Changeset 8e7c9fe in mainline for uspace/lib/math/arch/ia32/src/sin.S

Timestamp:

2014-09-12T03:45:25Z (10 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

c53b58e

Parents:

3eb0c85 (diff), 105d8d6 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

merge mainline changes

most usb changes were reverted. blink and usbmass were fixed
known problems:
ehci won't initialize
usbmast asserts on unmount (happens on mainline too)

File:

• uspace/lib/math/arch/ia32/src/sin.S (moved) (moved from uspace/lib/c/arch/mips64/src/stacktrace_asm.S ) (2 diffs)

uspace/lib/math/arch/ia32/src/sin.S

@@ -1 +1 @@
 #
-# Copyright (c) 2009 Jakub Jermar
+# Copyright (c) 2014 Martin Decky
 # All rights reserved.
 #
@@ -27 +27 @@
 #
 
+#include <libarch/x87.h>
+
 .text
 
-.set noat
-.set noreorder
+.global sin
 
-.global stacktrace_prepare
-.global stacktrace_fp_get
-.global stacktrace_pc_get
-
-stacktrace_prepare:
-stacktrace_fp_get:
-stacktrace_pc_get:
-        j $ra
-        xor $v0, $v0
+sin:
+        # compute sine (no stack frame)
+        
+        fldl 4(%esp)
+        fsin
+        
+        # detect if source operand is out of range
+        
+        fnstsw %ax
+        andw $X87_STATUS_WORD_C2_MASK, %ax
+        jnz fix_range
+        
+                ret
+        
+        # argument reduction
+        
+        fix_range:
+                fldpi
+                fadd %st(0)
+                fxch %st(1)
+        
+        reduce:
+                fprem1
+                fnstsw %ax
+                andw $X87_STATUS_WORD_C2_MASK, %ax
+                jnz reduce
+        
+        fstpl %st(1)
+        fsin
+        
+        ret