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Avoid costly 64-bit division in grub_get_time_ms on most platforms.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-03-10 17:45:38 +01:00
parent fc3ff2a2ad
commit 5341c0fbfc
10 changed files with 70 additions and 93 deletions
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6
grub-core/kern/i386/pc/init.c
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@ -52,8 +52,8 @@ void (*grub_pc_net_config) (char **device, char **path);
* return the real time in ticks, of which there are about
* 18-20 per second
*/
grub_uint32_t
grub_get_rtc (void)
grub_uint64_t
grub_rtc_get_time_ms (void)
{
struct grub_bios_int_registers regs;
@ -61,7 +61,7 @@ grub_get_rtc (void)
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x1a, &regs);
return (regs.ecx << 16) | (regs.edx & 0xffff);
return ((regs.ecx << 16) | (regs.edx & 0xffff)) * 55ULL;
}
void