm
array_lo.c: ./multiprecision.h:699:4: note: expanded from macro 'mim_mul_1'
array_lo.c: km_mul_2_add_c(_t, (zn)[0], (an)[0], (b), _t); \
array_lo.c: ^
array_lo.c: ./kernel.h:127:4: note: expanded from macro 'km_mul_2_add_c'
array_lo.c: : "=&d"((zH)), "=a"((zL)) \
array_lo.c: ^
array_lo.c: array_lo.c:37:3: error: invalid output constraint '=&d' in asm
array_lo.c: ./multiprecision.h:700:4: note: expanded from macro 'mim_mul_1'
array_lo.c: km_mul_2_add_c(_t, (zn)[1], (an)[1], (b), _t); \
array_lo.c: ^
array_lo.c: ./kernel.h:127:4: note: expanded from macro 'km_mul_2_add_c'
array_lo.c: : "=&d"((zH)), "=a"((zL)) \
array_lo.c: ^
array_lo.c: array_lo.c:37:3: error: invalid output constraint '=&d' in asm
array_lo.c: ./multiprecision.h:703:4: note: expanded from macro 'mim_mul_1'
array_lo.c: ...

Number of similar (compiler,implementation) pairs: 13, namely:
CompilerImplementations
clang -mcpu=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE T:v01/varglv4 T:v01/w4s01glv4 T:v01/w4s02glv4 T:v01/w4s04glv4 T:v01/w4s08glv4 T:v01/w4s16glv4 T:v01/w4s32glv4 T:v01/w8s01glv4 T:v01/w8s02glv4 T:v01/w8s04glv4 T:v01/w8s08glv4 T:v01/w8s16glv4 T:v01/w8s32glv4