Backport from mainline

[pf3gnuchains/gcc-fork.git] / gcc / config / i386 / constraints.md

diff --git a/gcc/config/i386/constraints.md b/gcc/config/i386/constraints.md
index 5a19307..25327dd 100644 (file)
--- a/gcc/config/i386/constraints.md
+++ b/gcc/config/i386/constraints.md
@@ -92,6 +92,7 @@
 ;;  p  Integer register when TARGET_PARTIAL_REG_STALL is disabled
 ;;  d  Integer register when integer DFmode moves are enabled
 ;;  x  Integer register when integer XFmode moves are enabled
+;;  f  x87 register when 80387 floating point arithmetic is enabled
 
 (define_register_constraint "Yz" "TARGET_SSE ? SSE_FIRST_REG : NO_REGS"
  "First SSE register (@code{%xmm0}).")
@@ -118,6 +119,10 @@
  "optimize_function_for_speed_p (cfun) ? GENERAL_REGS : NO_REGS"
  "@internal Any integer register when integer XFmode moves are enabled.")
 
+(define_register_constraint "Yf"
+ "(ix86_fpmath & FPMATH_387) ? FLOAT_REGS : NO_REGS"
+ "@internal Any x87 register when 80387 FP arithmetic is enabled.")
+
 (define_constraint "z"
   "@internal Constant call address operand."
   (match_operand 0 "constant_call_address_operand"))