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authorRich Felker <dalias@aerifal.cx>2012-03-19 05:42:04 -0400
committerRich Felker <dalias@aerifal.cx>2012-03-19 05:42:04 -0400
commit0b70a1e9a9651d21242c5b6da327ecab0f1a38a6 (patch)
tree5a12d948d65d668ebc1aa01a1646c7acd20b251b /src/math/i386/floor.s
parent58ff9e8eaf99f2294232be860daa2ca6f3674faf (diff)
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asm for floor/ceil/trunc
Diffstat (limited to 'src/math/i386/floor.s')
-rw-r--r--src/math/i386/floor.s67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/math/i386/floor.s b/src/math/i386/floor.s
new file mode 100644
index 00000000..46ba88db
--- /dev/null
+++ b/src/math/i386/floor.s
@@ -0,0 +1,67 @@
+.global floorf
+.type floorf,@function
+floorf:
+	flds 4(%esp)
+	jmp 1f
+
+.global floorl
+.type floorl,@function
+floorl:
+	fldt 4(%esp)
+	jmp 1f
+
+.global floor
+.type floor,@function
+floor:
+	fldl 4(%esp)
+1:	mov $0x7,%al
+1:	fstcw 4(%esp)
+	mov 5(%esp),%ah
+	mov %al,5(%esp)
+	fldcw 4(%esp)
+	frndint
+	mov %ah,5(%esp)
+	fldcw 4(%esp)
+	ret
+
+.global ceil
+.type ceil,@function
+ceil:
+	fldl 4(%esp)
+	mov $0xb,%al
+	jmp 1b
+
+.global ceilf
+.type ceilf,@function
+ceilf:
+	flds 4(%esp)
+	mov $0xb,%al
+	jmp 1b
+
+.global ceill
+.type ceill,@function
+ceill:
+	fldt 4(%esp)
+	mov $0xb,%al
+	jmp 1b
+
+.global trunc
+.type trunc,@function
+trunc:
+	fldl 4(%esp)
+	mov $0xf,%al
+	jmp 1b
+
+.global truncf
+.type truncf,@function
+truncf:
+	flds 4(%esp)
+	mov $0xf,%al
+	jmp 1b
+
+.global truncl
+.type truncl,@function
+truncl:
+	fldt 4(%esp)
+	mov $0xf,%al
+	jmp 1b