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Generate more efficient vec4-stack code for real le compare.

This commit is contained in:
Stephen Williams 2014-12-02 14:53:01 -08:00
parent a57e0a1e3f
commit 1645e682f4
1 changed files with 44 additions and 1 deletions
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45
tgt-vvp/eval_condit.c
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@ -112,6 +112,49 @@ static int draw_condition_binary_compare(ivl_expr_t expr)
}
static int draw_condition_binary_real_le(ivl_expr_t expr)
{
ivl_expr_t le = ivl_expr_oper1(expr);
ivl_expr_t re = ivl_expr_oper2(expr);
ivl_expr_t tmp;
char use_opcode = ivl_expr_opcode(expr);
/* If this is a > or >=, then convert it to < or <= by
swapping the operands. Adjust the opcode to match. */
switch (use_opcode) {
case 'G':
tmp = le;
le = re;
re = tmp;
use_opcode = 'L';
break;
case '>':
tmp = le;
le = re;
re = tmp;
use_opcode = '<';
break;
}
draw_eval_real(le);
draw_eval_real(re);
fprintf(vvp_out, " %%cmp/wr;\n");
switch (use_opcode) {
case '<':
return 5;
case 'L':
fprintf(vvp_out, " %%flag_or 5, 4;\n");
return 5;
default:
assert(0);
return -1;
}
}
static int draw_condition_binary_le(ivl_expr_t expr)
{
ivl_expr_t le = ivl_expr_oper1(expr);
@ -120,7 +163,7 @@ static int draw_condition_binary_le(ivl_expr_t expr)
if ((ivl_expr_value(le) == IVL_VT_REAL)
|| (ivl_expr_value(re) == IVL_VT_REAL)) {
return draw_condition_fallback(expr);
return draw_condition_binary_real_le(expr);
}
if ((ivl_expr_value(le)==IVL_VT_STRING)