lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-10-21 14:53:53 +03:00
Code Activity

Use movq for 64-bit operations

Browse Source 
The EXTRACT_WORDS64 and INSERT_WORDS64 macros use movd for a 64-bit
operation.  Somehow gcc manages to turn this into movq, but LLVM won't.

2013-05-15  Peter Collingbourne  <pcc@google.com>

	* sysdeps/x86_64/fpu/math_private.h (MOVQ): New macro.
	(EXTRACT_WORDS64) Use where appropriate.
	(INSERT_WORDS64) Likewise.
This commit is contained in:
Peter Collingbourne
2013-05-15 20:33:45 +02:00
committed by Andreas Jaeger
parent 791f3ba0db
commit 1deff3dca1
2 changed files with 8 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
ChangeLog
View File

@@ -1,5 +1,9 @@
2013-05-15 Peter Collingbourne <pcc@google.com>
* sysdeps/x86_64/fpu/math_private.h (MOVQ): New macro.
(EXTRACT_WORDS64) Use where appropriate.
(INSERT_WORDS64) Likewise.
* sysdeps/x86_64/fpu/multiarch/s_fma.c (__fma_fma4): Replace xm
constraints with x constraints.
* sysdeps/x86_64/fpu/multiarch/s_fmaf.c (__fmaf_fma4): Likewise.

6
sysdeps/x86_64/fpu/math_private.h
View File

@@ -5,15 +5,17 @@
#if defined __AVX__ || defined SSE2AVX
# define MOVD "vmovd"
# define MOVQ "vmovq"
#else
# define MOVD "movd"
# define MOVQ "movq"
#endif
/* Direct movement of float into integer register. */
#define EXTRACT_WORDS64(i, d) \
do { \
int64_t i_; \
asm (MOVD " %1, %0" : "=rm" (i_) : "x" ((double) (d))); \
asm (MOVQ " %1, %0" : "=rm" (i_) : "x" ((double) (d))); \
(i) = i_; \
} while (0)
@@ -22,7 +24,7 @@
do { \
int64_t i_ = i; \
double d__; \
asm (MOVD " %1, %0" : "=x" (d__) : "rm" (i_)); \
asm (MOVQ " %1, %0" : "=x" (d__) : "rm" (i_)); \
d = d__; \
} while (0)