diff options
| author | des <des@FreeBSD.org> | 2004-03-16 20:42:02 +0000 |
|---|---|---|
| committer | des <des@FreeBSD.org> | 2004-03-16 20:42:02 +0000 |
| commit | ce346529a392bdc70b527967b64de371a411c397 (patch) | |
| tree | 6f573f40ecc689ac27427614841b8f02fedfd30e /lib/libc/sparc64 | |
| parent | ffa157ec1e6e53fb7cdd4737c35288e138bb357d (diff) | |
| download | FreeBSD-src-ce346529a392bdc70b527967b64de371a411c397.zip FreeBSD-src-ce346529a392bdc70b527967b64de371a411c397.tar.gz | |
Use unions to avoid violating C99 strict aliasing rules.
Diffstat (limited to 'lib/libc/sparc64')
| -rw-r--r-- | lib/libc/sparc64/fpu/fpu_qp.c | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/lib/libc/sparc64/fpu/fpu_qp.c b/lib/libc/sparc64/fpu/fpu_qp.c index 88df045..9e3bedc 100644 --- a/lib/libc/sparc64/fpu/fpu_qp.c +++ b/lib/libc/sparc64/fpu/fpu_qp.c @@ -57,10 +57,9 @@ void \ _Qp_ ## qname ## toq(u_int *c, ntype n) \ { \ struct fpemu fe; \ - atype *a; \ + union { atype a[2]; ntype n; } u = { .n = n }; \ __asm __volatile("stx %%fsr, %0" : "=m" (fe.fe_fsr) :); \ - a = (atype *)&n; \ - fe.fe_f1.fp_sign = a[0] >> 31; \ + fe.fe_f1.fp_sign = u.a[0] >> 31; \ fe.fe_f1.fp_sticky = 0; \ fe.fe_f1.fp_class = __fpu_ ## fname ## tof(&fe.fe_f1, __VA_ARGS__); \ c[0] = __fpu_ftoq(&fe, &fe.fe_f1, c); \ @@ -72,15 +71,13 @@ type \ _Qp_qto ## qname(u_int *c) \ { \ struct fpemu fe; \ - u_int *a; \ - type n; \ + union { u_int a; type n; } u; \ __asm __volatile("stx %%fsr, %0" : "=m" (fe.fe_fsr) :); \ - a = (u_int *)&n; \ fe.fe_f1.fp_sign = c[0] >> 31; \ fe.fe_f1.fp_sticky = 0; \ fe.fe_f1.fp_class = __fpu_qtof(&fe.fe_f1, c[0], c[1], c[2], c[3]); \ - a[0] = __fpu_fto ## fname(&fe, &fe.fe_f1, ## __VA_ARGS__); \ - return (n); \ + u.a = __fpu_fto ## fname(&fe, &fe.fe_f1, ## __VA_ARGS__); \ + return (u.n); \ } #define FCC_EQ(fcc) ((fcc) == FSR_CC_EQ) @@ -126,19 +123,19 @@ _QP_OP(div) _QP_OP(mul) _QP_OP(sub) -_QP_TTOQ(d, d, double, u_int, a[0], a[1]) -_QP_TTOQ(i, i, int, u_int, a[0]) -_QP_TTOQ(s, s, float, u_int, a[0]) -_QP_TTOQ(x, x, long, u_long, a[0]) -_QP_TTOQ(ui, i, u_int, u_int, a[0]) -_QP_TTOQ(ux, x, u_long, u_long, a[0]) +_QP_TTOQ(d, d, double, u_int, u.a[0], u.a[1]) +_QP_TTOQ(i, i, int, u_int, u.a[0]) +_QP_TTOQ(s, s, float, u_int, u.a[0]) +_QP_TTOQ(x, x, long, u_long, u.a[0]) +_QP_TTOQ(ui, i, u_int, u_int, u.a[0]) +_QP_TTOQ(ux, x, u_long, u_long, u.a[0]) -_QP_QTOT(d, d, double, a) +_QP_QTOT(d, d, double, &u.a) _QP_QTOT(i, i, int) _QP_QTOT(s, s, float) -_QP_QTOT(x, x, long, a) +_QP_QTOT(x, x, long, &u.a) _QP_QTOT(ui, i, u_int) -_QP_QTOT(ux, x, u_long, a) +_QP_QTOT(ux, x, u_long, &u.a) _QP_CMP(eq, 0, FCC_EQ) _QP_CMP(ge, 0, FCC_GE) |
