remove unused byteswap functions.
We need these only for gcc2, which doesn't have builtins. Only swapping floats and doubles remains to implement for all architectures. Change-Id: I60e39ad42d4ef762f3324f934f2996dde1412f1a Reviewed-on: https://review.haiku-os.org/c/1182 Reviewed-by: waddlesplash <[email protected]>
This commit is contained in:
PulkoMandy
@@ -7,73 +7,42 @@
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/* uint16 __swap_int16(uint16 value)
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*/
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FUNCTION(__swap_int16):
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moveq.l #0,%d0
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/* 32-bit aligned stack! */
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move.l (4,%a7),%d1
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move.b %d1,%d0
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lsr.w #8,%d1
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lsl.w #8,%d0
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move.b %d1,%d0
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rts
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FUNCTION_END(__swap_int16)
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/* uint32 __swap_int32(uint32 value)
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*/
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FUNCTION(__swap_int32):
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/* moveq.l #0,%d0*/
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move.b (7,%a7),%d0
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lsl.l #8,%d0
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move.b (6,%a7),%d0
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lsl.l #8,%d0
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move.b (5,%a7),%d0
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lsl.l #8,%d0
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move.b (4,%a7),%d0
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rts
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FUNCTION_END(__swap_int32)
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/* uint64 __swap_int64(uint64 value)
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*/
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FUNCTION(__swap_int64):
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/* moveq.l #0,%d0*/
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move.b (7,%a7),%d1
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lsl.l #8,%d1
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move.b (6,%a7),%d1
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lsl.l #8,%d1
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move.b (5,%a7),%d1
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lsl.l #8,%d1
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move.b (4,%a7),%d1
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/**/
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move.b (11,%a7),%d0
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lsl.l #8,%d0
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move.b (10,%a7),%d0
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lsl.l #8,%d0
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move.b (9,%a7),%d0
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lsl.l #8,%d0
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move.b (8,%a7),%d0
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rts
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FUNCTION_END(__swap_int64)
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/* TODO: The following functions can surely be optimized. A simple optimization
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* would be to define macros with the contents of the __swap_int{32,64}
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* functions and use those instead of calling the functions.
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*/
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/* float __swap_float(float value)
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/* float __swap_float(float value)
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*/
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*/
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FUNCTION(__swap_float):
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FUNCTION(__swap_float):
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jmp __swap_int32
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/* moveq.l #0,%d0*/
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//rts
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move.b (7,%a7),%d0
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lsl.l #8,%d0
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move.b (6,%a7),%d0
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lsl.l #8,%d0
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move.b (5,%a7),%d0
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lsl.l #8,%d0
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move.b (4,%a7),%d0
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rts
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FUNCTION_END(__swap_float)
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FUNCTION_END(__swap_float)
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/* double __swap_double(double value)
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/* double __swap_double(double value)
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*/
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*/
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FUNCTION(__swap_double):
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FUNCTION(__swap_double):
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jmp __swap_int32
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/* moveq.l #0,%d0*/
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//rts
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move.b (7,%a7),%d1
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lsl.l #8,%d1
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move.b (6,%a7),%d1
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lsl.l #8,%d1
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move.b (5,%a7),%d1
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lsl.l #8,%d1
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move.b (4,%a7),%d1
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/**/
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move.b (11,%a7),%d0
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lsl.l #8,%d0
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move.b (10,%a7),%d0
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lsl.l #8,%d0
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move.b (9,%a7),%d0
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lsl.l #8,%d0
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move.b (8,%a7),%d0
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rts
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#warning M68K: XXX:check sizeof(double)
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#warning M68K: XXX:check sizeof(double)
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FUNCTION_END(__swap_double)
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FUNCTION_END(__swap_double)
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@@ -7,46 +7,6 @@
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.text
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.text
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/* uint16 __swap_int16(uint16 value)
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* r3
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*/
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FUNCTION(__swap_int16):
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rlwinm %r4, %r3, 8, 16, 23 // byte 4 -> byte 3 (clear other bits)
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rlwimi %r4, %r3, 24, 24, 31 // byte 3 -> byte 4 (copy into)
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mr %r3, %r4 // copy to result register
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blr
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/* uint32 __swap_int32(uint32 value)
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* r3
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*/
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FUNCTION(__swap_int32):
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rlwinm %r4, %r3, 24, 0, 31 // byte 4 to 1, byte 2 to 3
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rlwimi %r4, %r3, 8, 8, 15 // byte 3 to 2
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rlwimi %r4, %r3, 8, 24, 31 // byte 1 to 4
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mr %r3, %r4
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blr
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/* uint64 __swap_int64(uint64 value)
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* r3/r4
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*/
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FUNCTION(__swap_int64):
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rlwinm %r5, %r3, 24, 0, 31 // byte 4 to 5, byte 2 to 7
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rlwimi %r5, %r3, 8, 8, 15 // byte 3 to 6
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rlwimi %r5, %r3, 8, 24, 31 // byte 1 to 8
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rlwinm %r3, %r4, 24, 0, 31 // byte 8 to 1, byte 6 to 3
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rlwimi %r3, %r4, 8, 8, 15 // byte 7 to 2
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rlwimi %r3, %r4, 8, 24, 31 // byte 5 to 4
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mr %r4, %r5 // copy lower 32 bits
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blr
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/* TODO: The following functions can surely be optimized. A simple optimization
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* would be to define macros with the contents of the __swap_int{32,64}
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* functions and use those instead of calling the functions.
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*/
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/* float __swap_float(float value)
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/* float __swap_float(float value)
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* f1
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* f1
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*/
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*/
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@@ -7,28 +7,6 @@
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#include <asm_defs.h>
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#include <asm_defs.h>
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/* uint16 __swap_int16(uint16 value) */
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FUNCTION(__swap_int16):
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movl %edi, %eax
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bswap %eax
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shr $16, %eax
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ret
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FUNCTION_END(__swap_int16)
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/* uint32 __swap_int32(uint32 value) */
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FUNCTION(__swap_int32):
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movl %edi, %eax
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bswap %eax
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ret
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FUNCTION_END(__swap_int32)
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/* uint64 __swap_int64(uint64 value) */
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FUNCTION(__swap_int64):
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movq %rdi, %rax
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bswap %rax
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ret
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FUNCTION_END(__swap_int64)
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/* float __swap_float(float value) */
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/* float __swap_float(float value) */
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FUNCTION(__swap_float):
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FUNCTION(__swap_float):
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sub $8, %rsp
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sub $8, %rsp
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