diff options
Diffstat (limited to 'gcc/doc/md.texi')
| -rw-r--r-- | gcc/doc/md.texi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index 274dd03..33b37e7 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -5746,6 +5746,7 @@ Operand 1 and operand 2 are of the same mode. Their product, which is of a wider mode, is computed and added to operand 3. Operand 3 is of a mode equal or wider than the mode of the product. The result is placed in operand 0, which is of the same mode as operand 3. +@var{m} is the mode of operand 1 and operand 2. Semantically the expressions perform the multiplication in the following signs @@ -5763,6 +5764,7 @@ Operand 1 and operand 2 are of the same mode. Their product, which is of a wider mode, is computed and added to operand 3. Operand 3 is of a mode equal or wider than the mode of the product. The result is placed in operand 0, which is of the same mode as operand 3. +@var{m} is the mode of operand 1 and operand 2. Semantically the expressions perform the multiplication in the following signs @@ -5779,6 +5781,7 @@ Operand 1 must be unsigned and operand 2 signed. Their product, which is of a wider mode, is computed and added to operand 3. Operand 3 is of a mode equal or wider than the mode of the product. The result is placed in operand 0, which is of the same mode as operand 3. +@var{m} is the mode of operand 1 and operand 2. Semantically the expressions perform the multiplication in the following signs @@ -5797,6 +5800,7 @@ Operand 1 and operand 2 are of the same mode. Their absolute difference, which is of a wider mode, is computed and added to operand 3. Operand 3 is of a mode equal or wider than the mode of the absolute difference. The result is placed in operand 0, which is of the same mode as operand 3. +@var{m} is the mode of operand 1 and operand 2. @cindex @code{widen_ssum@var{m}3} instruction pattern @cindex @code{widen_usum@var{m}3} instruction pattern @@ -5806,6 +5810,7 @@ Operands 0 and 2 are of the same mode, which is wider than the mode of operand 1. Add operand 1 to operand 2 and place the widened result in operand 0. (This is used express accumulation of elements into an accumulator of a wider mode.) +@var{m} is the mode of operand 1. @cindex @code{smulhs@var{m}3} instruction pattern @cindex @code{umulhs@var{m}3} instruction pattern @@ -5819,6 +5824,8 @@ op0 = (narrow) (((wide) op1 * (wide) op2) >> (N / 2 - 1)); @end smallexample where the sign of @samp{narrow} determines whether this is a signed or unsigned operation, and @var{N} is the size of @samp{wide} in bits. +@var{m} is the mode for all 3 operands (narrow). The wide mode is not specified +and is defined to fit the whole multiply. @cindex @code{smulhrs@var{m}3} instruction pattern @cindex @code{umulhrs@var{m}3} instruction pattern @@ -5833,6 +5840,8 @@ op0 = (narrow) (((((wide) op1 * (wide) op2) >> (N / 2 - 2)) + 1) >> 1); @end smallexample where the sign of @samp{narrow} determines whether this is a signed or unsigned operation, and @var{N} is the size of @samp{wide} in bits. +@var{m} is the mode for all 3 operands (narrow). The wide mode is not specified +and is defined to fit the whole multiply. @cindex @code{sdiv_pow2@var{m}3} instruction pattern @cindex @code{sdiv_pow2@var{m}3} instruction pattern |