Author: andrew Date: Tue Jul 16 23:19:05 2013 New Revision: 253400 URL: http://svnweb.freebsd.org/changeset/base/253400
Log: Fix vfp: - We should check is_d32 to see howmany registers we have - In vfp_restore mark vfpscr as an output register Without the second part it appears we can return the incorrect value from vfp_bounce if the VFP condition flags are set as it may override the register holding the return value. Modified: head/sys/arm/arm/vfp.c Modified: head/sys/arm/arm/vfp.c ============================================================================== --- head/sys/arm/arm/vfp.c Tue Jul 16 22:14:26 2013 (r253399) +++ head/sys/arm/arm/vfp.c Tue Jul 16 23:19:05 2013 (r253400) @@ -202,21 +202,20 @@ vfp_restore(struct vfp_state *vfpsave) * form ldcl<c>, and similar for stcleq. */ #ifdef __clang__ -#define ldcleq "ldcleq" -#define stcleq "stcleq" +#define ldclne "ldclne" +#define stclne "stclne" #else -#define ldcleq "ldceql" -#define stcleq "stceql" +#define ldclne "ldcnel" +#define stclne "stcnel" #endif if (vfpsave) { - __asm __volatile("ldc p10, c0, [%0], #128\n" /* d0-d15 */ - "cmp %0, #0\n" /* -D16 or -D32? */ - ldcleq" p11, c0, [%0], #128\n" /* d16-d31 */ - "addne %0, %0, #128\n" /* skip missing regs */ - "ldr %1, [%0]\n" /* set old vfpscr */ - "mcr p10, 7, %1, cr1, c0, 0\n" - :: "r" (vfpsave), "r" (vfpscr), "r" (is_d32) - : "cc"); + __asm __volatile("ldc p10, c0, [%1], #128\n" /* d0-d15 */ + "cmp %2, #0\n" /* -D16 or -D32? */ + ldclne" p11, c0, [%1], #128\n" /* d16-d31 */ + "addeq %1, %1, #128\n" /* skip missing regs */ + "ldr %0, [%1]\n" /* set old vfpscr */ + "mcr p10, 7, %0, cr1, c0, 0\n" + : "=&r" (vfpscr) : "r" (vfpsave), "r" (is_d32) : "cc"); PCPU_SET(vfpcthread, PCPU_GET(curthread)); } } @@ -238,12 +237,12 @@ vfp_store(struct vfp_state *vfpsave) tmp = fmrx(VFPEXC); /* Is the vfp enabled? */ if (vfpsave && tmp & VFPEXC_EN) { __asm __volatile("stc p11, c0, [%1], #128\n" /* d0-d15 */ - "cmp %0, #0\n" /* -D16 or -D32? */ - stcleq" p11, c0, [%1], #128\n" /* d16-d31 */ - "addne %1, %1, #128\n" /* skip missing regs */ + "cmp %2, #0\n" /* -D16 or -D32? */ + stclne" p11, c0, [%1], #128\n" /* d16-d31 */ + "addeq %1, %1, #128\n" /* skip missing regs */ "mrc p10, 7, %0, cr1, c0, 0\n" /* fmxr(VFPSCR) */ "str %0, [%1]\n" /* save vfpscr */ - : "=&r" (vfpscr) : "r" (vfpsave), "r" (is_d32) : "cc"); + : "=&r" (vfpscr) : "r" (vfpsave), "r" (is_d32) : "cc"); } #undef ldcleq #undef stcleq _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"