diff options
Diffstat (limited to 'yjit_asm.c')
| -rw-r--r-- | yjit_asm.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/yjit_asm.c b/yjit_asm.c index 3a43c80ef0..64cbb163a2 100644 --- a/yjit_asm.c +++ b/yjit_asm.c @@ -1343,7 +1343,10 @@ void mov(codeblock_t *cb, x86opnd_t dst, x86opnd_t src) else cb_write_rm(cb, dst.num_bits == 16, dst.num_bits == 64, NO_OPND, dst, 0, 1, 0xC7); - cb_write_int(cb, src.as.imm, (dst.num_bits > 32)? 32:dst.num_bits); + const uint32_t output_num_bits = (dst.num_bits > 32u) ? 32u : dst.num_bits; + // assert that we can write whole immediate without loss of infomation + assert (sig_imm_size(src.as.imm) <= output_num_bits); + cb_write_int(cb, src.as.imm, output_num_bits); } else |