MIPS: Correct FP ISA requirements

Correct ISA requirements for floating-point instructions:

* the CU3 exception signifies a real COP3 instruction in MIPS I & II,

* the BC1FL and BC1TL instructions are not supported in MIPS I,

* the SQRT.fmt instructions are indeed supported in MIPS II,

* the LDC1 and SDC1 instructions are indeed supported in MIPS32r1,

* the CEIL.W.fmt, FLOOR.W.fmt, ROUND.W.fmt and TRUNC.W.fmt instructions
  are indeed supported in MIPS32,

* the CVT.L.fmt and CVT.fmt.L instructions are indeed supported in
  MIPS32r2 and MIPS32r6,

* the CEIL.L.fmt, FLOOR.L.fmt, ROUND.L.fmt and TRUNC.L.fmt instructions
  are indeed supported in MIPS32r2 and MIPS32r6,

* the RSQRT.fmt and RECIP.fmt instructions are indeed supported in
  MIPS64r1,

Also simplify conditionals for MIPS III and MIPS IV FPU instructions and
the handling of the MOVCI minor opcode.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9700/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h
index 62a4730de86a..fc2ad332541c 100644
--- a/arch/mips/include/asm/cpu-features.h
+++ b/arch/mips/include/asm/cpu-features.h
@@ -221,8 +221,11 @@
 #define cpu_has_mips_4_5_r      (cpu_has_mips_4 | cpu_has_mips_5_r)
 #define cpu_has_mips_5_r        (cpu_has_mips_5 | cpu_has_mips_r)
 
-#define cpu_has_mips_4_5_r2_r6  (cpu_has_mips_4_5 | cpu_has_mips_r2 | \
-                                 cpu_has_mips_r6)
+#define cpu_has_mips_3_4_5_64_r2_r6                                     \
+                                (cpu_has_mips_3 | cpu_has_mips_4_5_64_r2_r6)
+#define cpu_has_mips_4_5_64_r2_r6                                       \
+                                (cpu_has_mips_4_5 | cpu_has_mips64r1 |  \
+                                 cpu_has_mips_r2 | cpu_has_mips_r6)
 
 #define cpu_has_mips32  (cpu_has_mips32r1 | cpu_has_mips32r2 | cpu_has_mips32r6)
 #define cpu_has_mips64  (cpu_has_mips64r1 | cpu_has_mips64r2 | cpu_has_mips64r6)