Changeset e80329d6 in mainline for uspace/lib/c/arch/amd64/src/fibril.S

Timestamp:

2010-11-02T20:02:07Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b5e68c8, e06ef614

Parents:

c75698b

Message:

Use shorter 32-bit instructions where possible.

File:

• uspace/lib/c/arch/amd64/src/fibril.S (modified) (2 diffs)

uspace/lib/c/arch/amd64/src/fibril.S

@@ -49 +49 @@
         movq %rax, OFFSET_TLS(%rdi)
                 
-        xorq %rax,%rax          # context_save returns 1
-        incq %rax
+        xorl %eax, %eax         # context_save returns 1
+        incl %eax
         ret
 
@@ -67 +67 @@
         # Set thread local storage
         movq OFFSET_TLS(%rdi), %rdi   # Set arg1 to TLS addr
-        movq $1, %rax           # SYS_TLS_SET
+        movl $1, %eax           # SYS_TLS_SET
         syscall
 
-        xorq %rax,%rax          # context_restore returns 0
+        xorl %eax, %eax         # context_restore returns 0
         ret