From 883259c6d3071d35451cd34353191565bc4cee34 Mon Sep 17 00:00:00 2001 From: Roger Sayle Date: Tue, 22 Aug 2006 12:42:41 +0000 Subject: [PATCH] i386.c (ix86_value_regno): Don't return FIRST_MMX_REG if !TARGET_MMX... * config/i386/i386.c (ix86_value_regno): Don't return FIRST_MMX_REG if !TARGET_MMX, and don't return FIRST_SSE_REG if !TARGET_SSE. From-SVN: r116321 --- gcc/ChangeLog | 5 +++++ gcc/config/i386/i386.c | 12 +++++++----- 2 files changed, 12 insertions(+), 5 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 685b4b6daf9..136ba9dd9d2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2006-08-22 Roger Sayle + + * config/i386/i386.c (ix86_value_regno): Don't return FIRST_MMX_REG + if !TARGET_MMX, and don't return FIRST_SSE_REG if !TARGET_SSE. + 2006-08-21 Jason Merrill PR c++/27115 diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index fe0d516c05e..5161ddaa693 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -3980,14 +3980,16 @@ ix86_value_regno (enum machine_mode mode, tree func, tree fntype) gcc_assert (!TARGET_64BIT); /* 8-byte vector modes in %mm0. See ix86_return_in_memory for where - we prevent this case when mmx is not available. */ - if ((VECTOR_MODE_P (mode) && GET_MODE_SIZE (mode) == 8)) - return FIRST_MMX_REG; + we normally prevent this case when mmx is not available. However + some ABIs may require the result to be returned like DImode. */ + if (VECTOR_MODE_P (mode) && GET_MODE_SIZE (mode) == 8) + return TARGET_MMX ? FIRST_MMX_REG : 0; /* 16-byte vector modes in %xmm0. See ix86_return_in_memory for where - we prevent this case when sse is not available. */ + we prevent this case when sse is not available. However some ABIs + may require the result to be returned like integer TImode. */ if (mode == TImode || (VECTOR_MODE_P (mode) && GET_MODE_SIZE (mode) == 16)) - return FIRST_SSE_REG; + return TARGET_SSE ? FIRST_SSE_REG : 0; /* Decimal floating point values can go in %eax, unlike other float modes. */ if (DECIMAL_FLOAT_MODE_P (mode)) -- 2.30.2