Improve the comment in the ARM setjmp.S.
Based on code review comments for 460130b7d07f0efba7f4f43f657f0f60daeb71e2.
Bug: N/A
Test: N/A
Change-Id: Ia86bc92dfe3f18261e06af33488a548ea9911b10
diff --git a/libc/arch-arm/bionic/setjmp.S b/libc/arch-arm/bionic/setjmp.S
index 30e7e23..5fbcaf3 100644
--- a/libc/arch-arm/bionic/setjmp.S
+++ b/libc/arch-arm/bionic/setjmp.S
@@ -58,17 +58,15 @@
// 0 sigflag/cookie setjmp cookie in top 31 bits, signal mask flag in low bit
// 1 sigmask 64-bit signal mask (not used with _setjmp / _longjmp)
// 2 " "
-// 3 reserved (unused to allow float_base to be maximally aligned)
+// 3 reserved (unused to allow float_base to be maximally aligned;
+// this avoids software emulation of unaligned loads/stores)
// 4 float_base base of float registers (d8 to d15)
// 20 float_state floating-point status and control register
// 21 core_base base of core registers (r4-r11, r13-r14)
-// 31 checksum checksum of all of the core registers, to give better error messages.
+// 31 checksum checksum of all of the core registers, to give better error messages
// 32 reserved reserved entries (room to grow)
-// 64
-//
-// NOTE: float_base must be at an even word index, since the
-// FP registers will be loaded/stored with instructions
-// that expect 8-byte alignment.
+// ...
+// 63 " "
#define _JB_SIGFLAG 0
#define _JB_SIGMASK (_JB_SIGFLAG + 1)