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120 lines
3.4 KiB
120 lines
3.4 KiB
# commit 603e84104cdc709c8e7dcbac54b9a585bf8dff78 |
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# Author: Alan Modra <amodra@gmail.com> |
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# Date: Sat Aug 17 18:29:43 2013 +0930 |
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# |
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# PowerPC floating point little-endian [9 of 15] |
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# http://sourceware.org/ml/libc-alpha/2013-07/msg00200.html |
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# |
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# This works around the fact that vsx is disabled in current |
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# little-endian gcc. Also, float constants take 4 bytes in memory |
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# vs. 16 bytes for vector constants, and we don't need to write one lot |
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# of masks for double (register format) and another for float (mem |
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# format). |
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# |
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# * sysdeps/powerpc/fpu/s_float_bitwise.h (__float_and_test28): Don't |
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# use vector int constants. |
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# (__float_and_test24, __float_and8, __float_get_exp): Likewise. |
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# |
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/fpu/s_float_bitwise.h glibc-2.17-c758a686/sysdeps/powerpc/fpu/s_float_bitwise.h |
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--- glibc-2.17-c758a686/sysdeps/powerpc/fpu/s_float_bitwise.h 2014-05-27 22:37:18.000000000 -0500 |
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+++ glibc-2.17-c758a686/sysdeps/powerpc/fpu/s_float_bitwise.h 2014-05-27 22:37:20.000000000 -0500 |
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@@ -23,18 +23,19 @@ |
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#include <math_private.h> |
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/* Returns (int)(num & 0x7FFFFFF0 == value) */ |
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-static inline |
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-int __float_and_test28 (float num, float value) |
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+static inline int |
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+__float_and_test28 (float num, float value) |
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{ |
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float ret; |
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#ifdef _ARCH_PWR7 |
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- vector int mask = (vector int) { |
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- 0x7ffffffe, 0x00000000, 0x00000000, 0x0000000 |
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- }; |
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+ union { |
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+ int i; |
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+ float f; |
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+ } mask = { .i = 0x7ffffff0 }; |
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__asm__ ( |
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- /* the 'f' constrain is use on mask because we just need |
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+ /* the 'f' constraint is used on mask because we just need |
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* to compare floats, not full vector */ |
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- "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask) |
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+ "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f) |
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); |
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#else |
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int32_t inum; |
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@@ -46,16 +47,17 @@ |
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} |
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/* Returns (int)(num & 0x7FFFFF00 == value) */ |
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-static inline |
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-int __float_and_test24 (float num, float value) |
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+static inline int |
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+__float_and_test24 (float num, float value) |
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{ |
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float ret; |
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#ifdef _ARCH_PWR7 |
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- vector int mask = (vector int) { |
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- 0x7fffffe0, 0x00000000, 0x00000000, 0x0000000 |
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- }; |
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+ union { |
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+ int i; |
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+ float f; |
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+ } mask = { .i = 0x7fffff00 }; |
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__asm__ ( |
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- "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask) |
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+ "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f) |
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); |
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#else |
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int32_t inum; |
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@@ -67,16 +69,17 @@ |
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} |
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/* Returns (float)(num & 0x7F800000) */ |
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-static inline |
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-float __float_and8 (float num) |
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+static inline float |
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+__float_and8 (float num) |
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{ |
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float ret; |
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#ifdef _ARCH_PWR7 |
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- vector int mask = (vector int) { |
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- 0x7ff00000, 0x00000000, 0x00000000, 0x00000000 |
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- }; |
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+ union { |
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+ int i; |
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+ float f; |
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+ } mask = { .i = 0x7f800000 }; |
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__asm__ ( |
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- "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask) |
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+ "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f) |
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); |
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#else |
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int32_t inum; |
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@@ -88,17 +91,18 @@ |
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} |
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/* Returns ((int32_t)(num & 0x7F800000) >> 23) */ |
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-static inline |
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-int32_t __float_get_exp (float num) |
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+static inline int32_t |
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+__float_get_exp (float num) |
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{ |
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int32_t inum; |
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#ifdef _ARCH_PWR7 |
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float ret; |
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- vector int mask = (vector int) { |
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- 0x7ff00000, 0x00000000, 0x00000000, 0x00000000 |
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- }; |
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+ union { |
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+ int i; |
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+ float f; |
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+ } mask = { .i = 0x7f800000 }; |
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__asm__ ( |
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- "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask) |
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+ "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f) |
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); |
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GET_FLOAT_WORD(inum, ret); |
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#else
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