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powerpc: Fix operand prefixes
The file sysdeps/powerpc/sysdeps.h defines aliases for condition register operands. E.g.: 'cr7' means condition register 7. On the one hand, this increases readability, as it makes it easier for readers to know whether the operand is a condition register, a general purpose register or an immediate. On the other hand, this permits that condition registers be written as if they were general purpose, and vice-versa, thus reducing the readability of the code. This commit removes some of these unintentional misuses. The changes have no effect on the final code. Checked with objdump.
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@ -1,3 +1,9 @@
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2016-05-04 Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
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* sysdeps/powerpc/powerpc64/power8/strncpy.S: Fix use of condition
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registers specifiers where general purpose registers specifiers should
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have been used.
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2016-05-04 Florian Weimer <fweimer@redhat.com>
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[BZ #19779]
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@ -294,7 +294,7 @@ L(pagecross):
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#endif
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orc r9,r7,r9 /* Mask bits that are not part of the
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string. */
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li cr7,0
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li r7,0
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cmpb r9,r9,r7 /* Check for null bytes in DWORD1. */
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cmpdi cr7,r9,0
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bne cr7,L(short_path_prepare_2)
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@ -305,14 +305,14 @@ L(pagecross):
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/* For next checks we have aligned address, so we check for more
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three doublewords to make sure we can read 16 unaligned bytes
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to start the bulk copy with 16 aligned addresses. */
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ld cr7,8(r11)
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ld r7,8(r11)
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cmpb r9,r7,r9
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cmpdi cr7,r9,0
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bne cr7,L(short_path_prepare_2)
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addi cr7,r8,-8
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addi r7,r8,-8
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cmpldi cr7,r7,8
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ble cr7,L(short_path_prepare_2)
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ld cr7,16(r11)
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ld r7,16(r11)
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cmpb r9,r7,r9
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cmpdi cr7,r9,0
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bne cr7,L(short_path_prepare_2)
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