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Fix arm64 offset mask warnings

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This commit is contained in:
Benjamin Oldenburg 2026-03-16 00:13:31 +07:00
parent e661cb9a62
commit 98194f55ba
1 changed files with 17 additions and 9 deletions
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26
arm64-gen.c
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@ -312,14 +312,15 @@ static void arm64_spoff(int reg, uint64_t off)
static uint64_t arm64_check_offset(int invert, int sz_, uint64_t off)
{
uint32_t sz = sz_;
if (!(off & ~((uint32_t)0xfff << sz)) ||
uint64_t scaled_mask = (uint64_t)0xfff << sz;
if (!(off & ~scaled_mask) ||
(off < 256 || -off <= 256))
return invert ? off : 0ul;
else if ((off & ((uint32_t)0xfff << sz)))
return invert ? off & ((uint32_t)0xfff << sz)
: off & ~((uint32_t)0xfff << sz);
else if (off & scaled_mask)
return invert ? off & scaled_mask : off & ~scaled_mask;
else if (off & 0x1ff)
return invert ? off & 0x1ff : off & ~0x1ff;
return invert ? off & 0x1ff : off & ~(uint64_t)0x1ff;
else
return invert ? 0ul : off;
}
@ -327,9 +328,10 @@ static uint64_t arm64_check_offset(int invert, int sz_, uint64_t off)
static void arm64_ldrx(int sg, int sz_, int dst, int bas, uint64_t off)
{
uint32_t sz = sz_;
uint64_t scaled_mask = (uint64_t)0xfff << sz;
if (sz >= 2)
sg = 0;
if (!(off & ~((uint32_t)0xfff << sz)))
if (!(off & ~scaled_mask))
o(0x39400000 | dst | bas << 5 | off << (10 - sz) |
(uint32_t)!!sg << 23 | sz << 30); // ldr(*) x(dst),[x(bas),#(off)]
else if (off < 256 || -off <= 256)
@ -345,7 +347,9 @@ static void arm64_ldrx(int sg, int sz_, int dst, int bas, uint64_t off)
static void arm64_ldrv(int sz_, int dst, int bas, uint64_t off)
{
uint32_t sz = sz_;
if (!(off & ~((uint32_t)0xfff << sz)))
uint64_t scaled_mask = (uint64_t)0xfff << sz;
if (!(off & ~scaled_mask))
o(0x3d400000 | dst | bas << 5 | off << (10 - sz) |
(sz & 4) << 21 | (sz & 3) << 30); // ldr (s|d|q)(dst),[x(bas),#(off)]
else if (off < 256 || -off <= 256)
@ -442,7 +446,9 @@ static void arm64_ldrs(int reg_, int size)
static void arm64_strx(int sz_, int dst, int bas, uint64_t off)
{
uint32_t sz = sz_;
if (!(off & ~((uint32_t)0xfff << sz)))
uint64_t scaled_mask = (uint64_t)0xfff << sz;
if (!(off & ~scaled_mask))
o(0x39000000 | dst | bas << 5 | off << (10 - sz) | sz << 30);
// str(*) x(dst),[x(bas],#(off)]
else if (off < 256 || -off <= 256)
@ -458,7 +464,9 @@ static void arm64_strx(int sz_, int dst, int bas, uint64_t off)
static void arm64_strv(int sz_, int dst, int bas, uint64_t off)
{
uint32_t sz = sz_;
if (!(off & ~((uint32_t)0xfff << sz)))
uint64_t scaled_mask = (uint64_t)0xfff << sz;
if (!(off & ~scaled_mask))
o(0x3d000000 | dst | bas << 5 | off << (10 - sz) |
(sz & 4) << 21 | (sz & 3) << 30); // str (s|d|q)(dst),[x(bas),#(off)]
else if (off < 256 || -off <= 256)