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PowerPC floating point little-endian [13 of 15]

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http://sourceware.org/ml/libc-alpha/2013-08/msg00088.html

	* sysdeps/powerpc/powerpc32/fpu/s_roundf.S: Increase alignment of
	constants to usual value for .cst8 section, and remove redundant
	high address load.
	* sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S: Use float
	constant for 0x1p52.  Load little-endian words of double from
	correct stack offsets.
This commit is contained in:
Alan Modra 2013-08-17 18:32:18 +09:30
parent 7b88401f3b
commit 6a31fe7f9c
3 changed files with 19 additions and 13 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2013-10-04 Alan Modra <amodra@gmail.com>
* sysdeps/powerpc/powerpc32/fpu/s_roundf.S: Increase alignment of
constants to usual value for .cst8 section, and remove redundant
high address load.
* sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S: Use float
constant for 0x1p52. Load little-endian words of double from
correct stack offsets.
2013-10-04 Alan Modra <amodra@gmail.com>
* sysdeps/powerpc/sysdep.h (LOWORD, HIWORD, HISHORT): Define.

3
sysdeps/powerpc/powerpc32/fpu/s_roundf.S
View File

@ -19,7 +19,7 @@
#include <sysdep.h>
.section .rodata.cst8,"aM",@progbits,8
.align 2
.align 3
.LC0: /* 2**23 */
.long 0x4b000000
.LC1: /* 0.5 */
@ -60,7 +60,6 @@ ENTRY (__roundf )
#ifdef SHARED
lfs fp10,.LC1-.LC0(r9)
#else
lis r9,.LC1@ha
lfs fp10,.LC1@l(r9)
#endif
ble- cr6,.L4

20
sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S
View File

@ -19,12 +19,10 @@
#include <sysdep.h>
#include <math_ldbl_opt.h>
.section .rodata.cst12,"aM",@progbits,12
.section .rodata.cst8,"aM",@progbits,8
.align 3
.LC0: /* 0x1.0000000000000p+52 == 2^52 */
.long 0x43300000
.long 0x00000000
.long 0x3f000000 /* Use this for 0.5 */
.LC0: .long (52+127)<<23 /* 0x1p+52 */
.long (-1+127)<<23 /* 0.5 */
.section ".text"
@ -57,12 +55,12 @@ ENTRY (__llround)
addi r9,r9,.LC0-got_label@l
mtlr r11
cfi_same_value (lr)
lfd fp9,0(r9)
lfs fp10,8(r9)
lfs fp9,0(r9)
lfs fp10,4(r9)
#else
lis r9,.LC0@ha
lfd fp9,.LC0@l(r9) /* Load 2^52 into fpr9. */
lfs fp10,.LC0@l+8(r9) /* Load 0.5 into fpr10. */
lfs fp9,.LC0@l(r9) /* Load 2^52 into fpr9. */
lfs fp10,.LC0@l+4(r9) /* Load 0.5 into fpr10. */
#endif
fabs fp2,fp1 /* Get the absolute value of x. */
fsub fp12,fp10,fp10 /* Compute 0.0 into fpr12. */
@ -80,8 +78,8 @@ ENTRY (__llround)
nop
nop
nop
lwz r4,12(r1) /* Load return as integer. */
lwz r3,8(r1)
lwz r3,8+HIWORD(r1) /* Load return as integer. */
lwz r4,8+LOWORD(r1)
.Lout:
addi r1,r1,16
blr