summaryrefslogtreecommitdiffstats
path: root/arch/arm/include/asm/vfpmacros.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/include/asm/vfpmacros.h')
-rw-r--r--arch/arm/include/asm/vfpmacros.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/include/asm/vfpmacros.h b/arch/arm/include/asm/vfpmacros.h
new file mode 100644
index 0000000..422f3cc
--- /dev/null
+++ b/arch/arm/include/asm/vfpmacros.h
@@ -0,0 +1,47 @@
+/*
+ * arch/arm/include/asm/vfpmacros.h
+ *
+ * Assembler-only file containing VFP macros and register definitions.
+ */
+#include "vfp.h"
+
+@ Macros to allow building with old toolkits (with no VFP support)
+ .macro VFPFMRX, rd, sysreg, cond
+ MRC\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMRX \rd, \sysreg
+ .endm
+
+ .macro VFPFMXR, sysreg, rd, cond
+ MCR\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMXR \sysreg, \rd
+ .endm
+
+ @ read all the working registers back into the VFP
+ .macro VFPFLDMIA, base, tmp
+#if __LINUX_ARM_ARCH__ < 6
+ LDC p11, cr0, [\base],#33*4 @ FLDMIAX \base!, {d0-d15}
+#else
+ LDC p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d0-d15}
+#endif
+#ifdef CONFIG_VFPv3
+ VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
+ and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field
+ cmp \tmp, #2 @ 32 x 64bit registers?
+ ldceql p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d16-d31}
+ addne \base, \base, #32*4 @ step over unused register space
+#endif
+ .endm
+
+ @ write all the working registers out of the VFP
+ .macro VFPFSTMIA, base, tmp
+#if __LINUX_ARM_ARCH__ < 6
+ STC p11, cr0, [\base],#33*4 @ FSTMIAX \base!, {d0-d15}
+#else
+ STC p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d0-d15}
+#endif
+#ifdef CONFIG_VFPv3
+ VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
+ and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field
+ cmp \tmp, #2 @ 32 x 64bit registers?
+ stceql p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d16-d31}
+ addne \base, \base, #32*4 @ step over unused register space
+#endif
+ .endm
OpenPOWER on IntegriCloud